├── .gitignore
├── Procfile
├── requirements.txt
├── static
├── images
│ └── blank.png
├── css
│ └── neoviva.css
├── index.html
└── js
│ ├── neoviva.js
│ ├── vivagraph.min.js
│ └── jquery.min.js
├── app.py
├── load_graph.py
├── Readme.adoc
└── import.py
/.gitignore:
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1 | .DS_Store
2 | venv
3 | *.pyc
4 |
5 |
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/Procfile:
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1 | web: python app.py $PORT
2 | #worker: python import.py
3 |
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/requirements.txt:
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1 | neo4j-driver==1.0.2
2 | requests==2.20.0
3 | web.py==0.37
4 | wsgiref==0.1.2
5 |
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/static/images/blank.png:
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https://raw.githubusercontent.com/neo4j-examples/twitter-graph-viz/HEAD/static/images/blank.png
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/static/css/neoviva.css:
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1 | .node {
2 | background-color: #00a2e8;
3 | width: 10px;
4 | height: 10px;
5 | position: absolute;
6 | }
7 | .link {
8 | background-color: #dddddd;
9 | position: absolute;
10 | }
11 |
12 | #graph1 {
13 | position: absolute;
14 | width: 100%;
15 | height: 100%;
16 | }
17 |
18 | #graph1 > svg {
19 | width: 100%;
20 | height: 100%;
21 | }
22 |
23 | #search {
24 | top: 5px;
25 | margin-left: auto;
26 | margin-right: auto;
27 | }
28 | #hoveredName {position: absolute; top: 40px; left: 10px; padding: 7px; background-color: #EFEFEF; text-align: center; display: none; max-width: 20em; font-family: "Helvetica";}
29 | #hoveredName > img { margin-top: 6px;}
30 | #hoveredName > div { font-size: smaller; text-align: left; margin-bottom: 5px; border-bottom: 1px solid black;}
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/app.py:
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1 | import web
2 | from load_graph import load_graph
3 | import requests
4 |
5 | urls = (
6 | '/', 'index',
7 | '/twitter/(.*)','twitter_img',
8 | '/text/(.*)','text_img',
9 | '/graph','graph'
10 | )
11 |
12 | class index:
13 | def GET(self):
14 | raise web.seeother('/static/index.html')
15 |
16 | class twitter_img:
17 | def GET(self,name):
18 | img = requests.get('http://pbs.twimg.com/profile_images/'+name)
19 | return img.content
20 |
21 | class text_img:
22 | def GET(self,name):
23 | img = requests.get('http://ansrv.com/png?s='+name+'&c=74d0f4&b=231d40&size=5')
24 | return img.content
25 |
26 | class graph:
27 | def GET(self):
28 | return load_graph()
29 |
30 |
31 | if __name__ == "__main__":
32 | app = web.application(urls, globals())
33 | app.run()
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/static/index.html:
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1 |
2 |
3 |
4 |
5 |
6 | Neo4j Twitter Graph Visualization
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
23 |
24 |
25 |
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/load_graph.py:
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1 | import requests
2 | import json
3 | import os
4 |
5 | url = os.environ.get('NEO4J_URL',"http://localhost:7474/db/data")
6 |
7 | def load_graph():
8 | query = """
9 | MATCH (t:Tweet)
10 | WITH t ORDER BY t.id DESC LIMIT 2000
11 | MATCH (user:User)-[:POSTS]->(t)<-[:TAGS]-(tag:Hashtag)
12 | MATCH (t)-[:MENTIONS]->(user2:User)
13 | UNWIND [tag,user2] as other WITH distinct user,other
14 | WHERE lower(other.name) <> 'oscon'
15 | RETURN { from: {id:id(user),label: head(labels(user)), data: user},
16 | rel: 'CONNECTS',
17 | to: {id: id(other), label: head(labels(other)), data: other}} as tuple
18 | LIMIT 1000
19 | """
20 | statements = {'statements':[{'statement':query}]}
21 | headers = {'content-type':'application/json'}
22 | res = requests.post(url + '/transaction/commit', data = json.dumps(statements), headers = headers)
23 | print res.status_code
24 | rows = res.json()['results'][0]['data']
25 | rows = map(lambda a: a['row'][0], rows)
26 | return json.dumps(rows)
27 |
28 | if __name__ == "__main__":
29 | print load_graph()
30 |
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/Readme.adoc:
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1 | == (OSCON) Twitter Graph
2 |
3 | Small Python sample app to load tweets for a certain twitter search continuously into a Neo4j instance
4 | and a webapp to render them with vivagraph.js (webgl)
5 |
6 | You can read the http://neo4j.com/blog/oscon-twitter-graph/[blog post for details].
7 |
8 | There is also a http://www.neo4j.org/graphgist?12b6cd13f1f1120f6099[GraphGist] explaining the model and some use-case queries in detail.
9 |
10 | image::http://dev.assets.neo4j.com.s3.amazonaws.com/wp-content/uploads/2014/07/image04.png?_ga=1.207666834.149316633.1397859613[width=400]
11 |
12 | The application uses the official https://github.com/neo4j/neo4j-python-driver[Neo4j-Python-Driver] which supports the binary *bolt* protocol.
13 | So it only works with Neo4j 3.x and later.
14 |
15 | == Usage
16 |
17 | === Import
18 |
19 | Start your neo4j server or provision a hosted server, e.g. at graphenedb.com or addons.heroku.com/graphenedb
20 |
21 | ----
22 | export NEO4J_URL=http://localhost:7474/db/data
23 | export TWITTER_BEARER=TWITTER_BEARER_TOKEN
24 |
25 | python import.py
26 | ----
27 |
28 | You can create a https://dev.twitter.com/docs/auth/application-only-auth[bearer token] for yourself by sending this request to twitter:
29 |
30 | ----
31 | curl -XPOST -u customer_id:customer_secret 'https://api.twitter.com/oauth2/token?grant_type=client_credentials'
32 | ----
33 |
34 | This will yield:
35 | ----
36 | {"token_type":"bearer","access_token":"....bearer token...."}
37 | ----
38 |
39 | === Webapp
40 |
41 | ----
42 | python app.py 8080
43 |
44 | open http://localhost:8080
45 | ----
46 |
47 | === Push to Heroku
48 |
49 | The application already contains a +Procfile+ for Heroku to run with the port provided.
