private SceneNodeBase GetRootNode()
{
var groupNode = new GroupNode();
{
var node = CubeNode.Create();
node.Scale = new vec3(1, 1, 1) * 4;
groupNode.Children.Add(node);
}
{
var node = TeapotNode.Create();
node.RenderWireframe = false;
groupNode.Children.Add(node);
}
return(groupNode);
}
public static CubeNode Create()
{
// vertex buffer and index buffer.
var model = new CubeModel();
// vertex shader and fragment shader.
var vs = new VertexShader(vertexCode);
var fs = new FragmentShader(fragmentCode);
var array = new ShaderArray(vs, fs);
// which vertex buffer maps to which attribute in shader.
var map = new AttributeMap();
map.Add("inPosition", CubeModel.strPosition);
// build a render method.
var builder = new RenderMethodBuilder(array, map);
// create node.
var node = new CubeNode(model, builder);
// initialize node.
node.Initialize();
return(node);
}