public static void SetCullingBuffer(ref CullingBuffers buffers)
{
buffers.cullingShader.SetBuffer(buffers.csmainKernel, ShaderIDs.allBounds, buffers.allBoundBuffer);
buffers.cullingShader.SetBuffer(buffers.csmainKernel, ShaderIDs.Transforms, buffers.resultBuffer);
buffers.cullingShader.SetBuffer(buffers.csmainKernel, ShaderIDs.sizeBuffer, buffers.sizeBuffer);
buffers.sizeBuffer.SetData(ComputeShaderUtility.zero);
}
public static void Dispose(ref CullingBuffers buffers)
{
buffers.allBoundBuffer.Dispose();
buffers.resultBuffer.Dispose();
buffers.sizeBuffer.Dispose();
buffers.vertexBuffer.Dispose();
buffers.lastFrameMatricesBuffer.Dispose();
}
public static void SetLastFrameMatrix(ref CullingBuffers cullingBuffers, ref Matrix4x4 lastVP)
{
if (cullingBuffers.currentCullingResult > 0)
{
cullingBuffers.cullingShader.SetMatrix(ShaderIDs.LAST_VP_MATRIX, lastVP);
cullingBuffers.cullingShader.SetBuffer(cullingBuffers.lastMatricesKernel, ShaderIDs.Transforms, cullingBuffers.resultBuffer);
cullingBuffers.cullingShader.SetBuffer(cullingBuffers.lastMatricesKernel, ShaderIDs.lastFrameMatrices, cullingBuffers.lastFrameMatricesBuffer);
ComputeShaderUtility.Dispatch(cullingBuffers.cullingShader, cullingBuffers.lastMatricesKernel, cullingBuffers.currentCullingResult, THREADGROUPCOUNT);
}
}
public static void DrawNoMotionVectors(ref CullingBuffers cullingBuffers, Material proceduralMaterial)
{
int instanceCount = cullingBuffers.currentCullingResult;
if (instanceCount == 0)
{
return;
}
geometryCommandBuffer.SetGlobalBuffer(ShaderIDs.Transforms, cullingBuffers.resultBuffer);
geometryCommandBuffer.SetGlobalBuffer(ShaderIDs.VertexBuffer, cullingBuffers.vertexBuffer);
geometryCommandBuffer.DrawProcedural(Matrix4x4.identity, proceduralMaterial, 0, MeshTopology.Triangles, cullingBuffers.vertexBuffer.count, instanceCount);
}
public static void InitBuffers(ref CullingBuffers buffers, Vector3[] boundExtents, Matrix4x4[] localToWorldMatrices, Mesh mesh)
{
buffers.sizeBuffer = new ComputeBuffer(1, INTSIZE);
buffers.allBoundBuffer = new ComputeBuffer(boundExtents.Length, Bounds.SIZE);
buffers.resultBuffer = new ComputeBuffer(boundExtents.Length, TRANSFORMSIZE);
buffers.csmainKernel = buffers.cullingShader.FindKernel("CSMain");
buffers.lastMatricesKernel = buffers.cullingShader.FindKernel("GetLast");
buffers.lastFrameMatricesBuffer = new ComputeBuffer(boundExtents.Length, MATRIXSIZE);
buffers.count = boundExtents.Length;
buffers.currentCullingResult = 0;
Bounds[] allBounds = new Bounds[boundExtents.Length];
for (int i = 0; i < allBounds.Length; ++i)
{
allBounds[i].extent = boundExtents[i];
allBounds[i].localToWorldMatrix = localToWorldMatrices[i];
}
buffers.allBoundBuffer.SetData(allBounds);
Vector3[] allVertex = mesh.vertices;
int[] allIndices = mesh.triangles;
Vector2[] allUVs = mesh.uv;
Vector4[] tangents = mesh.tangents;
Vector3[] normals = mesh.normals;
Point[] points = new Point[allIndices.Length];
for (int i = 0; i < allIndices.Length; ++i)
{
Point p;
int index = allIndices[i];
p.normal = normals[index];
p.vertex = allVertex[index];
p.texcoord = allUVs[index];
p.tangent = tangents[index];
points[i] = p;
}
buffers.vertexBuffer = new ComputeBuffer(points.Length, Point.SIZE);
buffers.vertexBuffer.SetData(points);
}
/// <summary>
/// Run Culling With Compute Shader
/// </summary>
/// <param name="view"></param> World To View Matrix
/// <param name="proj"></param> View To NDC Matrix
/// <param name="buffers"></param> Buffers
public static void RunCulling(ref Matrix4x4 view, ref Matrix4x4 proj, ref Matrix4x4 rtProj, ref CullingBuffers buffers)
{
Matrix4x4 vp = proj * view;
buffers.cullingShader.SetMatrix(ShaderIDs._VPMatrix, rtProj * view);
GetCullingPlanes(ref vp, planes);
for (int i = 0; i < 6; ++i)
{
Vector3 normal = planes[i].normal;
float distance = planes[i].distance;
planesVector[i] = new Vector4(normal.x, normal.y, normal.z, distance);
}
buffers.cullingShader.SetVectorArray(ShaderIDs.planes, planesVector);
ComputeShaderUtility.Dispatch(buffers.cullingShader, buffers.csmainKernel, buffers.count, THREADGROUPCOUNT);
buffers.currentCullingResult = (int)GetCullingBufferResult(ref buffers);
}
public static uint GetCullingBufferResult(ref CullingBuffers buffers)
{
buffers.sizeBuffer.GetData(currentDrawSize);
return(currentDrawSize[0]);
}