50 |
51 | ----
52 | git init
53 | heroku apps:create my-twitter-graph
54 | heroku config:set NEO4J_URL=http://.....
55 | git push heroku master
56 | ----
57 |
58 | You can use a Neo4j instance on http://graphenedb.com[GrapheneDB] for your experiment or create an ec2 instance yourself using the http://neo4j.org/develop/cloud[cloud formation template].
59 |
60 | The import is not started automatically you can enable the worker in the Procfile to run the import automatically and continously.
61 |
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/import.py:
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1 | import requests
2 | import os
3 | import time
4 | import urllib
5 | from neo4j.v1 import GraphDatabase, basic_auth
6 |
7 | neo4jUrl = os.environ.get('NEO4J_URL',"bolt://localhost")
8 | neo4jUser = os.environ.get('NEO4J_USER',"neo4j")
9 | neo4jPass = os.environ.get('NEO4J_PASSWORD',"test")
10 | driver = GraphDatabase.driver(neo4jUrl, auth=basic_auth(neo4jUser, neo4jPass))
11 |
12 | session = driver.session()
13 |
14 | # Add uniqueness constraints.
15 | session.run( "CREATE CONSTRAINT ON (t:Tweet) ASSERT t.id IS UNIQUE;")
16 | session.run( "CREATE CONSTRAINT ON (u:User) ASSERT u.screen_name IS UNIQUE;")
17 | session.run( "CREATE CONSTRAINT ON (h:Hashtag) ASSERT h.name IS UNIQUE;")
18 | session.run( "CREATE CONSTRAINT ON (l:Link) ASSERT l.url IS UNIQUE;")
19 | session.run( "CREATE CONSTRAINT ON (s:Source) ASSERT s.name IS UNIQUE;")
20 |
21 | # Get Twitter bearer to pass to header.
22 | TWITTER_BEARER = os.environ["TWITTER_BEARER"]
23 |
24 | # URL parameters.
25 | q = urllib.quote_plus(os.environ.get("TWITTER_SEARCH","oscon OR neo4j OR #oscon OR @neo4j"))
26 |
27 | count = 100
28 | result_type = "recent"
29 | lang = "en"
30 | since_id = -1
31 |
32 | while True:
33 | try:
34 | print(q)
35 | # Build URL.
36 | url = "https://api.twitter.com/1.1/search/tweets.json?q=%s&count=%s&result_type=%s&lang=%s&since_id=%s" % (q, count, result_type, lang, since_id)
37 | # Send GET request.
38 | r = requests.get(url, headers = {"accept":"application/json","Authorization":"Bearer " + TWITTER_BEARER})
39 |
40 | # Keep status objects.
41 | tweets = r.json()["statuses"]
42 |
43 | if tweets:
44 | plural = "s." if len(tweets) > 1 else "."
45 | print("Found " + str(len(tweets)) + " tweet" + plural)
46 | else:
47 | print("No tweets found.\n")
48 | time.sleep(65)
49 | continue
50 |
51 | since_id = tweets[0].get('id')
52 |
53 | # Pass dict to Cypher and build query.
54 | query = """
55 | UNWIND {tweets} AS t
56 |
57 | WITH t
58 | ORDER BY t.id
59 |
60 | WITH t,
61 | t.entities AS e,
62 | t.user AS u,
63 | t.retweeted_status AS retweet
64 |
65 | MERGE (tweet:Tweet {id:t.id})
66 | SET tweet.text = t.text,
67 | tweet.created_at = t.created_at,
68 | tweet.favorites = t.favorite_count
69 |
70 | MERGE (user:User {screen_name:u.screen_name})
71 | SET user.name = u.name,
72 | user.location = u.location,
73 | user.followers = u.followers_count,
74 | user.following = u.friends_count,
75 | user.statuses = u.statusus_count,
76 | user.profile_image_url = u.profile_image_url
77 |
78 | MERGE (user)-[:POSTS]->(tweet)
79 |
80 | MERGE (source:Source {name:t.source})
81 | MERGE (tweet)-[:USING]->(source)
82 |
83 | FOREACH (h IN e.hashtags |
84 | MERGE (tag:Hashtag {name:LOWER(h.text)})
85 | MERGE (tag)-[:TAGS]->(tweet)
86 | )
87 |
88 | FOREACH (u IN e.urls |
89 | MERGE (url:Link {url:u.expanded_url})
90 | MERGE (tweet)-[:CONTAINS]->(url)
91 | )
92 |
93 | FOREACH (m IN e.user_mentions |
94 | MERGE (mentioned:User {screen_name:m.screen_name})
95 | ON CREATE SET mentioned.name = m.name
96 | MERGE (tweet)-[:MENTIONS]->(mentioned)
97 | )
98 |
99 | FOREACH (r IN [r IN [t.in_reply_to_status_id] WHERE r IS NOT NULL] |
100 | MERGE (reply_tweet:Tweet {id:r})
101 | MERGE (tweet)-[:REPLY_TO]->(reply_tweet)
102 | )
103 |
104 | FOREACH (retweet_id IN [x IN [retweet.id] WHERE x IS NOT NULL] |
105 | MERGE (retweet_tweet:Tweet {id:retweet_id})
106 | MERGE (tweet)-[:RETWEETS]->(retweet_tweet)
107 | )
108 | """
109 |
110 | # Send Cypher query.
