In openFrameworks, is it possible to change the opacity of my fbo sources while using ofxPiMapper?
Figured it out:
Go into addons/ofxPiMapper/src/Surfaces/SurfaceStack.cpp In SurfaceStack::draw(), add ofEnableAlphaBlending() to the if statement inside the for loop right under all the glblend stuff.
void SurfaceStack::draw(){
for(int i = 0; i < _surfaces.size(); ++i){
if(_surfaces[i]->getSource()->getType() == SourceType::SOURCE_TYPE_FBO){
glEnable(GL_BLEND);
glBlendFuncSeparate(GL_ONE, GL_ZERO, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
ofEnableAlphaBlending(); //<-- here
}else{
ofEnableAlphaBlending();
}
_surfaces[i]->draw();
}
}