//----The include files-------------------------------------
#include <GLMain.h>
//----The veriabols-----------------------------------------
HDC hDC=NULL;
HGLRC hRC=NULL;
HWND hWnd=NULL;
HINSTANCE hInstance;
bool keys[256];
bool active=TRUE;
bool fullscreen=TRUE;
bool light;
bool lp;
#define MAP_SIZEX 10
#define MAP_SIZEY 10
GLfloat x;
GLfloat y;
GLuint loop;
GLuint texture[2];
GLfloat LightAmbient[]= { 0.5f, 0.5f, 0.5f, 1.0f };
GLfloat LightDiffuse[]= { 1.0f, 1.0f, 1.0f, 1.0f };
GLfloat LightPosition[]= { 0.0f, 0.0f, 2.0f, 1.0f };
char map[10] [10] = {
{1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
{1, 0, 0, 0, 0, 0, 0, 0, 0, 1},
{1, 0, 0, 0, 0, 0, 0, 0, 0, 1},
{1, 0, 0, 0, 0, 0, 0, 0, 0, 1},
{1, 0, 0, 0, 0, 0, 0, 0, 0, 1},
{1, 0, 0, 0, 0, 0, 0, 0, 0, 1},
{1, 0, 0, 0, 0, 0, 0, 0, 0, 1},
{1, 0, 0, 0, 0, 0, 0, 0, 0, 1},
{1, 0, 0, 0, 0, 0, 0, 0, 0, 1},
{1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
};
//----The functions-----------------------------------------
//----This Function Loads and Reads Texture Data
AUX_RGBImageRec *LoadBMP(char *Filename) // Loads A Bitmap Image
{
FILE *File=NULL; // File Handle
if (!Filename) // Make Sure A Filename Was Given
{
return NULL; // If Not Return NULL
}
File=fopen(Filename,"r"); // Check To See If The File Exists
if (File) // Does The File Exist?
{
fclose(File); // Close The Handle
return auxDIBImageLoad(Filename); // Load The Bitmap And Return A Pointer
}
return NULL; // If Load Failed Return NULL
}
//----This Function loads the bitmap into Texture Data
int LoadGLTextures() // Load Bitmaps And Convert To Textures
{
int Status=FALSE; // Status Indicator
AUX_RGBImageRec *TextureImage[2]; // Create Storage Space For The Texture
memset(TextureImage,0,sizeof(void *)*1); // Set The Pointer To NULL
// Load The Bitmap, Check For Errors, If Bitmap''s Not Found Quit
if ((TextureImage[0]=LoadBMP("Data/glass.bmp")) &&
(TextureImage[1]=LoadBMP("Data/Land.bmp")))
{
Status=TRUE; // Set The Status To TRUE
glGenTextures(2, &texture[0]); // Create Three Textures
for (loop=0; loop<2; loop++)
{
glBindTexture(GL_TEXTURE_2D, texture[loop]);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);
gluBuild2DMipmaps(GL_TEXTURE_2D, 3, TextureImage[loop]->sizeX, TextureImage[loop]->sizeY, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[loop]->data);
}
}
for (loop=0; loop<2; loop++)
{
if (TextureImage[loop]) // If Texture Exists
{
if (TextureImage[loop]->data) // If Texture Image Exists
{
free(TextureImage[loop]->data); // Free The Texture Image Memory
}
free(TextureImage[loop]);
}
}
return Status; // Return The Status
}
//----This function is for windowed mode mostly-------------
//----But it is called at least once in startup for fullscreen mode
GLvoid ReSizeGLScene(GLsizei width, GLsizei height)
{
if (height==0)
{
height=1;
}
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,0.1f,100.0f);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
//----This one is for OpenGL initlization--------------------
int InitGL(GLvoid)
{
if (!LoadGLTextures())
{
return FALSE;
}
gluLookAt(10.0f, 8.0f, 20.0f, 10.0f, 8.0f, 0.0f, 0.0f, 1.0f, 0.0f);
glClearColor(0.0f, 0.0f, 0.0f, 0.0f); // Clear The Background Color To Black
