Method renderSceneToFbo

samples/_opengl/FboBasic/src/FboBasicApp.cpp:38–64

Render the color cube into the FBO

// Render the color cube into the FBO
void FboBasicApp::renderSceneToFbo()
{
	// this will restore the old framebuffer binding when we leave this function
	// on non-OpenGL ES platforms, you can just call mFbo->unbindFramebuffer() at the end of the function
	// but this will restore the "screen" FBO on OpenGL ES, and does the right thing on both platforms
	gl::ScopedFramebuffer fbScp( mFbo );
	// clear out the FBO with blue
	gl::clear( Color( 0.25, 0.5f, 1.0f ) );

	// setup the viewport to match the dimensions of the FBO
	gl::ScopedViewport scpVp( ivec2( 0 ), mFbo->getSize() );

	// setup our camera to render the torus scene
	CameraPersp cam( mFbo->getWidth(), mFbo->getHeight(), 60.0f );
	cam.setPerspective( 60, mFbo->getAspectRatio(), 1, 1000 );
	cam.lookAt( vec3( 2.8f, 1.8f, -2.8f ), vec3( 0 ));
	gl::setMatrices( cam );

	// set the modelview matrix to reflect our current rotation
	gl::setModelMatrix( mRotation );
	
	// render the color cube
	gl::ScopedGlslProg shaderScp( gl::getStockShader( gl::ShaderDef().color() ) );
	gl::color( Color( 1.0f, 0.5f, 0.25f ) );
	gl::drawColorCube( vec3( 0 ), vec3( 2.2f ) );
	gl::color( Color::white() );
}

void FboBasicApp::update()
{