Last change
on this file since 7924 was
5378,
checked in by jack, 17 years ago
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Inlined vector.h functions for performance.
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File size:
1.0 KB
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Line | |
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1 | #ifndef VECTOR_H |
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2 | #define VECTOR_H |
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3 | |
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4 | #include <math.h> |
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5 | |
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6 | typedef float vector[3]; |
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7 | |
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8 | /* Useful vector operations. */ |
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9 | static inline void vadd(const vector v1, const vector v2, vector result){ |
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10 | int i; |
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11 | for(i = 0 ; i < 3 ; i++) result[i] = v1[i] + v2[i]; |
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12 | } |
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13 | |
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14 | static inline float vlen(const vector v){ |
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15 | return sqrt(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]); |
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16 | } |
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17 | |
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18 | static inline void vscale(const vector v, const float scale, vector result){ |
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19 | int i; |
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20 | for(i = 0 ; i < 3 ; i++) result[i] = scale * v[i]; |
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21 | } |
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22 | |
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23 | static inline void vsub(const vector v1, const vector v2, vector result){ |
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24 | int i; |
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25 | for(i = 0 ; i < 3 ; i++) result[i] = v1[i] - v2[i]; |
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26 | } |
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27 | |
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28 | static inline float vdot(const vector v1, const vector v2){ |
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29 | int i; |
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30 | float rv = 0; |
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31 | for(i = 0 ; i < 3 ; i++) rv += v1[i] * v2[i]; |
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32 | return rv; |
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33 | } |
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34 | |
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35 | static inline void vcross(const vector v1, const vector v2, vector result){ |
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36 | result[0] = v1[1] * v2[2] - v1[2] * v2[1]; |
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37 | result[1] = v1[2] * v2[0] - v1[0] * v2[2]; |
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38 | result[2] = v1[0] * v2[1] - v1[1] * v2[0]; |
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39 | } |
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40 | |
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41 | #endif |
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