/* $Id: gears.c,v 3.0 1998/02/14 18:42:29 brianp Exp $ */
/*
* 3-D gear wheels. This program is in the public domain.
*
* Brian Paul
*/
#include <math.h>
#include <stdlib.h>
#include <GL/glut.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include "ModuleManipulateur.h"
#include "ModuleMenus.h"
#include "ModuleReshape.h"
#ifndef M_PI
#define M_PI 3.14159265F
#endif
static float cosF(double v) {
return((float) cos(v)) ;
}
static float sinF(double v) {
return((float) sin(v)) ;
}
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/2.0F;
r2 = outer_radius+tooth_depth/2.0F;
da = 2.0F*M_PI/teeth/4.0F;
glShadeModel(GL_FLAT);
glNormal3f(0.0,0.0,1.0);
glBegin(GL_QUAD_STRIP);
for ( i = 0 ; i <= teeth ; i++ ) {
angle = i * 2.0F*M_PI / teeth;
glVertex3f(r0*cosF(angle),r0*sinF(angle),width*0.5F);
glVertex3f(r1*cosF(angle),r1*sinF(angle),width*0.5F);
glVertex3f(r0*cosF(angle),r0*sinF(angle),width*0.5F);
glVertex3f(r1*cosF(angle+3*da),r1*sinF(angle+3*da),width*0.5F); }
glEnd();
glBegin(GL_QUADS);
da = 2.0F*M_PI/teeth/4.0F;
for ( i = 0 ; i < teeth ; i++ ) {
angle = i * 2.0F*M_PI / teeth;
glVertex3f(r1*cosF(angle),r1*sinF(angle),width*0.5F);
glVertex3f(r2*cosF(angle+da),r2*sinF(angle+da),width*0.5F);
glVertex3f(r2*cosF(angle+2*da),r2*sinF(angle+2*da),width*0.5F);
glVertex3f(r1*cosF(angle+3*da),r1*sinF(angle+3*da),width*0.5F); }
glEnd();
glNormal3f(0.0,0.0,-1.0);
glBegin(GL_QUAD_STRIP);
for ( i = 0 ; i <= teeth ; i++ ) {
angle = i * 2.0F*M_PI / teeth;
glVertex3f(r1*cosF(angle),r1*sinF(angle),-width*0.5F);
glVertex3f(r0*cosF(angle),r0*sinF(angle),-width*0.5F);
glVertex3f(r1*cosF(angle+3*da),r1*sinF(angle+3*da),-width*0.5F);
glVertex3f(r0*cosF(angle),r0*sinF(angle),-width*0.5F); }
glEnd();
glBegin(GL_QUADS);
da = 2.0F*M_PI/teeth/4.0F;
for (i=0;i<teeth;i++) {
angle = i * 2.0F*M_PI / teeth;
glVertex3f(r1*cosF(angle+3*da),r1*sinF(angle+3*da),-width*0.5F);
glVertex3f(r2*cosF(angle+2*da),r2*sinF(angle+2*da),-width*0.5F);
glVertex3f(r2*cosF(angle+da),r2*sinF(angle+da),-width*0.5F);
glVertex3f(r1*cosF(angle),r1*sinF(angle),-width*0.5F); }
glEnd();
glBegin(GL_QUAD_STRIP);
for ( i = 0 ; i < teeth ; i++ ) {
angle = i * 2.0F*M_PI / teeth;
glVertex3f(r1*cosF(angle),r1*sinF(angle),width*0.5F );
glVertex3f(r1*cosF(angle),r1*sinF(angle),-width*0.5F );
u = r2*cosF(angle+da) - r1*cosF(angle);
v = r2*sinF(angle+da) - r1*sinF(angle);
len =(float) sqrt(u*u + v*v);
u /= len;
v /= len;
glNormal3f(v,-u,0.0);
glVertex3f(r2*cosF(angle+da),r2*sinF(angle+da),width*0.5F);
glVertex3f(r2*cosF(angle+da),r2*sinF(angle+da),-width*0.5F);
glNormal3f(cosF(angle),sinF(angle),0.0 );
glVertex3f(r2*cosF(angle+2*da),r2*sinF(angle+2*da),width*0.5F);
glVertex3f( r2*cosF(angle+2*da),r2*sinF(angle+2*da),-width*0.5F);
u = r1*cosF(angle+3*da) - r2*cosF(angle+2*da);
v = r1*sinF(angle+3*da) - r2*sinF(angle+2*da);
glNormal3f(v,-u,0.0);
