Bullet doesn't always hit a robot

[mrhead]

Well I am not sure how to explain this ;).

Anyway it can happen that bullet will not hit static (not moving) robot even if it should.

For example, let say that bullet speed is 10 pixels per tick. If bullet is on pixel 1 and part of the robot is on pixels 3-8, then on next tick bullet will be on pixel 11 without hitting a robot...

[abinoam]

That's an X-Ray bullet? ;-)

[mrhead]

:D

Now I know where exactly is the problem, but I need to figure out how to fix it.

Imagine this with bullet speed 100 (units per tick)

tick, bullet(x, y, heading), robot(x,y)

tick 0: bullet(0, 0, 90), robot(30, 0)
tick 1: bulltet(100, 0, 90), robot(30, 0)

So after one tick bullet just "jumped" over the robot and there is no collision detected. So fix is to check also traveled trajectory of bullet if there is any collision with bullet.

Sorry if I am not clear enough, but I am doing my best :D