├── app
├── .gitignore
├── src
│ ├── main
│ │ ├── res
│ │ │ ├── values
│ │ │ │ ├── strings.xml
│ │ │ │ ├── themes.xml
│ │ │ │ └── colors.xml
│ │ │ ├── mipmap-hdpi
│ │ │ │ ├── ic_launcher.webp
│ │ │ │ └── ic_launcher_round.webp
│ │ │ ├── mipmap-mdpi
│ │ │ │ ├── ic_launcher.webp
│ │ │ │ └── ic_launcher_round.webp
│ │ │ ├── mipmap-xhdpi
│ │ │ │ ├── ic_launcher.webp
│ │ │ │ └── ic_launcher_round.webp
│ │ │ ├── mipmap-xxhdpi
│ │ │ │ ├── ic_launcher.webp
│ │ │ │ └── ic_launcher_round.webp
│ │ │ ├── mipmap-xxxhdpi
│ │ │ │ ├── ic_launcher.webp
│ │ │ │ └── ic_launcher_round.webp
│ │ │ ├── mipmap-anydpi-v26
│ │ │ │ ├── ic_launcher.xml
│ │ │ │ └── ic_launcher_round.xml
│ │ │ ├── xml
│ │ │ │ ├── backup_rules.xml
│ │ │ │ └── data_extraction_rules.xml
│ │ │ └── drawable
│ │ │ │ ├── ic_launcher_foreground.xml
│ │ │ │ └── ic_launcher_background.xml
│ │ ├── java
│ │ │ └── com
│ │ │ │ └── example
│ │ │ │ └── composeballssimulation
│ │ │ │ ├── Ball.kt
│ │ │ │ ├── ui
│ │ │ │ └── theme
│ │ │ │ │ ├── Color.kt
│ │ │ │ │ ├── Type.kt
│ │ │ │ │ └── Theme.kt
│ │ │ │ ├── PhysicsEngine.kt
│ │ │ │ ├── MainActivity.kt
│ │ │ │ └── BallsSimulation.kt
│ │ └── AndroidManifest.xml
│ ├── test
│ │ └── java
│ │ │ └── com
│ │ │ └── example
│ │ │ └── composeballssimulation
│ │ │ └── ExampleUnitTest.kt
│ └── androidTest
│ │ └── java
│ │ └── com
│ │ └── example
│ │ └── composeballssimulation
│ │ └── ExampleInstrumentedTest.kt
├── proguard-rules.pro
└── build.gradle.kts
├── .idea
├── .gitignore
├── vcs.xml
└── misc.xml
├── README.md
├── gradle
├── wrapper
│ ├── gradle-wrapper.jar
│ └── gradle-wrapper.properties
└── libs.versions.toml
├── .gitignore
├── settings.gradle.kts
├── gradle.properties
├── gradlew.bat
└── gradlew
/app/.gitignore:
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1 | /build
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/.idea/.gitignore:
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1 | # Default ignored files
2 | /shelf/
3 | /workspace.xml
4 |
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/README.md:
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3 | https://github.com/user-attachments/assets/becdf623-ffb0-4b28-9d71-92dd3f5a1e2c
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/app/src/main/res/values/strings.xml:
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2 | ComposeBallsSimulation
3 |
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/gradle/wrapper/gradle-wrapper.jar:
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https://raw.githubusercontent.com/elec60/ComposeBallsSimulation/HEAD/gradle/wrapper/gradle-wrapper.jar
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/app/src/main/res/mipmap-hdpi/ic_launcher.webp:
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https://raw.githubusercontent.com/elec60/ComposeBallsSimulation/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher.webp
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/app/src/main/res/mipmap-mdpi/ic_launcher.webp:
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https://raw.githubusercontent.com/elec60/ComposeBallsSimulation/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher.webp
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/app/src/main/res/mipmap-xhdpi/ic_launcher.webp:
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https://raw.githubusercontent.com/elec60/ComposeBallsSimulation/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher.webp
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/.idea/vcs.xml:
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/app/src/main/res/mipmap-xxhdpi/ic_launcher.webp:
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https://raw.githubusercontent.com/elec60/ComposeBallsSimulation/HEAD/app/src/main/res/mipmap-xxhdpi/ic_launcher.webp
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/app/src/main/res/mipmap-xxxhdpi/ic_launcher.webp:
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https://raw.githubusercontent.com/elec60/ComposeBallsSimulation/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher.webp
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/app/src/main/res/mipmap-hdpi/ic_launcher_round.webp:
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https://raw.githubusercontent.com/elec60/ComposeBallsSimulation/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher_round.webp
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/app/src/main/res/mipmap-mdpi/ic_launcher_round.webp:
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https://raw.githubusercontent.com/elec60/ComposeBallsSimulation/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher_round.webp
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/app/src/main/res/mipmap-xhdpi/ic_launcher_round.webp:
