1 // Copyright 2016 The SwiftShader Authors. All Rights Reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef Point_hpp 16 #define Point_hpp 17 18 namespace sw 19 { 20 struct Vector; 21 struct Matrix; 22 23 struct Point 24 { 25 Point(); 26 Point(const int i); 27 Point(const Point &P); 28 Point(const Vector &v); 29 Point(float Px, float Py, float Pz); 30 31 Point &operator=(const Point &P); 32 33 union 34 { 35 float p[3]; 36 37 struct 38 { 39 float x; 40 float y; 41 float z; 42 }; 43 }; 44 45 float &operator[](int i); 46 float &operator()(int i); 47 48 const float &operator[](int i) const; 49 const float &operator()(int i) const; 50 51 Point &operator+=(const Vector &v); 52 Point &operator-=(const Vector &v); 53 54 friend Point operator+(const Point &P, const Vector &v); 55 friend Point operator-(const Point &P, const Vector &v); 56 57 friend Vector operator-(const Point &P, const Point &Q); 58 59 friend Point operator*(const Matrix &M, const Point& P); 60 friend Point operator*(const Point &P, const Matrix &M); 61 friend Point &operator*=(Point &P, const Matrix &M); 62 63 float d(const Point &P) const; // Distance between two points 64 float d2(const Point &P) const; // Squared distance between two points 65 66 static float d(const Point &P, const Point &Q); // Distance between two points 67 static float d2(const Point &P, const Point &Q); // Squared distance between two points 68 }; 69 } 70 71 #include "Vector.hpp" 72 73 namespace sw 74 { 75 inline Point::Point() 76 { 77 } 78 79 inline Point::Point(const int i) 80 { 81 const float s = (float)i; 82 83 x = s; 84 y = s; 85 z = s; 86 } 87 88 inline Point::Point(const Point &P) 89 { 90 x = P.x; 91 y = P.y; 92 z = P.z; 93 } 94 95 inline Point::Point(const Vector &v) 96 { 97 x = v.x; 98 y = v.y; 99 z = v.z; 100 } 101 102 inline Point::Point(float P_x, float P_y, float P_z) 103 { 104 x = P_x; 105 y = P_y; 106 z = P_z; 107 } 108 109 inline Point &Point::operator=(const Point &P) 110 { 111 x = P.x; 112 y = P.y; 113 z = P.z; 114 115 return *this; 116 } 117 118 inline float &Point::operator()(int i) 119 { 120 return p[i]; 121 } 122 123 inline float &Point::operator[](int i) 124 { 125 return p[i]; 126 } 127 128 inline const float &Point::operator()(int i) const 129 { 130 return p[i]; 131 } 132 133 inline const float &Point::operator[](int i) const 134 { 135 return p[i]; 136 } 137 } 138 139 #endif // Point_hpp 140
