/*
* 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;
int ShowNextGLFrame=0; // 0 = Off
// 1 = On
int FrameCount=0;
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;
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 );
}
void GLUTCALLBACK glut_post_redisplay_p(void)
{
if( ShowNextGLFrame == 1 ) {
glutPostRedisplay();
ShowNextGLFrame = 0;
FrameCount++;
printf("Frame Count=%d\n",FrameCount);
}
}
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) {
// This is where we change the background color: default=0.5,0.5,0.5,0
glClearColor(0.0, 1.0, 1.0, 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 13:
ShowNextGLFrame=1;
break;
case 27:
exit(1);
case 32:
ReInit();
break;
}
}
GLenum Args(int argc, char **argv)
{
GLint i;
rgb = GL_TRUE;
doubleBuffer = GL_FALSE;
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;
}
void main(int argc, char **argv)
{
GLenum type;
glutInit(&argc, argv);
if (Args(argc, argv) == GL_FALSE) {
exit(1);
}
glutInitWindowPosition(0, 0); glutInitWindowSize( 150, 150);
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();
}