Rudy's Blog

The 2600 GPU (the TIA) has a group of registers which indicate whether two elements had overlapping active (colored) pixels since the previous time the registers were cleared. This is super accurate compared to a simple x/y comparison (termed bounding box detection), but it will have problems if the elements can overlap without having overlapping active pixels and in cases where elements are reused before the registers are tested & cleared.

The 2600 GPU (the TIA) has a group of registers which indicate whether two elements had overlapping active (colored) pixels since the previous time the registers were cleared. This is super accurate compared to a simple x/y comparison (termed bounding box detection), but it will have problems if the elements can overlap without having overlapping active pixels and in cases where elements are reused before the registers are tested & cleared.

Thanks for the information in my experiment I was unable to consistently create sprite collision on Stella so I was wondering if there was a better way to do it. I think I'm going to back to commenting code for now. I have 30 source code files so that may be more productive than trying to write in a language I simply do not know and without using techniques to accomplish things I also do not know.