111 | session.run(query,{'tweets':tweets})
112 | print("Tweets added to graph!\n")
113 | time.sleep(65)
114 |
115 | except Exception as e:
116 | print(e)
117 | time.sleep(65)
118 | continue
119 |
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/static/js/neoviva.js:
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1 | var colors = [
2 | 0x1f77b4ff, 0xaec7e8ff,
3 | 0xff7f0eff, 0xffbb78ff,
4 | 0x2ca02cff, 0x98df8aff,
5 | 0xd62728ff, 0xff9896ff,
6 | 0x9467bdff, 0xc5b0d5ff,
7 | 0x8c564bff, 0xc49c94ff,
8 | 0xe377c2ff, 0xf7b6d2ff,
9 | 0x7f7f7fff, 0xc7c7c7ff,
10 | 0xbcbd22ff, 0xdbdb8dff,
11 | 0x17becfff, 0x9edae5ff];
12 |
13 | function addNeo(graph, data) {
14 | function addNode(id,data) {
15 | if (!id || typeof id == "undefined") return null;
16 | var node = graph.getNode(id);
17 | if (!node) node = graph.addNode(id, data);
18 | return node;
19 | }
20 | for (var i=0;i
';
100 | t.empty().text("@" + id).append(n).show()
101 | }
102 | $.ajax("/tweets/" + node['id'], {
103 | type:"GET",
104 | dataType:"json",
105 | success:function (res) {
106 | console.log("tweets", res);
107 | for (var n=0;n" + res[n].text + "").appendTo(t)
109 | }
110 | }});
111 | };
112 | var onMouseLeave = function () {
113 | // $("#hoveredName").hide().empty()
114 | clearTimeout(timeout);
115 | };
116 |
117 | var onClick = function (node) {
118 | console.log("click", node);
119 | if (!node || !node.position) return;
120 | showBox(node);
121 | graphics.graphCenterChanged(node.position.x,node.position.y);
122 | renderer.rerender();
123 | loadData(graph,node.id);
124 | };
125 | var onDblClick = function (node) {
126 | console.log("double-click", node)
127 | };
128 |
129 | var unHighlightLinks = function (node, color) {
130 | if (node && node.id) {
131 | node.ui.size=12;
132 | graph.forEachLinkedNode(node.id, function (aNode, link) {
133 | link.ui.color = color || link.ui.oldColor
134 | })
135 | }
136 | };
137 | var highlightNode = function (node, color) {
138 | if (!(node && node.id && node.ui)) return;
139 | node.ui.size = 36;
140 | graph.forEachLinkedNode(node.id, function (aNode, link) {
141 | link.ui.color = color || 4278190335;
142 | graphics.bringLinkToFront(link.ui)
143 | })
144 | };
145 |
146 | inputs.mouseEnter(function (node) {
147 | onMouseEnter(node);
148 | unHighlightLinks(lastNode);
149 | lastNode = node;
150 | highlightNode(node);
151 | renderer.rerender()
152 | }).mouseLeave(function (node) {
153 | onMouseLeave();
154 | unHighlightLinks(lastNode);
155 | lastNode = null;
156 | unHighlightLinks(node);
157 | renderer.rerender()
158 | }).dblClick(function (node) {
159 | onDblClick(node)
160 | }).click(function (node) {
161 | onClick(node)
162 | });
163 |
164 |
165 | renderer.run();
166 | loadData(graph);
167 | l = layout;
168 | }
--------------------------------------------------------------------------------
/static/js/vivagraph.min.js:
--------------------------------------------------------------------------------
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n=r+i,o}),t.cancelAnimationFrame||(t.cancelAnimationFrame=function(e){t.clearTimeout(e)}),Viva.Graph.Utils.timer=function(e){var n,r=function(){t.cancelAnimationFrame(n),n=0},i=function(){n=t.requestAnimationFrame(i),e()||r()};return i(),{stop:r,restart:function(){n||i()}}}}(),Viva.Graph.geom=function(){return{intersect:function(e,t,n,r,i,o,a,u){var s,f,c,d,l,h,v,p,m,g,y,x,w,V={x:0,y:0};return s=r-t,c=e-n,l=n*t-e*r,m=s*i+c*o+l,g=s*a+c*u+l,0!==m&&0!==g&&m>=0==g>=4?null:(f=u-o,d=i-a,h=a*o-i*u,v=f*e+d*t+h,p=f*n+d*r+h,0!==v&&0!==p&&v>=0==p>=0?null:(y=s*d-f*c,0===y?null:(x=0>y?-y/2:y/2,x=0,w=c*h-d*l,V.x=(0>w?w-x:w+x)/y,w=f*l-s*h,V.y=(0>w?w-x:w+x)/y,V)))},intersectRect:function(e,t,n,r,i,o,a,u){return this.intersect(e,t,e,r,i,o,a,u)||this.intersect(e,r,n,r,i,o,a,u)||this.intersect(n,r,n,t,i,o,a,u)||this.intersect(n,t,e,t,i,o,a,u)},convexHull:function(e){var t=function(e,t){var n,r,i=function(t){var n=t.x-e.x,r=t.y-e.y,i=n>0?1:-1;return i*n*n/(n*n+r*r)},o=t.sort(function(e,t){return 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Object.create?Object.create(null):{},t=[],n={},r=0,i=0,o=[],a=function(e){e.fire("changed",o)},u=function(){i+=1},s=function(e){i-=1,0===i&&o.length>0&&(a(e),o.length=0)},f=function(e,t){o.push({node:e,changeType:t})},c=function(e,t){o.push({link:e,changeType:t})},d={addNode:function(t,n){if(t===void 0)throw{message:"Invalid node identifier"};u();var i=this.getNode(t);return i?f(i,"update"):(i=new Viva.Graph.Node(t),r++,f(i,"add")),i.data=n,e[t]=i,s(this),i},addLink:function(e,r,i){u();var o=this.getNode(e)||this.addNode(e),a=this.getNode(r)||this.addNode(r),f=""+e+"👉 "+(""+r),d=n.hasOwnProperty(f);(d||this.hasLink(e,r))&&(d||(n[f]=0),f+="@"+ ++n[f]);var l=new Viva.Graph.Link(e,r,i,f);return t.push(l),o.links.push(l),a.links.push(l),c(l,"add"),s(this),l},removeLink:function(e){if(!e)return!1;var n=Viva.Graph.Utils.indexOfElementInArray(e,t);if(0>n)return!1;u(),t.splice(n,1);var r=this.getNode(e.fromId),i=this.getNode(e.toId);return r&&(n=Viva.Graph.Utils.indexOfElementInArray(e,r.links),n>=0&&r.links.splice(n,1)),i&&(n=Viva.Graph.Utils.indexOfElementInArray(e,i.links),n>=0&&i.links.splice(n,1)),c(e,"remove"),s(this),!0},removeNode:function(t){var n=this.getNode(t);if(!n)return!1;for(u();n.links.length;){var i=n.links[0];this.removeLink(i)}e[t]=null,delete e[t],r--,f(n,"remove"),s(this)},getNode:function(t){return e[t]},getNodesCount:function(){return r},getLinksCount:function(){return t.length},getLinks:function(e){var t=this.getNode(e);return t?t.links:null},forEachNode:function(t){if("function"==typeof t){var n;for(n in e)if(t(e[n]))return}},forEachLinkedNode:function(t,n,r){var i,o,a,u=this.getNode(t);if(u&&u.links&&"function"==typeof n)if(r)for(i=0;u.links.length>i;++i)o=u.links[i],o.fromId===t&&n(e[o.toId],o);else for(i=0;u.links.length>i;++i)o=u.links[i],a=o.fromId===t?o.toId:o.fromId,n(e[a],o)},forEachLink:function(e){var n,r;if("function"==typeof e)for(n=0,r=t.length;r>n;++n)e(t[n])},beginUpdate:function(){u()},endUpdate:function(){s(this)},clear:function(){var e=this;e.beginUpdate(),e.forEachNode(function(t){e.removeNode(t.id)}),e.endUpdate()},hasLink:function(e,t){var n,r=this.getNode(e);if(!r)return null;for(n=0;r.links.length>n;++n){var i=r.links[n];if(i.fromId===e&&i.toId===t)return i}return null}};return Viva.Graph.Utils.events(d).extend(),d},Viva.Graph.operations=function(){return{density:function(e,t){var n=e.getNodesCount();return 0===n?0/0:t?e.getLinksCount()/(n*(n-1)):2*e.getLinksCount()/(n*(n-1))}}},Viva.Graph.Physics=Viva.Graph.Physics||{},Viva.Graph.Physics.Vector=function(e,t){this.x=e||0,this.y=t||0},Viva.Graph.Physics.Vector.prototype={multiply:function(e){return new Viva.Graph.Physics.Vector(this.x*e,this.y*e)}},Viva.Graph.Physics.Point=function(e,t){this.x=e||0,this.y=t||0},Viva.Graph.Physics.Point.prototype={add:function(e){return new Viva.Graph.Physics.Point(this.x+e.x,this.y+e.y)}},Viva.Graph.Physics.Body=function(){this.mass=1,this.force=new Viva.Graph.Physics.Vector,this.velocity=new Viva.Graph.Physics.Vector,this.location=new Viva.Graph.Physics.Point,this.prevLocation=new Viva.Graph.Physics.Point},Viva.Graph.Physics.Body.prototype={loc:function(e){return e?(this.location.x=e.x,this.location.y=e.y,this):this.location},vel:function(e){return e?(this.velocity.x=e.x,this.velocity.y=e.y,this):this.velocity}},Viva.Graph.Physics.Spring=function(e,t,n,r,i){this.body1=e,this.body2=t,this.length=n,this.coeff=r,this.weight=i},Viva.Graph.Physics.QuadTreeNode=function(){this.centerOfMass=new Viva.Graph.Physics.Point,this.children=[],this.body=null,this.hasChildren=!1,this.x1=0,this.y1=0,this.x2=0,this.y2=0},Viva.Graph.Physics=Viva.Graph.Physics||{},Viva.Graph.Physics.eulerIntegrator=function(){return{integrate:function(e,t){var n,r=e.speedLimit,i=0,o=0,a=e.bodies.length;for(n=0;a>n;++n){var u=e.bodies[n],s=t/u.mass;u.velocity.x+=s*u.force.x,u.velocity.y+=s*u.force.y;var f=u.velocity.x,c=u.velocity.y,d=Math.sqrt(f*f+c*c);d>r&&(u.velocity.x=r*f/d,u.velocity.y=r*c/d),i=t*u.velocity.x,o=t*u.velocity.y,u.location.x+=i,u.location.y+=o}return i*i+o*o}}},Viva.Graph.Physics.nbodyForce=function(e){function t(e,t){this.node=e,this.body=t}function n(){this.stack=[],this.popIdx=0}e=Viva.lazyExtend(e||{gravity:-1,theta:.8}),n.prototype={isEmpty:function(){return 0===this.popIdx},push:function(e,n){var r=this.stack[this.popIdx];r?(r.node=e,r.body=n):this.stack[this.popIdx]=new t(e,n),++this.popIdx},pop:function(){return this.popIdx>0?this.stack[--this.popIdx]:void 0},reset:function(){this.popIdx=0}};var r=e.gravity,i=[],o=new n,a=e.theta,u=Viva.random("5f4dcc3b5aa765d61d8327deb882cf99",75,20,63,108,65,76,65,72),s=function(){this.body=null,this.quads=[],this.mass=0,this.massX=0,this.massY=0,this.left=0,this.top=0,this.bottom=0,this.right=0,this.isInternal=!1},f=[],c=0,d=function(){var e;return f[c]?(e=f[c],e.quads[0]=null,e.quads[1]=null,e.quads[2]=null,e.quads[3]=null,e.body=null,e.mass=e.massX=e.massY=0,e.left=e.right=e.top=e.bottom=0,e.isInternal=!1):(e=new s,f[c]=e),++c,e},l=d(),h=function(e,t){var n=Math.abs(e.x-t.x),r=Math.abs(e.y-t.y);return 1e-8>n&&1e-8>r},v=function(e){for(o.reset(),o.push(l,e);!o.isEmpty();){var t=o.pop(),n=t.node,r=t.body;if(n.isInternal){var i=r.location.x,a=r.location.y;n.mass=n.mass+r.mass,n.massX=n.massX+r.mass*i,n.massY=n.massY+r.mass*a;var s=0,f=n.left,c=(n.right+f)/2,v=n.top,p=(n.bottom+v)/2;if(i>c){s+=1;var m=f;f=c,c+=c-m}if(a>p){s+=2;var g=v;v=p,p+=p-g}var y=n.quads[s];y||(y=d(),y.left=f,y.top=v,y.right=c,y.bottom=p,n.quads[s]=y),o.push(y,r)}else if(n.body){var x=n.body;if(n.body=null,n.isInternal=!0,h(x.location,r.location)){if(1e-8>n.right-n.left)return;do{var w=u.nextDouble(),V=(n.right-n.left)*w,b=(n.bottom-n.top)*w;x.location.x=n.left+V,x.location.y=n.top+b}while(h(x.location,r.location))}o.push(n,x),o.push(n,r)}else n.body=r}},p=function(e){var t,n,o,s,f=i,c=1,d=0,h=1;for(f[0]=l;c;){var v=f[d],p=v.body;c-=1,d+=1,p&&p!