Simple Vector Library 1.5 http://www.cs.cmu.edu/~ajw/doc/svl.html
Vec2.h@1:e25ff4b06ed2, 2016-01-05 (annotated)
- Committer:
- BartJanssens
- Date:
- Tue Jan 05 13:37:50 2016 +0000
- Revision:
- 1:e25ff4b06ed2
- Parent:
- 0:785cff1e5a7c
fixed va_list bug
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
BartJanssens | 0:785cff1e5a7c | 1 | /* |
BartJanssens | 0:785cff1e5a7c | 2 | File: Vec2.h |
BartJanssens | 0:785cff1e5a7c | 3 | |
BartJanssens | 0:785cff1e5a7c | 4 | Function: Defines a length-2 vector. |
BartJanssens | 0:785cff1e5a7c | 5 | |
BartJanssens | 0:785cff1e5a7c | 6 | Author(s): Andrew Willmott |
BartJanssens | 0:785cff1e5a7c | 7 | |
BartJanssens | 0:785cff1e5a7c | 8 | Copyright: (c) 1995-2001, Andrew Willmott |
BartJanssens | 0:785cff1e5a7c | 9 | */ |
BartJanssens | 0:785cff1e5a7c | 10 | |
BartJanssens | 0:785cff1e5a7c | 11 | #ifndef __Vec2__ |
BartJanssens | 0:785cff1e5a7c | 12 | #define __Vec2__ |
BartJanssens | 0:785cff1e5a7c | 13 | #include "Constants.h" |
BartJanssens | 0:785cff1e5a7c | 14 | #include "Basics.h" |
BartJanssens | 0:785cff1e5a7c | 15 | |
BartJanssens | 0:785cff1e5a7c | 16 | // --- Vec2 Class ------------------------------------------------------------- |
BartJanssens | 0:785cff1e5a7c | 17 | |
BartJanssens | 0:785cff1e5a7c | 18 | |
BartJanssens | 0:785cff1e5a7c | 19 | class Vec2 |
BartJanssens | 0:785cff1e5a7c | 20 | { |
BartJanssens | 0:785cff1e5a7c | 21 | public: |
BartJanssens | 0:785cff1e5a7c | 22 | |
BartJanssens | 0:785cff1e5a7c | 23 | // Constructors |
BartJanssens | 0:785cff1e5a7c | 24 | |
BartJanssens | 0:785cff1e5a7c | 25 | Vec2(); |
BartJanssens | 0:785cff1e5a7c | 26 | Vec2(double x, double y); // (x, y) |
BartJanssens | 0:785cff1e5a7c | 27 | Vec2(const Vec2 &v); // Copy constructor |
BartJanssens | 0:785cff1e5a7c | 28 | Vec2(ZeroOrOne k); // v[i] = vl_zero |
BartJanssens | 0:785cff1e5a7c | 29 | Vec2(Axis k); // v[k] = 1 |
BartJanssens | 0:785cff1e5a7c | 30 | |
BartJanssens | 0:785cff1e5a7c | 31 | // Accessor functions |
BartJanssens | 0:785cff1e5a7c | 32 | |
BartJanssens | 0:785cff1e5a7c | 33 | double &operator [] (Int i); |
BartJanssens | 0:785cff1e5a7c | 34 | const double &operator [] (Int i) const; |
BartJanssens | 0:785cff1e5a7c | 35 | |
BartJanssens | 0:785cff1e5a7c | 36 | Int Elts() const { return(2); }; |
BartJanssens | 0:785cff1e5a7c | 37 | double *Ref() const; // Return ptr to data |
BartJanssens | 0:785cff1e5a7c | 38 | |
BartJanssens | 0:785cff1e5a7c | 39 | // Assignment operators |
BartJanssens | 0:785cff1e5a7c | 40 | |
BartJanssens | 0:785cff1e5a7c | 41 | Vec2 &operator = (const Vec2 &a); |
BartJanssens | 0:785cff1e5a7c | 42 | Vec2 &operator = (ZeroOrOne k); |
