Mercurial > hgrepos > Python2 > PyMuPDF
annotate mupdf-source/thirdparty/freeglut/progs/demos/Lorenz/lorenz.c @ 20:eb3dd22fef2c
FIX: the new "sdist" build target is PHONY also
| author | Franz Glasner <fzglas.hg@dom66.de> |
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| date | Thu, 18 Sep 2025 22:04:13 +0200 |
| parents | b50eed0cc0ef |
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| rev | line source |
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1 /* |
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2 * Lorenz Strange Attractor |
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3 * |
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4 * Written by John F. Fay in honor of the "freeglut" 2.0.0 release in July 2003 |
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5 * |
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6 * What it does: |
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7 * This program starts with two particles right next to each other. The particles |
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8 * move through a three-dimensional phase space governed by the following equations: |
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9 * dx/dt = sigma * ( y - x ) |
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10 * dy/dt = r * x - y + x * z |
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11 * dz/dt = x * y + b * z |
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12 * These are the Lorenz equations and define the "Lorenz Attractor." Any two particles |
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13 * arbitrarily close together will move apart as time increases, but their tracks are |
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14 * confined within a region of the space. |
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15 * |
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16 * Commands: |
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17 * Arrow keys: Rotate the view |
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18 * PgUp, PgDn: Zoom in and out |
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19 * Mouse click: Center on the nearest point on a particle trajectory |
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20 * |
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21 * 'r'/'R': Reset the simulation |
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22 * 'm'/'M': Modify the Lorenz parameters (in the text window) |
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23 * 's'/'S': Stop (the advancement in time) |
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24 * 'g'/'G': Go |
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25 * <spacebar>: Single-step |
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26 * <Escape>: Quit |
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27 */ |
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28 |
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29 /* Include Files */ |
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30 #include <stdio.h> |
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31 #include <stdlib.h> |
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32 #include <stdarg.h> |
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33 #include <string.h> |
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34 #include <math.h> |
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35 #include <GL/freeglut.h> |
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36 #ifdef _MSC_VER |
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37 /* DUMP MEMORY LEAKS */ |
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38 #include <crtdbg.h> |
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39 #endif |
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40 |
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41 |
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42 /************************************** Defined Constants ***************************************/ |
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43 /* Number of points to draw in the curves */ |
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44 #define NUM_POINTS 512 |
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45 |
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46 /* Angle to rotate when the user presses an arrow key */ |
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47 #define ROTATION_ANGLE 5.0 |
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48 |
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49 /* Amount to scale bu when the user presses PgUp or PgDn */ |
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50 #define SCALE_FACTOR 0.8 |
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51 |
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52 |
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53 /*************************************** Global Variables ***************************************/ |
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54 /* Lorenz Attractor variables */ |
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55 double s0 = 10.0, r0 = 28.0, b0 = 8.0/3.0 ; /* Default Lorenz attactor parameters */ |
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56 double time_step = 0.03 ; /* Time step in the simulation */ |
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57 double sigma = 10.0, r = 28.0, b = 8.0/3.0 ; /* Lorenz attactor parameters */ |
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58 double red_position[NUM_POINTS][3] ; /* Path of the red point */ |
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59 double grn_position[NUM_POINTS][3] ; /* Path of the green point */ |
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60 int array_index ; /* Position in *_position arrays of most recent point */ |
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61 double distance = 0.0 ; /* Distance between the two points */ |
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62 |
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63 /* GLUT variables */ |
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64 double yaw = 0.0, pit = 0.0 ; /* Euler angles of the viewing rotation */ |
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65 double scale = 1.0 ; /* Scale factor */ |
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66 double xcen = 0.0, ycen = 0.0, zcen = 0.0 ; /* Coordinates of the point looked at */ |
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67 |
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68 int animate = 1 ; /* 0 - stop, 1 = go, 2 = single-step */ |
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69 |
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70 |
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71 /******************************************* Functions ******************************************/ |
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72 |
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73 /* The Lorenz Attractor */ |
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74 void calc_deriv ( double position[3], double deriv[3] ) |
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75 { |
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76 /* Calculate the Lorenz attractor derivatives */ |
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77 deriv[0] = sigma * ( position[1] - position[0] ) ; |
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78 deriv[1] = ( r + position[2] ) * position[0] - position[1] ; |
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79 deriv[2] = -position[0] * position[1] - b * position[2] ; |
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80 } |
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81 |
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82 void advance_in_time ( double time_step, double position[3], double new_position[3] ) |
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83 { |
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84 /* Move a point along the Lorenz attractor */ |
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85 double deriv0[3], deriv1[3], deriv2[3], deriv3[3] ; |
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86 int i ; |
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
87 memcpy ( new_position, position, 3 * sizeof(double) ) ; /* Save the present values */ |
|
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parents:
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|
88 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
89 /* First pass in a Fourth-Order Runge-Kutta integration method */ |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
90 calc_deriv ( position, deriv0 ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
