Menggambar Stopwatch Analog pada GLUT

Berikut adalah program Stopwatch Analog menggunakan Open GL

Sourcecode : 

 

#include <stdlib.h>

#include <glut.h>

#include <math.h>

#define PI 3.14

float sudut = 0;

int n;

void kotak(int x, int y){

       glBegin (GL_QUADS );

              glVertex2d (x,y);

              glVertex2d (x,-y);

              glVertex2d (-x,-y);

              glVertex2d (-x,y);

       glEnd() ;

}

void titikangka(float jarak, float x, float y) {

 glPointSize(10);

 glBegin(GL_POINTS);

  glColor3f(0,0,0);

  for(n=0;n<360;n+=30)

   glVertex2f(jarak*(float)sin(n*PI/180)+x,jarak*(float)cos(n*PI/180)+y);

 glEnd();

}

void titikmenit(float jarak, float x, float y) {

 glPointSize(2);

 glBegin(GL_POINTS);

  glColor3f(0,0,0);

  for(n=0;n<360;n+=6)

   glVertex2f(jarak*(float)sin(n*PI/180)+x,jarak*(float)cos(n*PI/180)+y);

 glEnd();

}

void Jam(){

        glBegin(GL_POLYGON);

               glColor3f(0,0,0);

               glVertex2i(0,170);

               glVertex2i(15,150);

               glVertex2i(7,150);

               glVertex2i(7,0);

               glVertex2i(-7,0);

               glVertex2i(-7,150);

               glVertex2i(-15,150);

        glEnd();

}

void Menit(){

        glBegin(GL_POLYGON);

        glColor3f(0,0,0);

               glVertex2i(0,220);

               glVertex2i(10,200);

               glVertex2i(5,200);

               glVertex2i(5,0);

               glVertex2i(-5,0);

               glVertex2i(-5,200);

               glVertex2i(-10,200);

        

        glEnd();

}

void Detik(){

        glBegin(GL_TRIANGLES);

        glColor3f(1,0,0);

        glVertex2i(0,240);

        glVertex2i(5,-60);

        glVertex2i(-5,-60);

        glEnd();

}

void tampil(void){

        glClear(GL_COLOR_BUFFER_BIT);

               glColor3f(0,1,0);

               kotak(280,280);

               glColor3f(1,1,0);

               kotak(260,260);

               titikangka(240.,0.,0.);

               titikmenit(240.,0.,0.);

        

               glPushMatrix();

               glRotatef(sudut,0,0,1);

               Detik();

               glPopMatrix();

               glPushMatrix();

               glRotatef(sudut/60,0,0,1);

               Menit();

               glPopMatrix();

               glPushMatrix();

               glRotatef(sudut/720,0,0,1);

               Jam();

               glPopMatrix();

        glFlush();

}

void timer(int value){

        sudut-=6;

        glutPostRedisplay();

        glutTimerFunc(1000/12,timer,0);

}

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

        glutInit(&argc, argv);

        glutInitWindowPosition(100,100);

        glutInitWindowSize(400,400);

        glutCreateWindow("StopWatch");

              gluOrtho2D(-320.,320.,-320.,320.);

        glutDisplayFunc(tampil );

        glutTimerFunc(1,timer,0);

        glutMainLoop();

}

Tampilan printscreen :