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MelvMay-UnityMelvMay-Unity
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Add "Compound" scene.
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‎LowLevel/Sandbox/Assets/Sandbox.unity

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@@ -395,6 +395,11 @@ MonoBehaviour:
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Name: Chain Shape
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Category: Shapes
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Description: Demonstrates how a Chain Shape doesn't produce "ghost" collisions.
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- ScenePath: Assets/Scenes/Shapes/Compound/Compound.unity
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Name: Compound
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Category: Shapes
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Description: Demonstrates how multiple shapes on a single body produce a compound
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shape and how to mitigate overlaps.
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- ScenePath: Assets/Scenes/Shapes/EllipsePolygons/EllipsePolygons.unity
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Name: Ellipse Polygons
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Category: Shapes

‎LowLevel/Sandbox/Assets/Scenes/Shapes/Compound.meta

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‎LowLevel/Sandbox/Assets/Scenes/Shapes/Compound/Compound.cs

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using Unity.Collections;
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using UnityEngine;
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using UnityEngine.LowLevelPhysics2D;
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using UnityEngine.UIElements;
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public class Compound : MonoBehaviour
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{
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private SandboxManager m_SandboxManager;
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private SceneManifest m_SceneManifest;
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private UIDocument m_UIDocument;
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private CameraManipulator m_CameraManipulator;
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private PhysicsWorld m_PhysicsWorld;
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private Button m_IntrudeShapeButton;
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private PhysicsBody m_Table1;
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private PhysicsBody m_Table2;
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private PhysicsBody m_Ship1;
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private PhysicsBody m_Ship2;
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private void OnEnable()
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{
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m_SandboxManager = FindFirstObjectByType<SandboxManager>();
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m_SceneManifest = FindFirstObjectByType<SceneManifest>();
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m_UIDocument = GetComponent<UIDocument>();
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m_CameraManipulator = FindFirstObjectByType<CameraManipulator>();
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m_CameraManipulator.CameraSize = 15;
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m_CameraManipulator.CameraPosition = new Vector2(0f, 9f);
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// Set up the scene reset action.
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m_SandboxManager.SceneResetAction = SetupScene;
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// Set Overrides.
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m_SandboxManager.SetOverrideColorShapeState(false);
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m_PhysicsWorld = PhysicsWorld.defaultWorld;
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SetupOptions();
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SetupScene();
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}
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private void OnDisable()
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{
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// Reset overrides.
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m_SandboxManager.ResetOverrideColorShapeState();
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}
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private void SetupOptions()
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{
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var root = m_UIDocument.rootVisualElement;
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{
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// Menu Region (for camera manipulator).
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var menuRegion = root.Q<VisualElement>("menu-region");
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menuRegion.RegisterCallback<PointerEnterEvent>(_ => ++m_CameraManipulator.OverlapUI);
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menuRegion.RegisterCallback<PointerLeaveEvent>(_ => --m_CameraManipulator.OverlapUI);
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// Intrude Shape.
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m_IntrudeShapeButton = root.Q<Button>("intrude-shape");
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m_IntrudeShapeButton.clicked += IntrudeShape;
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// Reset Scene.
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var resetScene = root.Q<Button>("reset-scene");
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resetScene.clicked += SetupScene;
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// Fetch the scene description.
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var sceneDescription = root.Q<Label>("scene-description");
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sceneDescription.text = $"\"{m_SceneManifest.LoadedSceneName}\"\n{m_SceneManifest.LoadedSceneDescription}";
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}
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}
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private void SetupScene()
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{
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// Reset the scene state.
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m_SandboxManager.ResetSceneState();
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var bodies = m_SandboxManager.Bodies;
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// Ground.
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{
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var body = m_PhysicsWorld.CreateBody();
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bodies.Add(body);
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using var vertices = new NativeList<Vector2>(Allocator.Temp)
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{
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new(-25f, 0f),
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new(-25f, 23f),
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new(25f, 23f),
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new(25f, 0f)
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};
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body.CreateChain(new ChainGeometry(vertices.AsArray()), PhysicsChainDefinition.defaultDefinition);
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}
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// Table 1.
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{
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m_Table1 = m_PhysicsWorld.CreateBody(new PhysicsBodyDefinition { bodyType = RigidbodyType2D.Dynamic, position = new Vector2(-15f, 1f) });
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bodies.Add(m_Table1);
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m_Table1.CreateShape(PolygonGeometry.CreateBox(new Vector2(6f, 1f), 0f, new Vector2(0f, 3.5f)));
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m_Table1.CreateShape(PolygonGeometry.CreateBox(new Vector2(1f, 3f), 0f, new Vector2(-2.5f, 1.5f)));
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m_Table1.CreateShape(PolygonGeometry.CreateBox(new Vector2(1f, 3f), 0f, new Vector2(2.5f, 1.5f)));
