├── .gitignore ├── .jsdoc.json ├── LICENSE ├── README.md ├── arc.js ├── bezierCurveThrough.js ├── bezierCurveTo.js ├── circle.js ├── dist ├── shape-points.es.js ├── shape-points.es.js.map ├── shape-points.js └── shape-points.js.map ├── docs ├── code.js ├── highlight.js ├── index.html ├── index.js ├── index.js.map ├── jsdoc │ ├── arc.js.html │ ├── bezierCurveThrough.js.html │ ├── bezierCurveTo.js.html │ ├── circle.js.html │ ├── ellipse.js.html │ ├── fonts │ │ ├── OpenSans-Bold-webfont.eot │ │ ├── OpenSans-Bold-webfont.svg │ │ ├── OpenSans-Bold-webfont.woff │ │ ├── OpenSans-BoldItalic-webfont.eot │ │ ├── OpenSans-BoldItalic-webfont.svg │ │ ├── OpenSans-BoldItalic-webfont.woff │ │ ├── OpenSans-Italic-webfont.eot │ │ ├── OpenSans-Italic-webfont.svg │ │ ├── OpenSans-Italic-webfont.woff │ │ ├── OpenSans-Light-webfont.eot │ │ ├── OpenSans-Light-webfont.svg │ │ ├── OpenSans-Light-webfont.woff │ │ ├── OpenSans-LightItalic-webfont.eot │ │ ├── OpenSans-LightItalic-webfont.svg │ │ ├── OpenSans-LightItalic-webfont.woff │ │ ├── OpenSans-Regular-webfont.eot │ │ ├── OpenSans-Regular-webfont.svg │ │ └── OpenSans-Regular-webfont.woff │ ├── global.html │ ├── index.html │ ├── index.js.html │ ├── line.js.html │ ├── module-shape-points.html │ ├── module-shape-points_arc.html │ ├── module-shape-points_bezierCurveThrough.html │ ├── module-shape-points_bezierCurveTo.html │ ├── module-shape-points_circle.html │ ├── module-shape-points_ellipse.html │ ├── module-shape-points_line.html │ ├── module-shape-points_quadraticCurveTo.html │ ├── module-shape-points_rect.html │ ├── module-shape-points_roundedRect.html │ ├── quadraticCurveTo.js.html │ ├── rect.js.html │ ├── roundedRect.js.html │ ├── scripts │ │ ├── linenumber.js │ │ └── prettify │ │ │ ├── Apache-License-2.0.txt │ │ │ ├── lang-css.js │ │ │ └── prettify.js │ ├── shape-points.module_arc.html │ └── styles │ │ ├── jsdoc-default.css │ │ ├── prettify-jsdoc.css │ │ └── prettify-tomorrow.css ├── rollup.config.js └── rollup.dev.js ├── ellipse.js ├── index.js ├── line.js ├── package.json ├── quadraticCurveTo.js ├── rect.js ├── rollup.config.js ├── roundedRect.js └── yarn.lock /.gitignore: -------------------------------------------------------------------------------- 1 | node_modules -------------------------------------------------------------------------------- /.jsdoc.json: -------------------------------------------------------------------------------- 1 | { 2 | "applicationName": "shape-points", 3 | "meta": { 4 | "title": "shape-points", 5 | "description": "", 6 | "keyword": "" 7 | }, 8 | "linenums": true, 9 | "source": { 10 | "include": [ 11 | "./index.js", 12 | "./arc.js", 13 | "./bezierCurveTo.js", 14 | "./bezierCurveThrough.js", 15 | "./circle.js", 16 | "./ellipse.js", 17 | "./line.js", 18 | "./quadraticCurveTo.js", 19 | "./rect.js", 20 | "./roundedRect.js" 21 | ] 22 | }, 23 | "opts": { 24 | "readme": "./README.md", 25 | "encoding": "utf8", 26 | "recurse": true, 27 | "private": false, 28 | "lenient": true, 29 | "destination": "./docs/jsdoc" 30 | }, 31 | "plugins": [ 32 | "plugins/markdown" 33 | ], 34 | "templates": { 35 | "default": { 36 | "outputSourceFiles": true 37 | }, 38 | "applicationName": "shape-points", 39 | "footer" : "by YOPEY YOPEY LLC (yopeyopey.com)", 40 | "copyright" : "Copyright © 2019 YOPEY YOPEY LLC.", 41 | "meta": { 42 | "title": "shape-points API Documentation", 43 | "description": "Documentation for shape-points library", 44 | "keyword": "docs, documentation, html5, javascript, jsdoc, shape, points, arc, bezier, bezierCurveTo, circle, ellipse, quadraticCurveTo, roundedRect" 45 | } 46 | } 47 | } -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | The MIT License (MIT) 2 | 3 | Copyright (c) 2017 YOPEY YOPEY LLC 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # shape-points 2 | Generate points for simple shapes and curves: arcs, rectangles, rounded rectangles, circles, ellipses, bezierCurveTo, bezierCurveThrough (i.e., bezier curves through specific points) 3 | 4 | ## rationale 5 | 6 | I needed to find the points of a rounded rectangle. Then I had fun adding lots of other shapes and curves. 7 | 8 | ## installation 9 | 10 | ``` 11 | yarn add shape-points 12 | ``` 13 | or 14 | ``` 15 | npm i shape-points 16 | ``` 17 | ## programmatic example 18 | ```js 19 | import * as ShapePoints from 'shape-points' 20 | 21 | // alternatively: 22 | // const roundedRect = require('shape-points').roundedRect 23 | 24 | const points = ShapePoints.roundedRect(125, 100, 200, 100, 30) 25 | 26 | // assuming a canvas context was set up 27 | context.moveTo(points[0], points[1]) 28 | for (let i = 2; i < points.length; i += 2) 29 | { 30 | context.lineTo(points[i], points[i + 1]) 31 | } 32 | context.stroke() 33 | ``` 34 | ## live example 35 | https://davidfig.github.io/shape-points/ 36 | 37 | ## API 38 | https://davidfig.github.io/shape-points/jsdoc/ 39 | 40 | ## License 41 | MIT License 42 | (c) 2018 [YOPEY YOPEY LLC](https://yopeyopey.com/) by [David Figatner](https://twitter.com/yopey_yopey/) 43 | -------------------------------------------------------------------------------- /arc.js: -------------------------------------------------------------------------------- 1 | /** 2 | * calculate points for arc 3 | * @module shape-points/arc 4 | * @param {number} x 5 | * @param {number} y 6 | * @param {number} start angle (radians) 7 | * @param {number} end angle (radians) 8 | * @param {number} radius 9 | * @param {number} [pointsInArc=5] 10 | * @returns {array} [x1, y1, x2, y2, ... xn, yn] 11 | */ 12 | export function arc(x, y, start, end, radius, pointsInArc) 13 | { 14 | pointsInArc = pointsInArc > 1 ? pointsInArc : 5 15 | const points = [] 16 | let angle = start 17 | const interval = (end - start) / (pointsInArc - 1) 18 | for (let count = 0; count < pointsInArc; count++) 19 | { 20 | points.push(x + radius * Math.cos(angle), y + radius * Math.sin(angle)) 21 | angle += interval 22 | } 23 | return points 24 | } 25 | 26 | -------------------------------------------------------------------------------- /bezierCurveThrough.js: -------------------------------------------------------------------------------- 1 | import Curve from 'fit-curve' 2 | 3 | import { bezierCurveTo } from './bezierCurveTo' 4 | 5 | /** 6 | * Calculate points for smooth bezier curves passing through a series of points 7 | * uses https://github.com/soswow/fit-curve/blob/master/src/fit-curve.js 8 | * uses ShapePoints.curveError=50 for error value 9 | * @module shape-points/bezierCurveThrough 10 | * @param {(number|number[])} x1 - starting point or array of points [x1, y1, x2, y2, ... xn, yn] 11 | * @param {number} [y1] 12 | * @param {number} [x2] 13 | * @param {number} [y2] 14 | * @param {number} [xn] - ending point 15 | * @param {number} [yn] 16 | * @param {object} [options] 17 | * @param {number} [options.pointsInArc=5] 18 | * @param {number} [options.curveError=50] 19 | * @returns {number[]} [x1, y1, x2, y2, ... xn, yn] 20 | */ 21 | export function bezierCurveThrough() 22 | { 23 | let pointsInArc = 5, curveError = 50 24 | const points = [] 25 | if (Array.isArray(arguments[0])) 26 | { 27 | const array = arguments[0] 28 | for (let i = 0; i < array.length; i += 2) 29 | { 30 | points.push([array[i], array[i + 1]]) 31 | } 32 | if (arguments.length === 2) 33 | { 34 | pointsInArc = arguments[1].pointsInArc 35 | curveError = arguments[1].curveError 36 | } 37 | } 38 | else 39 | { 40 | let length = arguments.length 41 | if (arguments.length % 2 === 1) 42 | { 43 | length-- 44 | pointsInArc = arguments[length].pointsInArc 45 | curveError = arguments[length].curveError 46 | } 47 | for (let i = 0; i < length; i += 2) 48 | { 49 | points.push([arguments[i], arguments[i + 1]]) 50 | } 51 | } 52 | 53 | // two points creates a line 54 | if (points.length === 2) 55 | { 56 | return [points[0][0], points[0][1], points[1][0], points[1][1]] 57 | } 58 | 59 | // not enough points 60 | if (points.length < 4) 61 | { 62 | return [] 63 | } 64 | 65 | const results = [] 66 | const curves = Curve(points, curveError) 67 | for (let i = 0; i < curves.length; i++) 68 | { 69 | const c = curves[i] 70 | results.push(...bezierCurveTo(c[0][0], c[0][1], c[1][0], c[1][1], c[2][0], c[2][1], c[3][0], c[3][1], pointsInArc)) 71 | } 72 | return results 73 | } -------------------------------------------------------------------------------- /bezierCurveTo.js: -------------------------------------------------------------------------------- 1 | /** 2 | * Calculate points for a bezier curve with a starting point and two control points 3 | * from https://stackoverflow.com/a/15399173/1955997 4 | * @module shape-points/bezierCurveTo 5 | * @param {number} x1 - starting point (usually a moveTo) 6 | * @param {number} y1 - starting point 7 | * @param {number} cp1x - first control point 8 | * @param {number} cp1y - first control point 9 | * @param {number} cp2x - second control point 10 | * @param {number} cp2y - second control point 11 | * @param {number} x2 - ending point 12 | * @param {number} y2 - ending point 13 | * @param {number} [pointsInArc=5] 14 | * @returns {array} [x1, y1, x2, y2, ... xn, yn] 15 | */ 16 | export function bezierCurveTo(x1, y1, cp1x, cp1y, cp2x, cp2y, x2, y2, pointsInArc) 17 | { 18 | pointsInArc = pointsInArc || 5 19 | const points = [] 20 | const interval = 1 / pointsInArc 21 | for (let t = 0; t <= 1; t += interval) 22 | { 23 | const B0_t = Math.pow(1 - t, 3), 24 | B1_t = 3 * t * Math.pow(1 - t, 2), 25 | B2_t = 3 * Math.pow(t, 2) * (1 - t), 26 | B3_t = Math.pow(t, 3) 27 | 28 | points.push( 29 | (B0_t * x1) + (B1_t * cp1x) + (B2_t * cp2x) + (B3_t * x2), 30 | (B0_t * y1) + (B1_t * cp1y) + (B2_t * cp2y) + (B3_t * y2) 31 | ) 32 | } 33 | return points 34 | } 35 | -------------------------------------------------------------------------------- /circle.js: -------------------------------------------------------------------------------- 1 | /** 2 | * calculate points for a circle (calculates using pointsInArc * 4) 3 | * @module shape-points/circle 4 | * @param {number} x 5 | * @param {number} y 6 | * @param {number} radius 7 | * @param {number} [pointsInArc=5] 8 | * @returns {array} [x1, y1, x2, y2, ... xn, yn] 9 | */ 10 | export function circle(x, y, radius, pointsInArc) 11 | { 12 | pointsInArc = pointsInArc || 5 13 | const points = [] 14 | const interval = Math.PI * 2 / (pointsInArc * 4) 15 | for (let i = 0; i < Math.PI * 2; i += interval) 16 | { 17 | points.push(x + Math.cos(i) * radius, y + Math.sin(i) * radius) 18 | } 19 | return points 20 | } -------------------------------------------------------------------------------- /dist/shape-points.js: -------------------------------------------------------------------------------- 1 | !function(t,r){"object"==typeof exports&&"undefined"!=typeof module?r(exports):"function"==typeof define&&define.amd?define(["exports"],r):r((t=t||self).ShapePoints={})}(this,(function(t){"use strict";function r(t,r,n,e,o,u){const a=[];let i=n;const s=(e-n)/((u=u>1?u:5)-1);for(let n=0;no&&(o=e,i=h);return[o,i]}(t,c=function(t,r,n,e){var o,u,a,i,c,h,m,l,p,d,b,M,I,g,y,v,A,L=t[0],P=t[t.length-1];for(o=[L,null,null,P],u=s.zeros_Xx2x2(r.length),I=0,g=r.length;I1)return 1;for(var o,u,a,i,s=1;s<=e;s++)if(r<=n[s]){a=(s-1)/e,u=s/e,i=(r-(o=n[s-1]))/(n[s]-o)*(u-a)+a;break}return i}function i(t,r){return s.normalize(s.subtract(t,r))}var s=function(){function t(){r(this,t)}return t.zeros_Xx2x2=function(t){for(var r=[];t--;)r.push([0,0]);return r},t.mulItems=function(t,r){return t.map((function(t){return t*r}))},t.mulMatrix=function(t,r){return t.reduce((function(t,n,e){return t+n*r[e]}),0)},t.subtract=function(t,r){return t.map((function(t,n){return t-r[n]}))},t.addArrays=function(t,r){return t.map((function(t,n){return t+r[n]}))},t.addItems=function(t,r){return t.map((function(t){return t+r}))},t.sum=function(t){return t.reduce((function(t,r){return t+r}))},t.dot=function(r,n){return t.mulMatrix(r,n)},t.vectorLen=function(t){return Math.hypot.apply(Math,t)},t.divItems=function(t,r){return t.map((function(t){return t/r}))},t.squareItems=function(t){return t.map((function(t){return t*t}))},t.normalize=function(t){return this.divItems(t,this.vectorLen(t))},t}(),f=function(){function t(){r(this,t)}return t.q=function(t,r){var n=1-r,e=s.mulItems(t[0],n*n*n),o=s.mulItems(t[1],3*n*n*r),u=s.mulItems(t[2],3*n*r*r),a=s.mulItems(t[3],r*r*r);return s.addArrays(s.addArrays(e,o),s.addArrays(u,a))},t.qprime=function(t,r){var n=1-r,e=s.mulItems(s.subtract(t[1],t[0]),3*n*n),o=s.mulItems(s.subtract(t[2],t[1]),6*n*r),u=s.mulItems(s.subtract(t[3],t[2]),3*r*r);return s.addArrays(s.addArrays(e,o),u)},t.qprimeprime=function(t,r){return s.addArrays(s.mulItems(s.addArrays(s.subtract(t[2],s.mulItems(t[1],2)),t[0]),6*(1-r)),s.mulItems(s.addArrays(s.subtract(t[3],s.mulItems(t[2],2)),t[1]),6*r))},t}();t.exports=function(t,r,o){if(!Array.isArray(t))throw new TypeError("First argument should be an array");if(t.forEach((function(r){if(!Array.isArray(r)||r.some((function(t){return"number"!=typeof t}))||r.length!==t[0].length)throw Error("Each point should be an array of numbers. Each point should have the same amount of numbers.")})),(t=t.filter((function(r,n){return 0===n||!r.every((function(r,e){return r===t[n-1][e]}))}))).length<2)return[];var u=t.length,a=i(t[1],t[0]),f=i(t[u-2],t[u-1]);return function t(r,o,u,a,i){var f,c,h,m,l,p,d,b,M,I,g,y,v;if(2===r.length)return y=s.vectorLen(s.subtract(r[0],r[1]))/3,[f=[r[0],s.addArrays(r[0],s.mulItems(o,y)),s.addArrays(r[1],s.mulItems(u,y)),r[1]]];c=function(t){var r,n,e,o=[];return t.forEach((function(t,u){r=u?n+s.vectorLen(s.subtract(t,e)):0,o.push(r),n=r,e=t})),o=o.map((function(t){return t/n}))}(r);var A=n(r,c,c,o,u,i);if(f=A[0],m=A[1],p=A[2],0===m||m.9999&&P<1.0001)break}l=m,d=p}if(g=[],(b=s.subtract(r[p-1],r[p+1])).every((function(t){return 0===t}))){var x=[-(b=s.subtract(r[p-1],r[p]))[1],b[0]];b[0]=x[0],b[1]=x[1]}return M=s.normalize(b),I=s.mulItems(M,-1),g=(g=g.concat(t(r.slice(0,p+1),o,M,a,i))).concat(t(r.slice(p),I,u,a,i))}(t,a,f,r,o)}}(t)}));t.arc=r,t.bezierCurveThrough=function(){let t=5,r=50;const o=[];if(Array.isArray(arguments[0])){const n=arguments[0];for(let t=0;t 2 | 3 | 39 | 40 | 41 | 42 | 43 | 44 |
Example for github.com/davidfig/shape-points/
45 |
46 | -------------------------------------------------------------------------------- /docs/jsdoc/arc.js.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Source: arc.js 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Source: arc.js

