constexpr float PI_1p5 = PI * 1.5f;
constexpr float PI_2p0 = PI * 2.0f;
+constexpr float DEG_RAD_FACTOR = PI / 180.0f;
+constexpr float RAD_DEG_FACTOR = 180.0f / PI;
+
+constexpr float deg2rad(float d) {
+ return d * DEG_RAD_FACTOR;
+}
+
+constexpr float rad2deg(float r) {
+ return r * RAD_DEG_FACTOR;
+}
+
+
+template<class T>
+T manhattan_distance(const glm::tvec3<T> &a, const glm::tvec3<T> &b) {
+ glm::tvec3<T> diff(abs(a - b));
+ return diff.x + diff.y + diff.z;
+}
+
+template<class T>
+T manhattan_radius(const glm::tvec3<T> &v) {
+ glm::tvec3<T> a(abs(v));
+ return std::max(a.x, std::max(a.y, a.z));
+}
+
+
struct AABB {
glm::vec3 min;
glm::vec3 max;