petit programme très simple implementant quelque fonctions de opengl, pour débuter ds le domaine de la 3D.
Source / Exemple :
//main.c
/*****************************************************************
/ BoBRobert
/*****************************************************************
/*Une petite "démo" pour commencer
Bon ttes les fct ne st pas utils mais le but est de faire un moteur d'affichage réutilisable*/
//#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <GL/glut.h>
#include <math.h>
#include <time.h>
//Mes objets perso
#include "formes.h"
//#include "readconf.h"
void affichage();
void clavier(unsigned char touche, int x, int y);
void reshape(int, int);
void mouse(int,int,int,int);
void mousemotion(int,int);
char presseL, presseD;/*varible globale pour l'état de la sourie*/
int px,py,pz;
/*Structure permettant la définition d'un point (ca peut kan meme servir lol)*/
typedef struct{
float x;
float y;
float z;
float r;
float g;
float b;
}point;
/*fonction d'initialisation de la fenêtre de rendu*/
/*paramètres en entrée :
- Position de la fenêtre x,y
- taille de la fenêtre x,y
- nom de la fenêtre (string) max 19 caractères
void Glut_Window(int xPos,int yPos,int xTaille,int yTaille,char WinName[20]){
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
glutInitWindowPosition(xPos,yPos);/*position de la fenetre*/
glutInitWindowSize(xTaille,yTaille);/*taille de la fenetre*/
glutCreateWindow(WinName);/*création de la fenetre*/
}
/*fonction de gestion du redimentionnement de la fenetre de rendu(pas super o point)*/
void reshape(int xWin,int yWin){
if(xWin<yWin)
glViewport(0,(yWin-xWin)/2,xWin,xWin);
else
glViewport((xWin-yWin)/2,0,yWin,yWin);
}
/*Paramètres d'initialisation de la belle scène*/
void Glut_Init_Screen(){
glClearColor(0.0,1.0,1.0,0.0);//efface tt
glColor3f(1.0,1.0,1.0);//initialise la couleure de font
glPointSize(2.0);//taille des points
glEnable(GL_DEPTH_TEST);
}
/*gère les entrées sortie*/
void Glut_IO(){
glutDisplayFunc(affichage);//No Comment lol
glutKeyboardFunc(clavier);
glutReshapeFunc(reshape);
glutMouseFunc(mouse);
glutMotionFunc(mousemotion);
}
/*gestion des évennement clavier*/
void clavier(unsigned char touche,int x,int y)
{
switch (touche){
case 'p': /*carre plein */
glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
glutPostRedisplay();
break;
case 'f': /*fil de fer */
glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
glutPostRedisplay();
break;
case 's': /* sommets*/
glPolygonMode(GL_FRONT_AND_BACK,GL_POINT);
glutPostRedisplay();
break;
/*case 'z':
px++;
glutPostRedisplay();
break;
case 'd':
px--;
glutPostRedisplay();
break;*/
case 'q' : /*quitte */
exit(0);
}
}
/*fonction déterminant l'état des boutons de la sourie*/
void mouse(int button, int stat, int x, int y){
//pour le bouton gauche