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 |
29 | 
/**
30 |  * calculate points for arc
31 |  * @module shape-points/arc
32 |  * @param {number} x
33 |  * @param {number} y
34 |  * @param {number} start angle (radians)
35 |  * @param {number} end angle (radians)
36 |  * @param {number} radius
37 |  * @param {number} [pointsInArc=5]
38 |  * @returns {array} [x1, y1, x2, y2, ... xn, yn]
39 |  */
40 | export function arc(x, y, start, end, radius, pointsInArc)
41 | {
42 |     pointsInArc = pointsInArc > 1 ? pointsInArc : 5
43 |     const points = []
44 |     let angle = start
45 |     const interval = (end - start) / (pointsInArc - 1)
46 |     for (let count = 0; count < pointsInArc; count++)
47 |     {
48 |         points.push(x + radius * Math.cos(angle), y + radius * Math.sin(angle))
49 |         angle += interval
50 |     }
51 |     return points
52 | }
53 | 
54 |
55 |
56 |
57 | 58 | 59 | 60 | 61 |
62 | 63 | 66 | 67 |
68 | 69 |
70 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 71 |
72 | 73 | 74 | 75 | 76 | 77 | -------------------------------------------------------------------------------- /docs/jsdoc/bezierCurveThrough.js.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Source: bezierCurveThrough.js 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Source: bezierCurveThrough.js

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 |
29 | 
import Curve from 'fit-curve'
 30 | 
 31 | import { bezierCurveTo } from './bezierCurveTo'
 32 | 
 33 | /**
 34 |  * Calculate points for smooth bezier curves passing through a series of points
 35 |  * uses https://github.com/soswow/fit-curve/blob/master/src/fit-curve.js
 36 |  * uses ShapePoints.curveError=50 for error value
 37 |  * @module shape-points/bezierCurveThrough
 38 |  * @param {(number|number[])} x1 - starting point or array of points [x1, y1, x2, y2, ... xn, yn]
 39 |  * @param {number} [y1]
 40 |  * @param {number} [x2]
 41 |  * @param {number} [y2]
 42 |  * @param {number} [xn] - ending point
 43 |  * @param {number} [yn]
 44 |  * @param {object} [options]
 45 |  * @param {number} [options.pointsInArc=5]
 46 |  * @param {number} [options.curveError=50]
 47 |  * @returns {number[]} [x1, y1, x2, y2, ... xn, yn]
 48 |  */
 49 | export function bezierCurveThrough()
 50 | {
 51 |     let pointsInArc = 5, curveError = 50
 52 |     const points = []
 53 |     if (Array.isArray(arguments[0]))
 54 |     {
 55 |         const array = arguments[0]
 56 |         for (let i = 0; i < array.length; i += 2)
 57 |         {
 58 |             points.push([array[i], array[i + 1]])
 59 |         }
 60 |         if (arguments.length === 2)
 61 |         {
 62 |             pointsInArc = arguments[1].pointsInArc
 63 |             curveError = arguments[1].curveError
 64 |         }
 65 |     }
 66 |     else
 67 |     {
 68 |         let length = arguments.length
 69 |         if (arguments.length % 2 === 1)
 70 |         {
 71 |             length--
 72 |             pointsInArc = arguments[length].pointsInArc
 73 |             curveError = arguments[length].curveError
 74 |         }
 75 |         for (let i = 0; i < length; i += 2)
 76 |         {
 77 |             points.push([arguments[i], arguments[i + 1]])
 78 |         }
 79 |     }
 80 | 
 81 |     // two points creates a line
 82 |     if (points.length === 2)
 83 |     {
 84 |         return [points[0][0], points[0][1], points[1][0], points[1][1]]
 85 |     }
 86 | 
 87 |     // not enough points
 88 |     if (points.length < 4)
 89 |     {
 90 |         return []
 91 |     }
 92 | 
 93 |     const results = []
 94 |     const curves = Curve(points, curveError)
 95 |     for (let i = 0; i < curves.length; i++)
 96 |     {
 97 |         const c = curves[i]
 98 |         results.push(...bezierCurveTo(c[0][0], c[0][1], c[1][0], c[1][1], c[2][0], c[2][1], c[3][0], c[3][1], pointsInArc))
 99 |     }
100 |     return results
101 | }
102 |
103 |
104 | 105 | 106 | 107 | 108 |
109 | 110 | 113 | 114 |
115 | 116 |
117 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 118 |
119 | 120 | 121 | 122 | 123 | 124 | -------------------------------------------------------------------------------- /docs/jsdoc/bezierCurveTo.js.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Source: bezierCurveTo.js 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Source: bezierCurveTo.js

