ENP1

#include <windows.h>
#include <stdlib.h>
#include <math.h>
#include<GL/gl.h>
#include<GL/glu.h>


void DrawScene(GLfloat xRot, GLfloat yRot, GLfloat* pos)
{
    int i;
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glLoadIdentity();

    glRotatef(xRot, 1.0f, 0.0f, 0.0f);
    glRotatef(yRot, 0.0f, 1.0f, 0.0f);

    glBegin(GL_LINES);
        glColor3f(1,1,1);
        glVertex3f(10,0,0);
        glVertex3f(-10,0,0);
        glVertex3f(0,10,0);
        glVertex3f(0,-10,0);
        glVertex3f(0,0,10);
        glVertex3f(0,0,-10);
    glEnd();

    glBegin(GL_QUADS);
        glColor3f(1, 0, 0);
        glVertex3f(-5, -5, 5);
        glVertex3f(-5, 5, 5);
        glVertex3f(5, 5, 5);
        glVertex3f(5, -5, 5);
    glEnd();

    glBegin(GL_QUADS);
        glColor3f(0, 1, 0);
        glVertex3f(-5, -5, -5);
        glVertex3f(-5, 5, -5);
        glVertex3f(5, 5, -5);
        glVertex3f(5, -5, -5);
    glEnd();

    glBegin(GL_QUADS);
        glColor3f(0, 0, 1);
        glVertex3f(-5, -5, -5);
        glVertex3f(-5, 5, -5);
        glVertex3f(-5, 5, 5);
        glVertex3f(-5, -5, 5);
    glEnd();

    glBegin(GL_QUADS);
        glColor3f(0.5, 0, 1);
        glVertex3f(5, -5, 5);
        glVertex3f(5, 5, 5);
        glVertex3f(5, 5, -5);
        glVertex3f(5, -5, -5);
    glEnd();

    glBegin(GL_QUADS);
        glColor3f(0.5, 0.5, 0);
        glVertex3f(-5, 5, 5);
        glVertex3f(5, 5, 5);
        glVertex3f(5, 5, -5);
        glVertex3f(-5, 5, -5);
    glEnd();

    glBegin(GL_QUADS);
        glColor3f(0, 0.5, 0.5);
        glVertex3f(-5, -5, 5);
        glVertex3f(-5, -5, -5);
        glVertex3f(5, -5, -5);
        glVertex3f(5, -5, 5);
    glEnd();

    glBegin(GL_POINTS);
    glPointSize(2);
    glColor3f(1, 1, 0);
    glVertex3f(pos[0], pos[1], pos[2]);
    glEnd();

    /*glBegin(GL_QUADS);
        glColor4f(0,1.0,0,0.6);
        glVertex3f(-3,-3,3);
        glVertex3f(-3,3,3);
        glVertex3f(3,3,3);
        glVertex3f(3,-3,3);
    glEnd();

    glBegin(GL_QUADS);
        glColor3f(0, 0, 0);
        glVertex3f(-3, -3, -3);
        glColor3f(0, 1, 0);
        glVertex3f(-3, 3, -3);
        glColor3f(1, 1, 0);
        glVertex3f(3, 3, -3);
        glColor3f(1, 0, 0);
        glVertex3f(3, -3, -3);
    glEnd();*/

    glFlush();

    glEnd();
    glFinish();
}

void SetMyPixelFormat(HDC hdc)
{
    PIXELFORMATDESCRIPTOR pfd;
    ZeroMemory(&pfd, sizeof(pfd));
    pfd.nSize = sizeof(pfd);
    pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
    pfd.iPixelType = PFD_TYPE_RGBA;
    pfd.cColorBits = 32;
    pfd.cDepthBits = 16;
    pfd.iLayerType = PFD_MAIN_PLANE;

    int nPixelFormat = ChoosePixelFormat(hdc, &pfd);
    SetPixelFormat(hdc, nPixelFormat, &pfd);
}
void ResizeWindow(int width, int height)
{
    if (height*width==0) return;
    glViewport(0,0,width,height);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glOrtho(-10, 10, -10, 10, -10, 10);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    glEnable(GL_DEPTH_TEST);

