public override void Render() {
GL.Viewport(0, 0, MainGameWindow.Window.Width, MainGameWindow.Window.Height);
GL.MatrixMode(MatrixMode.Projection);
float aspect = (float)MainGameWindow.Window.Width / (float)MainGameWindow.Window.Height;
Matrix4 perspective = Matrix4.Perspective(60, aspect, 0.01f, 1000.0f);
GL.LoadMatrix(Matrix4.Transpose(perspective).Matrix);
GL.MatrixMode(MatrixMode.Modelview);
GL.LoadIdentity();
Matrix4 lookAt = Matrix4.LookAt(new Vector3(10.0f, 5.0f, 15.0f), new Vector3(0.0f, 0.0f, 0.0f), new Vector3(0.0f, 1.0f, 0.0f));
MatrixStack stack = new MatrixStack();
stack.Load(lookAt);
GL.LoadMatrix(stack.OpenGL);
grid.Render();
DrawPlanets(-1.0f, 1.0f, 0.0f,stack);
}
protected void DrawPlanets(float worldX,float worldY, float worldZ,MatrixStack stack) {
stack.Push();
{
GL.Color3(1.0f, 1.0f, 0.0f);
//sun
Matrix4 scale = Matrix4.Scale(new Vector3(0.5f, 0.5f, 0.5f));
Matrix4 translation = Matrix4.Translate(new Vector3(worldX, worldY, worldZ));
Matrix4 model = translation * scale;
stack.Mul(model);
GL.LoadMatrix(stack.OpenGL);
Circle.DrawSphere(3);
stack.Push();
{
GL.Color3(0.0f, 1.0f, 0.0f);
//first planet
Matrix4 p1scale = Matrix4.Scale(new Vector3(0.8f, 0.8f, 0.8f));
Matrix4 p1rotation = Matrix4.AngleAxis(planet1RotSpeed, 0.0f, 1.0f, 1.0f);
Matrix4 p1translation = Matrix4.Translate(new Vector3(-2.5f, 0.5f, 0.0f));
Matrix4 planet = p1rotation * p1translation * p1scale;
stack.Mul(planet);
GL.LoadMatrix(stack.OpenGL);
Circle.DrawSphere(1);
stack.Push();
{
//draw planet1 moon
GL.Color3(1.0f, 0.0f, 0.0f);
Matrix4 m1Scale = Matrix4.Scale(new Vector3(0.5f, 0.5f, 0.5f));
Matrix4 m1Rotation = Matrix4.AngleAxis(moon1RotSpeed, 0.0f, 1.0f, 0.0f);
Matrix4 m1Translation = Matrix4.Translate(new Vector3(-2.0f, 0.0f, 0.0f));
Matrix4 moon = m1Rotation * m1Translation * m1Scale;
stack.Mul(moon);
GL.LoadMatrix(stack.OpenGL);
Circle.DrawSphere(1);
}
stack.Pop();
}//end first planet
stack.Pop();
stack.Push();
{
//second planet
GL.Color3(0.0f, 0.0f, 1.0f);
Matrix4 pscale = Matrix4.Scale(new Vector3(0.8f, 0.8f, 0.8f));
Matrix4 protation = Matrix4.AngleAxis(planet2RotSpeed, 0.0f, 1.0f, 0.0f);
Matrix4 ptranslation = Matrix4.Translate(new Vector3(12.0f, 0.5f, 0.0f));
Matrix4 planet = protation * ptranslation * pscale;
stack.Mul(planet);
GL.LoadMatrix(stack.OpenGL);
Circle.DrawSphere(1);
stack.Push();
{
//draw planet1 moon
GL.Color3(0.5f, 1.0f, 1.0f);
Matrix4 mScale = Matrix4.Scale(new Vector3(0.5f, 0.5f, 0.5f));
Matrix4 mRotation = Matrix4.AngleAxis(moon2RotSpeed, 1.0f, 1.0f, 1.0f);
Matrix4 mTranslation = Matrix4.Translate(new Vector3(2.0f, 0.0f, 0.0f));
Matrix4 moon = mRotation * mTranslation * mScale;
stack.Mul(moon);
GL.LoadMatrix(stack.OpenGL);
Circle.DrawSphere(1);
}
stack.Pop();
}
stack.Pop();
}
}
