I already have windows.h included I’ll show you the code… see if you can make it work
in Gltest.cpp:
#define WIN32_LEAN_AND_MEAN
#define WIN32_EXTRA_LEAN
#include <windows.h>
#include <gl/gl.h>
#include <gl/glu.h>
#include “CGfxOpenGL.h”
bool exiting = false;
long windowW = 800;
long windowH = 600;
long windowBits = 32;
bool fullscreen = false;
HDC hDC;
CGfxOpenGL *g_glRender = NULL;
void SetupPixelFormat (HDC hDC)
{
int pixelFormat;
PIXELFORMATDESCRIPTOR pdf =
{
sizeof(PIXELFORMATDESCRIPTOR),
1,
PFD_SUPPORT_OPENGL |
PFD_DRAW_TO_WINDOW |
PFD_DOUBLEBUFFER,
PFD_TYPE_RGBA,
32,
0, 0, 0, 0, 0, 0,
0,
0,
0,
0, 0, 0, 0,
16,
0,
0,
PFD_MAIN_PLANE,
0,
0, 0, 0,
};
pixelFormat = ChoosePixelFormat(hDC, &pdf);
SetPixelFormat(hDC, pixelFormat, &pdf);
}
LRESULT CALLBACK MainWindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
static HDC hDC;
static HGLRC hRC;
int height, width;
switch (uMsg)
{
case WM_CREATE:
hDC = GetDC(hWnd);
SetupPixelFormat(hDC);
hRC = wglCreateContext(hDC);
wglMakeCurrent(hDC, hRC);
break;
case WM_DESTROY:
case WM_QUIT:
case WM_CLOSE:
wglMakeCurrent(hDC, NULL);
wglDeleteContext(hRC);
PostQuitMessage(0);
break;
case WM_SIZE:
height = HIWORD(lParam);
width = LOWORD(lParam);
g_glRender->SetupProjection(width, height);
break;
case WM_ACTIVATEAPP:
break;
case WM_PAINT: // paint
PAINTSTRUCT ps;
BeginPaint(hWnd, &ps);
EndPaint(hWnd, &ps);
break;
case WM_LBUTTONDOWN: // left mouse button
break;
case WM_RBUTTONDOWN: // right mouse button
break;
case WM_MOUSEMOVE: // mouse movement
break;
case WM_LBUTTONUP: // left button release
break;
case WM_RBUTTONUP: // right button release
break;
case WM_KEYUP:
break;
case WM_KEYDOWN:
int fwKeys;
LPARAM keyData;
fwKeys = (int)wParam;
keyData = lParam;
switch(fwKeys)
{
case VK_ESCAPE:
PostQuitMessage(0);
break;
default:
break;
}
break;
default:
break;
}
return DefWindowProc(hWnd, uMsg, wParam, lParam);
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
{
WNDCLASSEX windowClass;
HWND hwnd;
MSG msg;
DWORD dwExStyle;
DWORD dwStyle;
RECT windowRect;
g_glRender = new CGfxOpenGL;
windowRect.left=(long)0;
windowRect.right=(long)windowW;
windowRect.top=(long)0;
windowRect.bottom=(long)windowH;
windowClass.cbSize = sizeof(WNDCLASSEX);
windowClass.style = CS_HREDRAW | CS_VREDRAW;
windowClass.lpfnWndProc = MainWindowProc;
windowClass.cbClsExtra = 0;
windowClass.cbWndExtra = 0;
windowClass.hInstance = hInstance;
windowClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
windowClass.hCursor = LoadCursor(NULL, IDC_ARROW);
windowClass.hbrBackground = NULL;
windowClass.lpszMenuName = NULL;
windowClass.lpszClassName = "GLClass";
windowClass.hIconSm = LoadIcon(NULL, IDI_WINLOGO);
if(!RegisterClassEx(&windowClass))
return 0;
if(fullscreen)
{
DEVMODE dmScreenSettings;
memset(&dmScreenSettings, 0, sizeof(dmScreenSettings));
dmScreenSettings.dmSize = sizeof(dmScreenSettings);
dmScreenSettings.dmPelsWidth = windowW;
dmScreenSettings.dmPelsHeight = windowH;
dmScreenSettings.dmBitsPerPel = windowBits;
dmScreenSettings.dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT;
