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Friday, July 15, 2016

9. Funksioni update, realizimi i ngjarjeve ne njesine e kohes

Per te realizuar ngjarje te ndryshme si zhvendosja, shformimi ose rrotullimi I objekteve ne njesine e kohes duhet te perdorim funksionin glutTimerFunc(t,update,0) I cili mer si parameter kohen ne milisekonda, funksionin update ne te cilin ai vepron dhe koeficientin e ketij funksioni I cili merr vleren 0 ose 1. Ne funksionin update realzizohen ndryshimet e deshiruara.

Ushtrim: Ndertoni nje program I cili vizaton nje katror dhe e zhvendos ate me 20 njesi djathtas per cdo sekonde


#include<gl/glut.h>
int here=0;
void Display()
{
  glClear(GL_COLOR_BUFFER_BIT);
  glTranslatef(20.0*here,0.0,0.0);
  glRectf(-5.0,-5.0,5.0,5.0);
  glFlush();
}
void init()
{
  glClearColor(0.2,0.3,0.4,1.0);
  glViewport(-200,-200,300,300);
  gluOrtho2D(-200.0,300.0,-200.0,300.0);
  glMatrixMode(GL_MODELVIEW);
}
void update(int value)
{
  here++;
  glutPostRedisplay();
  glutTimerFunc(1000,update,0);
}
int main(int argc, char* argv[])
{
  glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);
  glutInitWindowSize(300,300);
  glutCreateWindow("test");
  init();
  glutDisplayFunc(Display);
  glutTimerFunc(1000,update,0);
  glutMainLoop();
}

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