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 |
29 | 
/**
30 |  * Calculate points for a bezier curve with a starting point and two control points
31 |  * from https://stackoverflow.com/a/15399173/1955997
32 |  * @module shape-points/bezierCurveTo
33 |  * @param {number} x1 - starting point (usually a moveTo)
34 |  * @param {number} y1 - starting point
35 |  * @param {number} cp1x - first control point
36 |  * @param {number} cp1y - first control point
37 |  * @param {number} cp2x - second control point
38 |  * @param {number} cp2y - second control point
39 |  * @param {number} x2 - ending point
40 |  * @param {number} y2 - ending point
41 |  * @param {number} [pointsInArc=5]
42 |  * @returns {array} [x1, y1, x2, y2, ... xn, yn]
43 |  */
44 | export function bezierCurveTo(x1, y1, cp1x, cp1y, cp2x, cp2y, x2, y2, pointsInArc)
45 | {
46 |     pointsInArc = pointsInArc || 5
47 |     const points = []
48 |     const interval = 1 / pointsInArc
49 |     for (let t = 0; t <= 1; t += interval)
50 |     {
51 |         const B0_t = Math.pow(1 - t, 3),
52 |             B1_t = 3 * t * Math.pow(1 - t, 2),
53 |             B2_t = 3 * Math.pow(t, 2) * (1 - t),
54 |             B3_t = Math.pow(t, 3)
55 | 
56 |         points.push(
57 |             (B0_t * x1) + (B1_t * cp1x) + (B2_t * cp2x) + (B3_t * x2),
58 |             (B0_t * y1) + (B1_t * cp1y) + (B2_t * cp2y) + (B3_t * y2)
59 |         )
60 |     }
61 |     return points
62 | }
63 |
64 |
65 |
66 | 67 | 68 | 69 | 70 |
71 | 72 | 75 | 76 |
77 | 78 |
79 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 80 |
81 | 82 | 83 | 84 | 85 | 86 | -------------------------------------------------------------------------------- /docs/jsdoc/circle.js.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Source: circle.js 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Source: circle.js

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 |
29 | 
/**
30 |  * calculate points for a circle (calculates using pointsInArc * 4)
31 |  * @module shape-points/circle
32 |  * @param {number} x
33 |  * @param {number} y
34 |  * @param {number} radius
35 |  * @param {number} [pointsInArc=5]
36 |  * @returns {array} [x1, y1, x2, y2, ... xn, yn]
37 |  */
38 | export function circle(x, y, radius, pointsInArc)
39 | {
40 |     pointsInArc = pointsInArc || 5
41 |     const points = []
42 |     const interval = Math.PI * 2 / (pointsInArc * 4)
43 |     for (let i = 0; i < Math.PI * 2; i += interval)
44 |     {
45 |         points.push(x + Math.cos(i) * radius, y + Math.sin(i) * radius)
46 |     }
47 |     return points
48 | }
49 |
50 |
51 | 52 | 53 | 54 | 55 |
56 | 57 | 60 | 61 |
62 | 63 |
64 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 65 |
66 | 67 | 68 | 69 | 70 | 71 | -------------------------------------------------------------------------------- /docs/jsdoc/ellipse.js.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Source: ellipse.js 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Source: ellipse.js

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 |
29 | 
/**
30 |  * calculate points for a ellipse (calculates using pointsInArc * 4)
31 |  * @module shape-points/ellipse
32 |  * @param {number} x
33 |  * @param {number} y
34 |  * @param {number} rx
35 |  * @param {number} ry
36 |  * @param {number} [pointsInArc=5]
37 |  * @returns {array} [x1, y1, x2, y2, ... xn, yn]
38 |  */
39 | export function ellipse(x, y, rx, ry, pointsInArc)
40 | {
41 |     pointsInArc = pointsInArc || 5
42 |     const points = []
43 |     const interval = Math.PI * 2 / (pointsInArc * 4)
44 |     for (let i = 0; i < Math.PI * 2; i += interval)
45 |     {
46 |         points.push(x - rx * Math.sin(i), y - ry * Math.cos(i))
47 |     }
48 |     return points
49 | }
50 | 
51 |
52 |
53 |
54 | 55 | 56 | 57 | 58 |
59 | 60 | 63 | 64 |
65 | 66 |
67 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 68 |
69 | 70 | 71 | 72 | 73 | 74 | -------------------------------------------------------------------------------- /docs/jsdoc/fonts/OpenSans-Bold-webfont.eot: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/davidfig/shape-points/144d719f36ea521cffbf680dda271e3dde3fc3b5/docs/jsdoc/fonts/OpenSans-Bold-webfont.eot -------------------------------------------------------------------------------- /docs/jsdoc/fonts/OpenSans-Bold-webfont.woff: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/davidfig/shape-points/144d719f36ea521cffbf680dda271e3dde3fc3b5/docs/jsdoc/fonts/OpenSans-Bold-webfont.woff -------------------------------------------------------------------------------- /docs/jsdoc/fonts/OpenSans-BoldItalic-webfont.eot: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/davidfig/shape-points/144d719f36ea521cffbf680dda271e3dde3fc3b5/docs/jsdoc/fonts/OpenSans-BoldItalic-webfont.eot -------------------------------------------------------------------------------- /docs/jsdoc/fonts/OpenSans-BoldItalic-webfont.woff: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/davidfig/shape-points/144d719f36ea521cffbf680dda271e3dde3fc3b5/docs/jsdoc/fonts/OpenSans-BoldItalic-webfont.woff -------------------------------------------------------------------------------- /docs/jsdoc/fonts/OpenSans-Italic-webfont.eot: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/davidfig/shape-points/144d719f36ea521cffbf680dda271e3dde3fc3b5/docs/jsdoc/fonts/OpenSans-Italic-webfont.eot -------------------------------------------------------------------------------- /docs/jsdoc/fonts/OpenSans-Italic-webfont.woff: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/davidfig/shape-points/144d719f36ea521cffbf680dda271e3dde3fc3b5/docs/jsdoc/fonts/OpenSans-Italic-webfont.woff -------------------------------------------------------------------------------- /docs/jsdoc/fonts/OpenSans-Light-webfont.eot: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/davidfig/shape-points/144d719f36ea521cffbf680dda271e3dde3fc3b5/docs/jsdoc/fonts/OpenSans-Light-webfont.eot -------------------------------------------------------------------------------- /docs/jsdoc/fonts/OpenSans-Light-webfont.woff: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/davidfig/shape-points/144d719f36ea521cffbf680dda271e3dde3fc3b5/docs/jsdoc/fonts/OpenSans-Light-webfont.woff -------------------------------------------------------------------------------- /docs/jsdoc/fonts/OpenSans-LightItalic-webfont.eot: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/davidfig/shape-points/144d719f36ea521cffbf680dda271e3dde3fc3b5/docs/jsdoc/fonts/OpenSans-LightItalic-webfont.eot -------------------------------------------------------------------------------- /docs/jsdoc/fonts/OpenSans-LightItalic-webfont.woff: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/davidfig/shape-points/144d719f36ea521cffbf680dda271e3dde3fc3b5/docs/jsdoc/fonts/OpenSans-LightItalic-webfont.woff -------------------------------------------------------------------------------- /docs/jsdoc/fonts/OpenSans-Regular-webfont.eot: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/davidfig/shape-points/144d719f36ea521cffbf680dda271e3dde3fc3b5/docs/jsdoc/fonts/OpenSans-Regular-webfont.eot -------------------------------------------------------------------------------- /docs/jsdoc/fonts/OpenSans-Regular-webfont.woff: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/davidfig/shape-points/144d719f36ea521cffbf680dda271e3dde3fc3b5/docs/jsdoc/fonts/OpenSans-Regular-webfont.woff -------------------------------------------------------------------------------- /docs/jsdoc/index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Home 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Home

21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 |

30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 |
46 |

shape-points

47 |

Generate points for simple shapes and curves: arcs, rectangles, rounded rectangles, circles, ellipses, bezierCurveTo, bezierCurveThrough (i.e., bezier curves through specific points)

48 |

rationale

49 |

I needed to find the points of a rounded rectangle. Then I had fun adding lots of other shapes and curves.

50 |

installation

51 | 
yarn add shape-points
 52 |
53 |

or

54 | 
npm i shape-points
 55 |
56 |

programmatic example

57 | 
import * as ShapePoints from 'shape-points'
 58 | 
 59 | // alternatively: 
 60 | // const roundedRect = require('shape-points').roundedRect
 61 | 
 62 | const points = ShapePoints.roundedRect(125, 100, 200, 100, 30)
 63 | 
 64 | // assuming a canvas context was set up
 65 | context.moveTo(points[0], points[1])
 66 | for (let i = 2; i < points.length; i += 2)
 67 | {
 68 |     context.lineTo(points[i], points[i + 1])
 69 | }
 70 | context.stroke()
 71 |
72 |

live example

73 |

https://davidfig.github.io/shape-points/

74 |

API

75 |

https://davidfig.github.io/shape-points/jsdoc/

76 |

License

77 |

MIT License
78 | (c) 2018 YOPEY YOPEY LLC by David Figatner

79 |
80 | 81 | 82 | 83 | 84 | 85 | 86 |
87 | 88 | 91 | 92 |
93 | 94 |
95 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 96 |
97 | 98 | 99 | 100 | 101 | -------------------------------------------------------------------------------- /docs/jsdoc/index.js.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Source: index.js 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Source: index.js

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 |
29 | 
/** @module shape-points */
30 | 
31 | export { rect } from './rect'
32 | export { arc } from './arc'
33 | export { roundedRect } from './roundedRect'
34 | export { line } from './line'
35 | export { circle } from './circle'
36 | export { ellipse } from './ellipse'
37 | export { bezierCurveTo } from './bezierCurveTo'
38 | export { bezierCurveThrough } from './bezierCurveThrough'
39 | export { quadraticCurveTo } from './quadraticCurveTo'
40 |
41 |
42 | 43 | 44 | 45 | 46 |
47 | 48 | 51 | 52 |
53 | 54 |
55 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 56 |
57 | 58 | 59 | 60 | 61 | 62 | -------------------------------------------------------------------------------- /docs/jsdoc/line.js.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Source: line.js 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Source: line.js

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 |
29 | 
/**
30 |  * calculate points for a line with a certain thickness (either one thickness or a starting and ending thickness)
31 |  * @module shape-points/line
32 |  * @param {number} x1
33 |  * @param {number} y1
34 |  * @param {number} x2
35 |  * @param {number} y2
36 |  * @param {number|object} [thickness]
37 |  * @param {number} thickness.start
38 |  * @param {number} thickness.end
39 |  * @returns {array} [x1, y1, x2, y2, ... xn, yn]
40 |  */
41 | export function line(x1, y1, x2, y2, thickness)
42 | {
43 |     thickness = thickness || 0
44 |     const angle = Math.atan2(y2 - y1, x2 - x1)
45 |     const perp = angle - Math.PI / 2
46 |     const half = isNaN(thickness) ? { start: thickness.start / 2, end: thickness.end / 2 } : { start: thickness / 2, end: thickness / 2 }
47 |     return [
48 |         x1 - Math.cos(perp) * half.start, y1 - Math.sin(perp) * half.start,
49 |         x2 - Math.cos(perp) * half.end, y2 - Math.sin(perp) * half.end,
50 |         x2 + Math.cos(perp) * half.end, y2 + Math.sin(perp) * half.end,
51 |         x1 + Math.cos(perp) * half.start, y1 + Math.sin(perp) * half.start
52 |     ]
53 | }
54 | 
55 |
56 |
57 |
58 | 59 | 60 | 61 | 62 |
63 | 64 | 67 | 68 |
69 | 70 |
71 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 72 |
73 | 74 | 75 | 76 | 77 | 78 | -------------------------------------------------------------------------------- /docs/jsdoc/module-shape-points.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Module: shape-points 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Module: shape-points