BartJanssens | 0:785cff1e5a7c | 43 | Vec2 &operator = (Axis k); |
BartJanssens | 0:785cff1e5a7c | 44 | |
BartJanssens | 0:785cff1e5a7c | 45 | Vec2 &operator += (const Vec2 &a); |
BartJanssens | 0:785cff1e5a7c | 46 | Vec2 &operator -= (const Vec2 &a); |
BartJanssens | 0:785cff1e5a7c | 47 | Vec2 &operator *= (const Vec2 &a); |
BartJanssens | 0:785cff1e5a7c | 48 | Vec2 &operator *= (double s); |
BartJanssens | 0:785cff1e5a7c | 49 | Vec2 &operator /= (const Vec2 &a); |
BartJanssens | 0:785cff1e5a7c | 50 | Vec2 &operator /= (double s); |
BartJanssens | 0:785cff1e5a7c | 51 | |
BartJanssens | 0:785cff1e5a7c | 52 | // Comparison operators |
BartJanssens | 0:785cff1e5a7c | 53 | |
BartJanssens | 0:785cff1e5a7c | 54 | bool operator == (const Vec2 &a) const; // v == a? |
BartJanssens | 0:785cff1e5a7c | 55 | bool operator != (const Vec2 &a) const; // v != a? |
BartJanssens | 0:785cff1e5a7c | 56 | |
BartJanssens | 0:785cff1e5a7c | 57 | // Arithmetic operators |
BartJanssens | 0:785cff1e5a7c | 58 | |
BartJanssens | 0:785cff1e5a7c | 59 | Vec2 operator + (const Vec2 &a) const; // v + a |
BartJanssens | 0:785cff1e5a7c | 60 | Vec2 operator - (const Vec2 &a) const; // v - a |
BartJanssens | 0:785cff1e5a7c | 61 | Vec2 operator - () const; // -v |
BartJanssens | 0:785cff1e5a7c | 62 | Vec2 operator * (const Vec2 &a) const; // v * a (vx * ax, ...) |
BartJanssens | 0:785cff1e5a7c | 63 | Vec2 operator * (double s) const; // v * s |
BartJanssens | 0:785cff1e5a7c | 64 | Vec2 operator / (const Vec2 &a) const; // v / a (vx / ax, ...) |
BartJanssens | 0:785cff1e5a7c | 65 | Vec2 operator / (double s) const; // v / s |
BartJanssens | 0:785cff1e5a7c | 66 | |
BartJanssens | 0:785cff1e5a7c | 67 | // Initialisers |
BartJanssens | 0:785cff1e5a7c | 68 | |
BartJanssens | 0:785cff1e5a7c | 69 | Vec2 &MakeZero(); // Zero vector |
BartJanssens | 0:785cff1e5a7c | 70 | Vec2 &MakeUnit(Int i, double k = vl_one); // I[i] |
BartJanssens | 0:785cff1e5a7c | 71 | Vec2 &MakeBlock(double k = vl_one); // All-k vector |
BartJanssens | 0:785cff1e5a7c | 72 | |
BartJanssens | 0:785cff1e5a7c | 73 | Vec2 &Normalise(); // normalise vector |
BartJanssens | 0:785cff1e5a7c | 74 | |
BartJanssens | 0:785cff1e5a7c | 75 | // Private... |
BartJanssens | 0:785cff1e5a7c | 76 | |
BartJanssens | 0:785cff1e5a7c | 77 | protected: |
BartJanssens | 0:785cff1e5a7c | 78 | |
BartJanssens | 0:785cff1e5a7c | 79 | double elt[2]; |
BartJanssens | 0:785cff1e5a7c | 80 | }; |
BartJanssens | 0:785cff1e5a7c | 81 | |
BartJanssens | 0:785cff1e5a7c | 82 | |
BartJanssens | 0:785cff1e5a7c | 83 | // --- Vec operators ---------------------------------------------------------- |
