void Start()
{
_trailNum = _boidScript.GetMaxObjectNum();
CreateBuffer(ref _positionBuffer);
CreateBuffer(ref _normalBuffer);
CreateBuffer(ref _binormalBuffer);
_mrt = new RenderBuffer[2];
}
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
);
}