public override void Render()
{
Vector3 eyePos = new Vector3();
eyePos.X = cameraAngle.Z * -(float)Math.Sin(cameraAngle.X * rads) * (float)Math.Cos(cameraAngle.Y * rads);
eyePos.Y = cameraAngle.Z * -(float)Math.Sin(cameraAngle.Y * rads);
eyePos.Z = -cameraAngle.Z * (float)Math.Cos(cameraAngle.X * rads) * (float)Math.Cos(cameraAngle.Y * rads);
Matrix4 lookAt = Matrix4.LookAt(eyePos, new Vector3(0.0f, 0.0f, 0.0f), new Vector3(0.0f, 1.0f, 0.0f));
GL.LoadMatrix(Matrix4.Transpose(lookAt).Matrix);
grid.Render();
//set light1 to red
float[] red = new float[] { 1.0f, 0.0f, 0.0f, 1.0f };
GL.Light(LightName.Light1, LightParameter.Diffuse, red);
GL.Light(LightName.Light1, LightParameter.Ambient, red);
Vector3 redPosition = new Vector3();
redPosition.X = 1.0f * -(float)Math.Sin(redAngle.X * rads) * (float)Math.Cos(redAngle.Y * rads);
redPosition.Y = 1.0f * -(float)Math.Sin(redAngle.Y * rads);
redPosition.Z = -1.0f * (float)Math.Cos(redAngle.X * rads) * (float)Math.Cos(redAngle.Y * rads);
Vector3 greenPosition = new Vector3();
greenPosition.X = 1.0f * -(float)Math.Sin(greenAngle.X * rads) * (float)Math.Cos(greenAngle.Y * rads);
greenPosition.Y = 1.0f * -(float)Math.Sin(greenAngle.Y * rads);
greenPosition.Z = -1.0f * (float)Math.Cos(greenAngle.X * rads) * (float)Math.Cos(greenAngle.Y * rads);
GL.Light(LightName.Light1, LightParameter.Position, new float[] { redPosition.X, redPosition.Y, redPosition.Z, 0.0f });
GL.Light(LightName.Light2, LightParameter.Position, new float[] { greenPosition.X, greenPosition.Y, greenPosition.Z, 0.0f });
//add debug visualization
GL.Disable(EnableCap.Lighting);
GL.PushMatrix();
GL.Translate(4f, 4f, 0f);
GL.Begin(PrimitiveType.Lines);
//draw red ray
GL.Color3(1.0f, 0.0f, 0.0f);
GL.Vertex3(0f, 0f, 0f);
redPosition.Normalize();
redPosition *= -1.0f;
GL.Vertex3(redPosition.X, redPosition.Y, redPosition.Z);
//draw green ray
GL.Color3(0.0f, 1.0f, 0.0f);
GL.Vertex3(0.0f, 0.0f, 0.0f);
greenPosition.Normalize();
greenPosition *= -2.0f;
GL.Vertex3(greenPosition.X, greenPosition.Y, greenPosition.Z);
GL.End();
GL.PopMatrix();
//re-enable lights
GL.Enable(EnableCap.Lighting);
GL.Disable(EnableCap.Light0);
GL.Disable(EnableCap.Light2);
//enable red light
GL.Enable(EnableCap.Light1);
//draw torus
GL.Color3(0.0f, 1.0f, 0.0f);
GL.PushMatrix();
{
GL.Translate(0.0f, 2.5f, -2.0f);
Primitives.Torus();
}
GL.PopMatrix();
//only red light is enabled, disable it
GL.Disable(EnableCap.Light1);
//enable green light
GL.Enable(EnableCap.Light2);
//draw sphere
GL.Color3(1.0f, 0.0f, 0.0f);
GL.PushMatrix();
{
GL.Translate(2.5f, 1.0f, -0.5f);
Primitives.DrawSphere();
}
GL.PopMatrix();
//disable green and red lights
GL.Disable(EnableCap.Light2);
//enable blue light
GL.Enable(EnableCap.Light1);
GL.Enable(EnableCap.Light0);