BartJanssens | 0:785cff1e5a7c | 84 | |
BartJanssens | 0:785cff1e5a7c | 85 | inline Vec2 operator * (double s, const Vec2 &v); // s * v |
BartJanssens | 0:785cff1e5a7c | 86 | inline double dot(const Vec2 &a, const Vec2 &b); // v . a |
BartJanssens | 0:785cff1e5a7c | 87 | inline double len(const Vec2 &v); // || v || |
BartJanssens | 0:785cff1e5a7c | 88 | inline double sqrlen(const Vec2 &v); // v . v |
BartJanssens | 0:785cff1e5a7c | 89 | inline Vec2 norm(const Vec2 &v); // v / || v || |
BartJanssens | 0:785cff1e5a7c | 90 | inline void normalise(Vec2 &v); // v = norm(v) |
BartJanssens | 0:785cff1e5a7c | 91 | inline Vec2 cross(const Vec2 &v); // cross prod. |
BartJanssens | 0:785cff1e5a7c | 92 | |
BartJanssens | 0:785cff1e5a7c | 93 | //std::ostream &operator << (std::ostream &s, const Vec2 &v); |
BartJanssens | 0:785cff1e5a7c | 94 | //std::istream &operator >> (std::istream &s, Vec2 &v); |
BartJanssens | 0:785cff1e5a7c | 95 | |
BartJanssens | 0:785cff1e5a7c | 96 | inline void printVec2(const Vec2 &v); |
BartJanssens | 0:785cff1e5a7c | 97 | |
BartJanssens | 0:785cff1e5a7c | 98 | |
BartJanssens | 0:785cff1e5a7c | 99 | // --- Inlines ---------------------------------------------------------------- |
BartJanssens | 0:785cff1e5a7c | 100 | |
BartJanssens | 0:785cff1e5a7c | 101 | inline double &Vec2::operator [] (Int i) |
BartJanssens | 0:785cff1e5a7c | 102 | { |
BartJanssens | 0:785cff1e5a7c | 103 | CheckRange(i, 0, 2, "(Vec2::[i]) index out of range"); |
BartJanssens | 0:785cff1e5a7c | 104 | return(elt[i]); |
BartJanssens | 0:785cff1e5a7c | 105 | } |
BartJanssens | 0:785cff1e5a7c | 106 | |
BartJanssens | 0:785cff1e5a7c | 107 | inline const double &Vec2::operator [] (Int i) const |
BartJanssens | 0:785cff1e5a7c | 108 | { |
BartJanssens | 0:785cff1e5a7c | 109 | CheckRange(i, 0, 2, "(Vec2::[i]) index out of range"); |
BartJanssens | 0:785cff1e5a7c | 110 | return(elt[i]); |
BartJanssens | 0:785cff1e5a7c | 111 | } |
BartJanssens | 0:785cff1e5a7c | 112 | |
BartJanssens | 0:785cff1e5a7c | 113 | inline Vec2::Vec2() |
BartJanssens | 0:785cff1e5a7c | 114 | { |
BartJanssens | 0:785cff1e5a7c | 115 | } |
BartJanssens | 0:785cff1e5a7c | 116 | |
BartJanssens | 0:785cff1e5a7c | 117 | inline Vec2::Vec2(double x, double y) |
BartJanssens | 0:785cff1e5a7c | 118 | { |
BartJanssens | 0:785cff1e5a7c | 119 | elt[0] = x; |
BartJanssens | 0:785cff1e5a7c | 120 | elt[1] = y; |
BartJanssens | 0:785cff1e5a7c | 121 | } |
BartJanssens | 0:785cff1e5a7c | 122 | |
BartJanssens | 0:785cff1e5a7c | 123 | inline Vec2::Vec2(const Vec2 &v) |
BartJanssens | 0:785cff1e5a7c | 124 | { |
BartJanssens | 0:785cff1e5a7c | 125 | elt[0] = v[0]; |
