UAS Grafika

Soal 

2. Gambarkan hasil keluaran dari potongan program fungsi draw dibawah ini.

void draw(){ 

glBegin(GL_LINE_LOOP);

glVertex2i(0,0);

glVertex2i(20,40);

glVertex2i(-10,70);

glVertex2i(-50,-60);

glEnd();

}

3. Gambarkan hasil keluaran dari potongan program fungsi draw dan display dibawah ini

void draw(){ 

glBegin(GL_TRIANGLES);

glVertex2i(-20,0);

glVertex2i(0,30);

glVertex2i(20,0);

glEnd();

}

void display(){ 

glClear(GL_COLOR_BUFFER_BIT);

glTranslatef(-50,-50,0);

draw();

glFlush();

}

4. Tuliskan potongan program fungsi animasi agar objek yang digambar (fungsi draw) pada soal nomor 3 dapat begerak berputar secara clockwise.

Jawab:

2. Source code full:

#include <stdlib.h>

#include <GL/glut.h>

void draw(){ 

glBegin(GL_LINE_LOOP);

glVertex2i(0,0);

glVertex2i(20,40);

glVertex2i(-10,70);

glVertex2i(-50,-60);

glEnd();

}

void display(){ 

glClear(GL_COLOR_BUFFER_BIT);

draw();

glFlush();

}

void main (int argc, char **argv) {

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_DEPTH | GLUT_SINGLE | GLUT_RGBA);

glutInitWindowPosition(100,100);

glutInitWindowSize(520,520);

glutCreateWindow("nomer 2");

glClearColor(1.0, 1.0, 1.0, 0.0);

gluOrtho2D(-100, 100, -100, 100);

glutDisplayFunc(display);

glColor3f (0.0,1.0,0.0);

glutMainLoop();

}

Tampilan:

3. Source code full:

#include <stdlib.h>

#include <GL/glut.h>

void draw(){ 

glBegin(GL_TRIANGLES);

glVertex2i(-20,0);

glVertex2i(0,30);

glVertex2i(20,0);

glEnd();

}

void display(){ 

glClear(GL_COLOR_BUFFER_BIT);

glTranslatef(-50,-50,0);

draw();

glFlush();

}

void main (int argc, char **argv) {

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_DEPTH | GLUT_SINGLE | GLUT_RGBA);

glutInitWindowPosition(100,100);

glutInitWindowSize(520,520);

glutCreateWindow("nomer 3");

glClearColor(1.0, 1.0, 1.0, 0.0);

gluOrtho2D(-100, 100, -100, 100);

glutDisplayFunc(display);

glColor3f (0.0,1.0,0.0);

glutMainLoop();

}

Tampilan:

4. Source code full:

#include <stdlib.h>

#include <gl/glut.h>

int y=0;

void Draw()

{

glBegin(GL_TRIANGLES);

glVertex2i(-20,0);

glVertex2i(0,30);

glVertex2i(20,0);

glEnd();

glFlush();

}

void display(void)

{

   glClear(GL_COLOR_BUFFER_BIT);

   glPushMatrix();

   glRotatef( y, 0, 0, 1);

   Draw();

   glPopMatrix();

   glFlush();

}

void timer(int value)

{

   y -=15;

   glutPostRedisplay();

   glutTimerFunc(100,timer,10);

}

int main(int argc, char **argv)

{

   glutInit(&argc, argv);

   glutInitDisplayMode(GLUT_DEPTH | GLUT_SINGLE | GLUT_RGBA);

   glutInitWindowPosition(100,100);

   glutInitWindowSize(400,400);

   glutCreateWindow("no4");

   gluOrtho2D(-100, 100, -100, 100);

   glutDisplayFunc(display);

   glutTimerFunc(100, timer, 10);

   glutMainLoop();

}

Tampilan:

Clockwise itu berputar searah jarum jam...