I was wondering for a way to create more dynamic animations with OF. Most of the time I use transparent PNGs for animations but now I really want to take a step forward.
I am looking for a way to create deforming circles, which I want to use to create an underwater bubble effect. My instincts say that I should use ofMesh to draw circles/spherical shapes and map proper textures on them. I would be really thankful if anyone can provide few pointers on this.
There is a very nice HTML5 example of something similar: http://hascanvas.com/blobby
It wouldn’t be too much porting it to c++ (the code becomes visible if you hover the white arrows on the left of the screen)
I’ve used this and modified it to add more blobs and have them interact with each other (which I guess wouldn’t be possible to do with a vertex shader)
here’s my example http://pcuret.com/the-eurozone-bubble/
You could probably get a nice bubble effect if they were transparent and floating upwards
Though you can’t access other vertices in a vertex shader, you can model the results of an interaction using a shader by using attributes in your shader which allow you to set different values per vertex. It does require that you do collision and deformation at least in part on the CPU, but it means that you can keep all your display logic in the GPU.