The Draw method in the Sandbox.Graphics class is a static method used to render a set of vertices to the screen. This method is designed to work with a vertex buffer, a material, and various rendering attributes to draw a specified number of vertices starting from a given index. The method also allows specifying the type of primitive to render, such as triangles or lines.
To use the Draw method, you need to provide the following parameters:
vertexBuffer: A GpuBuffer<T> containing the vertices to be rendered. This buffer should be properly initialized and filled with vertex data.material: A Material object that defines the appearance of the rendered vertices. This includes shaders and textures.startVertex: An int specifying the index of the first vertex to start rendering from within the vertex buffer.vertexCount: An int indicating the number of vertices to render.attributes: A RenderAttributes object that provides additional rendering settings and parameters.primitiveType: A Graphics.PrimitiveType enum value that specifies the type of primitive to render, such as triangles, lines, or points.// Example usage of the Draw method // Assume vertexBuffer is a GpuBuffer<Vertex> that has been initialized and filled with data GpuBuffer<Vertex> vertexBuffer = new GpuBuffer<Vertex>(...); // Assume material is a Material object that has been set up with shaders and textures Material material = new Material(...); // Define the start vertex and the number of vertices to draw int startVertex = 0; int vertexCount = 100; // Create render attributes RenderAttributes attributes = new RenderAttributes(); // Specify the primitive type Graphics.PrimitiveType primitiveType = Graphics.PrimitiveType.TriangleList; // Draw the vertices Graphics.Draw(vertexBuffer, material, startVertex, vertexCount, attributes, primitiveType);