==e?(n=p.location.x-e.location.x,o=p.location.y-e.location.y,s=Math.sqrt(n*n+o*o),0===s&&(n=(u.nextDouble()-.5)/50,o=(u.nextDouble()-.5)/50,s=Math.sqrt(n*n+o*o)),t=r*p.mass*e.mass/(s*s*s),e.force.x=e.force.x+t*n,e.force.y=e.force.y+t*o):(n=v.massX/v.mass-e.location.x,o=v.massY/v.mass-e.location.y,s=Math.sqrt(n*n+o*o),0===s&&(n=(u.nextDouble()-.5)/50,o=(u.nextDouble()-.5)/50,s=Math.sqrt(n*n+o*o)),a>(v.right-v.left)/s?(t=r*v.mass*e.mass/(s*s*s),e.force.x=e.force.x+t*n,e.force.y=e.force.y+t*o):(v.quads[0]&&(f[h]=v.quads[0],c+=1,h+=1),v.quads[1]&&(f[h]=v.quads[1],c+=1,h+=1),v.quads[2]&&(f[h]=v.quads[2],c+=1,h+=1),v.quads[3]&&(f[h]=v.quads[3],c+=1,h+=1)))}},m=function(e){var t,n=Number.MAX_VALUE,r=Number.MAX_VALUE,i=Number.MIN_VALUE,o=Number.MIN_VALUE,a=e.bodies,u=a.length;for(t=u;t--;){var s=a[t].location.x,f=a[t].location.y;n>s&&(n=s),s>i&&(i=s),r>f&&(r=f),f>o&&(o=f)}var h=i-n,p=o-r;for(h>p?o=r+h:i=n+p,c=0,l=d(),l.left=n,l.right=i,l.top=r,l.bottom=o,t=u;t--;)v(a[t],l)};return{insert:v,init:m,update:p,options:function(e){return e?("number"==typeof e.gravity&&(r=e.gravity),"number"==typeof e.theta&&(a=e.theta),this):{gravity:r,theta:a}}}},Viva.Graph.Physics.dragForce=function(e){e||(e={});var t={coeff:e.coeff||.01};return{update:function(e){e.force.x-=t.coeff*e.velocity.x,e.force.y-=t.coeff*e.velocity.y},options:function(e){return e?("number"==typeof e.coeff&&(t.coeff=e.coeff),this):t}}},Viva.Graph.Physics.springForce=function(e){e=Viva.lazyExtend(e,{length:50,coeff:22e-5});var t=Viva.random("Random number 4.","Chosen by fair dice roll");return{update:function(n){var r=n.body1,i=n.body2,o=0>n.length?e.length:n.length,a=i.location.x-r.location.x,u=i.location.y-r.location.y,s=Math.sqrt(a*a+u*u);0===s&&(a=(t.nextDouble()-.5)/50,u=(t.nextDouble()-.5)/50,s=Math.sqrt(a*a+u*u));var f=s-o,c=(!n.coeff||0>n.coeff?e.coeff:n.coeff)*f/s*n.weight;r.force.x+=c*a,r.force.y+=c*u,i.force.x+=-c*a,i.force.y+=-c*u},options:function(t){return t?("number"==typeof t.length&&(e.length=t.length),"number"==typeof t.coeff&&(e.coeff=t.coeff),this):e}}},Viva.Graph.Physics=Viva.Graph.Physics||{},Viva.Graph.Physics.forceSimulator=function(e){var t,n,r,i=e,o=[],a=[];return{speedLimit:1,bodies:o,accumulate:function(){var e,i;for(n.init(this),e=o.length;e--;)i=o[e],i.force.x=0,i.force.y=0,n.update(i),r.update(i);for(e=a.length;e--;)t.update(a[e])},run:function(e){return this.accumulate(),i.integrate(this,e)},addBody:function(e){if(!e)throw{message:"Cannot add null body to force simulator"};return o.push(e),e},removeBody:function(e){if(!e)return!1;var t=Viva.Graph.Utils.indexOfElementInArray(e,o);return 0>t?!1:o.splice(t,1)},addSpring:function(e,t,n,r,i){if(!e||!t)throw{message:"Cannot add null spring to force simulator"};if("number"!=typeof n)throw{message:"Spring length should be a number"};r="number"==typeof r?r:1;var o=new Viva.Graph.Physics.Spring(e,t,n,i>=0?i:-1,r);return a.push(o),o},removeSpring:function(e){if(!e)return!1;var t=Viva.Graph.Utils.indexOfElementInArray(e,a);return 0>t?!1:a.splice(t,1)},setNbodyForce:function(e){if(!e)throw{message:"Cannot add mighty (unknown) force to the simulator"};n=e},setDragForce:function(e){if(!e)throw{message:"Cannot add mighty (unknown) force to the simulator"};r=e},setSpringForce:function(e){if(!e)throw{message:"Cannot add unknown force to the simulator"};t=e}}},Viva.Graph.Layout=Viva.Graph.Layout||{},Viva.Graph.Layout.forceDirected=function(e,t){if(!e)throw{message:"Graph structure cannot be undefined"};t=Viva.lazyExtend(t,{springLength:80,springCoeff:2e-4,gravity:-1.2,theta:.8,dragCoeff:.02,springTransform:function(){},timeStep:20,stableThreshold:.001});var n=Viva.Graph.Physics.forceSimulator(Viva.Graph.Physics.eulerIntegrator()),r=Viva.Graph.Physics.nbodyForce({gravity:t.gravity,theta:t.theta}),i=Viva.Graph.Physics.springForce({length:t.springLength,coeff:t.springCoeff}),o=Viva.Graph.Physics.dragForce({coeff:t.dragCoeff}),a=new Viva.Graph.Rect,u=Viva.random("ted.com",103,114,101,97,116),s={},f=function(e){if(e.position)return e.position;var n=(a.x1+a.x2)/2,r=(a.y1+a.y2)/2,i=t.springLength;if(e.links&&e.links.length>0){var o=e.links[0],f=o.fromId!