91 for ( i = 0; i < 3; i++ ) |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
92 new_position[i] = position[i] + 0.5 * time_step * deriv0[i] ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
93 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
94 /* Second pass */ |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
95 calc_deriv ( new_position, deriv1 ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
96 for ( i = 0; i < 3; i++ ) |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
97 new_position[i] = position[i] + 0.5 * time_step * deriv1[i] ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
98 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
99 /* Third pass */ |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
100 calc_deriv ( position, deriv2 ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
101 for ( i = 0; i < 3; i++ ) |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
102 new_position[i] = position[i] + time_step * deriv2[i] ; |
|
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parents:
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|
103 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
104 /* Second pass */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
105 calc_deriv ( new_position, deriv3 ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
106 for ( i = 0; i < 3; i++ ) |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
107 new_position[i] = position[i] + 0.1666666666666666667 * time_step * |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
108 ( deriv0[i] + 2.0 * ( deriv1[i] + deriv2[i] ) + deriv3[i] ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
109 } |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
110 |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
111 static void |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
112 checkedFGets ( char *s, int size, FILE *stream ) |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
113 { |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
114 if ( fgets ( s, size, stream ) == NULL ) { |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
115 fprintf ( stderr, "fgets failed\n"); |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
116 exit ( EXIT_FAILURE ); |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
117 } |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
118 } |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
119 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
120 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
121 /* GLUT callbacks */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
122 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
123 #define INPUT_LINE_LENGTH 80 |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
124 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
125 void key_cb ( unsigned char key, int x, int y ) |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
126 { |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
127 int i ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
128 char inputline [ INPUT_LINE_LENGTH ] ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
129 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
130 switch ( key ) |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
131 { |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
132 case 'r' : case 'R' : /* Reset the simulation */ |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
133 /* Reset the Lorenz parameters */ |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
134 sigma = s0 ; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
135 b = b0 ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
136 r = r0 ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
137 /* Set an initial position */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
138 red_position[0][0] = (double)rand() / (double)RAND_MAX ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
139 red_position[0][1] = (double)rand() / (double)RAND_MAX ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
140 red_position[0][2] = (double)rand() / (double)RAND_MAX ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
141 grn_position[0][0] = (double)rand() / (double)RAND_MAX ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
142 grn_position[0][1] = (double)rand() / (double)RAND_MAX ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
143 grn_position[0][2] = (double)rand() / (double)RAND_MAX ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
144 array_index = 0 ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
145 /* Initialize the arrays */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
146 for ( i = 1; i < NUM_POINTS; i++ ) |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
147 { |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
148 memcpy ( red_position[i], red_position[0], 3 * sizeof(double) ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
149 memcpy ( grn_position[i], grn_position[0], 3 * sizeof(double) ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
150 } |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
151 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
152 break ; |
|
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parents:
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|
153 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
154 case 'm' : case 'M' : /* Modify the Lorenz parameters */ |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
155 printf ( "Please enter new value for <sigma> (default %f, currently %f): ", s0, sigma ) ; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
156 checkedFGets ( inputline, sizeof ( inputline ), stdin ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
157 sscanf ( inputline, "%lf", &sigma ) ; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
158 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
159 printf ( "Please enter new value for <b> (default %f, currently %f): ", b0, b ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
160 checkedFGets ( inputline, sizeof ( inputline ), stdin ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
161 sscanf ( inputline, "%lf", &b ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
162 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
163 printf ( "Please enter new value for <r> (default %f, currently %f): ", r0, r ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
164 checkedFGets ( inputline, sizeof ( inputline ), stdin ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
165 sscanf ( inputline, "%lf", &r ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
166 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
167 break ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
168 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
169 case 's' : case 'S' : /* Stop the animation */ |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
170 animate = 0 ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
171 break ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
172 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
173 case 'g' : case 'G' : /* Start the animation */ |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
174 animate = 1 ; |
|
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|
175 break ; |
|
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|
176 |
|
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|
177 case ' ' : /* Spacebar: Single step */ |
|
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178 animate = 2 ; |
|
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parents:
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|
179 break ; |
|
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|
180 |
|
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|
181 case 27 : /* Escape key */ |
|
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|
182 glutLeaveMainLoop () ; |
|
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183 break ; |
|
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parents:
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|
184 } |
|
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parents:
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|
185 } |
|
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parents:
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|
186 |
|
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parents:
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|
187 void special_cb ( int key, int x, int y ) |
|
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188 { |
|
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parents:
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|
189 switch ( key ) |
|
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|
190 { |
|
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parents:
