ofxAddons
Simple addon for using stencil buffer.
Forks
Forks pushed to more recently than naychrist/ofxStencil itself, plus any admin-confirmed fork with commits of its own — worth checking if you're hitting issues with the original.
README
ofxStencil
Simple addon for using stencil buffer. Code adapted from: http://www.videotutorialsrock.com/opengl_tutorial/reflections/video.php
You need to enable stencil buffer in main.cpp, for example:
ofAppGlutWindow window; window.setGlutDisplayString("stencil~2 rgba double samples>=4 depth");
Usage:
ofxStencil stencil; stencil.beginDrawingStencil(); //draw your mask stencil.beginUsingStencil(); //draw what you want masked stencil.endUsingStencil();