==e.id?s[o.fromId]:s[o.toId];f&&f.location&&(n=f.location.x,r=f.location.y)}return{x:n+u.next(i)-i/2,y:r+u.next(i)-i/2}},c=function(e){return s[e]},d=function(e){s[e]=null,delete s[e]},l={},h=function(t){var n=c(t);n.mass=1+e.getLinks(t).length/3},v=function(e){return e&&(e.isPinned||e.data&&e.data.isPinned)},p=function(e){return e.isPinned},m=function(t){var r=c(t);if(!r){var i=e.getNode(t);if(!i)return;r=new Viva.Graph.Physics.Body,s[t]=r;var o=f(i);r.loc(o),h(t),v(i)&&(r.isPinned=!0),n.addBody(r)}},g=function(e){m(e.id)},y=function(t){var r=c(t.id);r&&(d(t.id),n.removeBody(r),0===e.getNodesCount()&&(a.x1=a.y1=0,a.x2=a.y2=0))},x=function(e){h(e.fromId),h(e.toId);var r=c(e.fromId),i=c(e.toId),o=n.addSpring(r,i,-1,e.weight);t.springTransform(e,o),l[e.id]=o},w=function(t){var r=l[t.id];if(r){var i=e.getNode(t.fromId),o=e.getNode(t.toId);i&&h(i.id),o&&h(o.id),delete l[t.id],n.removeSpring(r)}},V=function(e){for(var t=0;e.length>t;++t){var n=e[t];"add"===n.changeType?(n.node&&m(n.node.id),n.link&&x(n.link)):"remove"===n.changeType&&(n.node&&y(n.node),n.link&&w(n.link))}},b=function(){e.forEachNode(g),e.forEachLink(x),e.addEventListener("changed",V)},N=function(){var t=Number.MAX_VALUE,n=Number.MAX_VALUE,r=Number.MIN_VALUE,i=Number.MIN_VALUE;if(0!==e.getNodesCount()){for(var o in s)if(s.hasOwnProperty(o)){var u=s[o];p(u)?(u.location.x=u.prevLocation.x,u.location.y=u.prevLocation.y):(u.prevLocation.x=u.location.x,u.prevLocation.y=u.location.y),t>u.location.x&&(t=u.location.x),u.location.x>r&&(r=u.location.x),n>u.location.y&&(n=u.location.y),u.location.y>i&&(i=u.location.y)}a.x1=t,a.x2=r,a.y1=n,a.y2=i}};return n.setSpringForce(i),n.setNbodyForce(r),n.setDragForce(o),b(),{run:function(e){var t;for(e=e||50,t=0;e>t;++t)this.step()},step:function(){var e=n.run(t.timeStep);return N(),t.stableThreshold>e},isNodePinned:function(e){var t=c(e.id);return t?p(t):void 0},pinNode:function(e,t){var n=c(e.id);n.isPinned=!!t},getNodePosition:function(e){var t=c(e);return t||(m(e),t=c(e)),t&&t.location},getLinkPosition:function(e){var t=this.getNodePosition(e.fromId),n=this.getNodePosition(e.toId);return{from:t,to:n}},setNodePosition:function(e,t,n){var r=c(e.id);r&&(r.prevLocation.x=r.location.x=t,r.prevLocation.y=r.location.y=n)},getGraphRect:function(){return a},dispose:function(){e.removeEventListener("change",V)},springLength:function(e){return 1===arguments.length?(i.options({length:e}),this):i.options().length},springCoeff:function(e){return 1===arguments.length?(i.options({coeff:e}),this):i.options().coeff},gravity:function(e){return 1===arguments.length?(r.options({gravity:e}),this):r.options().gravity},theta:function(e){return 1===arguments.length?(r.options({theta:e}),this):r.options().theta},drag:function(e){return 1===arguments.length?(o.options({coeff:e}),this):o.options().coeff}}},Viva.Graph.Layout=Viva.Graph.Layout||{},Viva.Graph.Layout.constant=function(e,t){t=Viva.lazyExtend(t,{maxX:1024,maxY:1024,seed:"Deterministic randomness made me do this"});var n=Viva.random(t.seed),r=new Viva.Graph.Rect(Number.MAX_VALUE,Number.MAX_VALUE,Number.MIN_VALUE,Number.MIN_VALUE),i=function(){return new Viva.Graph.Point2d(n.next(t.maxX),n.next(t.maxY))},o=function(e,t){e.xt.x2&&(t.x2=e.x),e.yt.y2&&(t.y2=e.y)},a="function"==typeof 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e.attr("transform",t),l(this),this},init:function(n){t=Viva.Graph.svg("svg"),e=Viva.Graph.svg("g").attr("buffered-rendering","dynamic"),t.appendChild(e),n.appendChild(t),m(),"function"==typeof i&&i(t)},release:function(e){t&&e&&e.removeChild(t)},addLink:function(t,n){var r=c(t);if(r)return r.position=n,r.link=t,u[t.id]=r,e.childElementCount>0?e.insertBefore(r,e.firstChild):e.appendChild(r),r},releaseLink:function(t){var n=u[t.id];n&&(e.removeChild(n),delete u[t.id])},addNode:function(t,n){var r=s(t);if(r)return r.position=n,r.node=t,a[t.id]=r,e.appendChild(r),r},releaseNode:function(t){var n=a[t.id];n&&(e.removeChild(n),delete a[t.id])},renderNodes:function(){for(var e in a)if(a.hasOwnProperty(e)){var t=a[e];h.x=t.position.x,h.y=t.position.y,f(t,h,t.node)}},renderLinks:function(){for(var e in u)if(u.hasOwnProperty(e)){var t=u[e];v.x=t.position.from.x,v.y=t.position.from.y,p.x=t.position.to.x,p.y=t.position.to.y,d(t,v,p,t.link)}},getGraphicsRoot:function(e){return"function"==typeof e&&(t?e(t):i=e),t},getSvgRoot:function(){return t}};return Viva.Graph.Utils.events(g).extend(),g},Viva.Graph.View.svgNodeFactory=function(e){var t="#999",n=Viva.Graph.geom(),r=function(e){e.size={w:10,h:10},e.append("rect").attr("width",e.size.w).attr("height",e.size.h).attr("stroke","orange").attr("fill","orange")},i=function(e){return e.size};return{node:function(e){var t=Viva.Graph.svg("g");return r(t,e),t.nodeId=e.id,t},link:function(n){var r=e.getNode(n.fromId),i=r&&r.ui;if(i&&!i.linksContainer){var o=Viva.Graph.svg("path").attr("stroke",t);return i.linksContainer=o,o}return null},customContent:function(e,t){if("function"!