//détermine si le bouton gauche est pressé
if(button == GLUT_LEFT_BUTTON &stat == GLUT_DOWN){
presseL=1;//état du bouton
xold=x;
yold=y;
}
//si relaché
if(button ==GLUT_LEFT_BUTTON &stat == GLUT_UP)
presseL=0;
//pour le bouton droit
}
void mousemotion(int x, int y){
if(presseL==1){
anglex=anglex+(x-xold);
angley=angley+(y-yold);
glutPostRedisplay();
}
xold=x;
yold=y;
}
/*fct d'affichage de la scène*/
void affichage()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//Coeur3D();
//glTranslatef(-px,0.0,-pz);
cube();
//Disque(1,1,1,1);
//glutWireSphere(1,20,20);
glFlush();
glutSwapBuffers();
}
//Le Bo main
int main(int argc, char **argv){
printf("Welcome in THE opengl World\n");
//read_conf();
glutInit(&argc,argv);/*initialise GLUT*/
Glut_Window(200,200,500,500,"OpenGL Power!!!!!!");/*initialisation de la fenetre*/
Glut_Init_Screen();/*paramètres de la scène*/
Glut_IO();/*entrées sorties*/
glutMainLoop();
return 0;
}
//formes.h a mettre ds un autre ficher
/*lib de ttes les formes (lol)*/
int anglex, angley, x, y, xold, yold;//variables globales de gestion de la position de la sourie
/*définition d'objets divers et variée*/
void rotation(){
glLoadIdentity();
glRotatef(-angley,1.1,0.0,0.0);
glRotatef(-anglex,0.0,1.0,0.0);
}
//carré 2D
void Carre2D(){
//carré
glBegin(GL_POLYGON);
glColor3f(1.0,0.0,0.0);
glVertex2f(-0.5,-0.5);
glColor3f(0.0,1.0,0.0);
glVertex2f(0.5,-0.5);
glColor3f(0.0,0.0,1.0);
glVertex2f(0.5,0.5);
glColor3f(1.0,1.0,1.0);
glVertex2f(-0.5,0.5);
glEnd();
}
//cube
void cube(){
rotation();
glBegin(GL_POLYGON);
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.5,-0.5,-0.5);
glColor3f(0.0,1.0,0.0);
glVertex3f(0.5,-0.5,-0.5);
glColor3f(0.0,0.0,1.0);
glVertex3f(0.5,0.5,-0.5);
glColor3f(1.0,1.0,1.0);
glVertex3f(-0.5,0.5,-0.5);
glEnd();
glBegin(GL_POLYGON);
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.5,-0.5,0.5);
glColor3f(0.0,1.0,0.0);
glVertex3f(0.5,-0.5,0.5);
glColor3f(0.0,0.0,1.0);
glVertex3f(0.5,0.5,0.5);
glColor3f(1.0,1.0,1.0);
glVertex3f(-0.5,0.5,0.5);
glEnd();
glBegin(GL_POLYGON);
glColor3f(1.0,0.0,0.0);
glVertex3f(0.5,0.5,-0.5);
glColor3f(0.0,1.0,0.0);
glVertex3f(-0.5,0.5,-0.5);
glColor3f(0.0,0.0,1.0);
glVertex3f(-0.5,0.5,0.5);
glColor3f(1.0,1.0,1.0);
glVertex3f(0.5,0.5,0.5);
glEnd();
glBegin(GL_POLYGON);
glColor3f(1.0,0.0,0.0);
glVertex3f(0.5,-0.5,-0.5);
glColor3f(0.0,1.0,0.0);
glVertex3f(-0.5,-0.5,-0.5);
glColor3f(0.0,0.0,1.0);
glVertex3f(-0.5,-0.5,0.5);
glColor3f(1.0,1.0,1.0);
glVertex3f(0.5,-0.5,0.5);
glEnd();
glBegin(GL_POLYGON);
glColor3f(1.0,0.0,0.0);
glVertex3f(0.5,-0.5,-0.5);
glColor3f(0.0,1.0,0.0);
glVertex3f(0.5,0.5,-0.5);
glColor3f(0.0,0.0,1.0);
glVertex3f(0.5,0.5,0.5);
glColor3f(1.0,1.0,1.0);
glVertex3f(0.5,-0.5,0.5);
glEnd();
glBegin(GL_POLYGON);
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.5,-0.5,-0.5);
