/* * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc. * * Permission to use, copy, modify, distribute, and sell this software and * its documentation for any purpose is hereby granted without fee, provided * that (i) the above copyright notices and this permission notice appear in * all copies of the software and related documentation, and (ii) the name of * Silicon Graphics may not be used in any advertising or * publicity relating to the software without the specific, prior written * permission of Silicon Graphics. * * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF * ANY KIND, * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. * * IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE * OF THIS SOFTWARE. */ /* * Nov 20, 1995 use stdlib's rand()/srand() instead of random()/srand48(), etc. */ /* * Modified by Li Wei(liwei@aiar.xjtu.edu.cn) to be able to run in Windows * 6/13 * * Modified by Brian Paul to compile with Windows OR Unix. 7/23/97 */ #define _HPUX_SOURCE #include <stdio.h> #include <stdlib.h> #include <string.h> #include <math.h> #include <GL/glut.h> #ifndef RAND_MAX # define RAND_MAX 32767 #endif #define XSIZE 100 #define YSIZE 75 #define RINGS 5 #define BLUERING 0 #define BLACKRING 1 #define REDRING 2 #define YELLOWRING 3 #define GREENRING 4 #define BACKGROUND 8 GLenum rgb, doubleBuffer; #include "tkmap.c" unsigned char rgb_colors[RINGS][3]; int mapped_colors[RINGS]; float dests[RINGS][3]; float offsets[RINGS][3]; float angs[RINGS]; float rotAxis[RINGS][3]; int iters[RINGS]; GLuint theTorus; void FillTorus(float rc, int numc, float rt, int numt) { int i, j, k; double s, t; double x, y, z; double pi, twopi; pi = 3.14159265358979323846; twopi = 2 * pi; for (i = 0; i < numc; i++) { glBegin(GL_QUAD_STRIP); for (j = 0; j <= numt; j++) { for (k = 1; k >= 0; k--) { s = (i + k) % numc + 0.5; t = j % numt; x = cos(t*twopi/numt) * cos(s*twopi/numc); y = sin(t*twopi/numt) * cos(s*twopi/numc); z = sin(s*twopi/numc); glNormal3f(x, y, z); x = (rt + rc * cos(s*twopi/numc)) * cos(t*twopi/numt); y = (rt + rc * cos(s*twopi/numc)) * sin(t*twopi/numt); z = rc * sin(s*twopi/numc); glVertex3f(x, y, z); } } glEnd(); } } float Clamp(int iters_left, float t) { if (iters_left < 3) { return 0.0; } return (iters_left-2)*t/iters_left; } void DrawScene(void) { int i, j; GLboolean goIdle; static double t0 = -1.; double t, dt; t = glutGet(GLUT_ELAPSED_TIME) / 1000.; if (t0 < 0.) t0 = t; dt = t - t0; if (dt < 1./30.) return; t0 = t; goIdle = GL_TRUE; for (i = 0; i < RINGS; i++) { if (iters[i]) { for (j = 0; j < 3; j++) { offsets[i][j] = Clamp(iters[i], offsets[i][j]); } angs[i] = Clamp(iters[i], angs[i]); iters[i]--; goIdle = GL_FALSE; } } if (goIdle) { glutIdleFunc(NULL); } glPushMatrix(); glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); gluLookAt(0,0,10, 0,0,0, 0,1,0); for (i = 0; i < RINGS; i++) { if (rgb) { glColor3ubv(rgb_colors[i]); } else { glIndexi(mapped_colors[i]); } glPushMatrix(); glTranslatef(dests[i][0]+offsets[i][0], dests[i][1]+offsets[i][1], dests[i][2]+offsets[i][2]); glRotatef(angs[i], rotAxis[i][0], rotAxis[i][1], rotAxis[i][2]); glCallList(theTorus); glPopMatrix(); } glPopMatrix(); glFlush(); if (doubleBuffer) { glutSwapBuffers(); } } float MyRand(void) { return 10.0 * ( (float) rand() / (float) RAND_MAX - 0.5 ); } #if !defined(GLUTCALLBACK) #define GLUTCALLBACK #endif void GLUTCALLBACK glut_post_redisplay_p(void) { glutPostRedisplay(); } void ReInit(void) { int i; float deviation; deviation = MyRand() / 2; deviation = deviation * deviation; for (i = 0; i < RINGS; i++) { offsets[i][0] = MyRand(); offsets[i][1] = MyRand(); offsets[i][2] = MyRand(); angs[i] = 260.0 * MyRand(); rotAxis[i][0] = MyRand(); rotAxis[i][1] = MyRand(); rotAxis[i][2] = MyRand(); iters[i] = (deviation * MyRand() + 60.0); } glutIdleFunc(glut_post_redisplay_p); } void Init(void) { float base, height; float aspect, x, y; int i; float top_y = 1.0; float bottom_y = 0.0; float top_z = 