Initial revision

1 files changed, 375 insertions, 0 deletions

diff --git a/progs/samples/olympic.c b/progs/samples/olympic.c
new file mode 100644
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+++ b/progs/samples/olympic.c
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+/*
+ * 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([email protected]) 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;
+
+    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)
+{
+      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_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;
+}
+
+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;
+}