1 | |
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2 | /* |
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3 | * ---------------------------------------------------------------------- |
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4 | * Vector4.h: Vector4 class |
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5 | * |
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6 | * ====================================================================== |
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7 | * AUTHOR: Wei Qiao <qiaow@purdue.edu> |
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8 | * Purdue Rendering and Perceptualization Lab (PURPL) |
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9 | * |
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10 | * Copyright (c) 2004-2006 Purdue Research Foundation |
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11 | * |
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12 | * See the file "license.terms" for information on usage and |
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13 | * redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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14 | * ====================================================================== |
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15 | */ |
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16 | #ifndef _VECTOR4_H_ |
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17 | #define _VECTOR4_H_ |
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18 | |
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19 | #include <stdio.h> |
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20 | |
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21 | class Vector4 |
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22 | { |
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23 | public: |
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24 | float x, y, z, w; |
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25 | |
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26 | Vector4(void) { |
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27 | /*empty*/ |
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28 | } |
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29 | Vector4(float x_val, float y_val, float z_val, float w_val) { |
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30 | set(x_val, y_val, z_val, w_val); |
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31 | } |
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32 | void perspective_devide(void) { |
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33 | /* Divide vector by w */ |
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34 | x /= w, y /= w, z /= w, w = 1.; |
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35 | } |
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36 | |
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37 | void print(void) { |
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38 | fprintf(stderr, "Vector4: (%.3f, %.3f, %.3f, %.3f)\n", x, y, z, w); |
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39 | } |
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40 | |
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41 | Vector4 operator +(Vector4 &op2){ |
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42 | return Vector4(x + op2.x, y + op2.y, z + op2.z, w + op2.w); |
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43 | } |
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44 | |
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45 | Vector4 operator -(Vector4 &op2){ |
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46 | return Vector4(x - op2.x, y - op2.y, z - op2.z, w - op2.w); |
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47 | } |
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48 | |
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49 | float operator *(Vector4 &op2) { |
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50 | return (x * op2.x) + (y * op2.y) + (z * op2.z) + (w * op2.w); |
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51 | } |
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52 | |
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53 | Vector4 operator *(float op2){ |
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54 | return Vector4(x * op2, y * op2, z * op2, w * op2); |
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55 | } |
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56 | |
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57 | Vector4 operator /(float op2) { |
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58 | return Vector4(x / op2, y / op2, z / op2, w / op2); |
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59 | } |
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60 | |
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61 | void operator <(Vector4 &op2) { |
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62 | set(op2.x, op2.y, op2.z, op2.w); |
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63 | } |
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64 | void set(float x_val, float y_val, float z_val, float w_val) { |
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65 | x = x_val, y = y_val, z = z_val, w = w_val; |
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66 | } |
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67 | }; |
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68 | |
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69 | #endif |
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