public bool MoveNext()
{
int i;
for (i = startIndex; i < endIndex - _pc.particlesLimit; i++)
{
Vector3 randomVector;
RandomVector((uint)i + 1, out randomVector);
Cross(ref randomVector, ref _particleDataArr[i].basePosition, out randomVector);
randomVector.Normalize();
#if UNITY_2018_1_OR_NEWER && USE_NATIVE_ARRAYS
Vector3 position;
rotate_position(ref _particleDataArr[i].basePosition,
ref randomVector, _particleDataArr[i].rotationSpeed * MillionPointsCPU._time,
out position);
_gpuparticleDataArr[i] = new GPUParticleData(position, _gpuparticleDataArr[i].albedo);
#else
rotate_position(ref _particleDataArr[i].basePosition,
ref randomVector, _particleDataArr[i].rotationSpeed * MillionPointsCPU._time,
out _gpuparticleDataArr[i].position);
#endif
}
var value = i - startIndex;
Interlocked.Add(ref _pc.particlesTransformed, value);
return(false);
}
void InitializeDataForDrawMeshInstancedIndirect()
{
_cpuParticleDataArr = new CPUParticleData[_particleCount];
#if UNITY_2018_1_OR_NEWER && USE_NATIVE_ARRAYS
_gpuparticleDataArr = new NativeArray <GPUParticleData>((int)_particleCount, Allocator.Persistent);
#else
_gpuparticleDataArr = new GPUParticleData[_particleCount];
#endif
_particleDataBuffer = new ComputeBuffer((int)_particleCount, Marshal.SizeOf(typeof(GPUParticleData)));
// set default position
for (int i = 0; i < _particleCount; i++)
{
_cpuParticleDataArr[i].basePosition = new Vector3(Random.Range(-10.0f, 10.0f),
Random.Range(-10.0f, 10.0f), Random.Range(-10.0f, 10.0f));
_cpuParticleDataArr[i].rotationSpeed = Random.Range(1.0f, 100.0f);
}
for (int i = 0; i < _particleCount; i++)
{
_gpuparticleDataArr[i] =
new GPUParticleData(new Vector3(Random.Range(0.0f, 1.0f), Random.Range(0.0f, 1.0f),
Random.Range(0.0f, 1.0f)));
}
// creat point mesh
_pointMesh = new Mesh();
_pointMesh.vertices = new[] { new Vector3(0, 0) };
_pointMesh.normals = new[] { new Vector3(0, 1, 0) };
_pointMesh.SetIndices(new[] { 0 }, MeshTopology.Points, 0);
_GPUInstancingArgsBuffer = new ComputeBuffer(1
, _GPUInstancingArgs.Length * sizeof(uint)
, ComputeBufferType.IndirectArguments);
_GPUInstancingArgs[0] = (_pointMesh != null) ? _pointMesh.GetIndexCount(0) : 0;
_GPUInstancingArgs[1] = _particleCount;
_GPUInstancingArgsBuffer.SetData(_GPUInstancingArgs);
var materialShader = Shader.Find("Custom/MillionPointsCPU");
_material.shader = materialShader;
_material.SetBuffer("_ParticleDataBuffer", _particleDataBuffer);
}
public void Update(int i)
{
Vector3 randomVector;
RandomVector((uint)i + 1, out randomVector);
Cross(ref randomVector, ref _particleDataArr[i].basePosition, out randomVector);
randomVector.Normalize();
#if UNITY_2018_1_OR_NEWER && USE_NATIVE_ARRAYS
Vector3 position;
rotate_position(ref _particleDataArr[i].basePosition,
ref randomVector, _particleDataArr[i].rotationSpeed * MillionPointsCPU._time,
out position);
_gpuparticleDataArr[i] = new GPUParticleData(position, _gpuparticleDataArr[i].albedo);
#else
rotate_position(ref _particleDataArr[i].basePosition,
ref randomVector, _particleDataArr[i].rotationSpeed * MillionPointsCPU._time,
out _gpuparticleDataArr[i].position);
#endif
}