glClearDepth(1.0); // Enables Clearing Of The Depth Buffer
glEnable(GL_DEPTH_TEST); // Enable Depth Testing
glShadeModel(GL_SMOOTH); // Enables Smooth Color Shading
glEnable(GL_TEXTURE_2D); // Enable 2D Texture Mapping
return TRUE;
}
//----And here is where we get to do all of are drawing------
int DrawGLScene(GLvoid)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
//glEnable(GL_BLEND);// Enable Blending
//glDisable(GL_DEPTH_TEST);
/*glBlendFunc(GL_DST_COLOR,GL_ZERO);
glBindTexture(GL_TEXTURE_2D, texture[0]);
glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f); glVertex3f(-50.0f, 50.0f, 0.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f( 50.0f, 50.0f, 0.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f( 50.0f,-50.0f, 0.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f(-50.0f,-50.0f, 0.0f);
glEnd();
glBlendFunc(GL_ONE, GL_ONE);
glBindTexture(GL_TEXTURE_2D, texture[1]);
glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f); glVertex3f(-50.0f, 50.0f, 0.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f( 50.0f, 50.0f, 0.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f( 50.0f,-50.0f, 0.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f(-50.0f,-50.0f, 0.0f);
glEnd();*/
return TRUE;
}
GLvoid KillGLWindow(GLvoid)
{
if (fullscreen)
{
ChangeDisplaySettings(NULL,0);
ShowCursor(TRUE);
}
if (hRC)
{
if (!wglMakeCurrent(NULL,NULL))
{
MessageBox(NULL,"Release of DC and RC Failed","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
}
if (!wglDeleteContext(hRC))
{
MessageBox(NULL,"Could not Delete Rendering Context","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
}
hRC=NULL;
}
if (hDC && !ReleaseDC(hWnd,hDC))
{
MessageBox(NULL,"Could not Delete Device Context","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
}
if (hWnd && !DestroyWindow(hWnd))
{
MessageBox(NULL,"Could not Delete hWnd","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
hWnd=NULL;
}
if (!UnregisterClass("OpenGL",hInstance))
{
MessageBox(NULL,"Could not Unregister Class","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
hInstance=NULL;
}
}
BOOL CreateGLWindow(char* title, int width, int height, int bits, bool fullscreenflag)
{
GLuint PixelFormat;
WNDCLASS wc;
DWORD dwExStyle;
DWORD dwStyle;
RECT WindowRect;
WindowRect.left=(long)0;
WindowRect.right=(long)width;
WindowRect.top=(long)0;
WindowRect.bottom=(long)height;
fullscreen=fullscreenflag;
hInstance = GetModuleHandle(NULL);
wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
wc.lpfnWndProc = (WNDPROC) WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon(NULL, IDI_WINLOGO);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = NULL;
wc.lpszMenuName = NULL;
wc.lpszClassName = "OpenGL";
if (!RegisterClass(&wc))
{
MessageBox(NULL,"Failed to Register the Window Class","ERROR",MB_OK | MB_ICONEXCLAMATION);
return FALSE;
}
if (fullscreen)
{
DEVMODE dmScreenSettings;
memset(&dmScreenSettings,0,sizeof(dmScreenSettings));
dmScreenSettings.dmSize=sizeof(dmScreenSettings);
dmScreenSettings.dmPelsWidth = width;
dmScreenSettings.dmPelsHeight = height;
dmScreenSettings.dmBitsPerPel = bits;
dmScreenSettings.dmFields=DM_BITSPERPEL|DM_PELSWIDTH|DM_PELSHEIGHT;