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 | 29 |
30 | 31 | 32 | 33 |
34 | 35 |
36 |
37 | 38 | 39 | 40 | 41 | 42 |
43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 |
64 | 65 |
66 | 67 | 68 | 69 | 70 |
71 | 72 | 75 | 76 |
77 | 78 |
79 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 80 |
81 | 82 | 83 | 84 | 85 | -------------------------------------------------------------------------------- /docs/jsdoc/module-shape-points_arc.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Module: shape-points/arc 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Module: shape-points/arc

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 | 29 |
30 | 31 | 32 | 33 | 34 | 35 |
36 | 37 |
38 |
39 | 40 | 41 |

calculate points for arc

42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 |
Parameters:
58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 97 | 98 | 99 | 106 | 107 | 108 | 109 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 132 | 133 | 134 | 141 | 142 | 143 | 144 | 147 | 148 | 149 | 150 | 151 | 152 | 153 | 154 | 155 | 156 | 157 | 158 | 159 | 167 | 168 | 169 | 176 | 177 | 178 | 179 | 182 | 183 | 184 | 185 | 186 | 187 | 188 | 189 | 190 | 191 | 192 | 193 | 194 | 202 | 203 | 204 | 211 | 212 | 213 | 214 | 217 | 218 | 219 | 220 | 221 | 222 | 223 | 224 | 225 | 226 | 227 | 228 | 229 | 237 | 238 | 239 | 246 | 247 | 248 | 249 | 252 | 253 | 254 | 255 | 256 | 257 | 258 | 259 | 260 | 261 | 262 | 263 | 264 | 272 | 273 | 274 | 283 | 284 | 285 | 286 | 291 | 292 | 293 | 294 | 295 | 296 | 297 | 298 |
NameTypeAttributesDefaultDescription
x 90 | 91 | 92 | number 93 | 94 | 95 | 96 | 100 | 101 | 102 | 103 | 104 | 105 | 110 | 111 |
y 125 | 126 | 127 | number 128 | 129 | 130 | 131 | 135 | 136 | 137 | 138 | 139 | 140 | 145 | 146 |
start 160 | 161 | 162 | number 163 | 164 | 165 | 166 | 170 | 171 | 172 | 173 | 174 | 175 | 180 | 181 |

angle (radians)

end 195 | 196 | 197 | number 198 | 199 | 200 | 201 | 205 | 206 | 207 | 208 | 209 | 210 | 215 | 216 |

angle (radians)

radius 230 | 231 | 232 | number 233 | 234 | 235 | 236 | 240 | 241 | 242 | 243 | 244 | 245 | 250 | 251 |
pointsInArc 265 | 266 | 267 | number 268 | 269 | 270 | 271 | 275 | 276 | <optional>
277 | 278 | 279 | 280 | 281 | 282 | 		287 | 288 | 5 289 | 290 |
299 | 300 | 301 | 302 | 303 | 304 | 305 |
306 | 307 | 308 | 309 | 310 | 311 | 312 | 313 | 314 | 315 | 316 | 317 | 318 | 319 | 320 | 321 | 322 | 323 | 324 | 325 | 326 | 327 | 328 | 329 | 330 | 331 | 332 |
Source:
333 |
336 | 337 | 338 | 339 | 340 | 341 | 342 | 343 |
344 | 345 | 346 | 347 | 348 | 349 | 350 | 351 | 352 | 353 | 354 | 355 | 356 | 357 | 358 | 359 |
Returns:
360 | 361 | 362 |
363 |

[x1, y1, x2, y2, ... xn, yn]

364 |
365 | 366 | 367 | 368 |
369 |
370 | Type 371 |
372 |
373 | 374 | array 375 | 376 | 377 |
378 |
379 | 380 | 381 | 382 | 383 | 384 | 385 | 386 | 387 | 388 |
389 | 390 | 391 | 392 | 393 | 394 | 395 | 396 | 397 | 398 | 399 | 400 | 401 | 402 | 403 | 404 | 405 | 406 | 407 | 408 | 409 |
410 | 411 |
412 | 413 | 414 | 415 | 416 |
417 | 418 | 421 | 422 |
423 | 424 |
425 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 426 |
427 | 428 | 429 | 430 | 431 | -------------------------------------------------------------------------------- /docs/jsdoc/module-shape-points_bezierCurveThrough.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Module: shape-points/bezierCurveThrough 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Module: shape-points/bezierCurveThrough

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 | 29 |
30 | 31 | 32 | 33 | 34 | 35 |
36 | 37 |
38 |
39 | 40 | 41 |

Calculate points for smooth bezier curves passing through a series of points 42 | uses https://github.com/soswow/fit-curve/blob/master/src/fit-curve.js 43 | uses ShapePoints.curveError=50 for error value

44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 |
Parameters:
60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 100 | 101 | 102 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 131 | 132 | 133 | 142 | 143 | 144 | 145 | 146 | 147 | 148 | 149 | 150 | 151 | 152 | 153 | 154 | 155 | 156 | 164 | 165 | 166 | 175 | 176 | 177 | 178 | 179 | 180 | 181 | 182 | 183 | 184 | 185 | 186 | 187 | 188 | 189 | 197 | 198 | 199 | 208 | 209 | 210 | 211 | 212 | 213 | 214 | 215 | 216 | 217 | 218 | 219 | 220 | 221 | 222 | 230 | 231 | 232 | 241 | 242 | 243 | 244 | 245 | 246 | 247 | 248 | 249 | 250 | 251 | 252 | 253 | 254 | 255 | 263 | 264 | 265 | 274 | 275 | 276 | 277 | 278 | 279 | 280 | 281 | 282 | 283 | 284 | 285 | 286 | 287 | 288 | 296 | 297 | 298 | 307 | 308 | 309 | 310 | 311 | 420 | 421 | 422 | 423 | 424 |
NameTypeAttributesDescription
x1 90 | 91 | 92 | number 93 | | 94 | 95 | Array.<number> 96 | 97 | 98 | 99 | 103 | 104 | 105 | 106 | 107 | 108 |

starting point or array of points [x1, y1, x2, y2, ... xn, yn]

y1 124 | 125 | 126 | number 127 | 128 | 129 | 130 | 134 | 135 | <optional>
136 | 137 | 138 | 139 | 140 | 141 |
x2 157 | 158 | 159 | number 160 | 161 | 162 | 163 | 167 | 168 | <optional>
169 | 170 | 171 | 172 | 173 | 174 |
y2 190 | 191 | 192 | number 193 | 194 | 195 | 196 | 200 | 201 | <optional>
202 | 203 | 204 | 205 | 206 | 207 |
xn 223 | 224 | 225 | number 226 | 227 | 228 | 229 | 233 | 234 | <optional>
235 | 236 | 237 | 238 | 239 | 240 |

ending point

yn 256 | 257 | 258 | number 259 | 260 | 261 | 262 | 266 | 267 | <optional>
268 | 269 | 270 | 271 | 272 | 273 |
options 289 | 290 | 291 | object 292 | 293 | 294 | 295 | 299 | 300 | <optional>
301 | 302 | 303 | 304 | 305 | 306 | 		312 |
Properties
313 | 314 | 315 | 316 | 317 | 318 | 319 | 320 | 321 | 322 | 323 | 324 | 325 | 326 | 327 | 328 | 329 | 330 | 331 | 332 | 333 | 334 | 335 | 336 | 337 | 338 | 339 | 340 | 341 | 342 | 343 | 344 | 352 | 353 | 354 | 363 | 364 | 365 | 366 | 371 | 372 | 373 | 374 | 375 | 376 | 377 | 378 | 379 | 380 | 381 | 382 | 383 | 391 | 392 | 393 | 402 | 403 | 404 | 405 | 410 | 411 | 412 | 413 | 414 | 415 | 416 | 417 |
NameTypeAttributesDefaultDescription
pointsInArc 345 | 346 | 347 | number 348 | 349 | 350 | 351 | 355 | 356 | <optional>
357 | 358 | 359 | 360 | 361 | 362 | 		367 | 368 | 5 369 | 370 |
curveError 384 | 385 | 386 | number 387 | 388 | 389 | 390 | 394 | 395 | <optional>
396 | 397 | 398 | 399 | 400 | 401 | 		406 | 407 | 50 408 | 409 |
418 | 419 |
425 | 426 | 427 | 428 | 429 | 430 | 431 |
432 | 433 | 434 | 435 | 436 | 437 | 438 | 439 | 440 | 441 | 442 | 443 | 444 | 445 | 446 | 447 | 448 | 449 | 450 | 451 | 452 | 453 | 454 | 455 | 456 | 457 | 458 |
Source:
459 |
462 | 463 | 464 | 465 | 466 | 467 | 468 | 469 |
470 | 471 | 472 | 473 | 474 | 475 | 476 | 477 | 478 | 479 | 480 | 481 | 482 | 483 | 484 | 485 |
Returns:
486 | 487 | 488 |
489 |

[x1, y1, x2, y2, ... xn, yn]

490 |
491 | 492 | 493 | 494 |
495 |
496 | Type 497 |
498 |
499 | 500 | Array.<number> 501 | 502 | 503 |
504 |
505 | 506 | 507 | 508 | 509 | 510 | 511 | 512 | 513 | 514 |
515 | 516 | 517 | 518 | 519 | 520 | 521 | 522 | 523 | 524 | 525 | 526 | 527 | 528 | 529 | 530 | 531 | 532 | 533 | 534 | 535 |
536 | 537 |
538 | 539 | 540 | 541 | 542 |
543 | 544 | 547 | 548 |
549 | 550 |
551 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 552 |
553 | 554 | 555 | 556 | 557 | -------------------------------------------------------------------------------- /docs/jsdoc/module-shape-points_bezierCurveTo.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Module: shape-points/bezierCurveTo 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Module: shape-points/bezierCurveTo

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 | 29 |
30 | 31 | 32 | 33 | 34 | 35 |
36 | 37 |
38 |
39 | 40 | 41 |

Calculate points for a bezier curve with a starting point and two control points 42 | from https://stackoverflow.com/a/15399173/1955997

