The DrawInstancedIndirect method in the CommandList class is used to render geometry using indirect instancing. This method allows you to draw multiple instances of a set of vertices using a GPU buffer that contains the draw parameters. This is particularly useful for rendering a large number of objects with the same geometry but different transformations or materials, without the need to issue multiple draw calls from the CPU.
To use the DrawInstancedIndirect method, you need to provide the following parameters:
vertexBuffer: A GpuBuffer<T> containing the vertex data for the geometry to be drawn.material: A Material object that defines the appearance of the geometry.indirectBuffer: A GpuBuffer that contains the draw parameters, such as the number of instances to draw.bufferOffset: A UInt32 specifying the offset in the indirect buffer where the draw parameters begin.attributes: A RenderAttributes object that specifies additional rendering attributes.primitiveType: A Graphics.PrimitiveType enum value that specifies the type of primitives to render (e.g., triangles, lines).// Example usage of DrawInstancedIndirect var commandList = new CommandList(); var vertexBuffer = new GpuBuffer<Vertex>(); var material = new Material(); var indirectBuffer = new GpuBuffer(); uint bufferOffset = 0; var attributes = new RenderAttributes(); var primitiveType = Graphics.PrimitiveType.TriangleList; commandList.DrawInstancedIndirect(vertexBuffer, material, indirectBuffer, bufferOffset, attributes, primitiveType);