Hey guys, I need to make a music visualizer in quartz composer. The only twist is that I need the bars that are created from the input to show up inside of a predetermined shape or object. For instance, say that I have a circle. When the bars are drawn, the only ones i want to see are the ones that intersect with the shape of the object. Please see the attached photo. Any help would be great. Basically I want to mask the bars.