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|
191 case GLUT_KEY_UP : /* Rotate up a little */ |
|
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192 glRotated ( ROTATION_ANGLE, 0.0, 1.0, 0.0 ) ; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
193 break ; |
|
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parents:
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|
194 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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195 case GLUT_KEY_DOWN : /* Rotate down a little */ |
|
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196 glRotated ( -ROTATION_ANGLE, 0.0, 1.0, 0.0 ) ; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
197 break ; |
|
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parents:
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|
198 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
199 case GLUT_KEY_LEFT : /* Rotate left a little */ |
|
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parents:
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|
200 glRotated ( ROTATION_ANGLE, 0.0, 0.0, 1.0 ) ; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
201 break ; |
|
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parents:
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|
202 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
203 case GLUT_KEY_RIGHT : /* Rotate right a little */ |
|
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parents:
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|
204 glRotated ( -ROTATION_ANGLE, 0.0, 0.0, 1.0 ) ; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
205 break ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
206 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
207 case GLUT_KEY_PAGE_UP : /* Zoom in a little */ |
|
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Franz Glasner <fzglas.hg@dom66.de>
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|
208 glScaled ( 1.0 / SCALE_FACTOR, 1.0 / SCALE_FACTOR, 1.0 / SCALE_FACTOR ) ; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
209 break ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
210 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
211 case GLUT_KEY_PAGE_DOWN : /* Zoom out a little */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
212 glScaled ( SCALE_FACTOR, SCALE_FACTOR, SCALE_FACTOR ) ; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
213 break ; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
214 } |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
215 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
216 glutPostRedisplay () ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
217 } |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
218 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
219 void mouse_cb ( int button, int updown, int x, int y ) |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
220 { |
|
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parents:
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|
221 if ( updown == GLUT_DOWN ) |
|
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parents:
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|
222 { |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
223 /*double dist = 1.0e20 ; A very large number */ |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
224 /* The idea here is that we go into "pick" mode and pick the nearest point |
|
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parents:
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|
225 to the mouse click position. Unfortunately I don't have the time to implement |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
226 it at the moment. */ |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
227 } |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
228 } |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff
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|
229 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
230 void draw_curve ( int index, double position [ NUM_POINTS ][3] ) |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
231 { |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
232 int i = index ; |
|
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parents:
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|
233 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
234 glBegin ( GL_LINE_STRIP ) ; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
235 do |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
236 { |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
237 i = ( i == NUM_POINTS-1 ) ? 0 : i + 1 ; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
238 glVertex3dv ( position[i] ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
239 } |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
240 while ( i != index ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
241 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
242 glEnd () ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
243 } |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
244 |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
245 void bitmapPrintf (const char *fmt, ...) |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
246 { |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
247 static char buf[256]; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
248 va_list args; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
249 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
250 va_start(args, fmt); |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
251 #if defined(WIN32) && !defined(__CYGWIN__) |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
252 (void) _vsnprintf (buf, sizeof(buf), fmt, args); |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
253 #else |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
254 (void) vsnprintf (buf, sizeof(buf), fmt, args); |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
255 #endif |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
256 va_end(args); |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
257 glutBitmapString ( GLUT_BITMAP_HELVETICA_12, (unsigned char*)buf ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
258 } |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
259 |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
260 void display_cb ( void ) |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
261 { |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
262 glClear ( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
263 |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
264 glColor3d ( 1.0, 1.0, 1.0 ) ; /* White */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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265 /* Draw some axes */ |
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266 glBegin ( GL_LINES ) ; |
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267 glVertex3d ( 0.0, 0.0, 0.0 ) ; |
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268 glVertex3d ( 2.0, 0.0, 0.0 ) ; |
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269 glVertex3d ( 0.0, 0.0, 0.0 ) ; |
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270 glVertex3d ( 0.0, 1.0, 0.0 ) ; |
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271 glVertex3d ( 0.0, 0.0, 0.0 ) ; |
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272 glVertex3d ( 0.0, 0.0, 1.0 ) ; |
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273 glEnd () ; |
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274 |
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275 glColor3d ( 1.0, 0.0, 0.0 ) ; /* Red */ |
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276 draw_curve ( array_index, red_position ) ; |
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277 |
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278 glColor3d ( 0.0, 1.0, 0.0 ) ; /* Green */ |
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279 draw_curve ( array_index, grn_position ) ; |
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280 |
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281 /* Print the distance between the two points */ |
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282 glColor3d ( 1.0, 1.0, 1.0 ) ; /* White */ |
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283 glRasterPos2i ( 1, 1 ) ; |
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284 bitmapPrintf ( "Distance: %10.6f", distance ) ; |
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285 |
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286 glutSwapBuffers(); |
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287 } |
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288 |
|
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289 void reshape_cb ( int width, int height ) |
