OpenGL (glTranslated & glRotated)

//
//  main.cpp
//  OpenGL02
//
//  Created by Alexander Kevin on 3/3/16.
//  Copyright © 2016 Alexander Kevin. All rights reserved.
//

#ifdef WIN32
#include <windows.h>
#endif

#include <stdlib.h>
#include <iostream>
#include <fstream>

#ifdef __APPLE__
#include <GLUT/glut.h>
#include <OpenGL/gl.h>
#include <OpenGL/glu.h>
#else
#include <GL/glut.h>
#include <GL/glu.h>
#include <GL/gl.h>
#endif

void display()
{
    glClear(GL_COLOR_BUFFER_BIT);
    glColor3f(0.0,0.0,0.5);
    glFlush();
}

void displaysoalsatu()
{
    glClear(GL_COLOR_BUFFER_BIT);
    glColor3f(0.0,0.0,0.5);
    int x=-25,y=-25,xp=-20,yl=-20;//xp=panjang, y;=lebar);
    //bikin checkboard
    while(y!=70){
        glRecti(x,y, xp, yl);
        x+=10;
        xp+=10;
        //printf("%d %d %d %d\n",x,y,xp,yl);
        if(x>=70&&y!=70){
            //printf("baris baru\n\n");
            y+=5;
            if(x==75){
                x=-20;
                xp=-15;
            }
            else{
                x=-25;
                xp=-20;
            }
            yl+=5;
        }
    }
    glFlush();
}

void displaysoaldua()
{
    glClear(GL_COLOR_BUFFER_BIT);
    glColor3f(0.5,0.5,0.5);
    int rot=0;
    glRecti(22.5,37.5,27.5,42.5);
    do{
        glTranslated(25, 25, 0);
        glRotated(30, 0, 0, 1);
        glTranslated(-25, -25, 0);
        if(rot%2==1)
            glRecti(22.5,37.5,27.5,42.5);
        else
            glRecti(23.5,38.5,26,41);
        rot++;
    }while(rot!=16);
    rot=0;
    do{
        glColor3f(0.5,0.8,0.5);
        glTranslated(25, 25, 0);
        glRotated(0.1, 0, 0, 1);
        glTranslated(-25, -25, 0);
        glRecti(24.9,39.9,25.1,40.1);
        rot++;
    }while(rot!=3600);
    glFlush();
}

void displaysoaltiga()
{
    glClear(GL_COLOR_BUFFER_BIT);
    glColor3f(0.5,0.8,0.5);
    int rot=0;
    do{
        glTranslated(25, 25, 0);
        glRotated(30, 0, 0, 1);
        glTranslated(-25, -25, 0);
        glRecti(22.5,37.5,27.5,42.5);
        rot++;
    }while(rot!=16);
    rot=0;
    do{
        glTranslated(25, 25, 0);
        glRotated(0.1, 0, 0, 1);
        glTranslated(-25, -25, 0);
        glRecti(24.9,39.9,25.1,40.1);
        glColor3f(0.5,0.5,0.5);
        rot++;
    }while(rot!=3600);
    glFlush();
}



void kunci(unsigned char key, int x, int y)
{
    static int rot=0;
    switch (key)
    {
            /* aplikasi berhenti ketika tombol q ditekan */
        case 27 :
        case 'q':
            exit(0);
            break;
        case 'z':
            glTranslated(25, 25, 0);
            glRotated(1, 0, 0, 1);
            glTranslated(-25, -25, 0);
            break;
        case 'c':
            glTranslated(25, 25, 0);
            glRotated(-1, 0, 0, 1);
            glTranslated(-25, -25, 0);
            break;
        case 'w':
            glTranslated(0, 0.5, 0);
            break;
        case 'a':
            glTranslated(-0.5, 0, 0);
            break;
        case 's':
            glTranslated(0, -0.5, 0);
            break;
        case 'd':
            glTranslated(0.5, 0, 0);
            break;
        case 'p':
            glutDisplayFunc(displaysoaltiga);
            break;
        case 'i':
            glLoadIdentity();
            glTranslated(25, 25, 0);
            glRotated(45, 0, 0, 1);
            glTranslated(-25, -25, 0);
            glutDisplayFunc(displaysoalsatu);
            break;
        case 'o':
            glutDisplayFunc(displaysoaldua);
            break;
    }
    glutPostRedisplay();
}

void myinit()
{
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluOrtho2D(0.0,50.0,0.0,50.0);
    glMatrixMode(GL_MODELVIEW);
    glClearColor(1.0,1.0,1.0,1.0);
    glColor3f(0.0,0.0,0.0);
}

int main(int argc, char* argv[])
{
    printf("Welcome,\n");
    printf("Press Keyboard\n");
    printf("(p) for square and circle(Case 2)\n");
    printf("(o) for improved square and circle(Case 3)\n");
    printf("(i) for checkboard(Case 1)\n");
    printf("for control use standart wasd (up,left,down,right)\n");
    printf("and z for left rotate and c for right rotate\n");
    printf("<press q to exit>\n");
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
    glutInitWindowSize(400,400);
    glutInitWindowPosition(100,100);
    glutCreateWindow("Transform");
    glutDisplayFunc(display);
    myinit();
    glutKeyboardFunc(kunci);
    glutMainLoop();
    return 0;
}