void Update()
{
// Update Position
trailKernelMat.SetTexture("_PositionBuffer", _positionBuffer[0]);
trailKernelMat.SetBuffer("_BoidDataBuffer", _boidScript.GetBoidDataBuffer());
trailKernelMat.SetInt("_TrailNum", _trailNum);
Graphics.Blit(null, _positionBuffer[1], trailKernelMat, 0);
// Reconstruct Vector
_mrt[0] = _normalBuffer[1].colorBuffer;
_mrt[1] = _binormalBuffer[1].colorBuffer;
Graphics.SetRenderTarget(_mrt, _positionBuffer[1].depthBuffer);
trailKernelMat.SetTexture("_PositionBuffer", _positionBuffer[1]);
trailKernelMat.SetTexture("_NormalBuffer", _normalBuffer[0]);
trailKernelMat.SetTexture("_BinormalBuffer", _binormalBuffer[0]);
Graphics.Blit(null, trailKernelMat, 1);
SwapBuffer(ref _positionBuffer[0], ref _positionBuffer[1]);
SwapBuffer(ref _normalBuffer[0], ref _normalBuffer[1]);
SwapBuffer(ref _binormalBuffer[0], ref _binormalBuffer[1]);
}
void RenderInstancedMesh()
{
if (_renderMat == null || _boidsScript == null || _boidsTrailScript == null || !SystemInfo.supportsInstancing)
{
return;
}
uint numIndices = (_instanceMesh != null) ? (uint)_instanceMesh.GetIndexCount(0) : 0;
args[0] = numIndices;
args[1] = (uint)_boidsScript.GetMaxObjectNum();
_argsBuffer.SetData(args);
_renderMat.SetBuffer("_BoidDataBuffer", _boidsScript.GetBoidDataBuffer());
_renderMat.SetTexture("_PositionBuffer", _boidsTrailScript.GetPositionBuffer());
_renderMat.SetTexture("_NormalBuffer", _boidsTrailScript.GetNormalBuffer());
_renderMat.SetTexture("_BinormalBuffer", _boidsTrailScript.GetBinormalBuffer());
_renderMat.SetFloat("_PathOffset", _pathOffset);
_renderMat.SetFloat("_PathScale", _pathScale);
_renderMat.SetFloat("_Thickness", _thickness);
var bounds = new Bounds
(
_boidsScript.GetSimulationAreaCenter(),
_boidsScript.GetSimulationAreaSize()
);
Graphics.DrawMeshInstancedIndirect
(
_instanceMesh,
0,
_renderMat,
bounds,
_argsBuffer
);
}