if (ChangeDisplaySettings(&dmScreenSettings,CDS_FULLSCREEN)!=DISP_CHANGE_SUCCESSFUL)
{
if (MessageBox(NULL,"The Requested Video Mode is not Supported By\nYour Video Card. Use Windowed Mode Instead?","OpenGL ERROR",MB_YESNO | MB_ICONEXCLAMATION)==IDYES)
{
fullscreen=FALSE;
}
else
{
MessageBox(NULL,"Program Will Now Close","ERROR",MB_OK | MB_ICONSTOP);
return 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);
if (!(hWnd=CreateWindowEx( dwExStyle,
"OpenGL",
title,
WS_CLIPSIBLINGS |
WS_CLIPCHILDREN |
dwStyle,
0, 0,
WindowRect.right-WindowRect.left,
WindowRect.bottom-WindowRect.top,
NULL,
NULL,
hInstance,
NULL)))
{
KillGLWindow();
MessageBox(NULL,"Window Creation Error","ERROR",MB_OK | MB_ICONEXCLAMATION);
return FALSE;
}
static PIXELFORMATDESCRIPTOR pfd=
{
sizeof(PIXELFORMATDESCRIPTOR),
1,
PFD_DRAW_TO_WINDOW |
PFD_SUPPORT_OPENGL |
PFD_DOUBLEBUFFER,
PFD_TYPE_RGBA,
bits,
0, 0, 0, 0, 0, 0,
0,
0,
0,
0, 0, 0, 0,
16,
0,
0,
PFD_MAIN_PLANE,
0,
0, 0, 0
};
if (!(hDC=GetDC(hWnd)))
{
KillGLWindow();
MessageBox(NULL,"Can''t Create A GL Device Context","ERROR",MB_OK | MB_ICONEXCLAMATION);
return FALSE;
}
if (!(PixelFormat=ChoosePixelFormat(hDC,&pfd)))
{
KillGLWindow();
MessageBox(NULL,"Can''t Find A Suitable PixelFormat.","ERROR",MB_OK | MB_ICONEXCLAMATION);
return FALSE;
}
if(!SetPixelFormat(hDC, PixelFormat, &pfd))
{
KillGLWindow();
MessageBox(NULL,"Can''t Set The PixelFormat.","ERROR",MB_OK | MB_ICONEXCLAMATION);
return FALSE;
}
if (!(hRC=wglCreateContext(hDC)))
{
KillGLWindow();
MessageBox(NULL,"Can''t Create A GL Rendering Context.","ERROR",MB_OK | MB_ICONEXCLAMATION);
return FALSE;
}
if (!wglMakeCurrent(hDC,hRC))
{
KillGLWindow();
MessageBox(NULL,"Can''t Activate The GL Rendering Context.","ERROR",MB_OK | MB_ICONEXCLAMATION);
return FALSE;
}
ShowWindow(hWnd,SW_SHOW);
SetForegroundWindow(hWnd);
SetFocus(hWnd);
ReSizeGLScene(width, height);
if(!InitGL())
{
KillGLWindow();
MessageBox(NULL,"Initialization Failed.","ERROR",MB_OK | MB_ICONEXCLAMATION);
return FALSE;
}
return TRUE;
}
LRESULT CALLBACK WndProc( HWND hWnd,
UINT uMsg,
WPARAM wParam,
LPARAM lParam)
{
switch (uMsg)
{
case WM_ACTIVATE:
{
if (!HIWORD(wParam))
{
active=TRUE;
}
else
{
active=FALSE;
}
return 0;
}
case WM_SYSCOMMAND:
{
switch (wParam)
{
case SC_SCREENSAVE:
case SC_MONITORPOWER:
return 0;
}
break;
}
case WM_CLOSE:
{
PostQuitMessage(0);
return 0;
}
case WM_KEYDOWN:
{
keys[wParam] = TRUE;
return 0;
}
case WM_KEYUP:
{
keys[wParam] = FALSE;
return 0;
}
case WM_SIZE:
{
ReSizeGLScene(LOWORD(lParam), HIWORD(lParam));
return 0;
}
}
return DefWindowProc(hWnd, uMsg, wParam, lParam);
}
int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nShowCmd)
{
MSG msg;
BOOL done=FALSE;
if (MessageBox(NULL,"Would You Like to Run in Fullscreen Mode?","Fullscreen Options",MB_YESNO | MB_ICONQUESTION)==IDNO)
{
fullscreen=FALSE;
}
if (!CreateGLWindow("Raja''s OpenGL Framework",640,480,16,fullscreen))
{
return 0;
}
while(!done)
{
if (PeekMessage(&msg,NULL,0,0,PM_REMOVE))
{
if (msg.message==WM_QUIT)
{
done=TRUE;
}
else
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
else
{
if (active)
{
if (keys[VK_ESCAPE])
{
done=TRUE;
}
else
{
DrawGLScene();
SwapBuffers(hDC);
if (keys[''L''] && !lp)
{
lp=TRUE;
light=!light;
if (!light)
{
glDisable(GL_LIGHTING);
}
