/* Auteur: Nicolas JANEY */
/* nicolas.janey@univ-fcomte.fr */
/* Avril 2001 */
/* Programmation du calcul */
/* d'une courbe de Bezier OpenGL */
#include <math.h>
#include <stdio.h>
#include <GL/glut.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include "ModuleCouleurs.h"
#include "ModuleFont.h"
#include "ModuleManipulateur.h"
#include "ModuleMenus.h"
#include "ModuleReshape.h"
static GLfloat pts[7][3] = {
{3,2,-1},{-4,5,-4},
{-5,4,3},{-1,-3,-2},
{4,-1,0}};
void traceBezierGL(void) {
glMap1f(GL_MAP1_VERTEX_3,
0.0,1.0,3,5,&pts[0][0]);
glEnable(GL_MAP1_VERTEX_3);
glColor4fv(couleurCyan());
glBegin(GL_POINTS);
for ( int i = 0 ; i <= 100 ; i++ )
glEvalCoord1f((GLfloat) i/100.0F);
glEnd();
}
void display(void) {
int i;
glClear(GL_COLOR_BUFFER_BIT|
GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glEnable(GL_DEPTH_TEST);
manipulateurSouris();
manipulateurClavier();
traceBezierGL() ;
glPointSize(5.0);
glColor4fv(couleurJaune());
glBegin(GL_POINTS);
for ( i = 0 ; i < 5 ; i++ )
glVertex3fv(&pts[i][0]);
glEnd();
glPointSize(1.0);
glColor4fv(couleurMagenta());
glBegin(GL_LINE_STRIP);
for ( i = 0 ; i < 5 ; i++ )
glVertex3fv(&pts[i][0]);
glEnd();
glDisable(GL_DEPTH_TEST);
glColor4fv(couleurJaune());
for ( i = 0 ; i < 5 ; i++ ) {
placeFontCursor(pts[i][0]+0.3F,
pts[i][1]+0.3F,
pts[i][2]+0.3F);
simpleBitmapOutput("%d",i); }
glPopMatrix();
glFlush();
glutSwapBuffers();
}
void myinit(void) {
glClearColor(0.0,0.0,0.0,1.0);
glShadeModel(GL_FLAT);
glDepthFunc(GL_LESS);
}
int main(int argc,char **argv) {
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_RGBA|GLUT_DEPTH|GLUT_DOUBLE);
glutInitWindowSize(300,300);
glutInitWindowPosition(50,50);
glutCreateWindow("Courbe de Bezier");
myinit();
creationMenuBasique();
setParametresOrthoBasique(-7.0,7.0,-7.0,7.0,-500.0,500.0);
setManipulateurDistance(1.0F);
glutReshapeFunc(reshapeOrthoBasique);
glutKeyboardFunc(keyBasique);
glutSpecialFunc(specialBasique);
glutMotionFunc(motionBasique);
glutMouseFunc(sourisBasique);
glutDisplayFunc(display);
glutMainLoop();
return(0);
}