private unsafe void UpdateIndexBufferCPU(CCommandList cmd, Graphics.CGfxCamera Camera)
{
if (mCpuDrawIndexBuffer == null)
{
return;
}
CBMeshBatch cbMesh = new CBMeshBatch();
{
var pPlanes = stackalloc Plane[6];
Camera.CullingFrustum.GetPlanes(pPlanes);
CBMeshBatch *pCBuffer = &cbMesh;
Plane * planesTar = (Plane *)pCBuffer;
for (uint i = 0; i < 6; i++)
{
planesTar[i] = pPlanes[i];
}
cbMesh.GpuDrivenCameraPosition = Camera.CullingFrustum.TipPos;
BoundingBox box = new BoundingBox();
Camera.CullingFrustum.GetBoundBox(ref box);
cbMesh.GpuDrivenFrustumMinPoint = box.Minimum;
cbMesh.GpuDrivenFrustumMaxPoint = box.Maximum;
cbMesh.MeshBatchVertexStride = (uint)AllVertices.Count;
cbMesh.ClusterNumber = (uint)GpuClusters.Count;
UpdateCBMeshbatch(cmd, Camera);
}
UInt32_3 tri = new UInt32_3();
mDrawIndices.Clear();
for (int i = 0; i < GpuClusters.Count; i++)
{
var cluster = GpuClusters[i];
var GpuDrivenCameraDirection = GpuClusters[i].BoundCenter - cbMesh.GpuDrivenCameraPosition;
var cameraDirInBoundSpace = Vector3.TransposeTransformNormal(GpuDrivenCameraDirection, GpuInstanceDatas[(int)cluster.InstanceId].InvMatrix);
if (FrustumCull(ref cluster, ref cbMesh) == false)
{
UInt64 visBits = 0;
if (cameraDirInBoundSpace.X >= 0)
{
visBits |= cluster.CubeFaces[(int)Cluster.GpuCluster.ECubeFace.CubeFace_NX];
}
else
{
visBits |= cluster.CubeFaces[(int)Cluster.GpuCluster.ECubeFace.CubeFace_X];
}
if (cameraDirInBoundSpace.Y >= 0)
{
visBits |= cluster.CubeFaces[(int)Cluster.GpuCluster.ECubeFace.CubeFace_NY];
}
else
{
visBits |= cluster.CubeFaces[(int)Cluster.GpuCluster.ECubeFace.CubeFace_Y];
}
if (cameraDirInBoundSpace.Z >= 0)
{
visBits |= cluster.CubeFaces[(int)Cluster.GpuCluster.ECubeFace.CubeFace_NZ];
}
else
{
visBits |= cluster.CubeFaces[(int)Cluster.GpuCluster.ECubeFace.CubeFace_Z];
}
uint InstanceStartIndex = cbMesh.MeshBatchVertexStride * cluster.InstanceId;
for (int j = 0; j < cluster.FaceCount; j++)
{
if (TestBit(visBits, j) == false)
{
continue;
}
int srcIndex = (int)(cluster.StartFaceIndex + j) * 3;
tri.x = InstanceStartIndex + AllIndices[srcIndex];
tri.y = InstanceStartIndex + AllIndices[srcIndex + 1];
tri.z = InstanceStartIndex + AllIndices[srcIndex + 2];
mDrawIndices.Add(tri);
}
}
}
mDrawArgs.InstanceCount = 1;
mDrawArgs.IndexCountPerInstance = (uint)mDrawIndices.Count * 3;
uint size = (uint)(mDrawIndices.Count * sizeof(UInt32_3));
if (mCpuDrawIndexBuffer.Desc.ByteWidth > size)
{
mCpuDrawIndexBuffer.UpdateBuffData(cmd, mDrawIndices.GetBufferPtr(), size);
}
}
public void UpdateGeomMesh(CRenderContext rc, float halfWidth = 0.1F)
{
if (GeomMesh == null)
{
return;
}