//change color of light 1 to purple from red
float[] purple = new float[] { 1.0f, 0.0f, 1.0f, 1.0f };
GL.Light(LightName.Light1, LightParameter.Diffuse, purple);
GL.Light(LightName.Light1, LightParameter.Ambient, purple);
//specular can stay white
//update position of light1 to static
GL.Light(LightName.Light1, LightParameter.Position, new float[] { 0.0f, -0.5f, -0.5f, 0.0f });
//draw cube
GL.Color3(0.0f, 0.0f, 1.0f);
GL.PushMatrix();
{
GL.Translate(-1.0f, 0.5f, 0.5f);
Primitives.Cube();
}
GL.PopMatrix();
}
public override void Render()
{
Vector3 eyePos = new Vector3();
eyePos.X = cameraAngle.Z * -(float)Math.Sin(cameraAngle.X * rads * (float)Math.Cos(cameraAngle.Y * rads));
eyePos.Y = cameraAngle.Z * -(float)Math.Sin(cameraAngle.Y * rads);
eyePos.Z = -cameraAngle.Z * (float)Math.Cos(cameraAngle.X * rads * (float)Math.Cos(cameraAngle.Y * rads));
Matrix4 lookAt = Matrix4.LookAt(eyePos, new Vector3(0.0f, 0.0f, 0.0f), new Vector3(0.0f, 1.0f, 0.0f));
GL.LoadMatrix(Matrix4.Transpose(lookAt).Matrix);
//set light position
//w of 1 makes the light a point light
float[] position = new float[] { 0.5f, 1.0f, 0.5f, 1.0f };
GL.Light(LightName.Light0, LightParameter.Position, position);
grid.Render(3);
//set ray debug position
Vector3 redPosition = new Vector3();
redPosition.X = 1.0f * -(float)Math.Sin(redAngle.X * rads) * (float)Math.Cos(redAngle.Y * rads);
redPosition.Y = 1.0f * -(float)Math.Sin(redAngle.Y * rads);
redPosition.Z = -1.0f * (float)Math.Cos(redAngle.X * rads) * (float)Math.Cos(redAngle.Y * rads);
Vector3 greenPosition = new Vector3();
greenPosition.X = 1.0f * -(float)Math.Sin(greenAngle.X * rads) * (float)Math.Cos(greenAngle.Y * rads);
greenPosition.Y = 1.0f * -(float)Math.Sin(greenAngle.Y * rads);
greenPosition.Z = -1.0f * (float)Math.Cos(greenAngle.X * rads) * (float)Math.Cos(greenAngle.Y * rads);
//add debug visualization
GL.Disable(EnableCap.Lighting);
GL.PushMatrix();
GL.Translate(4f, 4f, 0f);
GL.Begin(PrimitiveType.Lines);
//draw red ray
GL.Color3(1.0f, 0.0f, 0.0f);
GL.Vertex3(0f, 0f, 0f);
redPosition.Normalize();
redPosition *= -1.0f;
GL.Vertex3(redPosition.X, redPosition.Y, redPosition.Z);
//draw green ray
GL.Color3(0.0f, 1.0f, 0.0f);
GL.Vertex3(0.0f, 0.0f, 0.0f);
greenPosition.Normalize();
greenPosition *= -2.0f;
GL.Vertex3(greenPosition.X, greenPosition.Y, greenPosition.Z);
GL.End();
GL.PopMatrix();
//re-enable lights
GL.Enable(EnableCap.Lighting);
GL.Color3(0.0f, 1.0f, 0.0f);
GL.PushMatrix();
{
GL.Translate(0.0f, 2.5f, -2.0f);
Primitives.Torus();
}
GL.PopMatrix();
GL.Color3(1.0f, 0.0f, 0.0f);
GL.PushMatrix();
{
GL.Translate(2.5f, 1.0f, -0.5f);
Primitives.DrawSphere();
}
GL.PopMatrix();
GL.Color3(0.0f, 0.0f, 1.0f);
GL.PushMatrix();
{
GL.Translate(-1.0f, 0.5f, 0.5f);
Primitives.Cube();
}
GL.PopMatrix();
}