private SceneNodeBase GetRootElement()
{
//var lightPosition = new vec3(0, 3, 5) * 2;
//var localLight = new SpotLight(lightPosition, new vec3(0, 0, 0), 60, 1, 500) { Color = new vec3(1, 1, 1), };
//var lightContainer = new LightContainerNode(localLight);
var group = new GroupNode();
{
{
var teapot = DepthTeapotNode.Create();
teapot.RotateSpeed = 1;
group.Children.Add(teapot);
//lightContainer.Children.Add(teapot);
}
{
var ground = DepthGroundNode.Create();
ground.Color = Color.Gray.ToVec4();
ground.Scale *= 30;
ground.WorldPosition = new vec3(0, -3, 0);
group.Children.Add(ground);
//lightContainer.Children.Add(ground);
}
}
//var rectangle = RectangleNode.Create();
//rectangle.TextureSource = localLight;
//group.Children.Add(lightContainer);
//group.Children.Add(rectangle);
return(group);
}
// this fragment shader is not needed.
// private const string fragmentCode =
// @"#version 330 core
//
//out float fragmentdepth;
//
//void main(void) {
// fragmentdepth = gl_FragCoord.z;
//}
//";
/// <summary>
/// Render teapot to framebuffer in modern opengl.
/// </summary>
/// <returns></returns>
public static DepthTeapotNode Create()
{
RenderMethodBuilder shadowmapBuilder;
{
var vs = new VertexShader(vertexCode);
var provider = new ShaderArray(vs);
var map = new AttributeMap();
map.Add(inPosition, Teapot.strPosition);
shadowmapBuilder = new RenderMethodBuilder(provider, map);
}
var model = new Teapot();
var node = new DepthTeapotNode(model, shadowmapBuilder);
node.Initialize();
return(node);
}