const collision line_aabb(const line &a, const aabb &b)
{
collision r;
r.result = false;
for (int i = 0; i < 4; ++i)
{
r.result = r.result || line_line(a, b.edge(i)).result;
}
return r;
}
void draw_aabb(const mat4 &m, const aabb &a, const vec4 &color)
{
for (int i = 0; i < 4; ++i)
draw_line(m, a.edge(i), color);
}