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00001 /******************************************************************************** 00002 * * 00003 * S i n g l e - P r e c i s i o n 2 - E l e m e n t V e c t o r * 00004 * * 00005 ********************************************************************************* 00006 * Copyright (C) 1994,2009 by Jeroen van der Zijp. All Rights Reserved. * 00007 ********************************************************************************* 00008 * This library is free software; you can redistribute it and/or modify * 00009 * it under the terms of the GNU Lesser General Public License as published by * 00010 * the Free Software Foundation; either version 3 of the License, or * 00011 * (at your option) any later version. * 00012 * * 00013 * This library is distributed in the hope that it will be useful, * 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * 00016 * GNU Lesser General Public License for more details. * 00017 * * 00018 * You should have received a copy of the GNU Lesser General Public License * 00019 * along with this program. If not, see <http://www.gnu.org/licenses/> * 00020 ********************************************************************************* 00021 * $Id: FXVec2f.h,v 1.27 2009/01/26 09:40:23 fox Exp $ * 00022 ********************************************************************************/ 00023 #ifndef FXVEC2F_H 00024 #define FXVEC2F_H 00025 00026 00027 namespace FX { 00028 00029 00030 class FXMat3f; 00031 00032 00033 /// Single-precision 2-element vector 00034 class FXAPI FXVec2f { 00035 public: 00036 FXfloat x; 00037 FXfloat y; 00038 public: 00039 00040 /// Default constructor; value is not initialized 00041 FXVec2f(){} 00042 00043 /// Initialize from another vector 00044 FXVec2f(const FXVec2f& v){x=v.x;y=v.y;} 00045 00046 /// Initialize from array of floats 00047 FXVec2f(const FXfloat v[]){x=v[0];y=v[1];} 00048 00049 /// Initialize from components 00050 FXVec2f(FXfloat xx,FXfloat yy){x=xx;y=yy;} 00051 00052 /// Return a non-const reference to the ith element 00053 FXfloat& operator[](FXint i){return (&x)[i];} 00054 00055 /// Return a const reference to the ith element 00056 const FXfloat& operator[](FXint i) const {return (&x)[i];} 00057 00058 /// Assignment 00059 FXVec2f& operator=(const FXVec2f& v){x=v.x;y=v.y;return *this;} 00060 00061 /// Assignment from array of floats 00062 FXVec2f& operator=(const FXfloat v[]){x=v[0];y=v[1];return *this;} 00063 00064 /// Set value from another vector 00065 FXVec2f& set(const FXVec2f& v){x=v.x;y=v.y;return *this;} 00066 00067 /// Set value from array of floats 00068 FXVec2f& set(const FXfloat v[]){x=v[0];y=v[1];return *this;} 00069 00070 /// Set value from components 00071 FXVec2f& set(FXfloat xx,FXfloat yy){x=xx;y=yy;return *this;} 00072 00073 /// Assigning operators 00074 FXVec2f& operator*=(FXfloat n){x*=n;y*=n;return *this;} 00075 FXVec2f& operator/=(FXfloat n){x/=n;y/=n;return *this;} 00076 FXVec2f& operator+=(const FXVec2f& v){x+=v.x;y+=v.y;return *this;} 00077 FXVec2f& operator-=(const FXVec2f& v){x-=v.x;y-=v.y;return *this;} 00078 00079 /// Conversions 00080 operator FXfloat*(){return &x;} 00081 operator const FXfloat*() const {return &x;} 00082 00083 /// Unary 00084 FXVec2f operator+() const { return *this; } 00085 FXVec2f operator-() const { return FXVec2f(-x,-y); } 00086 00087 /// Vector and vector 00088 FXVec2f operator+(const FXVec2f& v) const { return FXVec2f(x+v.x,y+v.y); } 00089 FXVec2f operator-(const FXVec2f& v) const { return FXVec2f(x-v.x,y-v.y); } 00090 00091 /// Vector and matrix 00092 FXVec2f operator*(const FXMat3f& m) const; 00093 00094 /// Scaling 00095 friend inline FXVec2f operator*(const FXVec2f& a,FXfloat n); 00096 friend inline FXVec2f operator*(FXfloat n,const FXVec2f& a); 00097 friend inline FXVec2f operator/(const FXVec2f& a,FXfloat n); 00098 friend inline FXVec2f operator/(FXfloat n,const FXVec2f& a); 00099 00100 /// Dot product 00101 FXfloat operator*(const FXVec2f& v) const { return x*v.x+y*v.y; } 00102 00103 /// Test if zero 00104 FXbool operator!