+++ /dev/null
-/*
- * 3-D gear wheels. This program is in the public domain.
- *
- * Command line options:
- * -info print GL implementation information
- * -exit automatically exit after 30 seconds
- *
- *
- * Brian Paul
- */
-
-/* Conversion to GLUT by Mark J. Kilgard */
-
-
-
-#include <math.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <GL/glut.h>
-
-#ifndef M_PI
-#define M_PI 3.14159265
-#endif
-
-static GLint T0 = 0;
-static GLint Frames = 0;
-static GLint autoexit = 0;
-static GLint win = 0;
-static GLboolean Visible = GL_TRUE;
-static GLboolean Animate = GL_TRUE;
-static GLfloat viewDist = 40.0;
-
-
-/**
-
- Draw a gear wheel. You'll probably want to call this function when
- building a display list since we do a lot of trig here.
-
- Input: inner_radius - radius of hole at center
- outer_radius - radius at center of teeth
- width - width of gear
- teeth - number of teeth
- tooth_depth - depth of tooth
-
- **/
-
-static void
-gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
- GLint teeth, GLfloat tooth_depth)
-{
- GLint i;
- GLfloat r0, r1, r2;
- GLfloat angle, da;
- GLfloat u, v, len;
-
- r0 = inner_radius;
- r1 = outer_radius - tooth_depth / 2.0;
- r2 = outer_radius + tooth_depth / 2.0;
-
- da = 2.0 * M_PI / teeth / 4.0;
-
- glShadeModel(GL_FLAT);
-
- glNormal3f(0.0, 0.0, 1.0);
-
- /* draw front face */
- glBegin(GL_QUAD_STRIP);
- for (i = 0; i <= teeth; i++) {
- angle = i * 2.0 * M_PI / teeth;
- glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
- glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
- if (i < teeth) {
- glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
- glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5);
- }
- }
- glEnd();
-
- /* draw front sides of teeth */
- glBegin(GL_QUADS);
- da = 2.0 * M_PI / teeth / 4.0;
- for (i = 0; i < teeth; i++) {
- angle = i * 2.0 * M_PI / teeth;
-
- glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
- glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
- glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), width * 0.5);
- glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5);
- }
- glEnd();
-
- glNormal3f(0.0, 0.0, -1.0);
-
- /* draw back face */
- glBegin(GL_QUAD_STRIP);
- for (i = 0; i <= teeth; i++) {
- angle = i * 2.0 * M_PI / teeth;
- glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
- glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
- if (i < teeth) {
- glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5);
- glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
- }
- }
- glEnd();
-
- /* draw back sides of teeth */
- glBegin(GL_QUADS);
- da = 2.0 * M_PI / teeth / 4.0;
- for (i = 0; i < teeth; i++) {
- angle = i * 2.0 * M_PI / teeth;
-
- glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5);
- glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -width * 0.5);
- glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
- glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
- }
- glEnd();
-
- /* draw outward faces of teeth */
- glBegin(GL_QUAD_STRIP);
- for (i = 0; i < teeth; i++) {
- angle = i * 2.0 * M_PI / teeth;
-
- glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
- glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
- u = r2 * cos(angle + da) - r1 * cos(angle);
- v = r2 * sin(angle + da) - r1 * sin(angle);
- len = sqrt(u * u + v * v);
- u /= len;
- v /= len;
- glNormal3f(v, -u, 0.0);
- glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
- glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
- glNormal3f(cos(angle), sin(angle), 0.0);
- glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), width * 0.5);
- glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -width * 0.5);
- u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
- v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
- glNormal3f(v, -u, 0.0);
- glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5);
- glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5);
- glNormal3f(cos(angle), sin(angle), 0.0);
- }
-
- glVertex3f(r1 * cos(0), r1 * sin(0), width * 0.5);
- glVertex3f(r1 * cos(0), r1 * sin(0), -width * 0.5);
-
- glEnd();
-
- glShadeModel(GL_SMOOTH);
-
- /* draw inside radius cylinder */
- glBegin(GL_QUAD_STRIP);
- for (i = 0; i <= teeth; i++) {
- angle = i * 2.0 * M_PI / teeth;
- glNormal3f(-cos(angle), -sin(angle), 0.0);
- glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
- glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
- }
- glEnd();
-
-}
-
-static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
-static GLint gear1, gear2, gear3;
-static GLfloat angle = 0.0;
-
-static void
-cleanup(void)
-{
- glDeleteLists(gear1, 1);
