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cdm_math.hpp ligne 6809
template
constexpr void collides(line_T<T, line_representation::Points> l1,
line_T<T, line_representation::Points> l2,
vector2_T& intersection)
{
const T x1 = l1.p1.x;
const T x2 = l1.p2.x;
const T x3 = l2.p1.x;
const T x4 = l2.p2.x;
const T y1 = l1.p1.y;
const T y2 = l1.p2.y;
const T y3 = l2.p1.y;
const T y4 = l2.p2.y;

return {
	((x1 * y1 - y1 * x2) * (x3 - x4) - (x1 - x2) * (x3 * x4 - y3 * x4)) /
		((x1 - x2) * (y3 - y4) - (y1 - y2) * (x3 - x4)),
		((x1 * y1 - y1 * x2) * (y3 - y4) - (y1 - y2) * (x3 * x4 - y3 * x4)) /
		((x1 - x2) * (y3 - y4) - (y1 - y2) * (x3 - x4)) };

}