BartJanssens | 0:785cff1e5a7c | 126 | elt[1] = v[1]; |
BartJanssens | 0:785cff1e5a7c | 127 | } |
BartJanssens | 0:785cff1e5a7c | 128 | |
BartJanssens | 0:785cff1e5a7c | 129 | inline double *Vec2::Ref() const |
BartJanssens | 0:785cff1e5a7c | 130 | { |
BartJanssens | 0:785cff1e5a7c | 131 | return((double *) elt); |
BartJanssens | 0:785cff1e5a7c | 132 | } |
BartJanssens | 0:785cff1e5a7c | 133 | |
BartJanssens | 0:785cff1e5a7c | 134 | inline Vec2 &Vec2::operator = (const Vec2 &v) |
BartJanssens | 0:785cff1e5a7c | 135 | { |
BartJanssens | 0:785cff1e5a7c | 136 | elt[0] = v[0]; |
BartJanssens | 0:785cff1e5a7c | 137 | elt[1] = v[1]; |
BartJanssens | 0:785cff1e5a7c | 138 | |
BartJanssens | 0:785cff1e5a7c | 139 | return(SELF); |
BartJanssens | 0:785cff1e5a7c | 140 | } |
BartJanssens | 0:785cff1e5a7c | 141 | |
BartJanssens | 0:785cff1e5a7c | 142 | inline Vec2 &Vec2::operator += (const Vec2 &v) |
BartJanssens | 0:785cff1e5a7c | 143 | { |
BartJanssens | 0:785cff1e5a7c | 144 | elt[0] += v[0]; |
BartJanssens | 0:785cff1e5a7c | 145 | elt[1] += v[1]; |
BartJanssens | 0:785cff1e5a7c | 146 | |
BartJanssens | 0:785cff1e5a7c | 147 | return(SELF); |
BartJanssens | 0:785cff1e5a7c | 148 | } |
BartJanssens | 0:785cff1e5a7c | 149 | |
BartJanssens | 0:785cff1e5a7c | 150 | inline Vec2 &Vec2::operator -= (const Vec2 &v) |
BartJanssens | 0:785cff1e5a7c | 151 | { |
BartJanssens | 0:785cff1e5a7c | 152 | elt[0] -= v[0]; |
BartJanssens | 0:785cff1e5a7c | 153 | elt[1] -= v[1]; |
BartJanssens | 0:785cff1e5a7c | 154 | |
BartJanssens | 0:785cff1e5a7c | 155 | return(SELF); |
BartJanssens | 0:785cff1e5a7c | 156 | } |
BartJanssens | 0:785cff1e5a7c | 157 | |
BartJanssens | 0:785cff1e5a7c | 158 | inline Vec2 &Vec2::operator *= (const Vec2 &v) |
BartJanssens | 0:785cff1e5a7c | 159 | { |
BartJanssens | 0:785cff1e5a7c | 160 | elt[0] *= v[0]; |
BartJanssens | 0:785cff1e5a7c | 161 | elt[1] *= v[1]; |
BartJanssens | 0:785cff1e5a7c | 162 | |
BartJanssens | 0:785cff1e5a7c | 163 | return(SELF); |
BartJanssens | 0:785cff1e5a7c | 164 | } |
BartJanssens | 0:785cff1e5a7c | 165 | |
BartJanssens | 0:785cff1e5a7c | 166 | inline Vec2 &Vec2::operator *= (double s) |
BartJanssens | 0:785cff1e5a7c | 167 | { |
BartJanssens | 0:785cff1e5a7c | 168 | elt[0] *= s; |
BartJanssens | 0:785cff1e5a7c | 169 | elt[1] *= s; |
BartJanssens | 0:785cff1e5a7c | 170 | |
BartJanssens | 0:785cff1e5a7c | 171 | return(SELF); |
BartJanssens | 0:785cff1e5a7c | 172 | } |
BartJanssens | 0:785cff1e5a7c | 173 | |
BartJanssens | 0:785cff1e5a7c | 174 | inline Vec2 &Vec2::operator /= (const Vec2 &v) |
BartJanssens | 0:785cff1e5a7c | 175 | { |
