/*
* @Description: render scene to FBO texture
* @param: none
* @return: none
*/
void Base_ThreeD_ProjectApp::renderSceneToFBO()
{
mScreenSpace1.bindFramebuffer();
glClearColor( 0.5f, 0.5f, 0.5f, 1 );
glClearDepth(1.0f);
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
if (mLightingOn)
glDisable(GL_LIGHTING);
glColor3f( 1.0f, 1.0f, 0.1f );
gl::drawFrustum( mLightRef->getShadowCamera() );
glColor3f( 1.0f, 1.0f, 1.0f );
if (mLightingOn)
glEnable(GL_LIGHTING);
mEye = mCam->getEyePoint();
mEye.normalize();
mEye = mEye * abs(mCameraDistance);
mCam->lookAt( mEye, mCenter, mUp );
gl::setMatrices( *mCam );
mLight->update( *mCam );
drawTestObjects();
mScreenSpace1.unbindFramebuffer();
glDisable(GL_LIGHTING);
}
void ShadowMapSample::draw()
{
gl::clear();
gl::enableDepthWrite();
glEnable( GL_LIGHTING );
updateShadowMap();
gl::enableDepthRead();
glEnable( GL_TEXTURE_2D );
mDepthFbo.bindDepthTexture();
mShader.bind();
mShader.uniform( "shadowTransMatrix", mLight->getShadowTransformationMatrix( *mCamera ) );
if( mLookThroughCamera )
gl::setMatrices( *mCamera );
else
gl::setMatrices( mLight->getShadowCamera() );
mLight->update( *mCamera );
glPushMatrix();
mBackboard.draw();
mTorus.draw();
gl::drawCube( vec3::zero(), vec3( 1, 1, 1 ) );
glPopMatrix();
mShader.unbind();
mDepthFbo.unbindTexture();
// Draw the lighting frustum unless we're looking through it
if( mLookThroughCamera ) {
glDisable( GL_LIGHTING );
glColor3f( 1.0f, 1.0f, 0.1f );
gl::drawFrustum( mLight->getShadowCamera() );
}
if( mDrawDepthMap ) { // there are faster ways to achieve this, but this is a handy way to see the depth map
gl::setMatricesWindow( getWindowSize() );
Surface32f shadowMapSurface( mDepthFbo.getDepthTexture() );
ip::hdrNormalize( &shadowMapSurface );
gl::color( Color::white() );
gl::draw( gl::Texture( shadowMapSurface ), Rectf( 0, 0, 128, 128 ) );
}
}