=typeof e||"function"!=typeof t)throw"Two functions expected: contentCreator(nodeUI, node) and size(nodeUI)";r=e,i=t},placeNode:function(t,r){var o="",a=i(t);e.forEachLinkedNode(t.nodeId,function(e,u){if(e.position&&e.ui&&e.ui!==t&&u.fromId===t.nodeId){var 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e},copyArrayPart:function(e,t,n,r){var i;for(i=0;r>i;++i)e[t+i]=e[n+i]},swapArrayPart:function(e,t,n,r){var i;for(i=0;r>i;++i){var o=e[t+i];e[t+i]=e[n+i],e[n+i]=o}},getLocations:function(t,n){var r,i={};for(r=0;n.length>r;++r){var o=n[r],a=-1;if(0===o.indexOf("a_")){if(a=e.getAttribLocation(t,o),-1===a)throw"Program doesn't have required attribute: "+o;i[o.slice(2)]=a}else{if(0!==o.indexOf("u_"))throw"Couldn't figure out your intent. 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n=e.id;v[n*f]=t.x,v[n*f+1]=t.y,v[n*f+2]=e.size,p[n*f+3]=e.color},updateTransform:function(e){s=!0,u=e},updateSize:function(e,t){o=e,a=t,s=!0},removeNode:function(e){m>0&&(m-=1),m>e.id&&m>0&&i.copyArrayPart(p,e.id*f,m*f,f)},createNode:function(){g(),m+=1},replaceProperties:function(){},render:function(){t.useProgram(e),t.bindBuffer(t.ARRAY_BUFFER,n),t.bufferData(t.ARRAY_BUFFER,h,t.DYNAMIC_DRAW),s&&(s=!1,t.uniformMatrix4fv(r.transform,!1,u),t.uniform2f(r.screenSize,o,a)),t.vertexAttribPointer(r.vertexPos,3,t.FLOAT,!1,f*Float32Array.BYTES_PER_ELEMENT,0),t.vertexAttribPointer(r.color,4,t.UNSIGNED_BYTE,!0,f*Float32Array.BYTES_PER_ELEMENT,12),t.drawArrays(t.POINTS,0,m)}}},Viva.Graph.View.webglLinkProgram=function(){var e,t,n,r,i,o,a,u,s,f,c=6,d=2*(2*Float32Array.BYTES_PER_ELEMENT+Uint32Array.BYTES_PER_ELEMENT),l=["precision mediump float;","varying vec4 color;","void main(void) {"," gl_FragColor = color;","}"].join("\n"),h=["attribute vec2 a_vertexPos;","attribute vec4 a_color;","uniform vec2 u_screenSize;","uniform mat4 u_transform;","varying vec4 color;","void main(void) {"," gl_Position = u_transform * vec4(a_vertexPos/u_screenSize, 0.0, 1.0);"," color = a_color.abgr;","}"].join("\n"),v=0,p=new ArrayBuffer(16*d),m=new Float32Array(p),g=new Uint32Array(p),y=function(){if((v+1)*d>p.byteLength){var e=new ArrayBuffer(2*p.byteLength),t=new Float32Array(e),n=new Uint32Array(e);n.set(g),m=t,g=n,p=e}};return{load:function(o){t=o,r=Viva.Graph.webgl(o),e=r.createProgram(h,l),t.useProgram(e),i=r.getLocations(e,["a_vertexPos","a_color","u_screenSize","u_transform"]),t.enableVertexAttribArray(i.vertexPos),t.enableVertexAttribArray(i.color),n=t.createBuffer()},position:function(e,t,n){var r=e.id,i=r*c;m[i]=t.x,m[i+1]=t.y,g[i+2]=e.color,m[i+3]=n.x,m[i+4]=n.y,g[i+5]=e.color},createLink:function(e){y(),v+=1,o=e.id},removeLink:function(e){v>0&&(v-=1),v>e.id&&v>0&&r.copyArrayPart(g,e.id*c,v*c,c)},updateTransform:function(e){f=!0,s=e},updateSize:function(e,t){a=e,u=t,f=!0},render:function(){t.useProgram(e),t.bindBuffer(t.ARRAY_BUFFER,n),t.bufferData(t.ARRAY_BUFFER,p,t.DYNAMIC_DRAW),f&&(f=!1,t.uniformMatrix4fv(i.transform,!1,s),t.uniform2f(i.screenSize,a,u)),t.vertexAttribPointer(i.vertexPos,2,t.FLOAT,!1,3*Float32Array.BYTES_PER_ELEMENT,0),t.vertexAttribPointer(i.color,4,t.UNSIGNED_BYTE,!0,3*Float32Array.BYTES_PER_ELEMENT,8),t.drawArrays(t.LINES,0,2*v),o=v-1},bringToFront:function(e){o>e.id&&r.swapArrayPart(m,e.id*c,o*c,c),o>0&&(o-=1)},getFrontLinkId:function(){return o}}},Viva.Graph.View.Texture=function(e){this.canvas=window.document.createElement("canvas"),this.ctx=this.canvas.getContext("2d"),this.isDirty=!1,this.canvas.width=this.canvas.height=e},Viva.Graph.View.webglAtlas=function(e){var t,n,r=Math.sqrt(e||1024)<<0,i=r,o=1,a={},u=0,s=[],f=[],c=function(e){return 0===(e&e-1)},d=function(){var e=new Viva.Graph.View.Texture(r*i);s.push(e)},l=function(t){var n=t/e<<0,i=t%e,o=i/r<<0,a=i%r;return{textureNumber:n,row:o,col:a}},h=function(){n.isDirty=!0,u=0,t=null},v=function(){t&&(window.clearTimeout(t),u+=1,t=null),u>10?h():t=window.setTimeout(h,400)},p=function(e,t){var n=s[e.textureNumber].canvas,r=s[t.textureNumber].ctx,o=t.col*i,a=t.row*i;r.drawImage(n,e.col*i,e.row*i,i,i,o,a,i,i),s[e.textureNumber].isDirty=!0,s[t.textureNumber].isDirty=!0},m=function(e,t,n){var r=l(e),o={offset:e};r.textureNumber>=s.length&&d();var u=s[r.textureNumber];u.ctx.drawImage(t,r.col*i,r.row*i,i,i),f[e]=t.src,a[t.src]=o,u.isDirty=!0,n(o)};if(!c(e))throw"Tiles per texture should be power of two.";return n={isDirty:!1,clearDirty:function(){var e;for(this.isDirty=!1,e=0;s.length>e;++e)s[e].isDirty=!1},remove:function(e){var t=a[e];if(!t)return!1;if(delete