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https://raw.githubusercontent.com/elec60/ComposeBallsSimulation/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher_round.webp
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/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp:
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https://raw.githubusercontent.com/elec60/ComposeBallsSimulation/HEAD/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp
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/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp:
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https://raw.githubusercontent.com/elec60/ComposeBallsSimulation/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp
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/app/src/main/res/values/themes.xml:
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/gradle/wrapper/gradle-wrapper.properties:
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1 | #Thu Jan 16 13:15:49 CET 2025
2 | distributionBase=GRADLE_USER_HOME
3 | distributionPath=wrapper/dists
4 | distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.2-bin.zip
5 | zipStoreBase=GRADLE_USER_HOME
6 | zipStorePath=wrapper/dists
7 |
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/.gitignore:
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1 | *.iml
2 | .gradle
3 | /local.properties
4 | /.idea/caches
5 | /.idea/libraries
6 | /.idea/modules.xml
7 | /.idea/workspace.xml
8 | /.idea/navEditor.xml
9 | /.idea/assetWizardSettings.xml
10 | .DS_Store
11 | /build
12 | /captures
13 | .externalNativeBuild
14 | .cxx
15 | local.properties
16 |
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/app/src/main/java/com/example/composeballssimulation/Ball.kt:
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1 | package com.example.composeballssimulation
2 |
3 | import androidx.compose.ui.geometry.Offset
4 | import androidx.compose.ui.graphics.Color
5 |
6 | data class Ball(
7 | val position: Offset,
8 | val velocity: Offset,
9 | val radius: Float,
10 | val color: Color
11 | )
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/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml:
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/app/src/main/java/com/example/composeballssimulation/ui/theme/Color.kt:
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1 | package com.example.composeballssimulation.ui.theme
2 |
3 | import androidx.compose.ui.graphics.Color
4 |
5 | val Purple80 = Color(0xFFD0BCFF)
6 | val PurpleGrey80 = Color(0xFFCCC2DC)
7 | val Pink80 = Color(0xFFEFB8C8)
8 |
9 | val Purple40 = Color(0xFF6650a4)
10 | val PurpleGrey40 = Color(0xFF625b71)
11 | val Pink40 = Color(0xFF7D5260)
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/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml:
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/app/src/main/res/values/colors.xml:
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1 |
2 |
3 | #FFBB86FC
4 | #FF6200EE
5 | #FF3700B3
6 | #FF03DAC5
7 | #FF018786
8 | #FF000000
9 | #FFFFFFFF
10 |
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/app/src/test/java/com/example/composeballssimulation/ExampleUnitTest.kt:
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1 | package com.example.composeballssimulation
2 |
3 | import org.junit.Test
4 |
5 | import org.junit.Assert.*
6 |
7 | /**
8 | * Example local unit test, which will execute on the development machine (host).
9 | *
10 | * See [testing documentation](http://d.android.com/tools/testing).
11 | */
12 | class ExampleUnitTest {
13 | @Test
14 | fun addition_isCorrect() {
15 | assertEquals(4, 2 + 2)
16 | }
17 | }
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/app/src/main/res/xml/backup_rules.xml:
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/settings.gradle.kts:
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1 | pluginManagement {
2 | repositories {
3 | google {
4 | content {
5 | includeGroupByRegex("com\\.android.*")
6 | includeGroupByRegex("com\\.google.*")
7 | includeGroupByRegex("androidx.*")
8 | }
9 | }
10 | mavenCentral()
11 | gradlePluginPortal()
12 | }
13 | }
14 | dependencyResolutionManagement {
15 | repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
16 | repositories {
17 | google()
18 | mavenCentral()
19 | }
20 | }
21 |
22 | rootProject.name = "ComposeBallsSimulation"
23 | include(":app")
24 |
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/app/src/main/res/xml/data_extraction_rules.xml:
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/app/proguard-rules.pro:
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1 | # Add project specific ProGuard rules here.
