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Diffstat (limited to 'demos/natives/x11/olympic.c')
| -rw-r--r-- | demos/natives/x11/olympic.c | 409 |
1 files changed, 409 insertions, 0 deletions
diff --git a/demos/natives/x11/olympic.c b/demos/natives/x11/olympic.c new file mode 100644 index 0000000..0527d58 --- /dev/null +++ b/demos/natives/x11/olympic.c @@ -0,0 +1,409 @@ +
+/* Copyright (c) Mark J. Kilgard, 1994. */
+
+/**
+ * (c) Copyright 1993, 1994, Silicon Graphics, Inc.
+ * ALL RIGHTS RESERVED
+ * Permission to use, copy, modify, and distribute this software for
+ * any purpose and without fee is hereby granted, provided that the above
+ * copyright notice appear in all copies and that both the copyright notice
+ * and this permission notice appear in supporting documentation, and that
+ * the name of Silicon Graphics, Inc. not be used in advertising
+ * or publicity pertaining to distribution of the software without specific,
+ * written prior permission.
+ *
+ * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "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, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
+ * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
+ * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
+ * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
+ * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
+ * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
+ * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * US Government Users Restricted Rights
+ * Use, duplication, or disclosure by the Government is subject to
+ * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
+ * (c)(1)(ii) of the Rights in Technical Data and Computer Software
+ * clause at DFARS 252.227-7013 and/or in similar or successor
+ * clauses in the FAR or the DOD or NASA FAR Supplement.
+ * Unpublished-- rights reserved under the copyright laws of the
+ * United States. Contractor/manufacturer is Silicon Graphics,
+ * Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
+ *
+ * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <GL/glut.h>
+
+/* Some <math.h> files do not define M_PI... */
+#ifndef M_PI
+#define M_PI 3.141592654
+#endif
+
+extern double drand48(void);
+extern void srand48(long seedval);
+
+#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
+
+enum {
+ BLACK = 0,
+ RED,
+ GREEN,
+ YELLOW,
+ BLUE,
+ MAGENTA,
+ CYAN,
+ WHITE
+};
+
+typedef short Point[2];
+
+GLenum rgb, doubleBuffer, directRender;
+
+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 = M_PI;
+ 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
+Idle(void)
+{
+ int i, j;
+ int more = GL_FALSE;
+
+ 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]--;
+ more = GL_TRUE;
+ }
+ }
+ if (more) {
+ glutPostRedisplay();
+ } else {
+ glutIdleFunc(NULL);
+ }
+}
+
+void
+DrawScene(void)
+{
+ int i;
+
+ 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();
+ if (doubleBuffer) {
+ glutSwapBuffers();
+ } else {
+ glFlush();
+ }
+}
+
+float
+MyRand(void)
+{
+ return 10.0 * (drand48() - 0.5);
+}
+
+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);
+ }
+}
+
+void
+Init(void)
+{
+ 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};
+
+ srand48(0x102342);
+ 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] = BLUE;
+ mapped_colors[REDRING] = RED;
+ mapped_colors[GREENRING] = GREEN;
+ mapped_colors[YELLOWRING] = YELLOW;
+ mapped_colors[BLACKRING] = 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;
+
+ theTorus = glGenLists(1);
+ glNewList(theTorus, GL_COMPILE);
+ FillTorus(0.1, 8, 1.0, 25);
+ glEndList();
+
+ 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);
+}
+
+/* ARGSUSED1 */
+void
+Key(unsigned char key, int x, int y)
+{
+
+ switch (key) {
+ case 27:
+ exit(0);
+ break;
+ case ' ':
+ ReInit();
+ glutIdleFunc(Idle);
+ 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;
+}
+
+void
+visible(int vis)
+{
+ if (vis == GLUT_VISIBLE) {
+ glutIdleFunc(Idle);
+ } else {
+ glutIdleFunc(NULL);
+ }
+}
+
+int
+main(int argc, char **argv)
+{
+ GLenum type;
+
+ glutInitWindowSize(400, 300);
+ glutInit(&argc, argv);
+ if (Args(argc, argv) == GL_FALSE) {
+ exit(1);
+ }
+ type = (rgb) ? GLUT_RGB : GLUT_INDEX;
+ type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
+ glutInitDisplayMode(type);
+
+ glutCreateWindow("Olympic");
+
+ Init();
+
+ glutReshapeFunc(Reshape);
+ glutKeyboardFunc(Key);
+ glutDisplayFunc(DrawScene);
+
+ glutVisibilityFunc(visible);
+
+ glutMainLoop();
+ return 0; /* ANSI C requires main to return int. */
+}
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