VoxelParticleSystem.cs

///////////////////////////////////////////////////////////////////////// // // PicaVoxel - The tiny voxel engine for Unity - http://picavoxel.com // By Gareth Williams - @garethiw - http://gareth.pw // // Source code distributed under standard Asset Store licence: // http://unity3d.com/legal/as_terms // ///////////////////////////////////////////////////////////////////////// using System; using UnityEngine; using System.Collections; namespace PicaVoxel { [AddComponentMenu("")] public class VoxelParticleSystem : MonoBehaviour { public static VoxelParticleSystem Instance; public float ParticleLifetime; public int MaxBatchParticles; public ParticleSystem System; public string CollisionTag = "PicaVoxelVolume"; public bool CollidePositiveX; public bool CollideNegativeX; public bool CollidePositiveY; public bool CollideNegativeY; public bool CollidePositiveZ; public bool CollideNegativeZ; public float BounceMultiplier = 0.5f; private ParticleSystem.Particle[] parts; // Use this for initialization private void Start() { if (Instance == null) { Instance = this; } else { Destroy(gameObject); } System = GetComponent<ParticleSystem>(); parts = new ParticleSystem.Particle[System.main.maxParticles]; } // Update is called once per frame private void Update() { int numParts = System.GetParticles(parts); if (numParts > 0 && (CollideNegativeX || CollideNegativeY || CollideNegativeZ || CollidePositiveX || CollidePositiveY || CollidePositiveZ)) { foreach (GameObject o in GameObject.FindGameObjectsWithTag(CollisionTag)) { Volume pvo = o.GetComponent<Volume>(); for (int p=0;p<numParts;p++) { if (CollideNegativeX && parts[p].velocity.x < 0) { Voxel? v = pvo.GetVoxelAtWorldPosition(parts[p].position + new Vector3(-parts[p].GetCurrentSize(System), 0, 0)); if (v.HasValue && v.Value.Active) parts[p].velocity = new Vector3(-(parts[p].velocity.x * BounceMultiplier), parts[p].velocity.y, parts[p].velocity.z); } if (CollidePositiveX && parts[p].velocity.x > 0) { Voxel? v = pvo.GetVoxelAtWorldPosition(parts[p].position + new Vector3(parts[p].GetCurrentSize(System), 0, 0)); if (v.HasValue && v.Value.Active) parts[p].velocity = new Vector3(-(parts[p].velocity.x * BounceMultiplier), parts[p].velocity.y, parts[p].velocity.z); } if (CollideNegativeY && parts[p].velocity.y < 0) { Voxel? v = pvo.GetVoxelAtWorldPosition(parts[p].position + new Vector3(0,-parts[p].GetCurrentSize(System), 0)); if (v.HasValue && v.Value.Active) parts[p].velocity = new Vector3(parts[p].velocity.x, -(parts[p].velocity.y * BounceMultiplier), parts[p].velocity.z); } if (CollidePositiveY && parts[p].velocity.y > 0) { Voxel? v = pvo.GetVoxelAtWorldPosition(parts[p].position + new Vector3(0,parts[p].GetCurrentSize(System), 0)); if (v.HasValue && v.Value.Active) parts[p].velocity = new Vector3(parts[p].velocity.x, -(parts[p].velocity.y * BounceMultiplier), parts[p].velocity.z); } if (CollideNegativeZ && parts[p].velocity.z < 0) { Voxel? v = pvo.GetVoxelAtWorldPosition(parts[p].position + new Vector3(0,0,-parts[p].GetCurrentSize(System))); if (v.HasValue && v.Value.Active) parts[p].velocity = new Vector3(parts[p].velocity.x, parts[p].velocity.y, -(parts[p].velocity.z * BounceMultiplier)); } if (CollidePositiveZ && parts[p].velocity.z > 0) { Voxel? v = pvo.GetVoxelAtWorldPosition(parts[p].position + new Vector3(0,0,parts[p].GetCurrentSize(System))); if (v.HasValue && v.Value.Active) parts[p].velocity = new Vector3(parts[p].velocity.x, parts[p].velocity.y, -(parts[p].velocity.z * BounceMultiplier)); } } } System.SetParticles(parts,numParts); } } public void SpawnSingle(Vector3 worldPos, Voxel voxel, float voxelSize, Vector3 velocity) { System.Emit(new ParticleSystem.EmitParams() { position = worldPos, velocity = velocity, startSize = voxelSize, startLifetime = ParticleLifetime, startColor = voxel.Color }, 1); //worldPos, velocity, voxelSize, ParticleLifetime, voxel.Color)}; } public void SpawnBatch(Batch batch, Func<Vector3, Vector3> velocityFunction) { int step = batch.Voxels.Count/(MaxBatchParticles >= 0 ? MaxBatchParticles : 100); if (step < 1) step = 1; for (int i = 0; i < batch.Voxels.Count; i += step) { SpawnSingle(batch.Voxels[i].WorldPosition, batch.Voxels[i].Voxel, batch.VoxelObject.VoxelSize, velocityFunction(batch.Voxels[i].WorldPosition)); } } } }