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00001 /******************************************************************************** 00002 * * 00003 * S i n g l e - P r e c i s i o n 4 - 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: FXVec4f.h,v 1.39 2009/02/04 18:11:55 fox Exp $ * 00022 ********************************************************************************/ 00023 #ifndef FXVEC4F_H 00024 #define FXVEC4F_H 00025 00026 00027 namespace FX { 00028 00029 00030 class FXMat4f; 00031 00032 00033 /// Single-precision 4-element vector 00034 class FXAPI FXVec4f { 00035 public: 00036 FXfloat x; 00037 FXfloat y; 00038 FXfloat z; 00039 FXfloat w; 00040 public: 00041 00042 /// Default constructor; value is not initialized 00043 FXVec4f(){} 00044 00045 /// Initialize from another vector 00046 FXVec4f(const FXVec4f& v){x=v.x;y=v.y;z=v.z;w=v.w;} 00047 00048 /// Construct with 3-vector and optional scalar 00049 FXVec4f(const FXVec3f& v,FXfloat ww=1.0f){x=v.x;y=v.y;z=v.z;w=ww;} 00050 00051 /// Construct from array of floats 00052 FXVec4f(const FXfloat v[]){x=v[0];y=v[1];z=v[2];w=v[3];} 00053 00054 /// Construct from components 00055 FXVec4f(FXfloat xx,FXfloat yy,FXfloat zz,FXfloat ww=1.0f){x=xx;y=yy;z=zz;w=ww;} 00056 00057 /// Return a non-const reference to the ith element 00058 FXfloat& operator[](FXint i){return (&x)[i];} 00059 00060 /// Return a const reference to the ith element 00061 const FXfloat& operator[](FXint i) const {return (&x)[i];} 00062 00063 /// Assignment 00064 FXVec4f& operator=(const FXVec3f& v){x=v.x;y=v.y;z=v.z;w=1.0f;return *this;} 00065 FXVec4f& operator=(const FXVec4f& v){x=v.x;y=v.y;z=v.z;w=v.w;return *this;} 00066 00067 /// Assignment from array of floats 00068 FXVec4f& operator=(const FXfloat v[]){x=v[0];y=v[1];z=v[2];w=v[3];return *this;} 00069 00070 /// Set value from another vector 00071 FXVec4f& set(const FXVec4f& v){x=v.x;y=v.y;z=v.z;w=v.w;return *this;} 00072 00073 /// Set value from array of floats 00074 FXVec4f& set(const FXfloat v[]){x=v[0];y=v[1];z=v[2];w=v[3];return *this;} 00075 00076 /// Set value from components 00077 FXVec4f& set(FXfloat xx,FXfloat yy,FXfloat zz,FXfloat ww){x=xx;y=yy;z=zz;w=ww;return *this;} 00078 00079 /// Assigning operators 00080 FXVec4f& operator*=(FXfloat n){x*=n;y*=n;z*=n;w*=n;return *this;} 00081 FXVec4f& operator/=(FXfloat n){x/=n;y/=n;z/=n;w/=n;return *this;} 00082 FXVec4f& operator+=(const FXVec4f& v){x+=v.x;y+=v.y;z+=v.z;w+=v.w;return *this;} 00083 FXVec4f& operator-=(const FXVec4f& v){x-=v.x;y-=v.y;z-=v.z;w-=v.w;return *this;} 00084 00085 /// Conversion 00086 operator FXfloat*(){return &x;} 00087 operator const FXfloat*() const {return &x;} 00088 operator FXVec3f&(){return *reinterpret_cast<FXVec3f*>(this);} 00089 operator const FXVec3f&() const {return *reinterpret_cast<const FXVec3f*>(this);} 00090 00091 /// Unary 00092 FXVec4f operator+() const { return *this; } 00093 FXVec4f operator-() const { return FXVec4f(-x,-y,-z,-w); } 00094 00095 /// Vector and vector 00096 FXVec4f operator+(const FXVec4f& v) const { return FXVec4f(x+v.x,y+v.y,z+v.z,w+v.w); } 00097 FXVec4f operator-(const FXVec4f& v) const { return