geometry - Two lines segment intersection step by step -


i studying algorithm , math , came "intersection of 2 line segment". searched code , explanation no luck didn't understand how works step step. read page , @gareth explained here's link . confused. have example 1 p=(11,11), r=(-12,-12), q=(0,0), s=(0,10). question how apply @gareth's expanation. :-(, not in math need help.

any highly appreciated. thank guys. hope there me understand this.


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