glColor3f(0.0,1.0,0.0);
glVertex3f(-0.5,0.5,-0.5);
glColor3f(0.0,0.0,1.0);
glVertex3f(-0.5,0.5,0.5);
glColor3f(1.0,1.0,1.0);
glVertex3f(-0.5,-0.5,0.5);
glEnd();
}
//disque
void Disque(int rayon,int R,int G, int B){
int i;
glBegin(GL_POLYGON);
for(i=0;i<361;i++){
glColor3f(R,G,B);
glVertex3f(rayon*cos(i*3.14/180),rayon*sin(i*3.14/180),0);
}
glEnd();
}
//Arc de disque
void ArcDisque(int rayon,int debut,int fin,int R,int G, int B){
int i;
glBegin(GL_POLYGON);
glVertex3f(0,0,0);
for(i=debut;i<fin;i++){
glColor3f(R,G,B);
glVertex3f(rayon*cos(i*3.14/180),rayon*sin(i*3.14/180),0);
}
glEnd();
}
//coeur en 2D(o comme il est bo :$)
void Coeur2D(){
glBegin(GL_POLYGON);
//droite
glColor3f(1.0,0.0,0.0);
glVertex2f(0.0,-0.6);//a0
glColor3f(1.0,0.0,0.0);
glVertex2f(0.1,-0.5);//a1
glColor3f(1.0,0.0,0.0);
glVertex2f(0.2,-0.4);//a2
glColor3f(1.0,0.0,0.0);
glVertex2f(0.3,-0.25);//a3
glColor3f(1.0,0.0,0.0);
glVertex2f(0.4,-0.05);//a4
glColor3f(1.0,0.0,0.0);
glVertex2f(0.5,0.15);//a5
glColor3f(1.0,0.0,0.0);
glVertex2f(0.55,0.25);//a6
glColor3f(1.0,0.0,0.0);
glVertex2f(0.5,0.35);//a7
glColor3f(1.0,0.0,0.0);
glVertex2f(0.4,0.5);//a8
glColor3f(1.0,0.0,0.0);
glVertex2f(0.25,0.55);//a9
glColor3f(1.0,0.0,0.0);
glVertex2f(0.1,0.5);//a10
glColor3f(1.0,0.0,0.0);
glVertex2f(0.05,0.45);//a11
glColor3f(1.0,0.0,0.0);
glVertex2f(0.0,0.3);//a12
//gauche
glColor3f(1.0,0.0,0.0);
glVertex2f(-0.0,-0.6);//-a0
glColor3f(1.0,0.0,0.0);
glVertex2f(-0.1,-0.5);//-a1
glColor3f(1.0,0.0,0.0);
glVertex2f(-0.2,-0.4);//-a2
glColor3f(1.0,0.0,0.0);
glVertex2f(-0.3,-0.25);//-a3
glColor3f(1.0,0.0,0.0);
glVertex2f(-0.4,-0.05);//-a4
glColor3f(1.0,0.0,0.0);
glVertex2f(-0.5,0.15);//-a5
glColor3f(1.0,0.0,0.0);
glVertex2f(-0.55,0.25);//-a6
glColor3f(1.0,0.0,0.0);
glVertex2f(-0.5,0.35);//-a7
glColor3f(1.0,0.0,0.0);
glVertex2f(-0.4,0.5);//-a8
glColor3f(1.0,0.0,0.0);
glVertex2f(-0.25,0.55);//-a9
glColor3f(1.0,0.0,0.0);
glVertex2f(-0.1,0.5);//-a10
glColor3f(1.0,0.0,0.0);
glVertex2f(-0.05,0.45);//-a11
glColor3f(1.0,0.0,0.0);
glVertex2f(-0.0,0.3);//-a12
glEnd();
}
//coeur en 3D encore plus bo
void Coeur3D(){
//annimation
rotation();
glBegin(GL_POLYGON);
//droite
glColor3f(1.0,1.0,0.0);
glVertex3f(0.0,-0.6,0.25);//a0
glColor3f(1.0,1.0,0.0);
glVertex3f(0.1,-0.5,0.25);//a1
glColor3f(1.0,1.0,0.0);
glVertex3f(0.2,-0.4,0.25);//a2
glColor3f(1.0,0.0,0.0);
glVertex3f(0.3,-0.25,0.25);//a3
glColor3f(1.0,0.0,0.0);
glVertex3f(0.4,-0.05,0.25);//a4
glColor3f(1.0,0.0,0.0);
glVertex3f(0.5,0.15,0.25);//a5
glColor3f(1.0,0.0,0.0);
glVertex3f(0.55,0.25,0.25);//a6
glColor3f(1.0,0.0,0.0);
glVertex3f(0.5,0.35,0.25);//a7
glColor3f(1.0,0.0,0.0);
glVertex3f(0.4,0.5,0.25);//a8
glColor3f(1.0,0.0,0.0);
glVertex3f(0.25,0.55,0.25);//a9
glColor3f(1.0,0.0,0.0);
glVertex3f(0.1,0.5,0.25);//a10
