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/ IRIX Patches 1995 June / SGI IRIX Patches 1995 Jun.iso / 5.3_patches / patchSG0000154 / patchSG0000154.idb / usr / share / src / OpenGL / samples / teapot.c.z / teapot.c
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C/C++ Source or Header  |  1995-06-12  |  7.1 KB  |  258 lines
  1. #include <stdio.h>
  2. #include <string.h>
  3. #include <stdlib.h>
  4. #include "tk.h"
  5.  
  6.  
  7. GLenum rgb, doubleBuffer, directRender;
  8.  
  9. float rotX = 0.0, rotY = 0.0;
  10. int teaList;
  11.  
  12. long patchData[][16] = {
  13.     {102,103,104,105,4,5,6,7,8,9,10,11,12,13,14,15},
  14.     {12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27},
  15.     {24,25,26,27,29,30,31,32,33,34,35,36,37,38,39,40},
  16.     {96,96,96,96,97,98,99,100,101,101,101,101,0,1,2,3,},
  17.     {0,1,2,3,106,107,108,109,110,111,112,113,114,115,116,117},
  18.     {118,118,118,118,124,122,119,121,123,126,125,120,40,39,38,37},
  19.     {41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56},
  20.     {53,54,55,56,57,58,59,60,61,62,63,64,28,65,66,67},
  21.     {68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83},
  22.     {80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95}
  23. };
  24.  
  25. float cpData[][3] = {
  26.     {0.2,0,2.7},{0.2,-0.112,2.7},{0.112,-0.2,2.7},{0,-0.2,2.7},
  27.     {1.3375,0,2.53125},{1.3375,-0.749,2.53125},{0.749,-1.3375,2.53125},
  28.     {0,-1.3375,2.53125},{1.4375,0,2.53125},{1.4375,-0.805,2.53125},
  29.     {0.805,-1.4375,2.53125},{0,-1.4375,2.53125},{1.5,0,2.4},{1.5,-0.84,2.4},
  30.     {0.84,-1.5,2.4},{0,-1.5,2.4},{1.75,0,1.875},{1.75,-0.98,1.875},
  31.     {0.98,-1.75,1.875},{0,-1.75,1.875},{2,0,1.35},{2,-1.12,1.35},
  32.     {1.12,-2,1.35},{0,-2,1.35},{2,0,0.9},{2,-1.12,0.9},{1.12,-2,0.9},
  33.     {0,-2,0.9},{-2,0,0.9},{2,0,0.45},{2,-1.12,0.45},{1.12,-2,0.45},
  34.     {0,-2,0.45},{1.5,0,0.225},{1.5,-0.84,0.225},{0.84,-1.5,0.225},
  35.     {0,-1.5,0.225},{1.5,0,0.15},{1.5,-0.84,0.15},{0.84,-1.5,0.15},
  36.     {0,-1.5,0.15},{-1.6,0,2.025},{-1.6,-0.3,2.025},{-1.5,-0.3,2.25},
  37.     {-1.5,0,2.25},{-2.3,0,2.025},{-2.3,-0.3,2.025},{-2.5,-0.3,2.25},
  38.     {-2.5,0,2.25},{-2.7,0,2.025},{-2.7,-0.3,2.025},{-3,-0.3,2.25},
  39.     {-3,0,2.25},{-2.7,0,1.8},{-2.7,-0.3,1.8},{-3,-0.3,1.8},{-3,0,1.8},
  40.     {-2.7,0,1.575},{-2.7,-0.3,1.575},{-3,-0.3,1.35},{-3,0,1.35},
  41.     {-2.5,0,1.125},{-2.5,-0.3,1.125},{-2.65,-0.3,0.9375},{-2.65,0,0.9375},
  42.     {-2,-0.3,0.9},{-1.9,-0.3,0.6},{-1.9,0,0.6},{1.7,0,1.425},
  43.     {1.7,-0.66,1.425},{1.7,-0.66,0.6},{1.7,0,0.6},{2.6,0,1.425},
  44.     {2.6,-0.66,1.425},{3.1,-0.66,0.825},{3.1,0,0.825},{2.3,0,2.1},
  45.     {2.3,-0.25,2.1},{2.4,-0.25,2.025},{2.4,0,2.025},{2.7,0,2.4},
  46.     {2.7,-0.25,2.4},{3.3,-0.25,2.4},{3.3,0,2.4},{2.8,0,2.475},
  47.     {2.8,-0.25,2.475},{3.525,-0.25,2.49375},{3.525,0,2.49375},
  48.     {2.9,0,2.475},{2.9,-0.15,2.475},{3.45,-0.15,2.5125},{3.45,0,2.5125},
  49.     {2.8,0,2.4},{2.8,-0.15,2.4},{3.2,-0.15,2.4},{3.2,0,2.4},{0,0,3.15},
  50.     {0.8,0,3.15},{0.8,-0.45,3.15},{0.45,-0.8,3.15},{0,-0.8,3.15},
  51.     {0,0,2.85},{1.4,0,2.4},{1.4,-0.784,2.4},{0.784,-1.4,2.4},{0,-1.4,2.4},
  52.     {0.4,0,2.55},{0.4,-0.224,2.55},{0.224,-0.4,2.55},{0,-0.4,2.55},
  53.     {1.3,0,2.55},{1.3,-0.728,2.55},{0.728,-1.3,2.55},{0,-1.3,2.55},
  54.     {1.3,0,2.4},{1.3,-0.728,2.4},{0.728,-1.3,2.4},{0,-1.3,2.4},{0,0,0},
  55.     {1.425,-0.798,0},{1.5,0,0.075},{1.425,0,0},{0.798,-1.425,0},
  56.     {0,-1.5,0.075},{0,-1.425,0},{1.5,-0.84,0.075},{0.84,-1.5,0.075}
  57. };
  58.  