FXVec4f(x-v.x,y-v.y,z-v.z,w-v.w); } 00098 00099 /// Vector and matrix 00100 FXVec4f operator*(const FXMat4f& m) const; 00101 00102 /// Scaling 00103 friend inline FXVec4f operator*(const FXVec4f& a,FXfloat n); 00104 friend inline FXVec4f operator*(FXfloat n,const FXVec4f& a); 00105 friend inline FXVec4f operator/(const FXVec4f& a,FXfloat n); 00106 friend inline FXVec4f operator/(FXfloat n,const FXVec4f& a); 00107 00108 /// Dot product 00109 FXfloat operator*(const FXVec4f& v) const { return x*v.x+y*v.y+z*v.z+w*v.w; } 00110 00111 /// Test if zero 00112 FXbool operator!() const { return x==0.0f && y==0.0f && z==0.0f && w==0.0f; } 00113 00114 /// Equality tests 00115 FXbool operator==(const FXVec4f& v) const {return x==v.x && y==v.y && z==v.z && w==v.w; } 00116 FXbool operator!=(const FXVec4f& v) const {return x!=v.x || y!=v.y || z!=v.z || w!=v.w; } 00117 00118 friend inline FXbool operator==(const FXVec4f& a,FXfloat n); 00119 friend inline FXbool operator!=(const FXVec4f& a,FXfloat n); 00120 friend inline FXbool operator==(FXfloat n,const FXVec4f& a); 00121 friend inline FXbool operator!=(FXfloat n,const FXVec4f& a); 00122 00123 /// Inequality tests 00124 FXbool operator<(const FXVec4f& v) const { return x<v.x && y<v.y && z<v.z && w<v.w; } 00125 FXbool operator<=(const FXVec4f& v) const { return x<=v.x && y<=v.y && z<=v.z && w<=v.w; } 00126 FXbool operator>(const FXVec4f& v) const { return x>v.x && y>v.y && z>v.z && w>v.w; } 00127 FXbool operator>=(const FXVec4f& v) const { return x>=v.x && y>=v.y && z>=v.z && w>=v.w; } 00128 00129 friend inline FXbool operator<(const FXVec4f& a,FXfloat n); 00130 friend inline FXbool operator<=(const FXVec4f& a,FXfloat n); 00131 friend inline FXbool operator>(const FXVec4f& a,FXfloat n); 00132 friend inline FXbool operator>=(const FXVec4f& a,FXfloat n); 00133 00134 friend inline FXbool operator<(FXfloat n,const FXVec4f& a); 00135 friend inline FXbool operator<=(FXfloat n,const FXVec4f& a); 00136 friend inline FXbool operator>(FXfloat n,const FXVec4f& a); 00137 friend inline FXbool operator>=(FXfloat n,const FXVec4f& a); 00138 00139 /// Length and square of length 00140 FXfloat length2() const { return x*x+y*y+z*z+w*w; } 00141 FXfloat length() const { return sqrtf(length2()); } 00142 00143 /// Clamp values of vector between limits 00144 FXVec4f& clamp(FXfloat lo,FXfloat hi){x=FXCLAMP(lo,x,hi);y=FXCLAMP(lo,y,hi);z=FXCLAMP(lo,z,hi);w=FXCLAMP(lo,w,hi);return *this;} 00145 00146 /// Lowest or highest components 00147 friend inline FXVec4f lo(const FXVec4f& a,const FXVec4f& b); 00148 friend inline FXVec4f hi(const FXVec4f& a,const FXVec4f& b); 00149 00150 /// Compute normalized plane equation ax+by+cz+d=0 00151 friend FXAPI FXVec4f plane(const FXVec4f& vec); 00152 friend FXAPI FXVec4f plane(const FXVec3f& vec,FXfloat dist); 00153 friend FXAPI FXVec4f plane(const FXVec3f& vec,const FXVec3f& p); 00154 friend FXAPI FXVec4f plane(const FXVec3f& a,const FXVec3f& b,const FXVec3f& c); 00155 00156 /// Convert vector to color and back 00157 friend FXAPI FXColor colorFromVec4f(const FXVec4f& vec); 00158 friend FXAPI FXVec4f colorToVec4f(FXColor clr); 00159 00160 /// Signed distance normalized