2 | # You can control the set of applied configuration files using the
3 | # proguardFiles setting in build.gradle.
4 | #
5 | # For more details, see
6 | # http://developer.android.com/guide/developing/tools/proguard.html
7 |
8 | # If your project uses WebView with JS, uncomment the following
9 | # and specify the fully qualified class name to the JavaScript interface
10 | # class:
11 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
12 | # public *;
13 | #}
14 |
15 | # Uncomment this to preserve the line number information for
16 | # debugging stack traces.
17 | #-keepattributes SourceFile,LineNumberTable
18 |
19 | # If you keep the line number information, uncomment this to
20 | # hide the original source file name.
21 | #-renamesourcefileattribute SourceFile
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/app/src/androidTest/java/com/example/composeballssimulation/ExampleInstrumentedTest.kt:
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1 | package com.example.composeballssimulation
2 |
3 | import androidx.test.platform.app.InstrumentationRegistry
4 | import androidx.test.ext.junit.runners.AndroidJUnit4
5 |
6 | import org.junit.Test
7 | import org.junit.runner.RunWith
8 |
9 | import org.junit.Assert.*
10 |
11 | /**
12 | * Instrumented test, which will execute on an Android device.
13 | *
14 | * See [testing documentation](http://d.android.com/tools/testing).
15 | */
16 | @RunWith(AndroidJUnit4::class)
17 | class ExampleInstrumentedTest {
18 | @Test
19 | fun useAppContext() {
20 | // Context of the app under test.
21 | val appContext = InstrumentationRegistry.getInstrumentation().targetContext
22 | assertEquals("com.example.composeballssimulation", appContext.packageName)
23 | }
24 | }
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/app/src/main/AndroidManifest.xml:
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5 |
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20 |
21 |
22 |
23 |
24 |
25 |
26 |
27 |
28 |
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/app/src/main/java/com/example/composeballssimulation/ui/theme/Type.kt:
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1 | package com.example.composeballssimulation.ui.theme
2 |
3 | import androidx.compose.material3.Typography
4 | import androidx.compose.ui.text.TextStyle
5 | import androidx.compose.ui.text.font.FontFamily
6 | import androidx.compose.ui.text.font.FontWeight
7 | import androidx.compose.ui.unit.sp
8 |
9 | // Set of Material typography styles to start with
10 | val Typography = Typography(
11 | bodyLarge = TextStyle(
12 | fontFamily = FontFamily.Default,
13 | fontWeight = FontWeight.Normal,
14 | fontSize = 16.sp,
15 | lineHeight = 24.sp,
16 | letterSpacing = 0.5.sp
17 | )
18 | /* Other default text styles to override
19 | titleLarge = TextStyle(
20 | fontFamily = FontFamily.Default,
21 | fontWeight = FontWeight.Normal,
22 | fontSize = 22.sp,
23 | lineHeight = 28.sp,
24 | letterSpacing = 0.sp
25 | ),
26 | labelSmall = TextStyle(
27 | fontFamily = FontFamily.Default,
28 | fontWeight = FontWeight.Medium,
29 | fontSize = 11.sp,
30 | lineHeight = 16.sp,
31 | letterSpacing = 0.5.sp
32 | )
33 | */
34 | )
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/gradle.properties:
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1 | # Project-wide Gradle settings.
2 | # IDE (e.g. Android Studio) users:
3 | # Gradle settings configured through the IDE *will override*
4 | # any settings specified in this file.
5 | # For more details on how to configure your build environment visit
6 | # http://www.gradle.org/docs/current/userguide/build_environment.html
7 | # Specifies the JVM arguments used for the daemon process.
8 | # The setting is particularly useful for tweaking memory settings.
9 | org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
10 | # When configured, Gradle will run in incubating parallel mode.