BartJanssens | 0:785cff1e5a7c | 176 | elt[0] /= v[0]; |
BartJanssens | 0:785cff1e5a7c | 177 | elt[1] /= v[1]; |
BartJanssens | 0:785cff1e5a7c | 178 | |
BartJanssens | 0:785cff1e5a7c | 179 | return(SELF); |
BartJanssens | 0:785cff1e5a7c | 180 | } |
BartJanssens | 0:785cff1e5a7c | 181 | |
BartJanssens | 0:785cff1e5a7c | 182 | inline Vec2 &Vec2::operator /= (double s) |
BartJanssens | 0:785cff1e5a7c | 183 | { |
BartJanssens | 0:785cff1e5a7c | 184 | elt[0] /= s; |
BartJanssens | 0:785cff1e5a7c | 185 | elt[1] /= s; |
BartJanssens | 0:785cff1e5a7c | 186 | |
BartJanssens | 0:785cff1e5a7c | 187 | return(SELF); |
BartJanssens | 0:785cff1e5a7c | 188 | } |
BartJanssens | 0:785cff1e5a7c | 189 | |
BartJanssens | 0:785cff1e5a7c | 190 | inline Vec2 Vec2::operator + (const Vec2 &a) const |
BartJanssens | 0:785cff1e5a7c | 191 | { |
BartJanssens | 0:785cff1e5a7c | 192 | Vec2 result; |
BartJanssens | 0:785cff1e5a7c | 193 | |
BartJanssens | 0:785cff1e5a7c | 194 | result[0] = elt[0] + a[0]; |
BartJanssens | 0:785cff1e5a7c | 195 | result[1] = elt[1] + a[1]; |
BartJanssens | 0:785cff1e5a7c | 196 | |
BartJanssens | 0:785cff1e5a7c | 197 | return(result); |
BartJanssens | 0:785cff1e5a7c | 198 | } |
BartJanssens | 0:785cff1e5a7c | 199 | |
BartJanssens | 0:785cff1e5a7c | 200 | inline Vec2 Vec2::operator - (const Vec2 &a) const |
BartJanssens | 0:785cff1e5a7c | 201 | { |
BartJanssens | 0:785cff1e5a7c | 202 | Vec2 result; |
BartJanssens | 0:785cff1e5a7c | 203 | |
BartJanssens | 0:785cff1e5a7c | 204 | result[0] = elt[0] - a[0]; |
BartJanssens | 0:785cff1e5a7c | 205 | result[1] = elt[1] - a[1]; |
BartJanssens | 0:785cff1e5a7c | 206 | |
BartJanssens | 0:785cff1e5a7c | 207 | return(result); |
BartJanssens | 0:785cff1e5a7c | 208 | } |
BartJanssens | 0:785cff1e5a7c | 209 | |
BartJanssens | 0:785cff1e5a7c | 210 | inline Vec2 Vec2::operator - () const |
BartJanssens | 0:785cff1e5a7c | 211 | { |
BartJanssens | 0:785cff1e5a7c | 212 | Vec2 result; |
BartJanssens | 0:785cff1e5a7c | 213 | |
BartJanssens | 0:785cff1e5a7c | 214 | result[0] = -elt[0]; |
BartJanssens | 0:785cff1e5a7c | 215 | result[1] = -elt[1]; |
BartJanssens | 0:785cff1e5a7c | 216 | |
BartJanssens | 0:785cff1e5a7c | 217 | return(result); |
BartJanssens | 0:785cff1e5a7c | 218 | } |
BartJanssens | 0:785cff1e5a7c | 219 | |
BartJanssens | 0:785cff1e5a7c | 220 | inline Vec2 Vec2::operator * (const Vec2 &a) const |
BartJanssens | 0:785cff1e5a7c | 221 | { |
BartJanssens | 0:785cff1e5a7c | 222 | Vec2 result; |
BartJanssens | 0:785cff1e5a7c | 223 | |
BartJanssens | 0:785cff1e5a7c | 224 | result[0] = elt[0] * a[0]; |
BartJanssens | 0:785cff1e5a7c | 225 | result[1] = elt[1] * a[1]; |