43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 |
Parameters:
59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 98 | 99 | 100 | 107 | 108 | 109 | 110 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 125 | 133 | 134 | 135 | 142 | 143 | 144 | 145 | 148 | 149 | 150 | 151 | 152 | 153 | 154 | 155 | 156 | 157 | 158 | 159 | 160 | 168 | 169 | 170 | 177 | 178 | 179 | 180 | 183 | 184 | 185 | 186 | 187 | 188 | 189 | 190 | 191 | 192 | 193 | 194 | 195 | 203 | 204 | 205 | 212 | 213 | 214 | 215 | 218 | 219 | 220 | 221 | 222 | 223 | 224 | 225 | 226 | 227 | 228 | 229 | 230 | 238 | 239 | 240 | 247 | 248 | 249 | 250 | 253 | 254 | 255 | 256 | 257 | 258 | 259 | 260 | 261 | 262 | 263 | 264 | 265 | 273 | 274 | 275 | 282 | 283 | 284 | 285 | 288 | 289 | 290 | 291 | 292 | 293 | 294 | 295 | 296 | 297 | 298 | 299 | 300 | 308 | 309 | 310 | 317 | 318 | 319 | 320 | 323 | 324 | 325 | 326 | 327 | 328 | 329 | 330 | 331 | 332 | 333 | 334 | 335 | 343 | 344 | 345 | 352 | 353 | 354 | 355 | 358 | 359 | 360 | 361 | 362 | 363 | 364 | 365 | 366 | 367 | 368 | 369 | 370 | 378 | 379 | 380 | 389 | 390 | 391 | 392 | 397 | 398 | 399 | 400 | 401 | 402 | 403 | 404 |
NameTypeAttributesDefaultDescription
x1 91 | 92 | 93 | number 94 | 95 | 96 | 97 | 101 | 102 | 103 | 104 | 105 | 106 | 111 | 112 |

starting point (usually a moveTo)

y1 126 | 127 | 128 | number 129 | 130 | 131 | 132 | 136 | 137 | 138 | 139 | 140 | 141 | 146 | 147 |

starting point

cp1x 161 | 162 | 163 | number 164 | 165 | 166 | 167 | 171 | 172 | 173 | 174 | 175 | 176 | 181 | 182 |

first control point

cp1y 196 | 197 | 198 | number 199 | 200 | 201 | 202 | 206 | 207 | 208 | 209 | 210 | 211 | 216 | 217 |

first control point

cp2x 231 | 232 | 233 | number 234 | 235 | 236 | 237 | 241 | 242 | 243 | 244 | 245 | 246 | 251 | 252 |

second control point

cp2y 266 | 267 | 268 | number 269 | 270 | 271 | 272 | 276 | 277 | 278 | 279 | 280 | 281 | 286 | 287 |

second control point

x2 301 | 302 | 303 | number 304 | 305 | 306 | 307 | 311 | 312 | 313 | 314 | 315 | 316 | 321 | 322 |

ending point

y2 336 | 337 | 338 | number 339 | 340 | 341 | 342 | 346 | 347 | 348 | 349 | 350 | 351 | 356 | 357 |

ending point

pointsInArc 371 | 372 | 373 | number 374 | 375 | 376 | 377 | 381 | 382 | <optional>
383 | 384 | 385 | 386 | 387 | 388 | 		393 | 394 | 5 395 | 396 |
405 | 406 | 407 | 408 | 409 | 410 | 411 |
412 | 413 | 414 | 415 | 416 | 417 | 418 | 419 | 420 | 421 | 422 | 423 | 424 | 425 | 426 | 427 | 428 | 429 | 430 | 431 | 432 | 433 | 434 | 435 | 436 | 437 | 438 |
Source:
439 |
442 | 443 | 444 | 445 | 446 | 447 | 448 | 449 |
450 | 451 | 452 | 453 | 454 | 455 | 456 | 457 | 458 | 459 | 460 | 461 | 462 | 463 | 464 | 465 |
Returns:
466 | 467 | 468 |
469 |

[x1, y1, x2, y2, ... xn, yn]

470 |
471 | 472 | 473 | 474 |
475 |
476 | Type 477 |
478 |
479 | 480 | array 481 | 482 | 483 |
484 |
485 | 486 | 487 | 488 | 489 | 490 | 491 | 492 | 493 | 494 |
495 | 496 | 497 | 498 | 499 | 500 | 501 | 502 | 503 | 504 | 505 | 506 | 507 | 508 | 509 | 510 | 511 | 512 | 513 | 514 | 515 |
516 | 517 |
518 | 519 | 520 | 521 | 522 |
523 | 524 | 527 | 528 |
529 | 530 |
531 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 532 |
533 | 534 | 535 | 536 | 537 | -------------------------------------------------------------------------------- /docs/jsdoc/module-shape-points_circle.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Module: shape-points/circle 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Module: shape-points/circle

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 | 29 |
30 | 31 | 32 | 33 | 34 | 35 |
36 | 37 |
38 |
39 | 40 | 41 |

calculate points for a circle (calculates using pointsInArc * 4)

42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 |
Parameters:
58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 97 | 98 | 99 | 106 | 107 | 108 | 109 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 132 | 133 | 134 | 141 | 142 | 143 | 144 | 147 | 148 | 149 | 150 | 151 | 152 | 153 | 154 | 155 | 156 | 157 | 158 | 159 | 167 | 168 | 169 | 176 | 177 | 178 | 179 | 182 | 183 | 184 | 185 | 186 | 187 | 188 | 189 | 190 | 191 | 192 | 193 | 194 | 202 | 203 | 204 | 213 | 214 | 215 | 216 | 221 | 222 | 223 | 224 | 225 | 226 | 227 | 228 |
NameTypeAttributesDefaultDescription
x 90 | 91 | 92 | number 93 | 94 | 95 | 96 | 100 | 101 | 102 | 103 | 104 | 105 | 110 | 111 |
y 125 | 126 | 127 | number 128 | 129 | 130 | 131 | 135 | 136 | 137 | 138 | 139 | 140 | 145 | 146 |
radius 160 | 161 | 162 | number 163 | 164 | 165 | 166 | 170 | 171 | 172 | 173 | 174 | 175 | 180 | 181 |
pointsInArc 195 | 196 | 197 | number 198 | 199 | 200 | 201 | 205 | 206 | <optional>
207 | 208 | 209 | 210 | 211 | 212 | 		217 | 218 | 5 219 | 220 |
229 | 230 | 231 | 232 | 233 | 234 | 235 |
236 | 237 | 238 | 239 | 240 | 241 | 242 | 243 | 244 | 245 | 246 | 247 | 248 | 249 | 250 | 251 | 252 | 253 | 254 | 255 | 256 | 257 | 258 | 259 | 260 | 261 | 262 |
Source:
263 |
266 | 267 | 268 | 269 | 270 | 271 | 272 | 273 |
274 | 275 | 276 | 277 | 278 | 279 | 280 | 281 | 282 | 283 | 284 | 285 | 286 | 287 | 288 | 289 |
Returns:
290 | 291 | 292 |
293 |

[x1, y1, x2, y2, ... xn, yn]

294 |
295 | 296 | 297 | 298 |
299 |
300 | Type 301 |
302 |
303 | 304 | array 305 | 306 | 307 |
308 |
309 | 310 | 311 | 312 | 313 | 314 | 315 | 316 | 317 | 318 |
319 | 320 | 321 | 322 | 323 | 324 | 325 | 326 | 327 | 328 | 329 | 330 | 331 | 332 | 333 | 334 | 335 | 336 | 337 | 338 | 339 |
340 | 341 |
342 | 343 | 344 | 345 | 346 |
347 | 348 | 351 | 352 |
353 | 354 |
355 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 356 |
357 | 358 | 359 | 360 | 361 | -------------------------------------------------------------------------------- /docs/jsdoc/module-shape-points_ellipse.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Module: shape-points/ellipse 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Module: shape-points/ellipse

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 | 29 |
30 | 31 | 32 | 33 | 34 | 35 |
36 | 37 |
38 |
39 | 40 | 41 |

calculate points for a ellipse (calculates using pointsInArc * 4)

42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 |
Parameters:
58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 97 | 98 | 99 | 106 | 107 | 108 | 109 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 132 | 133 | 134 | 141 | 142 | 143 | 144 | 147 | 148 | 149 | 150 | 151 | 152 | 153 | 154 | 155 | 156 | 157 | 158 | 159 | 167 | 168 | 169 | 176 | 177 | 178 | 179 | 182 | 183 | 184 | 185 | 186 | 187 | 188 | 189 | 190 | 191 | 192 | 193 | 194 | 202 | 203 | 204 | 211 | 212 | 213 | 214 | 217 | 218 | 219 | 220 | 221 | 222 | 223 | 224 | 225 | 226 | 227 | 228 | 229 | 237 | 238 | 239 | 248 | 249 | 250 | 251 | 256 | 257 | 258 | 259 | 260 | 261 | 262 | 263 |
NameTypeAttributesDefaultDescription
x 90 | 91 | 92 | number 93 | 94 | 95 | 96 | 100 | 101 | 102 | 103 | 104 | 105 | 110 | 111 |
y 125 | 126 | 127 | number 128 | 129 | 130 | 131 | 135 | 136 | 137 | 138 | 139 | 140 | 145 | 146 |
rx 160 | 161 | 162 | number 163 | 164 | 165 | 166 | 170 | 171 | 172 | 173 | 174 | 175 | 180 | 181 |
ry 195 | 196 | 197 | number 198 | 199 | 200 | 201 | 205 | 206 | 207 | 208 | 209 | 210 | 215 | 216 |
pointsInArc 230 | 231 | 232 | number 233 | 234 | 235 | 236 | 240 | 241 | <optional>
242 | 243 | 244 | 245 | 246 | 247 | 		252 | 253 | 5 254 | 255 |
264 | 265 | 266 | 267 | 268 | 269 | 270 |
271 | 272 | 273 | 274 | 275 | 276 | 277 | 278 | 279 | 280 | 281 | 282 | 283 | 284 | 285 | 286 | 287 | 288 | 289 | 290 | 291 | 292 | 293 | 294 | 295 | 296 | 297 |
Source:
298 |
301 | 302 | 303 | 304 | 305 | 306 | 307 | 308 |
309 | 310 | 311 | 312 | 313 | 314 | 315 | 316 | 317 | 318 | 319 | 320 | 321 | 322 | 323 | 324 |
Returns:
325 | 326 | 327 |
328 |

[x1, y1, x2, y2, ... xn, yn]

329 |
330 | 331 | 332 | 333 |
334 |
335 | Type 336 |
337 |
338 | 339 | array 340 | 341 | 342 |
343 |
344 | 345 | 346 | 347 | 348 | 349 | 350 | 351 | 352 | 353 |
354 | 355 | 356 | 357 | 358 | 359 | 360 | 361 | 362 | 363 | 364 | 365 | 366 | 367 | 368 | 369 | 370 | 371 | 372 | 373 | 374 |
375 | 376 |
377 | 378 | 379 | 380 | 381 |
382 | 383 | 386 | 387 |
388 | 389 |
390 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 391 |
392 | 393 | 394 | 395 | 396 | -------------------------------------------------------------------------------- /docs/jsdoc/module-shape-points_line.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Module: shape-points/line 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Module: shape-points/line

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 | 29 |
30 | 31 | 32 | 33 | 34 | 35 |
36 | 37 |
38 |
39 | 40 | 41 |

calculate points for a line with a certain thickness (either one thickness or a starting and ending thickness)

