8. Transformimet gjeometrike (vazhdim), zhvendosja, rrotullimi

Transformimet gjeometrike mund ti zbatojme ne nje cikel heresh mbi objekte te ndryshem dhe kjo lehteson mjaftueshem vizatimin e disa objekteve identik ne pozicione , kende apo madhesi te ndryshme.

Ushtrim: Ndertoni nje program qe vizaton nje rreth dhe e zhvendos ate 15 here me 20 njesi ne boshtin x

#include<gl/glut.h>

#include<math.h>

#define PI 3.14

GLint n=100;

void rrethi(GLfloat x, GLfloat y, GLfloat rreze){

GLint i;

GLdouble theta;

glBegin(GL_POLYGON);

for(i=0;i<n;i++){

theta=2*PI*i/n; //kendi ne radian

glVertex2f(x+rreze*cos(theta), y+rreze*sin(theta));

}

glEnd();

}

void Display()

{

  glClear(GL_COLOR_BUFFER_BIT);

  for(int i=0;i<15;i++)

  {

  glTranslatef(20,0,0);

  rrethi(20.,20.,10.);

    }

    glFlush();

}

void init()

{

  glClearColor(1.0,0.0,0.0,1.0);

  glViewport(0,0,500,500);

  gluOrtho2D(0.0,500.0,0.0,500.0);

}

int main(int argc, char* argv[])

{

  glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);

  glutInitWindowSize(400,400);

  glutCreateWindow("Test");

  init();

  glutDisplayFunc(Display);

  glutMainLoop();

}

Ushtrim: Ndertoni nje program qe vizaton nje elips dhe e rrotullon ate 12 here me kend 30 grad  rreth qendres

#include<gl/glut.h>

#include<math.h>

#define PI 3.14

GLint n=100;

void elipsi(GLfloat x, GLfloat y, GLfloat rx, GLfloat ry){

GLint i;

GLdouble theta;

glBegin(GL_POLYGON);

for(i=0;i<n;i++){

theta=2*PI*i/n; //kendi ne radian

glVertex2f(x+rx*cos(theta), y+ry*sin(theta));

}

glEnd();

}

void Display()

{

  glClear(GL_COLOR_BUFFER_BIT);

  for(int i=0;i<12;i++)

  {

  glRotatef(30.,0,0,1);

  elipsi(200.,100.,50.,30.);

    }

    glFlush();

}

void init()

{

  glClearColor(0.6,0.4,0.3,1.0);

  glViewport(-400,-300,500,500);

  gluOrtho2D(-400.0,500.0,-400.0,500.0);

}

int main(int argc, char* argv[])

{

  glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);

  glutInitWindowSize(500,500);

  glutCreateWindow("Test");

  init();

  glutDisplayFunc(Display);

  glutMainLoop();

}