This is part five in a series on OpenCL Fuse development for Blackmagic Fusion. I am attempting to convert the lessons from the Book of Shaders into working Fuses, learning a bit about programming and parallel processing as I go.
As I said at the end of the previous article, I’m skipping BoS Chapter 6 on Color because this series is aimed at compositors, who hopefully already understand that topic fairly well. If you’re an engineering type, though, definitely take a look at that chapter and work through the exercises; they’ll do you good! I am now moving on to drawing shapes.
As usual, I’m looking ahead toward where I think I’ll want to expand on what I learn, so I’ll begin by adding some more controls to the Fuse, even before I start looking at the OCL code. Obviously, I’ll need to add another button for this mode. For now, I’ll call it “Rectangle,” although I might change it to “Shapes” later on and add another sub-mode multi-button like I did for the Interpolation mode. I also want some in-Viewer controls for transforming the shape, shells for which are not available in my template. To the right you can see a version of the control panel that’s even a little further advanced than this article describes, with controls for Soft Edge, solid or hollow shapes, and a mode that creates a regular polygon. Continue reading →
