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I am doin a collision detection algorithm..

For this I have a point that moves .I got the position of the point. But then here is the problem.

How do i really find where the vector in which the point moves intersect with a line....

If It intersects I need to reflect the vector..

Would be really nice to help me out in this issue..

Also can someone explain to me how the equation of the line AX+BY+C = 0 y=mx+c and the normals related ....

Also how does one fine a line perpendicular to another..

Well too many question and very unordered. Sorry about that . Jus typed all the questions on my mind

Regards