0.15; float bottom_z = 0.69; float spacing = 2.5; static float lmodel_ambient[] = {0.0, 0.0, 0.0, 0.0}; static float lmodel_twoside[] = {GL_FALSE}; static float lmodel_local[] = {GL_FALSE}; static float light0_ambient[] = {0.1, 0.1, 0.1, 1.0}; static float light0_diffuse[] = {1.0, 1.0, 1.0, 0.0}; static float light0_position[] = {0.8660254, 0.5, 1, 0}; static float light0_specular[] = {1.0, 1.0, 1.0, 0.0}; static float bevel_mat_ambient[] = {0.0, 0.0, 0.0, 1.0}; static float bevel_mat_shininess[] = {40.0}; static float bevel_mat_specular[] = {1.0, 1.0, 1.0, 0.0}; static float bevel_mat_diffuse[] = {1.0, 0.0, 0.0, 0.0}; srand( (unsigned int) glutGet(GLUT_ELAPSED_TIME) ); ReInit(); for (i = 0; i < RINGS; i++) { rgb_colors[i][0] = rgb_colors[i][1] = rgb_colors[i][2] = 0; } rgb_colors[BLUERING][2] = 255; rgb_colors[REDRING][0] = 255; rgb_colors[GREENRING][1] = 255; rgb_colors[YELLOWRING][0] = 255; rgb_colors[YELLOWRING][1] = 255; mapped_colors[BLUERING] = COLOR_BLUE; mapped_colors[REDRING] = COLOR_RED; mapped_colors[GREENRING] = COLOR_GREEN; mapped_colors[YELLOWRING] = COLOR_YELLOW; mapped_colors[BLACKRING] = COLOR_BLACK; dests[BLUERING][0] = -spacing; dests[BLUERING][1] = top_y; dests[BLUERING][2] = top_z; dests[BLACKRING][0] = 0.0; dests[BLACKRING][1] = top_y; dests[BLACKRING][2] = top_z; dests[REDRING][0] = spacing; dests[REDRING][1] = top_y; dests[REDRING][2] = top_z; dests[YELLOWRING][0] = -spacing / 2.0; dests[YELLOWRING][1] = bottom_y; dests[YELLOWRING][2] = bottom_z; dests[GREENRING][0] = spacing / 2.0; dests[GREENRING][1] = bottom_y; dests[GREENRING][2] = bottom_z; base = 2.0; height = 2.0; theTorus = glGenLists(1); glNewList(theTorus, GL_COMPILE); FillTorus(0.1, 8, 1.0, 25); glEndList(); x = (float)XSIZE; y = (float)YSIZE; aspect = x / y; glEnable(GL_CULL_FACE); glCullFace(GL_BACK); glEnable(GL_DEPTH_TEST); glClearDepth(1.0); if (rgb) { glClearColor(0.5, 0.5, 0.5, 0.0); glLightfv(GL_LIGHT0, GL_AMBIENT, light0_ambient); glLightfv(GL_LIGHT0, GL_DIFFUSE, light0_diffuse); glLightfv(GL_LIGHT0, GL_SPECULAR, light0_specular); glLightfv(GL_LIGHT0, GL_POSITION, light0_position); glEnable(GL_LIGHT0); glLightModelfv(GL_LIGHT_MODEL_LOCAL_VIEWER, lmodel_local); glLightModelfv(GL_LIGHT_MODEL_TWO_SIDE, lmodel_twoside); glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient); glEnable(GL_LIGHTING); glMaterialfv(GL_FRONT, GL_AMBIENT, bevel_mat_ambient); glMaterialfv(GL_FRONT, GL_SHININESS, bevel_mat_shininess); glMaterialfv(GL_FRONT, GL_SPECULAR, bevel_mat_specular); glMaterialfv(GL_FRONT, GL_DIFFUSE, bevel_mat_diffuse); glColorMaterial(GL_FRONT_AND_BACK, GL_DIFFUSE); glEnable(GL_COLOR_MATERIAL); glShadeModel(GL_SMOOTH); } else { glClearIndex(BACKGROUND); glShadeModel(GL_FLAT); } glMatrixMode(GL_PROJECTION); gluPerspective(45, 1.33, 0.1, 100.0); glMatrixMode(GL_MODELVIEW); } void Reshape(int width, int height) { glViewport(0, 0, width, height); } void Key(unsigned char key, int x, int y) { switch (key) { case 27: exit(1); case 32: ReInit(); break; } } GLenum Args(int argc, char **argv) { GLint i; rgb = GL_TRUE; doubleBuffer = GL_TRUE; for (i = 1; i < argc; i++) { if (strcmp(argv[i], "-ci") == 0) { rgb = GL_FALSE; } else if (strcmp(argv[i], "-rgb") == 0) { rgb = GL_TRUE; } else if (strcmp(argv[i], "-sb") == 0) { doubleBuffer = GL_FALSE; } else if (strcmp(argv[i], "-db") == 0) { doubleBuffer = GL_TRUE; } else { printf("%s (Bad option).\n", argv[i]); return GL_FALSE; } } return GL_TRUE; } int main(int argc, char **argv) { GLenum type; glutInit(&argc, argv); if (Args(argc, argv) == GL_FALSE) { exit(1); } glutInitWindowPosition(0, 0); glutInitWindowSize( 400, 300); type = GLUT_DEPTH; type |= (rgb) ? GLUT_RGB : GLUT_INDEX; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); if (glutCreateWindow("Olympic") == GL_FALSE) { exit(1); } InitMap(); Init(); glutReshapeFunc(Reshape); glutKeyboardFunc(Key); glutDisplayFunc(DrawScene); glutIdleFunc(glut_post_redisplay_p); glutMainLoop(); return 0; }