390 lines
8.9 KiB
C
390 lines
8.9 KiB
C
/*
|
|
* 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;
|
|
}
|