The Draw method in the Sandbox.Graphics class is a static method used to render a set of vertices to the screen using a specified material and rendering attributes. This method is part of the graphics rendering pipeline and is designed to work with a vertex buffer, allowing for efficient rendering of geometric shapes or models.
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 populated with vertex data before calling the method.material: A Material object that defines the appearance of the rendered vertices. This includes shaders, textures, and other material properties.startVertex: An int specifying the starting index in the vertex buffer from which to begin rendering.vertexCount: An int indicating the number of vertices to render from the vertex buffer.attributes: A RenderAttributes object that provides additional rendering parameters, such as transformation matrices or lighting information.primitiveType: A Graphics.PrimitiveType enum value that specifies the type of primitive to render, such as triangles, lines, or points.This method does not return a value and is typically called within a rendering loop to draw objects to the screen.
// Example usage of the Draw method
GpuBuffer<Vertex> vertexBuffer = new GpuBuffer<Vertex>(vertices);
Material material = new Material("myShader");
int startVertex = 0;
int vertexCount = vertices.Length;
RenderAttributes attributes = new RenderAttributes();
Graphics.PrimitiveType primitiveType = Graphics.PrimitiveType.TriangleList;
// Draw the vertices
Graphics.Draw(vertexBuffer, material, startVertex, vertexCount, attributes, primitiveType);