The DrawIndexed method is used to render indexed geometry using the specified vertex and index buffers, material, and rendering attributes. This method is part of the CommandList class within the Sandbox.Rendering namespace. It allows for efficient rendering of complex models by reusing vertices through indices.
To use the DrawIndexed method, you need to provide the following parameters:
vertexBuffer: A GpuBuffer<T> containing the vertex data.indexBuffer: A GpuBuffer containing the indices that define the order of vertices.material: A Material object that defines the appearance of the rendered geometry.startIndex: An Int32 specifying the starting index in the index buffer.indexCount: An Int32 specifying the number of indices to be used for rendering.attributes: A RenderAttributes object that contains additional rendering settings.primitiveType: A Graphics.PrimitiveType enum value that specifies the type of primitives to render (e.g., triangles, lines).Ensure that the vertex and index buffers are properly populated and that the material is correctly configured before calling this method.
// Example usage of DrawIndexed method
// Assume vertexBuffer and indexBuffer are already created and populated
GpuBuffer<Vertex> vertexBuffer = new GpuBuffer<Vertex>(...);
GpuBuffer indexBuffer = new GpuBuffer(...);
Material material = new Material(...);
RenderAttributes attributes = new RenderAttributes();
// Create a CommandList instance
CommandList commandList = new CommandList();
// Set the primitive type to triangles
Graphics.PrimitiveType primitiveType = Graphics.PrimitiveType.TriangleList;
// Draw the indexed geometry
commandList.DrawIndexed(
vertexBuffer,
indexBuffer,
material,
startIndex: 0,
indexCount: indexBuffer.Count,
attributes: attributes,
primitiveType: primitiveType
);