Membuat Bentuk Bintang dan Titik Segi Empat Dengan Open GL

Hello Mamang Coder kali ini mau bagi bagi script tentang pemograman grafis nih, yang mimin buat adalah gambar bintang dan titik seperti gambar di atas sok langsung simak codenya

/**************************
 * Includes
 *
 **************************/

#include <windows.h> //header awal
#include <gl/gl.h>//header awal


/**************************
 * Function Declarations
 *
 **************************/

LRESULT CALLBACK WndProc (HWND hWnd, UINT message,
WPARAM wParam, LPARAM lParam);
void EnableOpenGL (HWND hWnd, HDC *hDC, HGLRC *hRC);
void DisableOpenGL (HWND hWnd, HDC hDC, HGLRC hRC);


/**************************
 * WinMain
 *
 **************************/

int WINAPI WinMain (HINSTANCE hInstance,
                    HINSTANCE hPrevInstance,
                    LPSTR lpCmdLine,
                    int iCmdShow)
{
    WNDCLASS wc;
    HWND hWnd;
    HDC hDC;
    HGLRC hRC;     
    MSG msg;
    BOOL bQuit = FALSE;
    float theta = 0.0f;

    /* register window class */
    wc.style = CS_OWNDC;
    wc.lpfnWndProc = WndProc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon (NULL, IDI_APPLICATION);
    wc.hCursor = LoadCursor (NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH) GetStockObject (BLACK_BRUSH);
    wc.lpszMenuName = NULL;
    wc.lpszClassName = "GLSample";
    RegisterClass (&wc);

    /* create main window */
    hWnd = CreateWindow (
      "GLSample", "Ujian Praktek Punya Angga",//judul title bar
      WS_CAPTION | WS_POPUPWINDOW | WS_VISIBLE,
      0, 0, 600, 600,//ukuran windows
      NULL, NULL, hInstance, NULL);

    /* enable OpenGL for the window */
    EnableOpenGL (hWnd, &hDC, &hRC);

    /* program main loop */
    while (!bQuit)
    {
        /* check for messages */
        if (PeekMessage (&msg, NULL, 0, 0, PM_REMOVE))
        {
            /* handle or dispatch messages */
            if (msg.message == WM_QUIT)
            {
                bQuit = TRUE;
            }
            else
            {
                TranslateMessage (&msg);
                DispatchMessage (&msg);
            }
        }
        else
        {
            /* OpenGL animation code goes here */

            glClearColor (0.0f, 0.0f, 0.0f, 0.0f);
            glClear (GL_COLOR_BUFFER_BIT);
  glPointSize(5);//ukuran object
 
    glBegin(GL_POINTS); // membentuk titik persegi
glVertex3f(0.2, 0.2, 0.0);// Titik koordinat Point
glVertex3f(0.8, 0.2, 0.0);// Titik koordinat Point
glVertex3f(0.2, 0.5, 0.0);// Titik koordinat Point
glVertex3f(0.8, 0.5, 0.0);// Titik koordinat Point
glVertex3f(0.2, 0.8, 0.0);// Titik koordinat Point
glVertex3f(0.8, 0.8, 0.0);// Titik koordinat Point

glEnd();

glBegin(GL_TRIANGLES);    //membuat segitiga
  glVertex3f( 0.0f, 0.1f, 0.0f);  //titik koordinat
  glVertex3f( -0.1f,-0.1f, 0.0f); //titik koordinat
  glVertex3f( 0.1f,-0.1f, 0.0f); //titik koordinat


glBegin(GL_TRIANGLES); 
  glVertex3f( -0.1f, -0.1f, 0.0f); //titik koordinat
  glVertex3f( -0.3f,-0.12f, 0.0f); //titik koordinat
  glVertex3f( -0.1f,-0.36f, 0.0f);//titik koordinat

glBegin(GL_TRIANGLES);     
  glVertex3f( -0.14f, -0.3f, 0.0f); //titik koordinat
  glVertex3f( -0.22f,-0.55f, 0.0f);     //titik koordinat
  glVertex3f( 0.0f,-0.4f, 0.0f);//titik koordinat


  glBegin(GL_TRIANGLES);     
  glVertex3f( 0.0f, -0.4f, 0.0f); //titik koordinat
  glVertex3f( 0.22f,-0.55f, 0.0f);     //titik koordinat
  glVertex3f( 0.14f,-0.3f, 0.0f);//titik koordinat


  glBegin(GL_TRIANGLES);     
  glVertex3f( 0.14f, -0.3f, 0.0f);//titik koordinat
  glVertex3f( 0.3f, -0.12f, 0.0f);    //titik koordinat
  glVertex3f( 0.1f, -0.1f, 0.0f);//titik koordinat
glEnd();


glBegin(GL_QUADS);     //Membuat persegi 
  glVertex3f( 0.1f, -0.1f, 0.0f);//titik koordinat
  glVertex3f( -0.1f, -0.1f, 0.0f);//titik koordinat
  glVertex3f( -0.16f, -0.4f, 0.0f);     //titik koordinat
  glVertex3f( 0.16f, -0.4f, 0.0f);     //titik koordinat
glEnd();
glFlush();

         

            SwapBuffers (hDC);
        }
    }

    /* shutdown OpenGL */
    DisableOpenGL (hWnd, hDC, hRC);

    /* destroy the window explicitly */
    DestroyWindow (hWnd);

    return msg.wParam;
}


/********************
 * Window Procedure
 *
 ********************/

LRESULT CALLBACK WndProc (HWND hWnd, UINT message,
                          WPARAM wParam, LPARAM lParam)
{

    switch (message)
    {
    case WM_CREATE:
        return 0;
    case WM_CLOSE:
        PostQuitMessage (0);
        return 0;

    case WM_DESTROY:
        return 0;

    case WM_KEYDOWN:
        switch (wParam)
        {
        case VK_ESCAPE:
            PostQuitMessage(0);
            return 0;
        }
        return 0;

    default:
        return DefWindowProc (hWnd, message, wParam, lParam);
    }
}


/*******************
 * Enable OpenGL
 *
 *******************/

void EnableOpenGL (HWND hWnd, HDC *hDC, HGLRC *hRC)
{
    PIXELFORMATDESCRIPTOR pfd;
    int iFormat;

    /* get the device context (DC) */
    *hDC = GetDC (hWnd);

    /* set the pixel format for the DC */
    ZeroMemory (&pfd, sizeof (pfd));
    pfd.nSize = sizeof (pfd);
    pfd.nVersion = 1;
    pfd.dwFlags = PFD_DRAW_TO_WINDOW |
      PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
    pfd.iPixelType = PFD_TYPE_RGBA;
    pfd.cColorBits = 24;
    pfd.cDepthBits = 16;
    pfd.iLayerType = PFD_MAIN_PLANE;
    iFormat = ChoosePixelFormat (*hDC, &pfd);
    SetPixelFormat (*hDC, iFormat, &pfd);

    /* create and enable the render context (RC) */
    *hRC = wglCreateContext( *hDC );
    wglMakeCurrent( *hDC, *hRC );

}


/******************
 * Disable OpenGL
 *
 ******************/

void DisableOpenGL (HWND hWnd, HDC hDC, HGLRC hRC)
{
    wglMakeCurrent (NULL, NULL);
    wglDeleteContext (hRC);
    ReleaseDC (hWnd, hDC);
}