2D lines
A line is the shortest straight path that connects two points. A line can be defined by a point on the line and a slope; this is called the slope intercept form. An actual line has no ends; it extends infinitely in both directions. This is not what we intuitively think of as a line. Instead, we want to define a line using a Start Point and an End Point. This is called a Line Segment:
Getting ready
Even though we are implementing a line segment, in code we are going to refer to it as a line. We rarely, if ever, use real lines to detect collisions, but we often use line segments. The Line2D structure we are about to create will consist of two ...
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