void MotionBlurVelocityBufferApp::dilateVelocity()
{
gl::ScopedFramebuffer fbo( mVelocityDilationBuffer );
gl::ScopedViewport viewport( ivec2( 0, 0 ), mVelocityDilationBuffer->getSize() );
gl::ScopedMatrices matrices;
gl::setMatricesWindowPersp( mVelocityDilationBuffer->getSize() );
{ // downsample velocity into tilemax
gl::ScopedTextureBind tex( mGBuffer->getTexture2d( G_VELOCITY ), 0 );
gl::ScopedGlslProg prog( mTileProg );
gl::drawBuffer( DILATE_TILE_MAX );
mTileProg->uniform( "uVelocityMap", 0 );
mTileProg->uniform( "uTileSize", mTileSize );
gl::drawSolidRect( mVelocityDilationBuffer->getBounds() );
}
{ // build max neighbors from tilemax
gl::ScopedTextureBind tex( mVelocityDilationBuffer->getTexture2d( DILATE_TILE_MAX ), 0 );
gl::ScopedGlslProg prog( mNeighborProg );
gl::drawBuffer( DILATE_NEIGHBOR_MAX );
mNeighborProg->uniform( "uTileMap", 0 );
gl::drawSolidRect( mVelocityDilationBuffer->getBounds() );
}
}
void MotionBlurVelocityBufferApp::drawBlurredContent()
{
gl::ScopedTextureBind colorTex( mGBuffer->getTexture2d( G_COLOR ), 0 );
gl::ScopedTextureBind velTex( mGBuffer->getTexture2d( G_VELOCITY ), 1 );
gl::ScopedTextureBind neigborTex( mVelocityDilationBuffer->getTexture2d( DILATE_NEIGHBOR_MAX ), 2 );
gl::ScopedGlslProg prog( mMotionBlurProg );
gl::ScopedBlendPremult blend;
mMotionBlurProg->uniform( "uColorMap", 0 );
mMotionBlurProg->uniform( "uVelocityMap", 1 );
mMotionBlurProg->uniform( "uNeighborMaxMap", 2 );
mMotionBlurProg->uniform( "uNoiseFactor", mBlurNoise );
mMotionBlurProg->uniform( "uSamples", mSampleCount );
gl::drawSolidRect( getWindowBounds() );
}
void FboMultipleRenderTargetsApp::draw()
{
gl::clear( Color::gray( 0.35f ) );
gl::setMatricesWindow( getWindowSize() );
// draw the two textures we've created side-by-side
auto tex0 = mFbo->getTexture2d( GL_COLOR_ATTACHMENT0 );
auto tex1 = mFbo->getTexture2d( GL_COLOR_ATTACHMENT1 );
gl::draw( tex0, tex0->getBounds() );
gl::draw( tex1, tex1->getBounds() + vec2( tex1->getWidth(), 0 ) );
}
void MotionBlurVelocityBufferApp::drawVelocityBuffers()
{
gl::ScopedGlslProg prog( mVelocityRenderProg );
gl::ScopedModelMatrix matrix;
gl::setDefaultShaderVars();
float width = 200.0f;
float height = width / Rectf( mVelocityDilationBuffer->getBounds() ).getAspectRatio();
Rectf rect( 0.0f, 0.0f, width, height );
gl::ScopedTextureBind velTex( mGBuffer->getTexture2d( G_VELOCITY ), 0 );
gl::translate( getWindowWidth() - width - 10.0f, 10.0f );
gl::drawSolidRect( rect );
gl::ScopedTextureBind tileTex( mVelocityDilationBuffer->getTexture2d( DILATE_TILE_MAX ), 0 );
gl::translate( 0.0f, height + 10.0f );
gl::drawSolidRect( rect );
gl::ScopedTextureBind neigborTex( mVelocityDilationBuffer->getTexture2d( DILATE_NEIGHBOR_MAX ), 0 );
gl::translate( 0.0f, height + 10.0f );
gl::drawSolidRect( rect );
}