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…
