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00001 #ifndef VECTOR2_H 00002 #define VECTOR2_H 00003 00004 #include "ThyrixParameters.h" 00005 00006 00007 #include <assert.h> 00008 00011 class Vector2 { 00012 00013 public: 00014 00016 Vector2 () { x=0.0; y=0.0; } 00017 00019 Vector2 (real x, real y) { this->x=x; this->y=y; } 00020 00022 virtual ~Vector2 () {} 00023 00024 real x; 00025 real y; 00026 00028 void setToZero() { x=0.0; y=0.0; } 00029 00031 void setXY(real x, real y) { this->x=x; this->y=y; } 00032 00034 void setElement(int i, real value) {assert(i>=1 && i<=2); i==1? x=value : y=value; } 00035 00037 real getModule() { 00038 double ax=fabs(x), ay=fabs(y); 00039 if(ax>ay) return ax*sqrt(1.0+sqr(ay/ax)); 00040 else return (ay==0.0 ? 0.0 : ay*sqrt(1.0+sqr(ax/ay))); 00041 } 00042 00044 real getSquaredModule() { return x*x+y*y; } 00045 00047 void normalize() { 00048 real module=getModule(); 00049 assert(module!=0); 00050 x/=module; y/=module; 00051 } 00052 00054 void updateMin(const Vector2& r){ 00055 if(r.x<x) x=r.x; 00056 if(r.y<y) y=r.y; 00057 } 00058 00060 void updateMax(const Vector2& r){ 00061 if(r.x>x) x=r.x; 00062 if(r.y>y) y=r.y; 00063 } 00064 00065 00069 void rotate(real alpha) { 00070 real xOld=x; 00071 real c=cos(alpha); 00072 real s=sin(alpha); 00073 x=x*c-y*s; 00074 y=xOld*s+y*c; 00075 } 00076 00078 void cross(real w){ 00079 real xOld=x; 00080 x=-w*y; 00081 y=w*xOld; 00082 } 00083 00084 00086 real operator[](int i){ 00087 assert(i>=0 && i<=1); 00088 if (i==0) 00089 return x; 00090 else return y; 00091 } 00092 00093 Vector2 operator+(const Vector2 &v) const { 00094 return Vector2(x + v.x, y + v.y); 00095 } 00096 00097 Vector2 operator-(const Vector2 &v) const { 00098 return Vector2(x - v.x, y - v.y); 00099 } 00100 00101 Vector2 operator*(const real r) const { 00102 return Vector2(x * r, y * r); 00103 } 00104 00105 Vector2& operator+=(const Vector2& v) { x+=v.x; y+=v.y; return *this; } 00106 Vector2& operator-=(const Vector2& v) { x-=v.x; y-=v.y; return *this; } 00107 Vector2& operator+=(const real r) { x+=r; y+=r; return *this; } 00108 Vector2& operator-=(const real r) { x-=r; y-=r; return *this; } 00109 Vector2& operator*=(const real r) { x*=r; y*=r; return *this; } 00110 Vector2& operator/=(const real r) { assert(r!=0.0); x/=r; y/=r; return *this; } 00112 real operator*(Vector2 v) { return x*v.x+y*v.y; } 00114 real operator^(Vector2 v) { return x*v.y-y*v.x; } 00115 }; 00116 00117 00118 #endif //VECTOR2_H
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