BartJanssens | 0:785cff1e5a7c | 226 | |
BartJanssens | 0:785cff1e5a7c | 227 | return(result); |
BartJanssens | 0:785cff1e5a7c | 228 | } |
BartJanssens | 0:785cff1e5a7c | 229 | |
BartJanssens | 0:785cff1e5a7c | 230 | inline Vec2 Vec2::operator * (double s) const |
BartJanssens | 0:785cff1e5a7c | 231 | { |
BartJanssens | 0:785cff1e5a7c | 232 | Vec2 result; |
BartJanssens | 0:785cff1e5a7c | 233 | |
BartJanssens | 0:785cff1e5a7c | 234 | result[0] = elt[0] * s; |
BartJanssens | 0:785cff1e5a7c | 235 | result[1] = elt[1] * s; |
BartJanssens | 0:785cff1e5a7c | 236 | |
BartJanssens | 0:785cff1e5a7c | 237 | return(result); |
BartJanssens | 0:785cff1e5a7c | 238 | } |
BartJanssens | 0:785cff1e5a7c | 239 | |
BartJanssens | 0:785cff1e5a7c | 240 | inline Vec2 operator * (double s, const Vec2 &v) |
BartJanssens | 0:785cff1e5a7c | 241 | { |
BartJanssens | 0:785cff1e5a7c | 242 | return(v * s); |
BartJanssens | 0:785cff1e5a7c | 243 | } |
BartJanssens | 0:785cff1e5a7c | 244 | |
BartJanssens | 0:785cff1e5a7c | 245 | inline Vec2 Vec2::operator / (const Vec2 &a) const |
BartJanssens | 0:785cff1e5a7c | 246 | { |
BartJanssens | 0:785cff1e5a7c | 247 | Vec2 result; |
BartJanssens | 0:785cff1e5a7c | 248 | |
BartJanssens | 0:785cff1e5a7c | 249 | result[0] = elt[0] / a[0]; |
BartJanssens | 0:785cff1e5a7c | 250 | result[1] = elt[1] / a[1]; |
BartJanssens | 0:785cff1e5a7c | 251 | |
BartJanssens | 0:785cff1e5a7c | 252 | return(result); |
BartJanssens | 0:785cff1e5a7c | 253 | } |
BartJanssens | 0:785cff1e5a7c | 254 | |
BartJanssens | 0:785cff1e5a7c | 255 | inline Vec2 Vec2::operator / (double s) const |
BartJanssens | 0:785cff1e5a7c | 256 | { |
BartJanssens | 0:785cff1e5a7c | 257 | Vec2 result; |
BartJanssens | 0:785cff1e5a7c | 258 | |
BartJanssens | 0:785cff1e5a7c | 259 | result[0] = elt[0] / s; |
BartJanssens | 0:785cff1e5a7c | 260 | result[1] = elt[1] / s; |
BartJanssens | 0:785cff1e5a7c | 261 | |
BartJanssens | 0:785cff1e5a7c | 262 | return(result); |
BartJanssens | 0:785cff1e5a7c | 263 | } |
BartJanssens | 0:785cff1e5a7c | 264 | |
BartJanssens | 0:785cff1e5a7c | 265 | inline double dot(const Vec2 &a, const Vec2 &b) |
BartJanssens | 0:785cff1e5a7c | 266 | { |
BartJanssens | 0:785cff1e5a7c | 267 | return(a[0] * b[0] + a[1] * b[1]); |
BartJanssens | 0:785cff1e5a7c | 268 | } |
BartJanssens | 0:785cff1e5a7c | 269 | |
BartJanssens | 0:785cff1e5a7c | 270 | inline Vec2 cross(const Vec2 &a) |
BartJanssens | 0:785cff1e5a7c | 271 | { |
BartJanssens | 0:785cff1e5a7c | 272 | Vec2 result; |
BartJanssens | 0:785cff1e5a7c | 273 | |
BartJanssens | 0:785cff1e5a7c | 274 | result[0] = a[1]; |
BartJanssens | 0:785cff1e5a7c | 275 | result[1] = -a[0]; |