  59.  
  60. void Teapot(long grid)
  61. {
  62.     float p[4][4][3], q[4][4][3], r[4][4][3], s[4][4][3];
  63.     long i, j, k, l;
  64.  
  65.     teaList = 1;
  66.     glNewList(teaList, GL_COMPILE);
  67.     glPushMatrix();
  68.     glRotatef(270.0, 1.0, 0.0, 0.0);
  69.     for (i = 0; i < 10; i++) {
  70.     for (j = 0; j < 4; j++) {
  71.         for (k = 0; k < 4; k++) {
  72.         for (l = 0; l < 3; l++) {
  73.             p[j][k][l] = cpData[patchData[i][j*4+k]][l];
  74.             q[j][k][l] = cpData[patchData[i][j*4+(3-k)]][l];
  75.             if (l == 1) {
  76.             q[j][k][l] *= -1.0;
  77.             }
  78.             if (i < 6) {
  79.             r[j][k][l] = cpData[patchData[i][j*4+(3-k)]][l];
  80.             if (l == 0) {
  81.                 r[j][k][l] *= -1.0;
  82.             }
  83.             s[j][k][l] = cpData[patchData[i][j*4+k]][l];
  84.             if (l == 0) {
  85.                 s[j][k][l] *= -1.0;
  86.             }
  87.             if (l == 1) {
  88.                 s[j][k][l] *= -1.0;
  89.             }
  90.             }
  91.         }
  92.         }
  93.     }
  94.     glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &p[0][0][0]);
  95.     glEnable(GL_MAP2_VERTEX_3);
  96.     glMapGrid2f(grid, 0.0, 1.0, grid, 0.0, 1.0);
  97.     glEvalMesh2(GL_FILL, 0, grid, 0, grid);
  98.     glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &q[0][0][0]);
  99.     glEvalMesh2(GL_FILL, 0, grid, 0, grid);
  100.     if (i < 6) {
  101.         glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &r[0][0][0]);
  102.         glEvalMesh2(GL_FILL, 0, grid, 0, grid);
  103.         glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &s[0][0][0]);
  104.         glEvalMesh2(GL_FILL, 0, grid, 0, grid);
  105.     }
  106.     }
  107.     glDisable(GL_MAP2_VERTEX_3);
  108.     glPopMatrix();
  109.     glEndList();
  110. }
  111.  
  112. static void Init(void)
  113. {
  114.     float position[] = {0.0, 3.0, 3.0, 0.0};
  115.     float local_view[] = {0.0};
  116.     float ambient[] = {0.1745, 0.01175, 0.01175};
  117.     float diffuse[] = {0.61424, 0.04136, 0.04136};
  118.     float specular[] = {0.727811, 0.626959, 0.626959};
  119.  
  120.     glEnable(GL_DEPTH_TEST);
  121.     glDepthFunc(GL_LESS);
  122.  
  123.     glLightfv(GL_LIGHT0, GL_POSITION, position);
  124.     glLightModelfv(GL_LIGHT_MODEL_LOCAL_VIEWER, local_view);
  125.  
  126.     glFrontFace(GL_CW);
  127.     glEnable(GL_LIGHTING);
  128.     glEnable(GL_LIGHT0);
  129.     glEnable(GL_AUTO_NORMAL);
  130.     glEnable(GL_NORMALIZE);
  131.  
