void BayBridgeApp::drawFbo()
{
mFboRaw->bindFramebuffer();
gl::clear(Color::black());
gl::setMatrices(mCamera);
drawBridge(vec3(0), 0.0f);
mBridge.Draw();
mFboRaw->unbindFramebuffer();
////////////////////////////////////////////////////
mFboHiPass->bindFramebuffer();
mFboRaw->bindTexture(0);
mShaderHiPass->bind();
gl::enableAlphaBlending();
gl::clear(ColorA::zero());
gl::setMatricesWindow(getWindowSize());
gl::drawSolidRect(Rectf({vec2(0), getWindowSize()}));
gl::disableAlphaBlending();
mFboRaw->unbindTexture(0);
mFboHiPass->unbindFramebuffer();
////////////////////////////////////////////////////
mFboBlurU->bindFramebuffer();
mFboHiPass->bindTexture(0);
mShaderBlur->bind();
mShaderBlur->uniform("uBlurAxis", vec2(1.0, 0.0));
mShaderBlur->uniform("uBlurStrength", 2.0f);
mShaderBlur->uniform("uBlurSize", 1.0f);
gl::clear(ColorA::zero());
gl::setMatricesWindow(getWindowSize());
gl::drawSolidRect(Rectf({ vec2(0), getWindowSize() }));
mFboHiPass->unbindTexture(0);
mFboBlurU->unbindFramebuffer();
////////////////////////////////////////////////////
mFboBlurV->bindFramebuffer();
mFboBlurU->bindTexture(0);
mShaderBlur->bind();
mShaderBlur->uniform("uBlurAxis", vec2(0.0, 1.0));
mShaderBlur->uniform("uBlurStrength", 2.0f);
mShaderBlur->uniform("uBlurSize", 2.0f);
gl::clear(ColorA::zero());
gl::setMatricesWindow(getWindowSize());
gl::drawSolidRect(Rectf({ vec2(0), getWindowSize() }));
mFboBlurU->unbindTexture(0);
mFboBlurV->unbindFramebuffer();
}
void MotionBlurFboApp::draw()
{
gl::viewport( vec2(), mAccumFbo->getSize() );
if( ! mPaused ) {
// make 'mAccumFbo' the active framebuffer
gl::ScopedFramebuffer fbScp( mAccumFbo );
// clear out both of our FBOs
gl::clear( Color::black() );
gl::color( 1, 1, 1, 1 );
// iterate all the sub-frames
double startTime = getElapsedSeconds();
for( int i = 0; i < SUBFRAMES; ++i ) {
// draw the Cube's sub-frame into mFbo
gl::enableDepth();
gl::enableAlphaBlending();
mFbo->bindFramebuffer();
gl::clear();
gl::enableDepth();
gl::setMatrices( mCam );
updateCubeRotation( startTime + i / (float)SUBFRAMES );
gl::multModelMatrix( mCubeRotation );
mBatch->draw();
// now add this frame to the accumulation FBO
mAccumFbo->bindFramebuffer();
gl::setMatricesWindow( mAccumFbo->getSize() );
gl::enableAdditiveBlending();
gl::enableDepth( false );
gl::draw( mFbo->getColorTexture() );
}
}
gl::disableDepthRead();
gl::disableAlphaBlending();
// set the color to be 1/SUBFRAMES, which divides the HDR image by the number of sub-frames we rendered
gl::color( 1.0f / SUBFRAMES, 1.0f / SUBFRAMES, 1.0f / SUBFRAMES, 1 );
gl::setMatricesWindow( getWindowSize() );
gl::draw( mAccumFbo->getColorTexture() );
}