// tick for OpenGL rendering code
public void RenderGL()
{
HandleInput();
// measure frame duration
float frameDuration = timer.ElapsedMilliseconds;
timer.Reset();
timer.Start();
UpdateScene(); //update transformations of all objects that are not static
// update rotation
a += 0.001f * frameDuration;
if (a > 1000 * PI)
{
a -= 1000 * PI; //reset a to prevent stack overflows
}
if (useRenderTarget)
{
// enable render target
target.Bind();
// render scene to render target
sceneGraph.RenderHierarchy(camera);
// render quad
target.Unbind();
quad.Render(postproc, target.GetTextureID());
}
else
{
// render scene directly to the screen
sceneGraph.RenderHierarchy(camera);
}
}
public void Render()
{
// measure frame duration
float frameDuration = (float)timer.Elapsed.TotalSeconds; //timer.ElapsedMilliseconds;
timer.Reset();
timer.Start();
CameraControls(frameDuration);
//prepare matrices for vertex shader
Vector3 campos3 = -cameraM.Row3.Xyz;
camID = GL.GetUniformLocation(shader.programID, "campos");
GL.UseProgram(shader.programID);
GL.Uniform3(camID, campos3);
Vector3 newlightpos3 = lightpos3;
lightID = GL.GetUniformLocation(shader.programID, "lightPos");
GL.UseProgram(shader.programID);
GL.Uniform3(lightID, newlightpos3);
Matrix4 teapotT = Matrix4.CreateFromAxisAngle(new Vector3(0, 1, 0), -a);
teapotN.localM = teapotT;
Matrix4 smallteapotT = Matrix4.CreateFromAxisAngle(new Vector3(0, 1, 0), -b);
smallteapotT *= Matrix4.CreateScale(0.6f);
smallteapotT *= Matrix4.CreateTranslation(8f, 7f, 0);
smallteapot.localM = smallteapotT;
Matrix4 carT = Matrix4.CreateScale(0.8f);
carT *= Matrix4.CreateFromAxisAngle(new Vector3(0, 1, 0), 0.8f * (float)Math.PI);;
carT *= Matrix4.CreateTranslation(4f, -2.2f, 0);
carT *= Matrix4.CreateFromAxisAngle(new Vector3(0, 1, 0), b);
carN.localM = carT;
Matrix4 carT2 = Matrix4.CreateScale(0.8f);
carT2 *= Matrix4.CreateFromAxisAngle(new Vector3(0, -1, 0), 0.2f * (float)Math.PI);;
carT2 *= Matrix4.CreateTranslation(-3.5f, -2.25f, 0);
carT2 *= Matrix4.CreateFromAxisAngle(new Vector3(0, 1, 0), b);
carN2.localM = carT2;
// update rotation
a += 1f * frameDuration;
b += 1.5f * frameDuration;
if (a > 2 * PI)
{
a -= 2 * PI;
}
if (b > 2 * PI)
{
b -= 2 * PI;
}
if (useRenderTarget)
{
// enable render target
target.Bind();
// render scene to render target
root.Render(ToWorld, cameraM);
// render quad
target.Unbind();
quad.Render(postproc, target.GetTextureID());
}
else
{
// render scene directly to the screen
root.Render(ToWorld, cameraM);
}
}