glVertex3f(r1*cosF(angle+3*da),r1*sinF(angle+3*da),width*0.5F);
glVertex3f(r1*cosF(angle+3*da),r1*sinF(angle+3*da),-width*0.5F);
glNormal3f(cosF(angle),sinF(angle),0.0); }
glVertex3f(r1*cosF(0),r1*sinF(0),width*0.5F);
glVertex3f(r1*cosF(0),r1*sinF(0),-width*0.5F);
glEnd();
glShadeModel(GL_SMOOTH);
glBegin(GL_QUAD_STRIP);
for ( i = 0 ; i <= teeth ; i++ ) {
angle = i * 2.0F*M_PI / teeth;
glNormal3f(-cosF(angle),-sinF(angle),0.0);
glVertex3f(r0*cosF(angle),r0*sinF(angle),-width*0.5F);
glVertex3f(r0*cosF(angle),r0*sinF(angle),width*0.5F); }
glEnd();
}
static GLint gear1 ;
static GLint gear2;
static GLint gear3;
static GLfloat angle = 0.0;
static GLfloat da = 2.0;
static GLuint limit;
void display(void) {
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glPushMatrix();
manipulateurSouris();
manipulateurClavier();
glPushMatrix();
glTranslatef(-3.0,-2.0,0.0);
glRotatef(angle,0.0,0.0,1.0);
glCallList(gear1);
glPopMatrix();
glPushMatrix();
glTranslatef(3.1F,-2.0F,0.0F);
glRotatef(-2.0F*angle-9.0F,0.0F,0.0F,1.0F);
glCallList(gear2);
glPopMatrix();
glPushMatrix();
glTranslatef(-3.1F,4.2F,0.0F);
glRotatef(-2.0F*angle-25.0F,0.0F,0.0F,1.0F);
glCallList(gear3);
glPopMatrix();
glPopMatrix();
glutSwapBuffers();
}
void idle(void) {
angle += da;
glutPostRedisplay() ;
}
void myinit(void) {
static GLfloat pos[4] = {5.0F,5.0F,10.0F,0.0F };
static GLfloat red[4] = {0.8F,0.1F,0.0F,1.0F };
static GLfloat green[4] = {0.0F,0.8F,0.2F,1.0F };
static GLfloat blue[4] = {0.2F,0.2F,1.0F,1.0F };
glLightfv(GL_LIGHT0,GL_POSITION,pos);
glEnable(GL_CULL_FACE);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);
gear1 = glGenLists(1);
glNewList(gear1,GL_COMPILE);
glMaterialfv(GL_FRONT,GL_AMBIENT_AND_DIFFUSE,red);
gear(1.0F,4.0F,1.0F,20,0.7F);
glEndList();
gear2 = glGenLists(1);
glNewList(gear2,GL_COMPILE);
glMaterialfv(GL_FRONT,GL_AMBIENT_AND_DIFFUSE,green);
gear(0.5F,2.0F,2.0F,10,0.7F);
glEndList();
gear3 = glGenLists(1);
glNewList(gear3,GL_COMPILE);
glMaterialfv(GL_FRONT,GL_AMBIENT_AND_DIFFUSE,blue);
gear(1.3F,2.0F,0.5F,10,0.7F);
glEndList();
glEnable(GL_AUTO_NORMAL);
glEnable(GL_NORMALIZE);
}
void key(unsigned char key,int x,int y) {
if ( keyManipulateur(key,x,y) )
glutPostRedisplay();
else
switch ( key ) {
case 32 : da *= -1 ;
glutPostRedisplay();
break; }
}
int main(int argc,char **argv) {
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_RGBA|GLUT_DEPTH|GLUT_DOUBLE);
glutInitWindowSize(300,300);
glutInitWindowPosition(50,50);
glutCreateWindow("Gears");
myinit();
creationMenuBasique();
setParametresFrustumBasique(-1.0F,1.0F,-1.0,1.0F,5.0F,60.0F,0.0F,0.0F,-40.0F);
setManipulateurDistance(40.0F);
glutReshapeFunc(reshapeFrustumBasique);
glutKeyboardFunc(key);
glutSpecialFunc(specialBasique);
glutMotionFunc(motionBasique);
glutMouseFunc(sourisBasique);
glutDisplayFunc(display);
glutIdleFunc(idle);
glutMainLoop();
return(0);
}
RETOUR