42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 |
Parameters:
58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 95 | 96 | 97 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 126 | 127 | 128 | 135 | 136 | 137 | 138 | 139 | 140 | 141 | 142 | 143 | 144 | 145 | 146 | 147 | 148 | 149 | 157 | 158 | 159 | 166 | 167 | 168 | 169 | 170 | 171 | 172 | 173 | 174 | 175 | 176 | 177 | 178 | 179 | 180 | 188 | 189 | 190 | 197 | 198 | 199 | 200 | 201 | 202 | 203 | 204 | 205 | 206 | 207 | 208 | 209 | 210 | 211 | 222 | 223 | 224 | 233 | 234 | 235 | 236 | 237 | 310 | 311 | 312 | 313 | 314 |
NameTypeAttributesDescription
x1 88 | 89 | 90 | number 91 | 92 | 93 | 94 | 98 | 99 | 100 | 101 | 102 | 103 |
y1 119 | 120 | 121 | number 122 | 123 | 124 | 125 | 129 | 130 | 131 | 132 | 133 | 134 |
x2 150 | 151 | 152 | number 153 | 154 | 155 | 156 | 160 | 161 | 162 | 163 | 164 | 165 |
y2 181 | 182 | 183 | number 184 | 185 | 186 | 187 | 191 | 192 | 193 | 194 | 195 | 196 |
thickness 212 | 213 | 214 | number 215 | | 216 | 217 | object 218 | 219 | 220 | 221 | 225 | 226 | <optional>
227 | 228 | 229 | 230 | 231 | 232 | 		238 |
Properties
239 | 240 | 241 | 242 | 243 | 244 | 245 | 246 | 247 | 248 | 249 | 250 | 251 | 252 | 253 | 254 | 255 | 256 | 257 | 258 | 259 | 260 | 261 | 262 | 263 | 264 | 265 | 266 | 274 | 275 | 276 | 277 | 278 | 279 | 280 | 281 | 282 | 283 | 284 | 285 | 286 | 287 | 288 | 289 | 297 | 298 | 299 | 300 | 301 | 302 | 303 | 304 | 305 | 306 | 307 |
NameTypeDescription
start 267 | 268 | 269 | number 270 | 271 | 272 | 273 |
end 290 | 291 | 292 | number 293 | 294 | 295 | 296 |
308 | 309 |
315 | 316 | 317 | 318 | 319 | 320 | 321 |
322 | 323 | 324 | 325 | 326 | 327 | 328 | 329 | 330 | 331 | 332 | 333 | 334 | 335 | 336 | 337 | 338 | 339 | 340 | 341 | 342 | 343 | 344 | 345 | 346 | 347 | 348 |
Source:
349 |
352 | 353 | 354 | 355 | 356 | 357 | 358 | 359 |
360 | 361 | 362 | 363 | 364 | 365 | 366 | 367 | 368 | 369 | 370 | 371 | 372 | 373 | 374 | 375 |
Returns:
376 | 377 | 378 |
379 |

[x1, y1, x2, y2, ... xn, yn]

380 |
381 | 382 | 383 | 384 |
385 |
386 | Type 387 |
388 |
389 | 390 | array 391 | 392 | 393 |
394 |
395 | 396 | 397 | 398 | 399 | 400 | 401 | 402 | 403 | 404 |
405 | 406 | 407 | 408 | 409 | 410 | 411 | 412 | 413 | 414 | 415 | 416 | 417 | 418 | 419 | 420 | 421 | 422 | 423 | 424 | 425 |
426 | 427 |
428 | 429 | 430 | 431 | 432 |
433 | 434 | 437 | 438 |
439 | 440 |
441 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 442 |
443 | 444 | 445 | 446 | 447 | -------------------------------------------------------------------------------- /docs/jsdoc/module-shape-points_quadraticCurveTo.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Module: shape-points/quadraticCurveTo 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Module: shape-points/quadraticCurveTo

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 | 29 |
30 | 31 | 32 | 33 | 34 | 35 |
36 | 37 |
38 |
39 | 40 | 41 |

calculate points in a quadratic curve

42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 |
Parameters:
58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 125 | 126 | 127 | 128 | 129 | 130 | 131 | 139 | 140 | 141 | 142 | 143 | 144 | 145 | 146 | 147 | 148 | 149 | 150 | 151 | 152 | 153 | 154 | 162 | 163 | 164 | 165 | 166 | 167 | 168 | 169 | 170 | 171 | 172 | 173 | 174 | 175 | 176 | 177 | 185 | 186 | 187 | 188 | 189 | 190 | 191 | 192 | 193 | 194 | 195 | 196 | 197 | 198 | 199 | 200 | 208 | 209 | 210 | 211 | 212 | 213 | 214 | 215 | 216 | 217 | 218 |
NameTypeDescription
x1 86 | 87 | 88 | number 89 | 90 | 91 | 92 |

starting point

y1 109 | 110 | 111 | number 112 | 113 | 114 | 115 |
cp1x 132 | 133 | 134 | number 135 | 136 | 137 | 138 |

control point

cp1y 155 | 156 | 157 | number 158 | 159 | 160 | 161 |
x2 178 | 179 | 180 | number 181 | 182 | 183 | 184 |

ending point

y2 201 | 202 | 203 | number 204 | 205 | 206 | 207 |
219 | 220 | 221 | 222 | 223 | 224 | 225 |
226 | 227 | 228 | 229 | 230 | 231 | 232 | 233 | 234 | 235 | 236 | 237 | 238 | 239 | 240 | 241 | 242 | 243 | 244 | 245 | 246 | 247 | 248 | 249 | 250 | 251 | 252 |
Source:
253 |
256 | 257 | 258 | 259 | 260 | 261 | 262 | 263 |
264 | 265 | 266 | 267 | 268 | 269 | 270 | 271 | 272 | 273 | 274 | 275 | 276 | 277 | 278 | 279 |
Returns:
280 | 281 | 282 |
283 |

[x1, y1, x2, y2, ... xn, yn]

284 |
285 | 286 | 287 | 288 |
289 |
290 | Type 291 |
292 |
293 | 294 | array 295 | 296 | 297 |
298 |
299 | 300 | 301 | 302 | 303 | 304 | 305 | 306 | 307 | 308 |
309 | 310 | 311 | 312 | 313 | 314 | 315 | 316 | 317 | 318 | 319 | 320 | 321 | 322 | 323 | 324 | 325 | 326 | 327 | 328 | 329 |
330 | 331 |
332 | 333 | 334 | 335 | 336 |
337 | 338 | 341 | 342 |
343 | 344 |
345 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 346 |
347 | 348 | 349 | 350 | 351 | -------------------------------------------------------------------------------- /docs/jsdoc/module-shape-points_rect.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Module: shape-points/rect 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Module: shape-points/rect

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 | 29 |
30 | 31 | 32 | 33 | 34 | 35 |
36 | 37 |
38 |
39 | 40 | 41 |

calculate points for rectangle

42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 |
Parameters:
58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 125 | 126 | 127 | 128 | 129 | 130 | 131 | 139 | 140 | 141 | 142 | 143 | 144 | 145 | 146 | 147 | 148 | 149 | 150 | 151 | 152 | 153 | 154 | 162 | 163 | 164 | 165 | 166 | 167 | 168 | 169 | 170 | 171 | 172 |
NameTypeDescription
x 86 | 87 | 88 | number 89 | 90 | 91 | 92 |

(center)

y 109 | 110 | 111 | number 112 | 113 | 114 | 115 |
width 132 | 133 | 134 | number 135 | 136 | 137 | 138 |
height 155 | 156 | 157 | number 158 | 159 | 160 | 161 |
173 | 174 | 175 | 176 | 177 | 178 | 179 |
180 | 181 | 182 | 183 | 184 | 185 | 186 | 187 | 188 | 189 | 190 | 191 | 192 | 193 | 194 | 195 | 196 | 197 | 198 | 199 | 200 | 201 | 202 | 203 | 204 | 205 | 206 |
Source:
207 |
210 | 211 | 212 | 213 | 214 | 215 | 216 | 217 |
218 | 219 | 220 | 221 | 222 | 223 | 224 | 225 | 226 | 227 | 228 | 229 | 230 | 231 | 232 | 233 |
Returns:
234 | 235 | 236 |
237 |

[x1, y1, x2, y2, ... xn, yn]

238 |
239 | 240 | 241 | 242 |
243 |
244 | Type 245 |
246 |
247 | 248 | array 249 | 250 | 251 |
252 |
253 | 254 | 255 | 256 | 257 | 258 | 259 | 260 | 261 | 262 |
263 | 264 | 265 | 266 | 267 | 268 | 269 | 270 | 271 | 272 | 273 | 274 | 275 | 276 | 277 | 278 | 279 | 280 | 281 | 282 | 283 |
284 | 285 |
286 | 287 | 288 | 289 | 290 |
291 | 292 | 295 | 296 |
297 | 298 |
299 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 300 |
301 | 302 | 303 | 304 | 305 | -------------------------------------------------------------------------------- /docs/jsdoc/module-shape-points_roundedRect.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Module: shape-points/roundedRect 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Module: shape-points/roundedRect

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 | 29 |
30 | 31 | 32 | 33 | 34 | 35 |
36 | 37 |
38 |
39 | 40 | 41 |

calculate points for a rounded rectangle with one corner radius, or 4 separate corner radii

42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 |
Parameters:
58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 97 | 98 | 99 | 106 | 107 | 108 | 109 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 132 | 133 | 134 | 141 | 142 | 143 | 144 | 147 | 148 | 149 | 150 | 151 | 152 | 153 | 154 | 155 | 156 | 157 | 158 | 159 | 167 | 168 | 169 | 176 | 177 | 178 | 179 | 182 | 183 | 184 | 185 | 186 | 187 | 188 | 189 | 190 | 191 | 192 | 193 | 194 | 202 | 203 | 204 | 211 | 212 | 213 | 214 | 217 | 218 | 219 | 220 | 221 | 222 | 223 | 224 | 225 | 226 | 227 | 228 | 229 | 240 | 241 | 242 | 249 | 250 | 251 | 252 | 255 | 256 | 257 | 418 | 419 | 420 | 421 | 422 | 423 | 424 | 425 | 426 | 427 | 435 | 436 | 437 | 446 | 447 | 448 | 449 | 454 | 455 | 456 | 457 | 458 | 459 | 460 | 461 |
NameTypeAttributesDefaultDescription
x 90 | 91 | 92 | number 93 | 94 | 95 | 96 | 100 | 101 | 102 | 103 | 104 | 105 | 110 | 111 |

