I am creating a 2D side-scroller for my first game and I have quite a bit done; however, one thing has been giving me trouble for around a week now. I want to shoot where the user taps, so I figure I need to raycast to the point where the user taps and shoot a projectile there and then destroy it when it collides with an object? I have searched and cant find anything related to this, I found examples for raycasting from the camera to a touch but not from the actual character. Any ideas?
Well, in this case you need two things (or possibly 3).
First, you need to know what plane your character is moving on. Usually this would be as simple as creating one with:
Then, to get the touch position, you can use
Then, finally, get the actual ray by using
Now, you can use this ray however you like- for shooting a projectile, for calculating a hitscan, anything.
answered Feb 29 '12 at 12:16 AM