glColor3f(1.0,0.0,0.0);
glVertex3f(0.05,0.45,0.25);//a11
glColor3f(1.0,0.0,0.0);
glVertex3f(0.0,0.3,0.25);//a12
//gauche
glColor3f(1.0,1.0,0.0);
glVertex3f(-0.0,-0.6,0.25);//-a0
glColor3f(1.0,1.0,0.0);
glVertex3f(-0.1,-0.5,0.25);//-a1
glColor3f(1.0,1.0,0.0);
glVertex3f(-0.2,-0.4,0.25);//-a2
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.3,-0.25,0.25);//-a3
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.4,-0.05,0.25);//-a4
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.5,0.15,0.25);//-a5
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.55,0.25,0.25);//-a6
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.5,0.35,0.25);//-a7
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.4,0.5,0.25);//-a8
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.25,0.55,0.25);//-a9
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.1,0.5,0.25);//-a10
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.05,0.45,0.25);//-a11
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.0,0.3,0.25);//-a12
glEnd();
glBegin(GL_POLYGON);
//droite
glColor3f(1.0,1.0,0.0);
glVertex3f(0.0,-0.6,-0.25);//a0
glColor3f(1.0,1.0,0.0);
glVertex3f(0.1,-0.5,-0.25);//a1
glColor3f(1.0,1.0,0.0);
glVertex3f(0.2,-0.4,-0.25);//a2
glColor3f(1.0,0.0,0.0);
glVertex3f(0.3,-0.25,-0.25);//a3
glColor3f(1.0,0.0,0.0);
glVertex3f(0.4,-0.05,-0.25);//a4
glColor3f(1.0,0.0,0.0);
glVertex3f(0.5,0.15,-0.25);//a5
glColor3f(1.0,0.0,0.0);
glVertex3f(0.55,0.25,-0.25);//a6
glColor3f(1.0,0.0,0.0);
glVertex3f(0.5,0.35,-0.25);//a7
glColor3f(1.0,0.0,0.0);
glVertex3f(0.4,0.5,-0.25);//a8
glColor3f(1.0,0.0,0.0);
glVertex3f(0.25,0.55,-0.25);//a9
glColor3f(1.0,0.0,0.0);
glVertex3f(0.1,0.5,-0.25);//a10
glColor3f(1.0,0.0,0.0);
glVertex3f(0.05,0.45,-0.25);//a11
glColor3f(1.0,0.0,0.0);
glVertex3f(0.0,0.3,-0.25);//a12
//gauche
glColor3f(1.0,1.0,0.0);
glVertex3f(-0.0,-0.6,-0.25);//-a0
glColor3f(1.0,1.0,0.0);
glVertex3f(-0.1,-0.5,-0.25);//-a1
glColor3f(1.0,1.0,0.0);
glVertex3f(-0.2,-0.4,-0.25);//-a2
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.3,-0.25,-0.25);//-a3
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.4,-0.05,-0.25);//-a4
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.5,0.15,-0.25);//-a5
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.55,0.25,-0.25);//-a6
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.5,0.35,-0.25);//-a7
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.4,0.5,-0.25);//-a8
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.25,0.55,-0.25);//-a9
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.1,0.5,-0.25);//-a10
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.05,0.45,-0.25);//-a11
glColor3f(1.0,0.0,0.0);
glVertex3f(-0.0,0.3,-0.25);//-a12
glEnd();
}
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