ok, here's what i want to do:

i have a canon at the bottom of the screen, and i want to do a trace from the canon to where it's tilt is facing, in other words i want a line to be traced from the canon's position and to be oriented to the canon's tilt, like the color dotted line in this picture:



for the moment it doesn't need to bounce off walls, but it does need to trace to the wall, in other words, i need a puzzle bobble style trace from the canon to where the canon is facing, using the canon's tilt angle (using X and Z for 2d alignment)