BartJanssens | 0:785cff1e5a7c | 276 | |
BartJanssens | 0:785cff1e5a7c | 277 | return(result); |
BartJanssens | 0:785cff1e5a7c | 278 | } |
BartJanssens | 0:785cff1e5a7c | 279 | |
BartJanssens | 0:785cff1e5a7c | 280 | inline double len(const Vec2 &v) |
BartJanssens | 0:785cff1e5a7c | 281 | { |
BartJanssens | 0:785cff1e5a7c | 282 | return(sqrt(dot(v, v))); |
BartJanssens | 0:785cff1e5a7c | 283 | } |
BartJanssens | 0:785cff1e5a7c | 284 | |
BartJanssens | 0:785cff1e5a7c | 285 | inline double sqrlen(const Vec2 &v) |
BartJanssens | 0:785cff1e5a7c | 286 | { |
BartJanssens | 0:785cff1e5a7c | 287 | return(dot(v, v)); |
BartJanssens | 0:785cff1e5a7c | 288 | } |
BartJanssens | 0:785cff1e5a7c | 289 | |
BartJanssens | 0:785cff1e5a7c | 290 | inline Vec2 norm(const Vec2 &v) |
BartJanssens | 0:785cff1e5a7c | 291 | { |
BartJanssens | 0:785cff1e5a7c | 292 | Assert(sqrlen(v) > 0.0, "normalising length-zero vector"); |
BartJanssens | 0:785cff1e5a7c | 293 | return(v / len(v)); |
BartJanssens | 0:785cff1e5a7c | 294 | } |
BartJanssens | 0:785cff1e5a7c | 295 | |
BartJanssens | 0:785cff1e5a7c | 296 | inline void normalise(Vec2 &v) |
BartJanssens | 0:785cff1e5a7c | 297 | { |
BartJanssens | 0:785cff1e5a7c | 298 | v /= len(v); |
BartJanssens | 0:785cff1e5a7c | 299 | } |
BartJanssens | 0:785cff1e5a7c | 300 | |
BartJanssens | 0:785cff1e5a7c | 301 | inline Vec2 &Vec2::MakeUnit(Int i, double k) |
BartJanssens | 0:785cff1e5a7c | 302 | { |
BartJanssens | 0:785cff1e5a7c | 303 | if (i == 0) |
BartJanssens | 0:785cff1e5a7c | 304 | { elt[0] = k; elt[1] = vl_zero; } |
BartJanssens | 0:785cff1e5a7c | 305 | else if (i == 1) |
BartJanssens | 0:785cff1e5a7c | 306 | { elt[0] = vl_zero; elt[1] = k; } |
BartJanssens | 0:785cff1e5a7c | 307 | else |
BartJanssens | 0:785cff1e5a7c | 308 | _Error("(Vec2::Unit) illegal unit vector"); |
BartJanssens | 0:785cff1e5a7c | 309 | return(SELF); |
BartJanssens | 0:785cff1e5a7c | 310 | } |
BartJanssens | 0:785cff1e5a7c | 311 | |
BartJanssens | 0:785cff1e5a7c | 312 | inline Vec2 &Vec2::MakeZero() |
BartJanssens | 0:785cff1e5a7c | 313 | { |
BartJanssens | 0:785cff1e5a7c | 314 | elt[0] = vl_zero; elt[1] = vl_zero; |
BartJanssens | 0:785cff1e5a7c | 315 | return(SELF); |
BartJanssens | 0:785cff1e5a7c | 316 | } |
BartJanssens | 0:785cff1e5a7c | 317 | |
BartJanssens | 0:785cff1e5a7c | 318 | inline Vec2 &Vec2::MakeBlock(double k) |
BartJanssens | 0:785cff1e5a7c | 319 | { |
BartJanssens | 0:785cff1e5a7c | 320 | elt[0] = k; elt[1] = k; |
BartJanssens | 0:785cff1e5a7c | 321 | return(SELF); |
BartJanssens | 0:785cff1e5a7c | 322 | } |
BartJanssens | 0:785cff1e5a7c | 323 | |
BartJanssens | 0:785cff1e5a7c | 324 | inline Vec2 &Vec2::Normalise() |