CDrawPrimitiveDesc dpDesc = new CDrawPrimitiveDesc();
dpDesc.SetDefault();
if (UseGeometry)
{
mTempPosition.Clear();
mTempUV.Clear();
LinesGen.BuildGraph(mTempPosition, mTempUV, halfWidth);
mTempNormal.Clear();
mTempNormal.SetGrowStep(mTempPosition.Count);
for (int i = 0; i < mTempPosition.Count; i++)
{
//mTempNormal.Add(mTempPosition[i].CalcNormals());
unsafe
{
LinePosition tempNorm = new LinePosition();
var ptr = (LinePosition *)mTempPosition.UnsafeAddressAt(i).ToPointer();
ptr->CalcNormals(ref tempNorm);
mTempNormal.Add(tempNorm);
}
}
dpDesc.StartIndex = 0xFFFFFFFF;
if (halfWidth == 0)
{
dpDesc.PrimitiveType = EPrimitiveType.EPT_LineList;
dpDesc.NumPrimitives = (UInt32)(mTempPosition.Count * 3 * 3);
}
else
{
dpDesc.NumPrimitives = (UInt32)(mTempPosition.Count * 3 * 2);
}
GeomMesh.SetAtom(0, 0, ref dpDesc);
unsafe
{
GeomMesh.SetGeomtryMeshStream(rc, EVertexSteamType.VST_Position, mTempPosition.GetBufferPtr(),
(UInt32)(sizeof(LinePosition) * mTempPosition.Count), (UInt32)sizeof(Vector3), 0);
GeomMesh.SetGeomtryMeshStream(rc, EVertexSteamType.VST_Normal, mTempNormal.GetBufferPtr(),
(UInt32)(sizeof(LinePosition) * mTempNormal.Count), (UInt32)sizeof(Vector3), 0);
GeomMesh.SetGeomtryMeshStream(rc, EVertexSteamType.VST_UV, mTempUV.GetBufferPtr(),
(UInt32)(sizeof(LineUV) * mTempUV.Count), (UInt32)sizeof(Vector2), 0);
}
}
else
{
mTempPosition.Clear();
mTempUV.Clear();
LinesGen.BuildGraph(mTempPosition, mTempUV, halfWidth);
mTempNormal.Clear();
mTempNormal.SetGrowStep(mTempPosition.Count);
for (int i = 0; i < mTempPosition.Count; i++)
{
//mTempNormal.Add(mTempPosition[i].CalcNormals());
unsafe
{
LinePosition tempNorm = new LinePosition();
var ptr = (LinePosition *)mTempPosition.UnsafeAddressAt(i).ToPointer();
ptr->CalcNormals(ref tempNorm);
mTempNormal.Add(tempNorm);
}
}
dpDesc.StartIndex = 0xFFFFFFFF;
if (halfWidth == 0)
{
dpDesc.PrimitiveType = EPrimitiveType.EPT_LineList;
dpDesc.NumPrimitives = (UInt32)(mTempPosition.Count * 3);
}
else
{
dpDesc.NumPrimitives = (UInt32)(mTempPosition.Count * 2);
}
GeomMesh.SetAtom(0, 0, ref dpDesc);
unsafe
{
GeomMesh.SetGeomtryMeshStream(rc, EVertexSteamType.VST_Position, mTempPosition.GetBufferPtr(),
(UInt32)(sizeof(LinePosition) * mTempPosition.Count), (UInt32)sizeof(Vector3), 0);
GeomMesh.SetGeomtryMeshStream(rc, EVertexSteamType.VST_Normal, mTempNormal.GetBufferPtr(),
(UInt32)(sizeof(LinePosition) * mTempNormal.Count), (UInt32)sizeof(Vector3), 0);
GeomMesh.SetGeomtryMeshStream(rc, EVertexSteamType.VST_UV, mTempUV.GetBufferPtr(),
(UInt32)(sizeof(LineUV) * mTempUV.Count), (UInt32)sizeof(Vector2), 0);
}
}
GeomMesh.AABB = LinesGen.AABB;
GeomMesh.GeometryMesh.Dirty = true;
}
