fix: trace aperture height always > 0. The fact that it could be 0 messed up the source tutorial (that is based on a random image example so sometimes the trace source has a height of 0). I could have seed the example image but this is a more general and durable fix.
Description
fix: trace aperture height always > 0. The fact that it could be 0 messed up the source tutorial (that is based on a random image example so sometimes the trace source has a height of 0). I could have seed the example image but this is a more general and durable fix.