unsafe public OcclusionMesh(ref OcclusionMeshAsset sharedMesh, Occluder occluder)
{
vertexCount = sharedMesh.vertexCount;
indexCount = sharedMesh.indexCount;
vertexData = sharedMesh.vertexData;
indexData = sharedMesh.indexData;
int size = UnsafeUtility.SizeOf <float4>() * vertexCount;
var data = Memory.Unmanaged.Allocate(size, 64, Allocator.Persistent);
transformedVertexData = BlobAssetReference <float4> .Create(data, size);
screenMin = float.MaxValue;
screenMax = -float.MaxValue;
localToWorld = occluder.localTransform;
}
unsafe protected void AddComponents(Entity entity, Mesh mesh, int submeshIndex)
{
var subMesh = mesh.GetSubMesh(submeshIndex);
var verts = mesh.vertices;
var occlusionMeshAsset = new OcclusionMeshAsset();
var vertices = new NativeArray <float4>(subMesh.vertexCount, Allocator.Temp);
for (int i = 0; i < subMesh.vertexCount; ++i)
{
vertices[i] = new float4(verts[i + subMesh.firstVertex], 1.0f);
}
occlusionMeshAsset.vertexCount = subMesh.vertexCount;
occlusionMeshAsset.vertexData = BlobAssetReference <float4> .Create(
vertices.GetUnsafeReadOnlyPtr(), sizeof(float4) *vertices.Length);
vertices.Dispose();
var indices = new NativeArray <int>(subMesh.indexCount, Allocator.Temp);
fixed(int *srcIndices = mesh.triangles)
{
for (int i = 0; i < indices.Length; i++)
{
indices[i] = srcIndices[subMesh.indexStart + i] - subMesh.firstVertex;
if (indices[i] < 0 || indices[i] > subMesh.vertexCount)
{
Debug.Log($"broken index at {i}: {indices[i]}");
}
}
}
occlusionMeshAsset.indexCount = indices.Length;
occlusionMeshAsset.indexData = BlobAssetReference <int> .Create(
indices.GetUnsafeReadOnlyPtr(), sizeof(int) *indices.Length);
indices.Dispose();
DstEntityManager.AddComponentData(entity, occlusionMeshAsset);
}