public RenderInformation(Material material, Entity bufferEntity)
{
this.material = material;
spriteCount = SpriteSheetCache.GetLength(material);
this.bufferEntity = bufferEntity;
args = new uint[5] {
0, 0, 0, 0, 0
};
argsBuffer = new ComputeBuffer(1, args.Length * sizeof(uint), ComputeBufferType.IndirectArguments);
// those args are always the same since we always use the same mesh
args[0] = (uint)6;
args[2] = args[3] = (uint)0;
updateUvs = true;
}
// we should only update the index of the changed datas for
// indexBuffer, matrixBuffer, and colorBuffer inside a bursted
// job to avoid overhead
private int UpdateBuffers(int renderIndex)
{
SpriteSheetManager.ReleaseBuffer(renderIndex);
RenderInformation renderInformation = SpriteSheetManager.renderInformation[renderIndex];
int instanceCount = EntityManager.GetBuffer <SpriteIndexBuffer>(renderInformation.bufferEntity).Length;
if (instanceCount > 0)
{
if (renderInformation.updateUvs)
{
int stride = instanceCount >= 16 ? 16 : 16 * SpriteSheetCache.GetLength(renderInformation.material);
SpriteSheetManager.ReleaseUvBuffer(renderIndex);
renderInformation.uvBuffer = new ComputeBuffer(instanceCount, stride);
renderInformation.uvBuffer.SetData(EntityManager.GetBuffer <UvBuffer>(renderInformation.bufferEntity).Reinterpret <float4>().AsNativeArray());
renderInformation.material.SetBuffer("uvBuffer", renderInformation.uvBuffer);
renderInformation.updateUvs = false;
}
renderInformation.indexBuffer = new ComputeBuffer(instanceCount, sizeof(int));
renderInformation.indexBuffer.SetData(EntityManager.GetBuffer <SpriteIndexBuffer>(renderInformation.bufferEntity).Reinterpret <int>().AsNativeArray());
renderInformation.material.SetBuffer("indexBuffer", renderInformation.indexBuffer);
renderInformation.matrixBuffer = new ComputeBuffer(instanceCount, 16);
renderInformation.matrixBuffer.SetData(EntityManager.GetBuffer <MatrixBuffer>(renderInformation.bufferEntity).Reinterpret <float4>().AsNativeArray());
renderInformation.material.SetBuffer("matrixBuffer", renderInformation.matrixBuffer);
renderInformation.args[1] = (uint)instanceCount;
renderInformation.argsBuffer.SetData(renderInformation.args);
renderInformation.colorsBuffer = new ComputeBuffer(instanceCount, 16);
renderInformation.colorsBuffer.SetData(EntityManager.GetBuffer <SpriteColorBuffer>(renderInformation.bufferEntity).Reinterpret <float4>().AsNativeArray());
renderInformation.material.SetBuffer("colorsBuffer", renderInformation.colorsBuffer);
}
return(instanceCount);
}