a[e],o-=1,o===t.offset)return!0;var n=l(t.offset),r=l(o);p(r,n);var i=a[f[o]];return i.offset=t.offset,f[t.offset]=f[o],v(),!0},getTextures:function(){return s},getCoordinates:function(e){return a[e]},load:function(e,t){if(a.hasOwnProperty(e))t(a[e]);else{var n=new window.Image,r=o;o+=1,n.crossOrigin="anonymous",n.onload=function(){v(),m(r,n,t)},n.src=e}}}},Viva.Graph.View.webglImageNodeProgram=function(){var e,t,n,r,i,o,a,u,s,f,c=18,d=["precision mediump float;","varying vec4 color;","varying vec3 vTextureCoord;","uniform sampler2D u_sampler0;","uniform sampler2D u_sampler1;","uniform sampler2D u_sampler2;","uniform sampler2D u_sampler3;","void main(void) {"," if (vTextureCoord.z == 0.) {"," gl_FragColor = texture2D(u_sampler0, vTextureCoord.xy);"," } else if (vTextureCoord.z == 1.) {"," gl_FragColor = texture2D(u_sampler1, vTextureCoord.xy);"," } else if (vTextureCoord.z == 2.) {"," gl_FragColor = texture2D(u_sampler2, vTextureCoord.xy);"," } else if (vTextureCoord.z == 3.) {"," gl_FragColor = texture2D(u_sampler3, vTextureCoord.xy);"," } else { gl_FragColor = vec4(0, 1, 0, 1); }","}"].join("\n"),l=["attribute vec2 a_vertexPos;","attribute float a_customAttributes;","uniform vec2 u_screenSize;","uniform mat4 u_transform;","uniform float u_tilesPerTexture;","varying vec3 vTextureCoord;","void main(void) {"," gl_Position = u_transform * vec4(a_vertexPos/u_screenSize, 0, 1);","float corner = mod(a_customAttributes, 4.);","float tileIndex = mod(floor(a_customAttributes / 4.), u_tilesPerTexture);","float tilesPerRow = sqrt(u_tilesPerTexture);","float tileSize = 1./tilesPerRow;","float tileColumn = mod(tileIndex, tilesPerRow);","float tileRow = floor(tileIndex/tilesPerRow);","if(corner == 0.0) {"," vTextureCoord.xy = vec2(0, 1);","} else if(corner == 1.0) {"," 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t,n=e.getTextures();for(t=0;n.length>t;++t)(n[t].isDirty||!n[t].nativeObject)&&m(n[t],t);e.clearDirty()}};return{load:function(a){n=a,i=Viva.Graph.webgl(a),e=new Viva.Graph.View.webglAtlas(h),t=i.createProgram(l,d),n.useProgram(t),o=i.getLocations(t,["a_vertexPos","a_customAttributes","u_screenSize","u_transform","u_sampler0","u_sampler1","u_sampler2","u_sampler3","u_tilesPerTexture"]),n.uniform1f(o.tilesPerTexture,h),n.enableVertexAttribArray(o.vertexPos),n.enableVertexAttribArray(o.customAttributes),r=n.createBuffer()},position:function(e,t){var n=e.id*c;p[n]=t.x-e.size,p[n+1]=t.y-e.size,p[n+2]=4*e._offset,p[n+3]=t.x+e.size,p[n+4]=t.y-e.size,p[n+5]=4*e._offset+1,p[n+6]=t.x-e.size,p[n+7]=t.y+e.size,p[n+8]=4*e._offset+2,p[n+9]=t.x-e.size,p[n+10]=t.y+e.size,p[n+11]=4*e._offset+2,p[n+12]=t.x+e.size,p[n+13]=t.y-e.size,p[n+14]=4*e._offset+1,p[n+15]=t.x+e.size,p[n+16]=t.y+e.size,p[n+17]=4*e._offset+3},createNode:function(t){p=i.extendArray(p,v,c),v+=1;var n=e.getCoordinates(t.src);n?t._offset=n.offset:(t._offset=0,e.load(t.src,function(e){t._offset=e.offset}))},removeNode:function(t){v>0&&(v-=1),v>t.id&&v>0&&(t.src&&e.remove(t.src),i.copyArrayPart(p,t.id*c,v*c,c))},replaceProperties:function(e,t){t._offset=e._offset},updateTransform:function(e){f=!0,s=e},updateSize:function(e,t){a=e,u=t,f=!0},render:function(){n.useProgram(t),n.bindBuffer(n.ARRAY_BUFFER,r),n.bufferData(n.ARRAY_BUFFER,p,n.DYNAMIC_DRAW),f&&(f=!1,n.uniformMatrix4fv(o.transform,!1,s),n.uniform2f(o.screenSize,a,u)),n.vertexAttribPointer(o.vertexPos,2,n.FLOAT,!1,3*Float32Array.BYTES_PER_ELEMENT,0),n.vertexAttribPointer(o.customAttributes,1,n.FLOAT,!1,3*Float32Array.BYTES_PER_ELEMENT,8),g(),n.drawArrays(n.TRIANGLES,0,6*v)}}},Viva.Graph.View=Viva.Graph.View||{},Viva.Graph.View.webglGraphics=function(e){e=Viva.lazyExtend(e,{enableBlending:!0,preserveDrawingBuffer:!1,clearColor:!1,clearColorValue:{r:1,g:1,b:1,a:1}});var t,n,r,i,o,a,u,s,f=0,c=0,d=[1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1],l=[],h=[],v={},p={},m=Viva.Graph.View.webglLinkProgram(),g=Viva.Graph.View.webglNodeProgram(),y=function(){return Viva.Graph.View.webglSquare()},x=function(){return Viva.Graph.View.webglLine(3014898687)},w=function(){m.updateTransform(d),g.updateTransform(d)},V=function(){d=[1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1]},b=function(){t&&n&&(i=n.width=Math.max(t.offsetWidth,1),o=n.height=Math.max(t.offsetHeight,1),r&&r.viewport(0,0,i,o),m&&m.updateSize(i/2,o/2),g&&g.updateSize(i/2,o/2))},N=function(e){e.fire("rescaled")},P={getLinkUI:function(e){return p[e]},getNodeUI:function(e){return v[e]},node:function(e){return"function"==typeof e?(y=e,this):void 0},link:function(e){return"function"==typeof e?(x=e,this):void 0},placeNode:function(e){return a=e,this},placeLink:function(e){return 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