6. Vizatime te tjera dydimensionale, koncepti i perspektives

Per  te realizuar nje vizatim ne perspektive mjafton te krijojme nje funksion I cili e vizaton objektin vetem 1 here dhe pastaj kete funksion e therrasim aq here sa duam ne funksionin Display() duke e zmadhuar ose zvogeluar ne baze te nje koeficienti per te krijuar idene e perspektives ne syrin e njeriut.

Ushtrim: Ndertoni nje program qe te vizatoje 10 peme ne perspektive

#include<gl/glut.h>

void tree(int x, int y, float size)

{

  glBegin(GL_QUADS);

  glColor3f(0.6,0.2,0.2);

  glVertex2f(x,y);

  glVertex2f(x+20*size,y);

  glVertex2f(x+20*size,y+50*size);

  glVertex2f(x,y+50*size);

  glColor3f(0.0,1.0,0.0);

  glVertex2f(x-5*size,y+60*size);

  glVertex2f(x+10*size,y+40*size);

  glVertex2f(x+25*size,y+60*size);

  glVertex2f(x+10*size,y+100*size);

  glEnd();

}

void Display()

{

  glClear(GL_COLOR_BUFFER_BIT);

  int x=300;

  int y=300;

  float size=0.2;

  for(int i=0;i<10;i++)

  {

  tree(x,y,size);

  x-=40*size;

  y-=40;

  size+=0.2;

  }

  glFlush();

}

void init()

{

  glClearColor(0.0,0.0,0.0,1.0);

  glViewport(0,0,500,500);

  gluOrtho2D(0.0,300.0,0.0,300.0);

}

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

{

  glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);

  glutInitWindowSize(500,500);

  glutCreateWindow("Peme");

  init();

  glutDisplayFunc(Display);

  glutMainLoop();

}

Ushtrim: Ndertoni nje program qe vizaton nje yll

#include<gl/glut.h>

void Display()

{

  glClear(GL_COLOR_BUFFER_BIT);

  glBegin(GL_LINE_LOOP); //bashkimi I pikave me nje vije te vazhduar te mbyllur

  glColor3f(0.0,1.0,1.0);

  glVertex2f(12.0,4.0);

  glVertex2f(27.0,19.0);

  glVertex2f(45.0,4.0);

  glVertex2f(40.0,27.0);

  glVertex2f(58.0,37.0);

  glVertex2f(36.0,37.0);

  glVertex2f(29.0,60.0);

  glVertex2f(23.0,38.0);

  glVertex2f(0.0,38.0);

  glVertex2f(15.0,26.0);

  glEnd();

  glFlush();

}

void init()

{

  glClearColor(0.0,0.0,0.0,1.0);

  glViewport(0,0,320,240);

  gluOrtho2D(0.0,160.0,0.0,120.0);

}

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

{

  glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);

  glutInitWindowSize(320,240);

  glutCreateWindow("Yll");

  init();

  glutDisplayFunc(Display);

  glutMainLoop();

}

Ushtrim: Ndertoni nje program ne OpenGL qe vizaton nje makine

#include<gl/glut.h>

#include<math.h>

#define PI 3.14

GLint n=100;

void rrethi2f(float x,float y, float 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);

  glBegin(GL_QUADS);

  glColor3f(0.0,0.7,0.3);

  glVertex2f(5.0,20.0);

  glVertex2f(70.0,20.0);

  glVertex2f(70.0,30.0);

  glVertex2f(5.0,30.0);

  glColor3f(1.0,0.0,0.0);

  glVertex2f(20.0,30.0);

  glVertex2f(45.0,30.0);

  glVertex2f(45.0,40.0);

  glVertex2f(20.0,20.0);

  glColor3f(1.0,1.0,1.0);

  glVertex2f(30.0,30.0);

  glVertex2f(40.0,30.0);

  glVertex2f(40.0,35.0);

  glVertex2f(30.0,35.0);

  glEnd();

  rrethi2f(23.0,15.0,6.0);

  rrethi2f(56.0,15.0,6.0);

  glFlush();

}

void init()

{

  glClearColor(0.0,0.0,0.0,1.0);

  glViewport(0,0,320,240);

  gluOrtho2D(0.0,160.0,0.0,120.0);

}

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

{

  glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);

  glutInitWindowSize(320,240);

  glutCreateWindow("Makine");

  init();

  glutDisplayFunc(Display);

  glutMainLoop();

}