BartJanssens | 0:785cff1e5a7c | 325 | { |
BartJanssens | 0:785cff1e5a7c | 326 | Assert(sqrlen(SELF) > 0.0, "normalising length-zero vector"); |
BartJanssens | 0:785cff1e5a7c | 327 | SELF /= len(SELF); |
BartJanssens | 0:785cff1e5a7c | 328 | return(SELF); |
BartJanssens | 0:785cff1e5a7c | 329 | } |
BartJanssens | 0:785cff1e5a7c | 330 | |
BartJanssens | 0:785cff1e5a7c | 331 | |
BartJanssens | 0:785cff1e5a7c | 332 | inline Vec2::Vec2(ZeroOrOne k) |
BartJanssens | 0:785cff1e5a7c | 333 | { |
BartJanssens | 0:785cff1e5a7c | 334 | elt[0] = k; |
BartJanssens | 0:785cff1e5a7c | 335 | elt[1] = k; |
BartJanssens | 0:785cff1e5a7c | 336 | } |
BartJanssens | 0:785cff1e5a7c | 337 | |
BartJanssens | 0:785cff1e5a7c | 338 | inline Vec2::Vec2(Axis k) |
BartJanssens | 0:785cff1e5a7c | 339 | { |
BartJanssens | 0:785cff1e5a7c | 340 | MakeUnit(k, vl_one); |
BartJanssens | 0:785cff1e5a7c | 341 | } |
BartJanssens | 0:785cff1e5a7c | 342 | |
BartJanssens | 0:785cff1e5a7c | 343 | inline Vec2 &Vec2::operator = (ZeroOrOne k) |
BartJanssens | 0:785cff1e5a7c | 344 | { |
BartJanssens | 0:785cff1e5a7c | 345 | elt[0] = k; elt[1] = k; |
BartJanssens | 0:785cff1e5a7c | 346 | |
BartJanssens | 0:785cff1e5a7c | 347 | return(SELF); |
BartJanssens | 0:785cff1e5a7c | 348 | } |
BartJanssens | 0:785cff1e5a7c | 349 | |
BartJanssens | 0:785cff1e5a7c | 350 | inline Vec2 &Vec2::operator = (Axis k) |
BartJanssens | 0:785cff1e5a7c | 351 | { |
BartJanssens | 0:785cff1e5a7c | 352 | MakeUnit(k, vl_1); |
BartJanssens | 0:785cff1e5a7c | 353 | |
BartJanssens | 0:785cff1e5a7c | 354 | return(SELF); |
BartJanssens | 0:785cff1e5a7c | 355 | } |
BartJanssens | 0:785cff1e5a7c | 356 | |
BartJanssens | 0:785cff1e5a7c | 357 | inline bool Vec2::operator == (const Vec2 &a) const |
BartJanssens | 0:785cff1e5a7c | 358 | { |
BartJanssens | 0:785cff1e5a7c | 359 | return(elt[0] == a[0] && elt[1] == a[1]); |
BartJanssens | 0:785cff1e5a7c | 360 | } |
BartJanssens | 0:785cff1e5a7c | 361 | |
BartJanssens | 0:785cff1e5a7c | 362 | inline bool Vec2::operator != (const Vec2 &a) const |
BartJanssens | 0:785cff1e5a7c | 363 | { |
BartJanssens | 0:785cff1e5a7c | 364 | return(elt[0] != a[0] || elt[1] != a[1]); |
BartJanssens | 0:785cff1e5a7c | 365 | } |
BartJanssens | 0:785cff1e5a7c | 366 | |
BartJanssens | 0:785cff1e5a7c | 367 | inline void printVec2(const Vec2 &v) |
BartJanssens | 0:785cff1e5a7c | 368 | { |
BartJanssens | 0:785cff1e5a7c | 369 | printf("[%10f %10f]",v[0],v[1]); |
BartJanssens | 0:785cff1e5a7c | 370 | } |
BartJanssens | 0:785cff1e5a7c | 371 | |
BartJanssens | 0:785cff1e5a7c | 372 | |
BartJanssens | 0:785cff1e5a7c | 373 | #endif |