an SDL_FRect structure representing the rectangle to intersect.
a pointer to the starting X-coordinate of the line.
a pointer to the starting Y-coordinate of the line.
a pointer to the ending X-coordinate of the line.
a pointer to the ending Y-coordinate of the line.
true if there is an intersection, false otherwise.
Calculate the intersection of a rectangle and line segment with float precision.
This function is used to clip a line segment to a rectangle. A line segment contained entirely within the rectangle or that does not intersect will remain unchanged. A line segment that crosses the rectangle at either or both ends will be clipped to the boundary of the rectangle and the new coordinates saved in X1, Y1, X2, and/or Y2 as necessary.