Circle-line collision

[Marcus]

Very good, thank you. This seems to be very efficient - I was consistently getting over 900 fps on my very old laptop, with minimums still over 600. I will certainly be looking to find a use for this

As long as the speed doesn't get crazy, altering the lines shouldn't be a problem for the collision tests. But don't forget to recalculate the extra data for a line if you do:

Code:

    dx = ln[2] - ln[0]; dy = ln[3] - ln[1]
    ln[6] = sqr(dx*dx + dy*dy)
    ln[4] = dx/ln[6]
    ln[5] = dy/ln[6]