    //glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);// set the blend mode
    //glEnable(GL_BLEND); //obligatory for blending and transparencies
    glEnable(GL_LINE_SMOOTH);

    //glEnable(GL_CULL_FACE);

    glShadeModel(GL_FLAT);
    //glShadeModel(GL_SMOOTH);
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    PAINTSTRUCT ps;
    HDC hdc;
    static HGLRC hrc;
    static GLfloat xRot = 0.0f;
    static GLfloat yRot = 0.0f;
    static GLfloat pos[3] = { 6.0f, 6.0f, 6.0f };

    switch (message)
    {
    case WM_SIZE:
        ResizeWindow(LOWORD(lParam),HIWORD(lParam));
        break;
    case WM_CREATE:
        hdc = GetDC(hWnd);
        SetMyPixelFormat(hdc);
        hrc = wglCreateContext(hdc);
        wglMakeCurrent(hdc, hrc);
        ReleaseDC(hWnd, hdc);
        break;
    case WM_KEYDOWN:
        if (wParam == VK_UP) xRot -= 5.0f;
        if (wParam == VK_DOWN) xRot += 5.0f;
        if (wParam == VK_LEFT) yRot -= 5.0f;
        if (wParam == VK_RIGHT) yRot += 5.0f;

        if (xRot > 356.0f) xRot = 0.0f;
        if (xRot < -1.0f) xRot = 355.0f;
        if (yRot > 356.0f) yRot = 0.0f;
        if (yRot < -1.0f) yRot = 355.0f;

        if (wParam == 'W') pos[2] -= 0.5f;
        if (wParam == 'S') pos[2] += 0.5f;
        if (wParam == 'A') pos[0] -= 0.5f;
        if (wParam == 'D') pos[0] += 0.5f;
        if (wParam == 'Q') pos[1] -= 0.5f;
        if (wParam == 'E') pos[1] += 0.5f;

        InvalidateRect(hWnd, NULL, FALSE);
        break;
    case WM_PAINT:
        hdc = BeginPaint(hWnd, &ps);
        DrawScene(xRot, yRot, pos);
        SwapBuffers(hdc);
        EndPaint(hWnd, &ps);
        break;
    case WM_ERASEBKGND:
        return 1;
        break;
    case WM_DESTROY:
        wglMakeCurrent(NULL, NULL);
        wglDeleteContext(hrc);
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}
ATOM MyRegisterClass(HINSTANCE hInstance)
{
    WNDCLASSEX wcex;
    wcex.cbSize = sizeof(WNDCLASSEX);
    wcex.style          = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
    wcex.lpfnWndProc    = (WNDPROC)WndProc;
    wcex.cbClsExtra     = 0;
    wcex.cbWndExtra     = 0;
    wcex.hInstance      = hInstance;
    wcex.hIcon          = NULL;
    wcex.hCursor        = LoadCursor(NULL, IDC_ARROW);
    wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1);
    wcex.lpszMenuName   = NULL;
    wcex.lpszClassName  = "Primitives";
    wcex.hIconSm        = NULL;
    return RegisterClassEx(&wcex);
}
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
   HWND hWnd;
   hWnd = CreateWindow("Primitives", "OGL color lab", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);
   if (!hWnd) return FALSE;
   ShowWindow(hWnd, nCmdShow);
   UpdateWindow(hWnd);
   return TRUE;
}
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow)
{
    MSG msg;
    MyRegisterClass(hInstance);
    if (!InitInstance(hInstance, nCmdShow)) return FALSE;
    while (GetMessage(&msg, NULL, 0, 0)) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return (int) msg.wParam;
}