The focus for the week was to have a working prototype to test the basic functionality of our game engine. The goal was to have objects in the scene and utilize controls to “shoot” a sphere and collide with the other objects. I was hoping to get the capsule collision working. Unfortunately, I was not able to fully implement capsule to capsule collision. In efforts to get a working prototype, I decided to at least apply capsule to sphere collision. There were issues in cases of capsule colliders that no collision was detected.
Starting from the top, I traced down to see whether the correct collision calculation function was called. Then, I investigated the math calculation for the collision. After spending some time debugging the issue, I was able to uncover a crucial flaw. Since colliders are shared, the unique information that changes the collider comes from the object’s transform matrix. I was performing the calculation on the collider with its position at the origin and never translated them to the object’s position. Thus, it never collided with other colliders. Once that issue was corrected, the sphere to capsule collision was working as intended.