Method draw

samples/_opengl/ShadowMapping/src/ShadowMappingApp.cpp:280–324

}

void ShadowMappingApp::draw()
{
	gl::clear( Color( 0.07f, 0.05f, 0.1f ) );
	
	// Elapsed time called here: the scene must be absolutely identical on both renders!
	float spinAngle = 0.5f * (float) app::getElapsedSeconds();
	
	// Offset to help combat surface acne (self-shadowing)
	gl::enable( GL_POLYGON_OFFSET_FILL );
	glPolygonOffset( mPolygonOffsetFactor, mPolygonOffsetUnits );
	
	// Render scene into shadow map
	gl::setMatrices( mLight.camera );
	gl::viewport( mShadowMap->getSize() );
	{
		gl::ScopedFramebuffer bindFbo( mShadowMap->getFbo() );
		gl::clear();
		drawScene( spinAngle );
	}

	// Render shadowed scene
	gl::setMatrices( mLight.toggleViewpoint ? mLight.camera : mCamera );
	gl::viewport( toPixels( getWindowSize() ) );
	{
		gl::ScopedGlslProg bind( mShadowShader );
		gl::ScopedTextureBind texture( mShadowMap->getTexture() );
		
		mShadowShader->uniform( "uShadowMap", 0 );
		mShadowShader->uniform( "uShadowMatrix", mLight.camera.getProjectionMatrix() * mLight.camera.getViewMatrix() );
		mShadowShader->uniform( "uShadowTechnique", mShadowTechnique );
		mShadowShader->uniform( "uDepthBias", mDepthBias );
		mShadowShader->uniform( "uOnlyShadowmap", mOnlyShadowmap );
		mShadowShader->uniform( "uRandomOffset", mRandomOffset );
		mShadowShader->uniform( "uNumRandomSamples", mNumRandomSamples );
		mShadowShader->uniform( "uEnableNormSlopeOffset", mEnableNormSlopeOffset );
		mShadowShader->uniform( "uLightPos", vec3( gl::getModelView() * vec4( mLight.viewpoint, 1.0 ) ) );
		
		drawScene( spinAngle, mShadowShader );
	}
	
	gl::disable( GL_POLYGON_OFFSET_FILL );
	
	// Render light direction vector
	gl::drawVector( mLight.viewpoint, 4.5f * normalize( mLight.viewpoint ) );
}

void ShadowMappingApp::keyDown( KeyEvent event )
{