public unsafe bool BuildClusterFromMeshSource(CRenderContext rc, RName meshSourceName)
{
Graphics.Mesh.CGfxMeshDataProvider meshSource = new Graphics.Mesh.CGfxMeshDataProvider();
var meshPrimitive = CEngine.Instance.MeshPrimitivesManager.GetMeshPrimitives(rc, meshSourceName, true);
meshSource.InitFromMesh(rc, meshPrimitive);
uint a, b, c;
a = 0;
b = 0;
c = 0;
List <Cluster> clusterArray = new List <Cluster>();
int vertNum = meshSource.VertexNumber;
Vector3 *pPos = (Vector3 *)meshSource.GetVertexPtr(EVertexSteamType.VST_Position, 0).ToPointer();
Vector3 *pNor = (Vector3 *)meshSource.GetVertexPtr(EVertexSteamType.VST_Normal, 0).ToPointer();
Vector4 *pTan = (Vector4 *)meshSource.GetVertexPtr(EVertexSteamType.VST_Tangent, 0).ToPointer();
Vector2 *pDiffUV = (Vector2 *)meshSource.GetVertexPtr(EVertexSteamType.VST_UV, 0).ToPointer();
GpuSceneVertex vert = new GpuSceneVertex();
for (int i = 0; i < vertNum; i++)
{
vert.Reset();
if (pPos != null)
{
vert.Position = pPos[i];
}
if (pNor != null)
{
vert.Normal = pNor[i];
}
if (pTan != null)
{
vert.Tangent = pTan[i];
}
if (pDiffUV != null)
{
vert.DiffuseU = pDiffUV[i].X;
vert.DiffuseV = pDiffUV[i].Y;
}
MeshVertices.Add(vert);
}
for (int i = 0; i < meshSource.TriangleNumber; i++)
{
meshSource.GetTriangle(i, ref a, ref b, ref c);
IndexBuffer.Add(a);
IndexBuffer.Add(b);
IndexBuffer.Add(c);
}
Cluster curCluster = null;
Vector3 *pPosPtr = (Vector3 *)meshSource.GetVertexPtr(EVertexSteamType.VST_Position, 0).ToPointer();
for (uint i = 0; i < meshSource.AtomNumber; i++)
{
CDrawPrimitiveDesc desc = meshSource[i, 0];
if (desc.PrimitiveType != EPrimitiveType.EPT_TriangleList)
{
return(false);
}
uint startFace = desc.StartIndex / 3;
for (uint j = 0; j < desc.NumPrimitives; j++)
{
if (curCluster == null || curCluster.Data.FaceCount >= 64)
{
curCluster = new Cluster();
curCluster.Data.InstanceId = i;
curCluster.Data.StartFaceIndex = startFace;
curCluster.Data.FaceCount = 0;
clusterArray.Add(curCluster);
}
startFace++;
curCluster.Data.FaceCount++;
}
}
ClusterDatas.Clear();
for (int i = 0; i < clusterArray.Count; i++)
{
clusterArray[i].Proccess(pPosPtr, IndexBuffer);
ClusterDatas.Add(clusterArray[i].Data);
}
return(true);
}