127 lines
4.4 KiB
C#
127 lines
4.4 KiB
C#
#if UNITY_EDITOR
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using UnityEngine;
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using System.Collections.Generic;
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namespace GSpawn
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{
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public struct PhysicsSimulationConfig
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{
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public bool simulate2D;
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public float simulationTime;
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public float simulationStep;
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public float outOfBoundsYCoord;
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public static readonly PhysicsSimulationConfig defaultConfig = new PhysicsSimulationConfig()
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{
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simulate2D = false,
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simulationTime = 10.0f,
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simulationStep = 0.01f,
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outOfBoundsYCoord = -10.0f,
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};
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}
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public class PhysicsSimulation : Singleton<PhysicsSimulation>
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{
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private List<PhysicsSimulationObjectMono> _simObjects = new List<PhysicsSimulationObjectMono>();
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private PhysicsSimulationConfig _config;
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private float _simulationTime;
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private bool _isRunning;
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public bool isRunning { get { return _isRunning; } }
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public float simulationTime { get { return _simulationTime; } }
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public void performInstantSimulation(PhysicsSimulationConfig config)
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{
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_isRunning = true;
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_config = config;
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_simulationTime = 0.0f;
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if (_config.simulationStep < 0.0f) _config.simulationStep = 0.01f;
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while (_isRunning)
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update();
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}
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public void start(PhysicsSimulationConfig config)
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{
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_isRunning = true;
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_config = config;
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_simulationTime = 0.0f;
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if (_config.simulationStep < 0.0f) _config.simulationStep = 0.01f;
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}
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public void stop()
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{
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if (!_isRunning) return;
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foreach(var simObject in _simObjects)
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PhysicsSimulationObjectMono.DestroyImmediate(simObject);
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_simObjects.Clear();
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_isRunning = false;
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}
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public void addObject(GameObject gameObject)
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{
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var simObject = UndoEx.addComponent<PhysicsSimulationObjectMono>(gameObject);
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simObject.onEnterSimulation();
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_simObjects.Add(simObject);
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}
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public void update()
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{
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if (!_isRunning) return;
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_simulationTime += _config.simulationStep;
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#if UNITY_2022_2_OR_NEWER
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var oldSimulationMode = Physics.simulationMode;
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Physics.simulationMode = SimulationMode.Script;
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Physics.Simulate(_config.simulationStep);
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Physics.simulationMode = oldSimulationMode;
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#else
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Physics.autoSimulation = false;
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Physics.Simulate(_config.simulationStep);
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Physics.autoSimulation = true;
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#endif
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if (_config.simulate2D)
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{
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var oldSimulMode = Physics2D.simulationMode;
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Physics2D.simulationMode = SimulationMode2D.Script;
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Physics2D.Simulate(_config.simulationStep);
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Physics2D.simulationMode = oldSimulMode;
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}
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for (int i = 0; i < _simObjects.Count;)
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{
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var simObject = _simObjects[i];
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// Note: Can happen if Undo/Redo is used.
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if (simObject == null)
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{
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_simObjects.RemoveAt(i);
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continue;
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}
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if (simObject.gameObject.transform.position.y <= _config.outOfBoundsYCoord)
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{
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GameObject.DestroyImmediate(simObject.gameObject);
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_simObjects.RemoveAt(i);
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continue;
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}
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if (simObject.velocity.magnitude < 1e-5f)
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{
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simObject.onExitSimulation();
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PhysicsSimulationObjectMono.DestroyImmediate(simObject);
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_simObjects.RemoveAt(i);
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continue;
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}
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++i;
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}
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if (_simulationTime >= _config.simulationTime ||
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_simObjects.Count == 0) stop();
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}
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}
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}
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#endif |