SpaceExpansion/Maths/b2Angle.cpp

//
// Created by jovian on 31/07/17.
//

#include "b2Angle.h"


float b2Angle(b2Vec2 u, b2Vec2 v) {
    u.Normalize();
    v.Normalize();
    float rep(std::acos(b2Dot(u, v)));
    if ( b2Cross(u, v) > 0.0f )
        rep *= -1.0f;

    return rep;
}

float b2Angle(b2Vec2 u) {
    return b2Angle(u, b2Vec2(1.0f, 0.0f));
}