| /* |
| * 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; |
| } |