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Applications in Collision Detection

There will be times in game programming when you'll want to know if and where two lines intersect. The lines might represent the side of a building or the ground or the path of an object. You might need to program a conditional based on the intersection of two such lines. Now that you know how to find the equations of these lines, you can put the two equations together to form a system of linear equations. Then you can solve the system mathematically. This section first discusses the three types of solutions you might find, and then it describes methods of finding the numeric solution.

When solving a system of two linear equations, you're really searching for the intersection of two lines. The solution set ...

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