Just move the end points. This is a remix of rubiks_cube_guy238's excelent line intersection project http://scratch.mit.edu/projects/rubiks_cube_guy238/1271660 It's now interactive and notifies that the lines are parallel instead of dividing by zero. Original notes: "Draw 2 lines and the sprite will move to where the lines intersect. If the lines don't cross, it will go to where they will intersect if they were rays. I got the formula from Wikipedia." http://en.wikipedia.org/wiki/Line-line_intersection
