The physics driven method mentioned in the previous blog post has now been implemented, and the game feels a lot better for it. And, even more importantly, collision between swords now works:
Fixing Collision
After searching online, it turns out, Unity does not support collisions between two kinematic Rigidbodies. Unity does however, support trigger events between two kinematic Rigidbodies.
I set the box collider on the sword to a trigger, place a basic print command to be played when an overlap occurs and it immediately works. Problem is, triggers don’t have collisions so there was only one solution:
I fake collisions.
Since the sword is now driven by physics forces, I can apply an impulse force in the opposite direction of the sword’s travel whenever it overlapped with another sword. After implementing it, it’s not perfect, and a bit bouncy but it works. So players can now block incoming attacks.
With that finally working, the core gameplay is done. Leaving me to get to the fun stuff: tweaks and polish.
Polish – Making Clashes Clash
I want to give as much feedback to the player wherever possible. In this case, I wanted a visual cue for players so they know when they have been blocked. I created a simple particle system that is just a big flash, this is attached to the sword and set up so whenever there’s a collision between the two swords the particle will play.
The results are noticeable:
Robert J Harper 