FBO in computer graphics stands for frame buffer object. This is an offscreen raster buffer where openFrameworks can draw just like on the screen. You can draw something in this buffer, and then draw the buffer contents on the screen. The picture in the buffer is not cleared with each
testApp::draw() calling, so you can use FBO for accumulated drawings.
In openFrameworks, FBO is represented by the class
The typical scheme of its usage is the following:
fbo, in the
fbowith some size in the
int w = ofGetWidth(); int h = ofGetHeight(); fbo.allocate( w, h );
fbo. You can do it not only in