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}
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// Table 2.
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{
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m_Table2 = m_PhysicsWorld.CreateBody(new PhysicsBodyDefinition { bodyType = RigidbodyType2D.Dynamic, position = new Vector2(-5f, 1f) });
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bodies.Add(m_Table2);
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m_Table2.CreateShape(PolygonGeometry.CreateBox(new Vector2(6f, 1f), 0f, new Vector2(0f, 3.5f)));
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m_Table2.CreateShape(PolygonGeometry.CreateBox(new Vector2(1f, 4f), 0f, new Vector2(-2.5f, 2f)));
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m_Table2.CreateShape(PolygonGeometry.CreateBox(new Vector2(1f, 4f), 0f, new Vector2(2.5f, 2f)));
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}
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// Spaceship 1.
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{
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m_Ship1 = m_PhysicsWorld.CreateBody(new PhysicsBodyDefinition { bodyType = RigidbodyType2D.Dynamic, position = new Vector2(5f, 1f) });
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bodies.Add(m_Ship1);
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{
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using var vertices = new NativeList<Vector2>(Allocator.Temp)
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{
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new(-2f, 0f),
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new(0f, 4f / 3f),
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new(0f, 4f)
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};
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m_Ship1.CreateShape(PolygonGeometry.Create(vertices.AsArray()));
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}
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{
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using var vertices = new NativeList<Vector2>(Allocator.Temp)
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{
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new(2f, 0f),
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new(0f, 4f / 3f),
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new(0f, 4f)
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};
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m_Ship1.CreateShape(PolygonGeometry.Create(vertices.AsArray()));
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}
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}
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// Spaceship 2.
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{
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m_Ship2 = m_PhysicsWorld.CreateBody(new PhysicsBodyDefinition { bodyType = RigidbodyType2D.Dynamic, position = new Vector2(15f, 1f) });
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bodies.Add(m_Ship2);
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{
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using var vertices = new NativeList<Vector2>(Allocator.Temp)
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{
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new(-2f, 0f),
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new(1f, 2f),
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new(0f, 4f)
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};
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m_Ship2.CreateShape(PolygonGeometry.Create(vertices.AsArray()));
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}
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{
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using var vertices = new NativeList<Vector2>(Allocator.Temp)
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{
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new(2f, 0f),
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new(-1f, 2f),
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new(0f, 4f)
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};
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m_Ship2.CreateShape(PolygonGeometry.Create(vertices.AsArray()));
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}
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}
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}
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private void IntrudeShape()
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{
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var bodies = m_SandboxManager.Bodies;
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// Table 1 intrusion.
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{
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var body = m_PhysicsWorld.CreateBody(new PhysicsBodyDefinition { bodyType = RigidbodyType2D.Dynamic, position = m_Table1.position, rotation = m_Table1.rotation });
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bodies.Add(body);
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body.CreateShape(PolygonGeometry.CreateBox(new Vector2(8f, 0.2f), 0f, new Vector2(0f, 3.0f)));
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}
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// Table 2 intrusion.
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{
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var body = m_PhysicsWorld.CreateBody(new PhysicsBodyDefinition { bodyType = RigidbodyType2D.Dynamic, position = m_Table2.position, rotation = m_Table2.rotation });
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bodies.Add(body);
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body.CreateShape(PolygonGeometry.CreateBox(new Vector2(8f, 0.2f), 0f, new Vector2(0f, 3.0f)));
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}
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// Ship 1 intrusion.
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{
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var body = m_PhysicsWorld.CreateBody(new PhysicsBodyDefinition { bodyType = RigidbodyType2D.Dynamic, position = m_Ship1.position, rotation = m_Ship1.rotation });
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bodies.Add(body);
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body.CreateShape(new CircleGeometry { center = new Vector2(0f, 2f), radius = 0.5f });
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}
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// Ship 2 intrusion.
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{
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var body = m_PhysicsWorld.CreateBody(new PhysicsBodyDefinition { bodyType = RigidbodyType2D.Dynamic, position = m_Ship2.position, rotation = m_Ship2.rotation });
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bodies.Add(body);
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body.CreateShape(new CircleGeometry { center = new Vector2(0f, 2f), radius = 0.5f });
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}
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}
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private void Update()
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{
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DrawBodyBounds(m_Table1, Color.red);
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DrawBodyBounds(m_Table2, Color.cyan);
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DrawBodyBounds(m_Ship1, Color.red);
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DrawBodyBounds(m_Ship2, Color.cyan);
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}
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private void DrawBodyBounds(PhysicsBody body, Color color)
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{
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if (!body.isValid)
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return;
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// Calculate the body AABB.
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var aabb = body.GetAABB();
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// Draw the AABB.
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m_PhysicsWorld.DrawBox(aabb.center, aabb.extents * 2f, 0f, color);
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}
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}

‎LowLevel/Sandbox/Assets/Scenes/Shapes/Compound/Compound.cs.meta

Lines changed: 2 additions & 0 deletions
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