plane and point 00161 FXfloat distance(const FXVec3f& p) const; 00162 00163 /// Return true if edge a-b crosses plane 00164 FXbool crosses(const FXVec3f& a,const FXVec3f& b) const; 00165 00166 /// Normalize vector 00167 friend FXAPI FXVec4f normalize(const FXVec4f& v); 00168 00169 /// Save to a stream 00170 friend FXAPI FXStream& operator<<(FXStream& store,const FXVec4f& v); 00171 00172 /// Load from a stream 00173 friend FXAPI FXStream& operator>>(FXStream& store,FXVec4f& v); 00174 }; 00175 00176 00177 inline FXVec4f operator*(const FXVec4f& a,FXfloat n){return FXVec4f(a.x*n,a.y*n,a.z*n,a.w*n);} 00178 inline FXVec4f operator*(FXfloat n,const FXVec4f& a){return FXVec4f(n*a.x,n*a.y,n*a.z,n*a.w);} 00179 inline FXVec4f operator/(const FXVec4f& a,FXfloat n){return FXVec4f(a.x/n,a.y/n,a.z/n,a.w/n);} 00180 inline FXVec4f operator/(FXfloat n,const FXVec4f& a){return FXVec4f(n/a.x,n/a.y,n/a.z,n/a.w);} 00181 00182 inline FXbool operator==(const FXVec4f& a,FXfloat n){return a.x==n && a.y==n && a.z==n && a.w==n;} 00183 inline FXbool operator!=(const FXVec4f& a,FXfloat n){return a.x!=n || a.y!=n || a.z!=n || a.w!=n;} 00184 inline FXbool operator==(FXfloat n,const FXVec4f& a){return n==a.x && n==a.y && n==a.z && n==a.w;} 00185 inline FXbool operator!=(FXfloat n,const FXVec4f& a){return n!=a.x || n!=a.y || n!=a.z || n!=a.w;} 00186 00187 inline FXbool operator<(const FXVec4f& a,FXfloat n){return a.x<n && a.y<n && a.z<n && a.w<n;} 00188 inline FXbool operator<=(const FXVec4f& a,FXfloat n){return a.x<=n && a.y<=n && a.z<=n && a.w<=n;} 00189 inline FXbool operator>(const FXVec4f& a,FXfloat n){return a.x>n && a.y>n && a.z>n && a.w>n;} 00190 inline FXbool operator>=(const FXVec4f& a,FXfloat n){return a.x>=n && a.y>=n && a.z>=n && a.w>=n;} 00191 00192 inline FXbool operator<(FXfloat n,const FXVec4f& a){return n<a.x && n<a.y && n<a.z && n<a.w;} 00193 inline FXbool operator<=(FXfloat n,const FXVec4f& a){return n<=a.x && n<=a.y && n<=a.z && n<=a.w;} 00194 inline FXbool operator>(FXfloat n,const FXVec4f& a){return n>a.x && n>a.y && n>a.z && n>a.w;} 00195 inline FXbool operator>=(FXfloat n,const FXVec4f& a){return n>=a.x && n>=a.y && n>=a.z && n>=a.w;} 00196 00197 inline FXVec4f lo(const FXVec4f& a,const FXVec4f& b){return FXVec4f(FXMIN(a.x,b.x),FXMIN(a.y,b.y),FXMIN(a.z,b.z),FXMIN(a.w,b.w));} 00198 inline FXVec4f hi(const FXVec4f& a,const FXVec4f& b){return FXVec4f(FXMAX(a.x,b.x),FXMAX(a.y,b.y),FXMAX(a.z,b.z),FXMAX(a.w,b.w));} 00199 00200 extern FXAPI FXVec4f plane(const FXVec4f& vec); 00201 extern FXAPI FXVec4f plane(const FXVec3f& vec,FXfloat dist); 00202 extern FXAPI FXVec4f plane(const FXVec3f& vec,const FXVec3f& p); 00203 extern FXAPI FXVec4f plane(const FXVec3f& a,const FXVec3f& b,const FXVec3f& c); 00204 00205 extern FXAPI FXColor colorFromVec4f(const FXVec4f& vec); 00206 extern FXAPI FXVec4f colorToVec4f(FXColor clr); 00207 00208 extern FXAPI FXVec4f normalize(const FXVec4f& v); 00209 00210 extern FXAPI FXStream& operator<<(FXStream& store,const FXVec4f& v); 00211 extern FXAPI FXStream& operator>>(FXStream& store,FXVec4f& v); 00212 00213 } 00214 00215 #endif
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