hgevector.h
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上传日期:2022-02-12
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文件大小:2k
- /*
- ** Haaf's Game Engine 1.7
- ** Copyright (C) 2003-2007, Relish Games
- ** hge.relishgames.com
- **
- ** hgeVector helper class
- */
- #ifndef HGEVECTOR_H
- #define HGEVECTOR_H
- #include "hge.h"
- #include <math.h>
- /*
- ** Fast 1.0/sqrtf(float) routine
- */
- float InvSqrt(float x);
- class hgeVector
- {
- public:
- float x,y;
- hgeVector(float _x, float _y) { x=_x; y=_y; }
- hgeVector() { x=0; y=0; }
- hgeVector operator- () const { return hgeVector(-x, -y); }
- hgeVector operator- (const hgeVector &v) const { return hgeVector(x-v.x, y-v.y); }
- hgeVector operator+ (const hgeVector &v) const { return hgeVector(x+v.x, y+v.y); }
- hgeVector& operator-= (const hgeVector &v) { x-=v.x; y-=v.y; return *this; }
- hgeVector& operator+= (const hgeVector &v) { x+=v.x; y+=v.y; return *this; }
- bool operator== (const hgeVector &v) const { return (x==v.x && y==v.y); }
- bool operator!= (const hgeVector &v) const { return (x!=v.x || y!=v.y); }
- hgeVector operator/ (const float scalar) const { return hgeVector(x/scalar, y/scalar); }
- hgeVector operator* (const float scalar) const { return hgeVector(x*scalar, y*scalar); }
- hgeVector& operator*= (const float scalar) { x*=scalar; y*=scalar; return *this; }
- float Dot(const hgeVector *v) const { return x*v->x + y*v->y; }
- float Length() const { return sqrtf(Dot(this)); }
- float Angle(const hgeVector *v = 0) const;
-
- void Clamp(const float max) { if(Length() > max) { Normalize(); x *= max; y *= max; } }
- hgeVector* Normalize() { float rc=InvSqrt(Dot(this)); x*=rc; y*=rc; return this; }
- hgeVector* Rotate(float a);
- };
- inline hgeVector operator* (const float s, const hgeVector &v) { return v*s; }
- inline float operator^ (const hgeVector &v, const hgeVector &u) { return v.Angle(&u); }
- inline float operator% (const hgeVector &v, const hgeVector &u) { return v.Dot(&u); }
- #endif