using System;

using OpenTK;

namespace org.niclasundharald.engine.graphics
{
	public class GLScene
	{
		GLSceneOrientation	sceneOrientation;
		ShaderProgram		shader;
		WorldObject			root;

		public GLScene()
		{
			sceneOrientation = GlobalDefaults.instance().ActiveScene;
			shader = GlobalDefaults.instance().DefaultShaderProgram;
			root = new ObjectGroup();
		}

		public GLScene(GLSceneOrientation sceneOrientation)
		{
			this.sceneOrientation = sceneOrientation;
			shader = GlobalDefaults.instance().DefaultShaderProgram;
			root = new ObjectGroup();
		}



		public WorldObject RootObject {
			get { return this.root; }
			set { this.root = value; } 
		}

		public void draw(){
			Matrix4	objectMatrix = Matrix4.Identity;

			shader.use();

			if (root != null){
				draw( objectMatrix, root );
			}
		}

		public void draw(Matrix4 baseMatrix,WorldObject wo){
			Matrix4 objectMatrix = baseMatrix * wo.Transformation;

			Console.WriteLine("draw(): o={0}\noM=\n{1}",wo,objectMatrix);
			shader.setup(objectMatrix, sceneOrientation);

			Model3D m3d = wo.getModel3D();
			if (m3d != null){
				m3d.draw();
			}

			foreach (WorldObject child in wo.Children){
				draw( objectMatrix, child );
			}

		}



	}
}