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290 { |
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291 float ar; |
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292 glViewport ( 0, 0, width, height ) ; |
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293 glMatrixMode ( GL_PROJECTION ) ; |
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294 glLoadIdentity () ; |
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295 ar = (float) width / (float) height ; |
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296 glFrustum ( -ar, ar, -1.0, 1.0, 10.0, 100.0 ) ; |
|
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297 glMatrixMode ( GL_MODELVIEW ) ; |
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298 glLoadIdentity () ; |
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299 xcen = 0.0 ; |
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|
300 ycen = 0.0 ; |
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|
301 zcen = 0.0 ; |
|
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302 glTranslated ( xcen, ycen, zcen - 50.0 ) ; |
|
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303 } |
|
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304 |
|
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|
305 |
|
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|
306 void timer_cb ( int value ) |
|
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|
307 { |
|
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parents:
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|
308 /* Function called at regular intervals to update the positions of the points */ |
|
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Franz Glasner <fzglas.hg@dom66.de>
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309 double deltax, deltay, deltaz ; |
|
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|
310 int new_index = array_index + 1 ; |
|
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311 |
|
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|
312 /* Set the next timed callback */ |
|
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|
313 glutTimerFunc ( 30, timer_cb, 0 ) ; |
|
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314 |
|
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|
315 if ( animate > 0 ) |
|
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|
316 { |
|
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parents:
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|
317 if ( new_index == NUM_POINTS ) new_index = 0 ; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
318 advance_in_time ( time_step, red_position[array_index], red_position[new_index] ) ; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
319 advance_in_time ( time_step, grn_position[array_index], grn_position[new_index] ) ; |
|
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|
320 array_index = new_index ; |
|
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parents:
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|
321 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
322 deltax = red_position[array_index][0] - grn_position[array_index][0] ; |
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parents:
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323 deltay = red_position[array_index][1] - grn_position[array_index][1] ; |
|
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parents:
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|
324 deltaz = red_position[array_index][2] - grn_position[array_index][2] ; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
325 distance = sqrt ( deltax * deltax + deltay * deltay + deltaz * deltaz ) ; |
|
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|
326 |
|
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parents:
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|
327 if ( animate == 2 ) animate = 0 ; |
|
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parents:
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|
328 } |
|
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parents:
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|
329 |
|
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parents:
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|
330 glutPostRedisplay () ; |
|
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parents:
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|
331 } |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
332 |
|
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parents:
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|
333 |
|
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parents:
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|
334 |
|
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parents:
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|
335 /* The Main Program */ |
|
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|
336 |
|
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parents:
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|
337 int main ( int argc, char *argv[] ) |
|
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parents:
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|
338 { |
|
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parents:
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|
339 int pargc = argc ; |
|
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parents:
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|
340 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
341 /* Initialize the random number generator */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
342 srand ( 1023 ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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343 |
|
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parents:
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|
344 /* Set up the OpenGL parameters */ |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
345 glEnable ( GL_DEPTH_TEST ) ; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
346 glClearColor ( 0.0, 0.0, 0.0, 0.0 ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
347 glClearDepth ( 1.0 ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
348 |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
349 /* Initialize GLUT */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
350 glutInitWindowSize ( 600, 600 ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
351 glutInit ( &pargc, argv ) ; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
352 glutInitDisplayMode ( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH ) ; |
|
b50eed0cc0ef
ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
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353 |
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354 /* Create the window */ |
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355 glutCreateWindow ( "Lorenz Attractor" ) ; |
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356 glutKeyboardFunc ( key_cb ) ; |
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357 glutMouseFunc ( mouse_cb ) ; |
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358 glutSpecialFunc ( special_cb ) ; |
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359 glutDisplayFunc ( display_cb ) ; |
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360 glutReshapeFunc ( reshape_cb ) ; |
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361 glutTimerFunc ( 30, timer_cb, 0 ) ; |
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362 |
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363 /* Initialize the attractor: The easiest way is to call the keyboard callback with an |
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364 * argument of 'r' for Reset. |
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365 */ |
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366 key_cb ( 'r', 0, 0 ) ; |
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367 |
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368 /* Enter the GLUT main loop */ |
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369 glutMainLoop () ; |
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370 |
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371 #ifdef _MSC_VER |
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372 /* DUMP MEMORY LEAK INFORMATION */ |
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373 _CrtDumpMemoryLeaks () ; |
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374 #endif |
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375 |
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376 return 0 ; |
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377 } |
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378 |