(center)

y 125 | 126 | 127 | number 128 | 129 | 130 | 131 | 135 | 136 | 137 | 138 | 139 | 140 | 145 | 146 |
width 160 | 161 | 162 | number 163 | 164 | 165 | 166 | 170 | 171 | 172 | 173 | 174 | 175 | 180 | 181 |
height 195 | 196 | 197 | number 198 | 199 | 200 | 201 | 205 | 206 | 207 | 208 | 209 | 210 | 215 | 216 |
radius 230 | 231 | 232 | number 233 | | 234 | 235 | object 236 | 237 | 238 | 239 | 243 | 244 | 245 | 246 | 247 | 248 | 253 | 254 | 258 |
Properties
259 | 260 | 261 | 262 | 263 | 264 | 265 | 266 | 267 | 268 | 269 | 270 | 271 | 272 | 273 | 274 | 275 | 276 | 277 | 278 | 279 | 280 | 281 | 282 | 283 | 284 | 285 | 286 | 287 | 288 | 296 | 297 | 298 | 307 | 308 | 309 | 310 | 311 | 312 | 313 | 314 | 315 | 316 | 317 | 318 | 319 | 320 | 321 | 329 | 330 | 331 | 340 | 341 | 342 | 343 | 344 | 345 | 346 | 347 | 348 | 349 | 350 | 351 | 352 | 353 | 354 | 362 | 363 | 364 | 373 | 374 | 375 | 376 | 377 | 378 | 379 | 380 | 381 | 382 | 383 | 384 | 385 | 386 | 387 | 395 | 396 | 397 | 406 | 407 | 408 | 409 | 410 | 411 | 412 | 413 | 414 | 415 |
NameTypeAttributesDescription
topLeft 289 | 290 | 291 | number 292 | 293 | 294 | 295 | 299 | 300 | <optional>
301 | 302 | 303 | 304 | 305 | 306 |
topRight 322 | 323 | 324 | number 325 | 326 | 327 | 328 | 332 | 333 | <optional>
334 | 335 | 336 | 337 | 338 | 339 |
bottomLeft 355 | 356 | 357 | number 358 | 359 | 360 | 361 | 365 | 366 | <optional>
367 | 368 | 369 | 370 | 371 | 372 |
bottomRight 388 | 389 | 390 | number 391 | 392 | 393 | 394 | 398 | 399 | <optional>
400 | 401 | 402 | 403 | 404 | 405 |
416 | 417 |
pointsInArc 428 | 429 | 430 | number 431 | 432 | 433 | 434 | 438 | 439 | <optional>
440 | 441 | 442 | 443 | 444 | 445 | 		450 | 451 | 5 452 | 453 |
462 | 463 | 464 | 465 | 466 | 467 | 468 |
469 | 470 | 471 | 472 | 473 | 474 | 475 | 476 | 477 | 478 | 479 | 480 | 481 | 482 | 483 | 484 | 485 | 486 | 487 | 488 | 489 | 490 | 491 | 492 | 493 | 494 | 495 |
Source:
496 |
499 | 500 | 501 | 502 | 503 | 504 | 505 | 506 |
507 | 508 | 509 | 510 | 511 | 512 | 513 | 514 | 515 | 516 | 517 | 518 | 519 | 520 | 521 | 522 |
Returns:
523 | 524 | 525 |
526 |

[x1, y1, x2, y2, ... xn, yn]

527 |
528 | 529 | 530 | 531 |
532 |
533 | Type 534 |
535 |
536 | 537 | array 538 | 539 | 540 |
541 |
542 | 543 | 544 | 545 | 546 | 547 | 548 | 549 | 550 | 551 |
552 | 553 | 554 | 555 | 556 | 557 | 558 | 559 | 560 | 561 | 562 | 563 | 564 | 565 | 566 | 567 | 568 | 569 | 570 | 571 | 572 |
573 | 574 |
575 | 576 | 577 | 578 | 579 |
580 | 581 | 584 | 585 |
586 | 587 |
588 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 589 |
590 | 591 | 592 | 593 | 594 | -------------------------------------------------------------------------------- /docs/jsdoc/quadraticCurveTo.js.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Source: quadraticCurveTo.js 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Source: quadraticCurveTo.js

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 |
29 | 
/**
30 |  * calculate points in a quadratic curve
31 |  * @module shape-points/quadraticCurveTo
32 |  * @param {number} x1 - starting point
33 |  * @param {number} y1
34 |  * @param {number} cp1x - control point
35 |  * @param {number} cp1y
36 |  * @param {number} x2 - ending point
37 |  * @param {number} y2
38 |  * @returns {array} [x1, y1, x2, y2, ... xn, yn]
39 |  */
40 | export function quadraticCurveTo(x1, y1, cp1x, cp1y, x2, y2, pointsInArc)
41 | {
42 |     pointsInArc = pointsInArc || 5
43 |     const points = []
44 |     const interval = 1 / pointsInArc
45 |     for (let t = 0; t <= 1; t += interval)
46 |     {
47 |         const B0_t = Math.pow(1 - t, 2),
48 |             B1_t = 2 * t * (1 - t),
49 |             B2_t = Math.pow(t, 2)
50 | 
51 |         points.push(
52 |             (B0_t * x1) + (B1_t * cp1x) + (B2_t * x2),
53 |             (B0_t * y1) + (B1_t * cp1y) + (B2_t * y2)
54 |         )
55 |     }
56 |     return points
57 | }
58 |
59 |
60 | 61 | 62 | 63 | 64 |
65 | 66 | 69 | 70 |
71 | 72 |
73 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 74 |
75 | 76 | 77 | 78 | 79 | 80 | -------------------------------------------------------------------------------- /docs/jsdoc/rect.js.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Source: rect.js 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Source: rect.js

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 |
29 | 
/**
30 |  * calculate points for rectangle
31 |  * @module shape-points/rect
32 |  * @param {number} x (center)
33 |  * @param {number} y
34 |  * @param {number} width
35 |  * @param {number} height
36 |  * @returns {array} [x1, y1, x2, y2, ... xn, yn]
37 |  */
38 | export function rect(x, y, width, height)
39 | {
40 |     return [
41 |         x - width / 2, y - height / 2,
42 |         x + width / 2, y - height / 2,
43 |         x + width / 2, y + height / 2,
44 |         x - width / 2, y + height / 2
45 |     ]
46 | }
47 |
48 |
49 | 50 | 51 | 52 | 53 |
54 | 55 | 58 | 59 |
60 | 61 |
62 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 63 |
64 | 65 | 66 | 67 | 68 | 69 | -------------------------------------------------------------------------------- /docs/jsdoc/roundedRect.js.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | JSDoc: Source: roundedRect.js 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 |

Source: roundedRect.js

21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 |
29 | 
import { arc } from './arc'
 30 | 
 31 | /**
 32 |  * calculate points for a rounded rectangle with one corner radius, or 4 separate corner radii
 33 |  * @module shape-points/roundedRect
 34 |  * @param {number} x (center)
 35 |  * @param {number} y
 36 |  * @param {number} width
 37 |  * @param {number} height
 38 |  * @param {(number|object)} radius
 39 |  * @param {number} [radius.topLeft]
 40 |  * @param {number} [radius.topRight]
 41 |  * @param {number} [radius.bottomLeft]
 42 |  * @param {number} [radius.bottomRight]
 43 |  * @param {number} [pointsInArc=5]
 44 |  * @returns {array} [x1, y1, x2, y2, ... xn, yn]
 45 |  */
 46 | export function roundedRect(x, y, width, height, radius, pointsInArc)
 47 | {
 48 |     pointsInArc = pointsInArc || 5
 49 |     if (isNaN(radius))
 50 |     {
 51 |         radius.topLeft = radius.topLeft || 0
 52 |         radius.topRight = radius.topRight || 0
 53 |         radius.bottomLeft = radius.bottomLeft || 0
 54 |         radius.bottomRight = radius.bottomRight || 0
 55 |         const points = [
 56 |             x - width / 2 + radius.topLeft, y - height / 2,
 57 |             x + width / 2 - radius.topRight, y - height / 2
 58 |         ]
 59 |         if (radius.topRight)
 60 |         {
 61 |             points.push(...arc(x + width / 2 - radius.topRight, y - height / 2 + radius.topRight, 3 * Math.PI / 2, Math.PI * 2, radius.topRight, pointsInArc))
 62 |         }
 63 |         points.push(
 64 |             x + width / 2, y - height / 2 + radius.topRight,
 65 |             x + width / 2, y + height / 2 - radius.bottomRight
 66 |         )
 67 |         if (radius.bottomRight)
 68 |         {
 69 |             points.push(...arc(x + width / 2 - radius.bottomRight, y + height / 2 - radius.bottomRight, 0, Math.PI / 2, radius.bottomRight, pointsInArc))
 70 |         }
 71 |         points.push(
 72 |             x + width / 2 - radius.bottomRight, y + height / 2,
 73 |             x - width / 2 + radius.bottomLeft, y + height / 2
 74 |         )
 75 |         if (radius.bottomLeft)
 76 |         {
 77 |             points.push(...arc(x - width / 2 + radius.bottomLeft, y + height / 2 - radius.bottomLeft, Math.PI / 2, Math.PI, radius.bottomLeft, pointsInArc))
 78 |         }
 79 |         points.push(
 80 |             x - width / 2, y + height / 2 - radius.bottomLeft,
 81 |             x - width / 2, y - height / 2 + radius.topLeft
 82 |         )
 83 |         if (radius.topLeft)
 84 |         {
 85 |             points.push(...arc(x - width / 2 + radius.topLeft, y - height / 2 + radius.topLeft, Math.PI, 3 * Math.PI / 2, radius.topLeft, pointsInArc))
 86 |         }
 87 |         return points
 88 |     }
 89 |     return [
 90 |         x - width / 2 + radius, y - height / 2,
 91 |         x + width / 2 - radius, y - height / 2,
 92 |         ...arc(x + width / 2 - radius, y - height / 2 + radius, 3 * Math.PI / 2, 2 * Math.PI, radius, pointsInArc),
 93 |         x + width / 2, y - height / 2 + radius,
 94 |         x + width / 2, y + height / 2 - radius,
 95 |         ...arc(x + width / 2 - radius, y + height / 2 - radius, 0, Math.PI / 2, radius, pointsInArc),
 96 |         x + width / 2 - radius, y + height / 2,
 97 |         x - width / 2 + radius, y + height / 2,
 98 |         ...arc(x - width / 2 + radius, y + height / 2 - radius, Math.PI / 2, Math.PI, radius, pointsInArc),
 99 |         x - width / 2, y + height / 2 - radius,
100 |         x - width / 2, y - height / 2 + radius,
101 |         ...arc(x - width / 2 + radius, y - height / 2 + radius, Math.PI, 3 * Math.PI / 2, radius, pointsInArc),
102 |     ]
103 | }
104 |
105 |
106 | 107 | 108 | 109 | 110 |
111 | 112 | 115 | 116 |
117 | 118 |
119 | Documentation generated by JSDoc 3.6.10 on Tue Mar 29 2022 14:31:03 GMT-0700 (Pacific Daylight Time) 120 |
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k=k.match(g),f,b;if(b= 26 | !k){b=n;for(var o=void 0,c=b.firstChild;c;c=c.nextSibling)var i=c.nodeType,o=i===1?o?b:c:i===3?N.test(c.nodeValue)?b:o:o;b=(f=o===b?void 0:o)&&"CODE"===f.tagName}b&&(k=f.className.match(g));k&&(k=k[1]);b=!1;for(o=n.parentNode;o;o=o.parentNode)if((o.tagName==="pre"||o.tagName==="code"||o.tagName==="xmp")&&o.className&&o.className.indexOf("prettyprint")>=0){b=!0;break}b||((b=(b=n.className.match(/\blinenums\b(?::(\d+))?/))?b[1]&&b[1].length?+b[1]:!0:!1)&&D(n,b),d={g:k,h:n,i:b},E(d))}}p 2 | 3 | 4 | 5 | JSDoc: Module: arc 6 | 7 | 8 | 9 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
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Module: arc