11 | # This option should only be used with decoupled projects. For more details, visit
12 | # https://developer.android.com/r/tools/gradle-multi-project-decoupled-projects
13 | # org.gradle.parallel=true
14 | # AndroidX package structure to make it clearer which packages are bundled with the
15 | # Android operating system, and which are packaged with your app's APK
16 | # https://developer.android.com/topic/libraries/support-library/androidx-rn
17 | android.useAndroidX=true
18 | # Kotlin code style for this project: "official" or "obsolete":
19 | kotlin.code.style=official
20 | # Enables namespacing of each library's R class so that its R class includes only the
21 | # resources declared in the library itself and none from the library's dependencies,
22 | # thereby reducing the size of the R class for that library
23 | android.nonTransitiveRClass=true
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/app/src/main/java/com/example/composeballssimulation/PhysicsEngine.kt:
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1 | package com.example.composeballssimulation
2 |
3 | import androidx.compose.ui.geometry.Offset
4 | import kotlin.math.sqrt
5 |
6 | object PhysicsEngine {
7 | const val GRAVITY = 800f // Gravity acceleration (scaled for pixels)
8 | const val BOUNCE_FACTOR = 0.65f // Energy loss on bounce (0 = no bounce, 1 = perfect bounce)
9 | const val AIR_FRICTION = 0.98f // Air resistance (1 = no air resistance)
10 | const val GROUND_FRICTION = 0.92f // Ground friction (should be < AIR_FRICTION)
11 | const val MINIMUM_VELOCITY = 10f // Minimum velocity before coming to rest
12 | const val VELOCITY_SLEEP_THRESHOLD = 20f // Velocity threshold for sleep state
13 | const val POSITION_SLEEP_THRESHOLD = 1f // Distance threshold for sleep state
14 |
15 | fun calculateDistance(point1: Offset, point2: Offset): Float {
16 | val dx = point2.x - point1.x
17 | val dy = point2.y - point1.y
18 | return sqrt(dx * dx + dy * dy)
19 | }
20 |
21 | fun normalize(vector: Offset): Offset {
22 | val magnitude = sqrt(vector.x * vector.x + vector.y * vector.y)
23 | return if (magnitude != 0f) {
24 | Offset(vector.x / magnitude, vector.y / magnitude)
25 | } else {
26 | vector
27 | }
28 | }
29 |
30 | fun dotProduct(v1: Offset, v2: Offset): Float {
31 | return v1.x * v2.x + v1.y * v2.y
32 | }
33 |
34 | fun getMagnitude(velocity: Offset): Float {
35 | return sqrt(velocity.x * velocity.x + velocity.y * velocity.y)
36 | }
37 | }
38 |
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/app/src/main/java/com/example/composeballssimulation/MainActivity.kt:
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1 | package com.example.composeballssimulation
2 |
3 | import android.os.Bundle
4 | import androidx.activity.ComponentActivity
5 | import androidx.activity.compose.setContent
6 | import androidx.activity.enableEdgeToEdge
7 | import androidx.compose.foundation.layout.fillMaxSize
8 | import androidx.compose.foundation.layout.padding
9 | import androidx.compose.material3.Scaffold
10 | import androidx.compose.material3.Text
11 | import androidx.compose.runtime.Composable
12 | import androidx.compose.ui.Modifier
13 | import androidx.compose.ui.tooling.preview.Preview
14 | import com.example.composeballssimulation.ui.theme.ComposeBallsSimulationTheme
15 |
16 | class MainActivity : ComponentActivity() {
17 | override fun onCreate(savedInstanceState: Bundle?) {
18 | super.onCreate(savedInstanceState)
19 | enableEdgeToEdge()
20 | setContent {
21 | ComposeBallsSimulationTheme {
22 | Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding ->
23 | BallsSimulation(
24 | modifier = Modifier
25 | .fillMaxSize()
26 | .padding(innerPadding)
27 |
28 | )
29 | }
30 | }
31 | }
32 | }
33 | }
34 |
35 | @Composable
36 | fun Greeting(name: String, modifier: Modifier = Modifier) {
37 | Text(
38 | text = "Hello $name!",
39 | modifier = modifier
40 | )
41 | }
42 |
43 | @Preview(showBackground = true)
44 | @Composable
45 | fun GreetingPreview() {
46 | ComposeBallsSimulationTheme {
47 | Greeting("Android")
48 | }
49 | }
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/app/src/main/res/drawable/ic_launcher_foreground.xml:
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7 |
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15 |