  132.     glMaterialfv(GL_FRONT, GL_AMBIENT, ambient);
  133.     glMaterialfv(GL_FRONT, GL_DIFFUSE, diffuse);
  134.     glMaterialfv(GL_FRONT, GL_SPECULAR, specular);
  135.     glMaterialf(GL_FRONT, GL_SHININESS, 0.6*128.0);
  136.  
  137.     glClearColor(0.5, 0.5, 0.5, 1.0);
  138.     glColor3f(1.0, 1.0, 1.0);
  139.  
  140.     Teapot(14);
  141. }
  142.  
  143. static void Reshape(int w, int h)
  144. {
  145.  
  146.     glViewport(0, 0, (GLint)w, (GLint)h);
  147.  
  148.     glMatrixMode(GL_PROJECTION);
  149.     glLoadIdentity();
  150.     glOrtho(-6.0, 6.0, -6.0, 6.0, -1.0, 10.0);
  151.     glMatrixMode(GL_MODELVIEW);
  152.     glLoadIdentity();
  153. }
  154.  
  155. static GLenum Key(int key, GLenum mask)
  156. {
  157.  
  158.     switch (key) {
  159.       case TK_ESCAPE:
  160.     tkQuit();
  161.       case TK_UP:
  162.     rotX -= 20.0;
  163.     break;
  164.       case TK_DOWN:
  165.     rotX += 20.0;
  166.     break;
  167.       case TK_LEFT:
  168.     rotY -= 20.0;
  169.     break;
  170.       case TK_RIGHT:
  171.     rotY += 20.0;
  172.     break;
  173.       default:
  174.     return GL_FALSE;
  175.     }
  176.     return GL_TRUE;
  177. }
  178.  
  179. static void Draw(void)
  180. {
  181.  
  182.     glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
  183.  
  184.     glPushMatrix();
  185.  
  186.     glTranslatef(0.0, 0.0, -5.0);
  187.     glRotatef(rotY, 0.0,1.0,0.0);
  188.     glRotatef(rotX, 1.0,0.0,0.0);
  189.  
  190.     glCallList(teaList);
  191.  
  192.     glPopMatrix();
  193.  
  194.     glFlush();
  195.  
  196.     if (doubleBuffer) {
  197.     tkSwapBuffers();
  198.     }
  199. }
  200.  
  201. static GLenum Args(int argc, char **argv)
  202. {
  203.     GLint i;
  204.  
  205.     rgb = GL_TRUE;
  206.     doubleBuffer = GL_FALSE;
  207.     directRender = GL_TRUE;
  208.  
  209.     for (i = 1; i < argc; i++) {
  210.     if (strcmp(argv[i], "-ci") == 0) {
  211.         rgb = GL_FALSE;
  212.     } else if (strcmp(argv[i], "-rgb") == 0) {
  213.         rgb = GL_TRUE;
  214.     } else if (strcmp(argv[i], "-sb") == 0) {
  215.         doubleBuffer = GL_FALSE;
  216.     } else if (strcmp(argv[i], "-db") == 0) {
  217.         doubleBuffer = GL_TRUE;
  218.     } else if (strcmp(argv[i], "-dr") == 0) {
  219.         directRender = GL_TRUE;
  220.     } else if (strcmp(argv[i], "-ir") == 0) {
  221.         directRender = GL_FALSE;
  222.     } else {
  223.         printf("%s (Bad option).\n", argv[i]);
  224.         return GL_FALSE;
  225.     }
  226.     }
  227.     return GL_TRUE;
  228. }
  229.  
  230. void main(int argc, char **argv)
  231. {
  232.     GLenum type;
  233.  
  234.     if (Args(argc, argv) == GL_FALSE) {
  235.     tkQuit();
  236.     }
  237.  
  238.     tkInitPosition(0, 0, 300, 300);
  239.  
  240.     type = TK_DEPTH;
  241.     type |= (rgb) ? TK_RGB : TK_INDEX;
  242.     type |= (doubleBuffer) ? TK_DOUBLE : TK_SINGLE;
  243.     type |= (directRender) ? TK_DIRECT : TK_INDIRECT;
  244.     tkInitDisplayMode(type);
  245.  
  246.     if (tkInitWindow("TeaPot") == GL_FALSE) {
  247.     tkQuit();
  248.     }
  249.  
  250.     Init();
  251.  
  252.     tkExposeFunc(Reshape);
  253.     tkReshapeFunc(Reshape);
  254.     tkKeyDownFunc(Key);
  255.     tkDisplayFunc(Draw);
  256.     tkExec();
  257. }
  258.