void rayMarcherApp::draw()
{
glClearColor( 0, 0, 0, 0 );
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glEnable( GL_DEPTH_TEST );
glEnable( GL_LIGHTING );
glDepthMask( GL_TRUE );
glDisable( GL_TEXTURE_2D );
gl::setMatrices( mMayaCam.getCamera() );
mMarcher.renderSceneGL();
gl::setMatricesWindow( getWindowSize() );
// draw as much of the texture as we've rendered
glDisable( GL_LIGHTING );
glDepthMask( GL_TRUE );
glDisable( GL_DEPTH_TEST );
glColor3f( 1, 1, 1 );
mImageTexture.enableAndBind();
glBegin( GL_QUADS );
glTexCoord2f( mImageTexture.getLeft(), mImageTexture.getTop() );
glVertex2f( 0, 0 );
glTexCoord2f( mImageTexture.getLeft(), mImageTexture.getBottom() * mCurrentLine / mImageTexture.getHeight() );
glVertex2f( 0, mCurrentLine );
glTexCoord2f( mImageTexture.getRight(), mImageTexture.getBottom() * mCurrentLine / mImageTexture.getHeight() );
glVertex2f( mImageTexture.getWidth(), mCurrentLine );
glTexCoord2f( mImageTexture.getRight(), mImageTexture.getTop() );
glVertex2f( mImageTexture.getWidth(), 0 );
glEnd();
}
