diff options
Diffstat (limited to 'src/math')
| -rw-r--r-- | src/math/Vector2D.h | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/src/math/Vector2D.h b/src/math/Vector2D.h index 76664522..a090155c 100644 --- a/src/math/Vector2D.h +++ b/src/math/Vector2D.h @@ -18,7 +18,7 @@ public: x *= invsqrt; y *= invsqrt; }else - x = 0.0f; + x = 1.0f; } const CVector2D &operator+=(CVector2D const &right) { x += right.x; @@ -52,6 +52,9 @@ public: CVector2D operator*(float t) const { return CVector2D(x*t, y*t); } + CVector2D operator/(float t) const { + return CVector2D(x/t, y/t); + } }; inline float @@ -65,3 +68,26 @@ CrossProduct2D(const CVector2D &v1, const CVector2D &v2) { return v1.x*v2.y - v1.y*v2.x; } + +inline float +Distance2D(const CVector2D &v, float x, float y) +{ + return Sqrt((v.x-x)*(v.x-x) + (v.y-y)*(v.y-y)); +} + +inline float +DistanceSqr2D(const CVector2D &v, float x, float y) +{ + return (v.x-x)*(v.x-x) + (v.y-y)*(v.y-y); +} + +inline void +NormalizeXY(float &x, float &y) +{ + float l = Sqrt(x*x + y*y); + if(l != 0.0f){ + x /= l; + y /= l; + }else + x = 1.0f; +} |