- glDeleteLists(gear2, 1);
- glDeleteLists(gear3, 1);
- glutDestroyWindow(win);
-}
-
-static void
-draw(void)
-{
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- glPushMatrix();
-
- glTranslatef(0.0, 0.0, -viewDist);
-
- glRotatef(view_rotx, 1.0, 0.0, 0.0);
- glRotatef(view_roty, 0.0, 1.0, 0.0);
- glRotatef(view_rotz, 0.0, 0.0, 1.0);
-
- glPushMatrix();
- glTranslatef(-3.0, -2.0, 0.0);
- glRotatef(angle, 0.0, 0.0, 1.0);
- glCallList(gear1);
- glPopMatrix();
-
- glPushMatrix();
- glTranslatef(3.1, -2.0, 0.0);
- glRotatef(-2.0 * angle - 9.0, 0.0, 0.0, 1.0);
- glCallList(gear2);
- glPopMatrix();
-
- glPushMatrix();
- glTranslatef(-3.1, 4.2, 0.0);
- glRotatef(-2.0 * angle - 25.0, 0.0, 0.0, 1.0);
- glCallList(gear3);
- glPopMatrix();
-
- glPopMatrix();
-
- glutSwapBuffers();
-
- Frames++;
-
- {
- GLint t = glutGet(GLUT_ELAPSED_TIME);
- if (t - T0 >= 5000) {
- GLfloat seconds = (t - T0) / 1000.0;
- GLfloat fps = Frames / seconds;
- printf("%d frames in %6.3f seconds = %6.3f FPS\n", Frames, seconds, fps);
- fflush(stdout);
- T0 = t;
- Frames = 0;
- if ((t >= 999.0 * autoexit) && (autoexit)) {
- cleanup();
- exit(0);
- }
- }
- }
-}
-
-
-static void
-idle(void)
-{
- static double t0 = -1.;
- double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
- if (t0 < 0.0)
- t0 = t;
- dt = t - t0;
- t0 = t;
-
- angle += 70.0 * dt; /* 70 degrees per second */
- angle = fmod(angle, 360.0); /* prevents eventual overflow */
-
- glutPostRedisplay();
-}
-
-static void
-update_idle_func(void)
-{
- if (Visible && Animate)
- glutIdleFunc(idle);
- else
- glutIdleFunc(NULL);
-}
-
-/* change view angle, exit upon ESC */
-/* ARGSUSED1 */
-static void
-key(unsigned char k, int x, int y)
-{
- switch (k) {
- case 'z':
- view_rotz += 5.0;
- break;
- case 'Z':
- view_rotz -= 5.0;
- break;
- case 'd':
- viewDist += 1.0;
- break;
- case 'D':
- viewDist -= 1.0;
- break;
- case 'a':
- Animate = !Animate;
- update_idle_func();
- break;
- case 27: /* Escape */
- cleanup();
- exit(0);
- break;
- default:
- return;
- }
- glutPostRedisplay();
-}
-
-/* change view angle */
-/* ARGSUSED1 */
-static void
-special(int k, int x, int y)
-{
- switch (k) {
- case GLUT_KEY_UP:
- view_rotx += 5.0;
- break;
- case GLUT_KEY_DOWN:
- view_rotx -= 5.0;
- break;
- case GLUT_KEY_LEFT:
- view_roty += 5.0;
- break;
- case GLUT_KEY_RIGHT:
- view_roty -= 5.0;
- break;
- default:
- return;
- }
- glutPostRedisplay();
-}
-
-/* new window size or exposure */
-static void
-reshape(int width, int height)
-{
- GLfloat h = (GLfloat) height / (GLfloat) width;
-
- glViewport(0, 0, (GLint) width, (GLint) height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glFrustum(-1.0, 1.0, -h, h, 5.0, 200.0);
- glMatrixMode(GL_MODELVIEW);
-}
-
-static void
-init(int argc, char *argv[])
-{
- static GLfloat pos[4] = {5.0, 5.0, 10.0, 0.0};
- static GLfloat red[4] = {0.8, 0.1, 0.0, 1.0};
- static GLfloat green[4] = {0.0, 0.8, 0.2, 1.0};
- static GLfloat blue[4] = {0.2, 0.2, 1.0, 1.0};
- GLint i;
-
- glLightfv(GL_LIGHT0, GL_POSITION, pos);
- glEnable(GL_CULL_FACE);
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
- glEnable(GL_DEPTH_TEST);
-
- /* make the gears */
- gear1 = glGenLists(1);
- glNewList(gear1, GL_COMPILE);
- glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
- gear(1.0, 4.0, 1.0, 20, 0.7);
- glEndList();
-
- gear2 = glGenLists(1);
- glNewList(gear2, GL_COMPILE);
- glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
- gear(0.5, 2.0, 2.0, 10, 0.7);
- glEndList();
-
- gear3 = glGenLists(1);
- glNewList(gear3, GL_COMPILE);
- glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
- gear(1.3, 2.0, 0.5, 10, 0.7);
- glEndList();
-
- glEnable(GL_NORMALIZE);
-
- for ( i=1; i<argc; i++ ) {
- if (strcmp(argv[i], "-info")==0) {
- printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
- printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
- printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
- printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
- }
- else if ( strcmp(argv[i], "-exit")==0) {
- autoexit = 30;
- printf("Auto Exit after %i seconds.\n", autoexit );
- }
- }
-}
-
-
-static void
-visible(int vis)
-{
- Visible = vis;
- update_idle_func();
-}
-
-int main(int argc, char *argv[])
-{
- glutInitWindowSize(300, 300);
- glutInit(&argc, argv);
- glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
- win = glutCreateWindow("Gears");
- init(argc, argv);
-
- glutDisplayFunc(draw);
- glutReshapeFunc(reshape);
- glutKeyboardFunc(key);
- glutSpecialFunc(special);
- glutVisibilityFunc(visible);
- update_idle_func();
-
- glutMainLoop();
- return 0; /* ANSI C requires main to return int. */
-}
projects / mesa.git / blobdiff