() const { return x==0.0f && y==0.0f; } 00105 00106 /// Equality tests 00107 FXbool operator==(const FXVec2f& v) const { return x==v.x && y==v.y; } 00108 FXbool operator!=(const FXVec2f& v) const { return x!=v.x || y!=v.y; } 00109 00110 friend inline FXbool operator==(const FXVec2f& a,FXfloat n); 00111 friend inline FXbool operator!=(const FXVec2f& a,FXfloat n); 00112 friend inline FXbool operator==(FXfloat n,const FXVec2f& a); 00113 friend inline FXbool operator!=(FXfloat n,const FXVec2f& a); 00114 00115 /// Inequality tests 00116 FXbool operator<(const FXVec2f& v) const { return x<v.x && y<v.y; } 00117 FXbool operator<=(const FXVec2f& v) const { return x<=v.x && y<=v.y; } 00118 FXbool operator>(const FXVec2f& v) const { return x>v.x && y>v.y; } 00119 FXbool operator>=(const FXVec2f& v) const { return x>=v.x && y>=v.y; } 00120 00121 friend inline FXbool operator<(const FXVec2f& a,FXfloat n); 00122 friend inline FXbool operator<=(const FXVec2f& a,FXfloat n); 00123 friend inline FXbool operator>(const FXVec2f& a,FXfloat n); 00124 friend inline FXbool operator>=(const FXVec2f& a,FXfloat n); 00125 00126 friend inline FXbool operator<(FXfloat n,const FXVec2f& a); 00127 friend inline FXbool operator<=(FXfloat n,const FXVec2f& a); 00128 friend inline FXbool operator>(FXfloat n,const FXVec2f& a); 00129 friend inline FXbool operator>=(FXfloat n,const FXVec2f& a); 00130 00131 /// Length and square of length 00132 FXfloat length2() const { return x*x+y*y; } 00133 FXfloat length() const { return sqrtf(length2()); } 00134 00135 /// Clamp values of vector between limits 00136 FXVec2f& clamp(FXfloat lo,FXfloat hi){x=FXCLAMP(lo,x,hi);y=FXCLAMP(lo,y,hi);return *this;} 00137 00138 /// Lowest or highest components 00139 friend inline FXVec2f lo(const FXVec2f& a,const FXVec2f& b); 00140 friend inline FXVec2f hi(const FXVec2f& a,const FXVec2f& b); 00141 00142 /// Normalize vector 00143 friend FXAPI FXVec2f normalize(const FXVec2f& v); 00144 00145 /// Save vector to a stream 00146 friend FXAPI FXStream& operator<<(FXStream& store,const FXVec2f& v); 00147 00148 /// Load vector from a stream 00149 friend FXAPI FXStream& operator>>(FXStream& store,FXVec2f& v); 00150 }; 00151 00152 00153 inline FXVec2f operator*(const FXVec2f& a,FXfloat n){return FXVec2f(a.x*n,a.y*n);} 00154 inline FXVec2f operator*(FXfloat n,const FXVec2f& a){return FXVec2f(n*a.x,n*a.y);} 00155 inline FXVec2f operator/(const FXVec2f& a,FXfloat n){return FXVec2f(a.x/n,a.y/n);} 00156 inline FXVec2f operator/(FXfloat n,const FXVec2f& a){return FXVec2f(n/a.x,n/a.y);} 00157 00158 inline FXbool operator==(const FXVec2f& a,FXfloat n){return a.x==n && a.y==n;} 00159 inline FXbool operator!=(const FXVec2f& a,FXfloat n){return a.x!=n || a.y!=n;} 00160 inline FXbool operator==(FXfloat n,const FXVec2f& a){return n==a.x && n==a.y;} 00161 inline FXbool operator!=(FXfloat n,const FXVec2f& a){return n!=a.x || n!=a.y;} 00162 00163 inline FXbool operator<(const FXVec2f& a,FXfloat n){return a.x<n && a.y<n;} 00164 inline FXbool operator<=(const FXVec2f& a,FXfloat n){return a.x<=n && a.y<=n;} 00165 inline FXbool operator>(const FXVec2f& a,FXfloat n){return a.x>n && a.y>n;} 00166 inline FXbool operator>=(const FXVec2f& a,FXfloat n){return a.x>=n && a.y>=n;} 00167 00168 inline FXbool operator<(FXfloat n,const FXVec2f& a){return n<a.x && n<a.y;} 00169 inline FXbool operator<=(FXfloat n,const FXVec2f& a){return n<=a.x && n<=a.y;} 00170 inline FXbool operator>(FXfloat n,const FXVec2f& a){return n>a.x && n>a.y;} 00171 inline FXbool operator>=(FXfloat n,const FXVec2f& a){return n>=a.x && n>=a.y;} 00172 00173 inline FXVec2f lo(const FXVec2f& a,const FXVec2f& b){return FXVec2f(FXMIN(a.x,b.x),FXMIN(a.y,b.y));} 00174 inline FXVec2f hi(const FXVec2f& a,const FXVec2f& b){return FXVec2f(FXMAX(a.x,b.x),FXMAX(a.y,b.y));} 00175 00176 extern FXAPI FXVec2f normalize(const FXVec2f& v); 00177 00178 extern FXAPI FXStream& operator<<(FXStream& store,const FXVec2f& v); 00179 extern FXAPI FXStream& operator>>(FXStream& store,FXVec2f& v); 00180 00181 } 00182 00183 #endif
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