if(ChangeDisplaySettings(&dmScreenSettings, CDS_FULLSCREEN) != DISP_CHANGE_SUCCESSFUL)
{
MessageBox(NULL, "Display Mode Failed", NULL, MB_OK);
fullscreen = FALSE;
}
}
if (fullscreen)
{
dwExStyle = WS_EX_APPWINDOW;
dwStyle = WS_POPUP;
ShowCursor(FALSE);
}
else
{
dwExStyle = WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;
dwStyle = WS_OVERLAPPEDWINDOW;
}
AdjustWindowRectEx(&windowRect, dwStyle, FALSE, dwExStyle);
hwnd = CreateWindowEx(NULL,
"GLClass",
"BOGLGP - Chapter 2 - Open GL Application",
dwStyle | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
0, 0,
windowRect.right - windowRect.left,
windowRect.bottom - windowRect.top,
NULL,
NULL,
hInstance,
NULL);
hDC = GetDC(hwnd);
if (!hwnd)
return 0;
ShowWindow(hwnd, SW_SHOW);
UpdateWindow(hwnd);
g_glRender->Init();
while (!exiting)
{
g_glRender->Prepare(0.0f);
g_glRender->Render();
SwapBuffers(hDC);
while (PeekMessage (&msg, NULL, 0, 0, PM_NOREMOVE))
{
if (!GetMessage (&msg, NULL, 0, 0))
{
exiting = true;
break;
}
TranslateMessage (&msg);
DispatchMessage (&msg);
}
}
delete g_glRender;
if (fullscreen)
{
ChangeDisplaySettings(NULL, 0);
ShowCursor(TRUE);
}
return (int)msg.wParam;
}
in CGfxOpenGL.cpp:
#ifdef _WINDOWS
#include <windows.h>
#endif
#include <gl/gl.h>
#include <gl/glu.h>
#include <math.h>
#include “CGfxOpenGL.h”
// disable implicit float-double casting
#pragma warning(disable:4305)
CGfxOpenGL::CGfxOpenGL()
{
}
CGfxOpenGL::~CGfxOpenGL()
{
}
bool CGfxOpenGL::Init()
{
// clear to black background
glClearColor(0.0, 0.0, 0.0, 0.0);
m_angle = 0.0f;
return true;
}
bool CGfxOpenGL::Shutdown()
{
return true;
}
void CGfxOpenGL::SetupProjection(int width, int height)
{
if (height == 0) // don’t want a divide by zero
{
height = 1;
}
glViewport(0, 0, width, height); // reset the viewport to new dimensions
glMatrixMode(GL_PROJECTION); // set projection matrix current matrix
glLoadIdentity(); // reset projection matrix
// calculate aspect ratio of window
gluPerspective(52.0f,(GLfloat)width/(GLfloat)height,1.0f,1000.0f);
glMatrixMode(GL_MODELVIEW); // set modelview matrix
glLoadIdentity(); // reset modelview matrix
m_windowWidth = width;
m_windowHeight = height;
}
void CGfxOpenGL::Prepare(float dt)
{
m_angle += 0.1f;
}
void CGfxOpenGL::Render()
{
// clear screen and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
// move back 5 units and rotate about all 3 axes
glTranslatef(0.0, 0.0, -5.0f);
glRotatef(m_angle, 1.0f, 0.0f, 0.0f);
glRotatef(m_angle, 0.0f, 1.0f, 0.0f);
glRotatef(m_angle, 0.0f, 0.0f, 1.0f);
// lime greenish color
glColor3f(0.7f, 1.0f, 0.3f);
// draw the triangle such that the rotation point is in the center
glBegin(GL_TRIANGLES);
glVertex3f(1.0f, -1.0f, 0.0f);
glVertex3f(-1.0f, -1.0f, 0.0f);
glVertex3f(0.0f, 1.0f, 0.0f);
glEnd();
}
in CGfxOpenGL.h:
#ifndef __GL_COMPONENT
#define __GL_COMPONENT
#define PI 3.14159
#define TWO_PI PI*2.0
#define HALF_PI PI/2.0
class CGfxOpenGL
{
private:
int m_windowWidth;
int m_windowHeight;
float m_angle;
public:
CGfxOpenGL();
virtual ~CGfxOpenGL();
bool Init();
bool Shutdown();
void SetupProjection(int width, int height);
void Prepare(float dt);
void Render();
};
#endif