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calculate points for arc

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123 | Documentation generated by JSDoc 3.6.3 on Sat Sep 14 2019 08:58:02 GMT+0800 (Taipei Standard Time) 124 |
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rx * Math.sin(i), y - ry * Math.cos(i)) 19 | } 20 | return points 21 | } 22 | 23 | -------------------------------------------------------------------------------- /index.js: -------------------------------------------------------------------------------- 1 | /** @module shape-points */ 2 | 3 | export { rect } from './rect' 4 | export { arc } from './arc' 5 | export { roundedRect } from './roundedRect' 6 | export { line } from './line' 7 | export { circle } from './circle' 8 | export { ellipse } from './ellipse' 9 | export { bezierCurveTo } from './bezierCurveTo' 10 | export { bezierCurveThrough } from './bezierCurveThrough' 11 | export { quadraticCurveTo } from './quadraticCurveTo' -------------------------------------------------------------------------------- /line.js: -------------------------------------------------------------------------------- 1 | /** 2 | * calculate points for a line with a certain thickness (either one thickness or a starting and ending thickness) 3 | * @module shape-points/line 4 | * @param {number} x1 5 | * @param {number} y1 6 | * @param {number} x2 7 | * @param {number} y2 8 | * @param {number|object} [thickness] 9 | * @param {number} thickness.start 10 | * @param {number} thickness.end 11 | * @returns {array} [x1, y1, x2, y2, ... xn, yn] 12 | */ 13 | export function line(x1, y1, x2, y2, thickness) 14 | { 15 | thickness = thickness || 0 16 | const angle = Math.atan2(y2 - y1, x2 - x1) 17 | const perp = angle - Math.PI / 2 18 | const half = isNaN(thickness) ? { start: thickness.start / 2, end: thickness.end / 2 } : { start: thickness / 2, end: thickness / 2 } 19 | return [ 20 | x1 - Math.cos(perp) * half.start, y1 - Math.sin(perp) * half.start, 21 | x2 - Math.cos(perp) * half.end, y2 - Math.sin(perp) * half.end, 22 | x2 + Math.cos(perp) * half.end, y2 + Math.sin(perp) * half.end, 23 | x1 + Math.cos(perp) * half.start, y1 + Math.sin(perp) * half.start 24 | ] 25 | } 26 | 27 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "shape-points", 3 | "version": "3.0.4", 4 | "description": "Generate points for simple shapes and curves: arcs, rectangles, rounded rectangles, circles, ellipses, bezierCurveTo, bezierCurveThrough (i.e., bezier curves through specific points)", 5 | "main": "dist/shape-points.js", 6 | "module": "dist/shape-points.es.js", 7 | "directories": { 8 | "doc": "docs" 9 | }, 10 | "scripts": { 11 | "test": "rollup -c docs/rollup.dev.js --watch", 12 | "build": "rollup -c rollup.config.js", 13 | "build-demo": "rollup -c docs/rollup.config.js", 14 | "docs": "jsdoc -c .jsdoc.json", 15 | "prepublishOnly": "yarn build && yarn build-demo && yarn docs" 16 | }, 17 | "repository": { 18 | "type": "git", 19 | "url": "git+https://github.com/davidfig/shape-points.git" 20 | }, 21 | "keywords": [ 22 | "coordinates", 23 | "shapes", 24 | "geometry", 25 | "points", 26 | "rounded rectangle", 27 | "line", 28 | "arc", 29 | "circle", 30 | "ellipse", 31 | "bezier", 32 | "bezierCurveTo" 33 | ], 34 | "author": "David Figatner", 35 | "license": "MIT", 36 | "bugs": { 37 | "url": "https://github.com/davidfig/shape-points/issues" 38 | }, 39 | "homepage": "https://github.com/davidfig/shape-points#readme", 40 | "devDependencies": { 41 | "fork-me-github": "^1.2.0", 42 | "highlight.js": "^9.12.0", 43 | "jsdoc": "^3.6.3", 44 | "markdown-api": "^1.1.3", 45 | "rollup": "^1.21.2", 46 | "rollup-plugin-commonjs": "^10.1.0", 47 | "rollup-plugin-node-resolve": "^5.2.0", 48 | "rollup-plugin-serve": "^1.0.1", 49 | "rollup-plugin-terser": "^5.1.2" 50 | }, 51 | "dependencies": { 52 | "fit-curve": "^0.1.6" 53 | } 54 | } 55 | -------------------------------------------------------------------------------- /quadraticCurveTo.js: -------------------------------------------------------------------------------- 1 | /** 2 | * calculate points in a quadratic curve 3 | * @module shape-points/quadraticCurveTo 4 | * @param {number} x1 - starting point 5 | * @param {number} y1 6 | * @param {number} cp1x - control point 7 | * @param {number} cp1y 8 | * @param {number} x2 - ending point 9 | * @param {number} y2 10 | * @returns {array} [x1, y1, x2, y2, ... xn, yn] 11 | */ 12 | export function quadraticCurveTo(x1, y1, cp1x, cp1y, x2, y2, pointsInArc) 13 | { 14 | pointsInArc = pointsInArc || 5 15 | const points = [] 16 | const interval = 1 / pointsInArc 17 | for (let t = 0; t <= 1; t += interval) 18 | { 19 | const B0_t = Math.pow(1 - t, 2), 20 | B1_t = 2 * t * (1 - t), 21 | B2_t = Math.pow(t, 2) 22 | 23 | points.push( 24 | (B0_t * x1) + (B1_t * cp1x) + (B2_t * x2), 25 | (B0_t * y1) + (B1_t * cp1y) + (B2_t * y2) 26 | ) 27 | } 28 | return points 29 | } -------------------------------------------------------------------------------- /rect.js: -------------------------------------------------------------------------------- 1 | /** 2 | * calculate points for rectangle 3 | * @module shape-points/rect 4 | * @param {number} x (center) 5 | * @param {number} y 6 | * @param {number} width 7 | * @param {number} height 8 | * @returns {array} [x1, y1, x2, y2, ... xn, yn] 9 | */ 10 | export function rect(x, y, width, height) 11 | { 12 | return [ 13 | x - width / 2, y - height / 2, 14 | x + width / 2, y - height / 2, 15 | x + width / 2, y + height / 2, 16 | x - width / 2, y + height / 2 17 | ] 18 | } -------------------------------------------------------------------------------- /rollup.config.js: -------------------------------------------------------------------------------- 1 | import { terser } from 'rollup-plugin-terser' 2 | import resolve from 'rollup-plugin-node-resolve' 3 | import commonjs from 'rollup-plugin-commonjs' 4 | 5 | export default [ 6 | { 7 | input: 'index.js', 8 | plugins: [ 9 | resolve( 10 | { 11 | preferBuiltins: false 12 | }), 13 | commonjs(), 14 | terser() 15 | ], 16 | output: 17 | { 18 | file: 'dist/shape-points.js', 19 | format: 'umd', 20 | name: 'ShapePoints', 21 | sourcemap: true 22 | } 23 | }, 24 | { 25 | input: 'index.js', 26 | plugins: [ 27 | resolve( 28 | { 29 | preferBuiltins: false 30 | }), 31 | commonjs() 32 | ], 33 | output: 34 | { 35 | file: 'dist/shape-points.es.js', 36 | format: 'esm', 37 | sourcemap: true 38 | } 39 | }] -------------------------------------------------------------------------------- /roundedRect.js: -------------------------------------------------------------------------------- 1 | import { arc } from './arc' 2 | 3 | /** 4 | * calculate points for a rounded rectangle with one corner radius, or 4 separate corner radii 5 | * @module shape-points/roundedRect 6 | * @param {number} x (center) 7 | * @param {number} y 8 | * @param {number} width 9 | * @param {number} height 10 | * @param {(number|object)} radius 11 | * @param {number} [radius.topLeft] 12 | * @param {number} [radius.topRight] 13 | * @param {number} [radius.bottomLeft] 14 | * @param {number} [radius.bottomRight] 15 | * @param {number} [pointsInArc=5] 16 | * @returns {array} [x1, y1, x2, y2, ... xn, yn] 17 | */ 18 | export function roundedRect(x, y, width, height, radius, pointsInArc) 19 | { 20 | pointsInArc = pointsInArc || 5 21 | if (isNaN(radius)) 22 | { 23 | radius.topLeft = radius.topLeft || 0 24 | radius.topRight = radius.topRight || 0 25 | radius.bottomLeft = radius.bottomLeft || 0 26 | radius.bottomRight = radius.bottomRight || 0 27 | const points = [ 28 | x - width / 2 + radius.topLeft, y - height / 2, 29 | x + width / 2 - radius.topRight, y - height / 2 30 | ] 31 | if (radius.topRight) 32 | { 33 | points.push(...arc(x + width / 2 - radius.topRight, y - height / 2 + radius.topRight, 3 * Math.PI / 2, Math.PI * 2, radius.topRight, pointsInArc)) 34 | } 35 | points.push( 36 | x + width / 2, y - height / 2 + radius.topRight, 37 | x + width / 2, y + height / 2 - radius.bottomRight 38 | ) 39 | if (radius.bottomRight) 40 | { 41 | points.push(...arc(x + width / 2 - radius.bottomRight, y + height / 2 - radius.bottomRight, 0, Math.PI / 2, radius.bottomRight, pointsInArc)) 42 | } 43 | points.push( 44 | x + width / 2 - radius.bottomRight, y + height / 2, 45 | x - width / 2 + radius.bottomLeft, y + height / 2 46 | ) 47 | if (radius.bottomLeft) 48 | { 49 | points.push(...arc(x - width / 2 + radius.bottomLeft, y + height / 2 - radius.bottomLeft, Math.PI / 2, Math.PI, radius.bottomLeft, pointsInArc)) 50 | } 51 | points.push( 52 | x - width / 2, y + height / 2 - radius.bottomLeft, 53 | x - width / 2, y - height / 2 + radius.topLeft 54 | ) 55 | if (radius.topLeft) 56 | { 57 | points.push(...arc(x - width / 2 + radius.topLeft, y - height / 2 + radius.topLeft, Math.PI, 3 * Math.PI / 2, radius.topLeft, pointsInArc)) 58 | } 59 | return points 60 | } 61 | return [ 62 | x - width / 2 + radius, y - height / 2, 63 | x + width / 2 - radius, y - height / 2, 64 | ...arc(x + width / 2 - radius, y - height / 2 + radius, 3 * Math.PI / 2, 2 * Math.PI, radius, pointsInArc), 65 | x + width / 2, y - height / 2 + radius, 66 | x + width / 2, y + height / 2 - radius, 67 | ...arc(x + width / 2 - radius, y + height / 2 - radius, 0, Math.PI / 2, radius, pointsInArc), 68 | x + width / 2 - radius, y + height / 2, 69 | x - width / 2 + radius, y + height / 2, 70 | ...arc(x - width / 2 + radius, y + height / 2 - radius, Math.PI / 2, Math.PI, radius, pointsInArc), 71 | x - width / 2, y + height / 2 - radius, 72 | x - width / 2, y - height / 2 + radius, 73 | ...arc(x - width / 2 + radius, y - 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