C++ (Cpp) Vector2::AngleBetweenの例

コード例 #1

ファイル: Vector2.cpp プロジェクト: maxrchung/MagicalGirlStoryBoard

void Vector2::RotateAround(Vector2 origin, double rotation) {
    Vector2 fromMid = *this - origin;
    Vector2 unitVec(1, 0);
    double angleFrom0 = fromMid.AngleBetween(unitVec);
    if (fromMid.y < 0) {
        angleFrom0 *= -1;
    }
    angleFrom0 += rotation;
    Vector2 endMove(cos(angleFrom0), sin(angleFrom0));
    endMove *= fromMid.Magnitude();
    endMove = origin + endMove;

    *this = endMove;
}

コード例 #2

ファイル: Vector2.cpp プロジェクト: maxrchung/OsuukiSB

Vector2 Vector2::RotateAround(Vector2 origin, float rotation) const {
	if (rotation == 0) {
		return *this;
	}

	Vector2 fromMid = *this - origin;
	Vector2 unitVec(1, 0);
	float angleFrom0 = fromMid.AngleBetween(unitVec);
	angleFrom0 -= rotation;
	Vector2 endMove(cos(angleFrom0), sin(angleFrom0));
	endMove *= fromMid.Magnitude();
	endMove = origin + endMove;

	return endMove;
}