else
{
glEnable(GL_LIGHTING);
}
}
if (!keys[''L''])
{
lp=FALSE;
}
if (keys[VK_UP])
{
y-=1.0f;
}
if (keys[VK_DOWN])
{
y+=1.0f;
}
if (keys[VK_RIGHT])
{
x+=1.0f;
}
if (keys[VK_LEFT])
{
x-=1.0f;
}
}
}
if (keys[VK_F1])
{
keys[VK_F1]=FALSE;
KillGLWindow();
fullscreen=!fullscreen;
if (!CreateGLWindow("Raja''s OpenGL Framework",640,480,16,fullscreen))
{
return 0;
}
}
}
}
//Time for shutdown :()
KillGLWindow();
return(msg.wParam);
}
[source]
Thanks Help with Tiling?
Author
i need some help with getting this code to work and im haveing a load of trouble
when i run the program nothing shows up?
this is for tiling
Sir Darkan Fireblade
quote:Original post by Darkan_Fireblade
i need some help with getting this code to work and im haveing a load of trouble
when i run the program nothing shows up?
It really depends on what you mean by ''nothing shows up''. Is the window drawn, but there is no OpenGL rendering? Does absolutly nothing show and you get warnings during compilation?
Regards,
Mathematix.
I got the code compiling and stuff showing on the screen. However, before I go any further...
[flippant]Of course you see nothing! You''ve commented out the code in the DrawGLScene function[/flippant]
LOL, couldn''t resist
Anyway, obvious bits out the way first. To begin with I declared the usual bumpf about window.h and so on (which I''ll assume is in your header file) and prototyped WndProc.
Then, when I first ran it, I got an exception about the textures, so I created the two into a ''data'' subdirectory named appropriately.
Those are the obvious bits out of the way, just in case you were having problems there (which I doubt).
Now, here''s a replacement for your DrawGLScene which shows something:
Two points to note there: first, the main reason you weren''t seeing anything at all is the coordinates you gave. You had a *huge* quad at z=0, which doesn''t fit well with your selected viewing position and direction. I reduced the size of the shape and moved it further away from the view (the negative z value there).
Also, if you don''t disable the depth testing with glDisable(GL_DEPTH_TEST) then you won''t see anything either.
Alimonster
"If anyone can show me, and prove to me, that I am wrong in thought or deed, I will gladly change. I seek the truth, which never yet hurt anybody. It is only persistence in self-delusion and ignorance which does harm." -- Marcus Aurelius
[flippant]Of course you see nothing! You''ve commented out the code in the DrawGLScene function[/flippant]
LOL, couldn''t resist
Anyway, obvious bits out the way first. To begin with I declared the usual bumpf about window.h and so on (which I''ll assume is in your header file) and prototyped WndProc.
Then, when I first ran it, I got an exception about the textures, so I created the two into a ''data'' subdirectory named appropriately.
Those are the obvious bits out of the way, just in case you were having problems there (which I doubt).
Now, here''s a replacement for your DrawGLScene which shows something:
int DrawGLScene(GLvoid){ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); glEnable(GL_BLEND);// Enable Blending glDisable(GL_DEPTH_TEST); glBlendFunc(GL_DST_COLOR,GL_ZERO); glBindTexture(GL_TEXTURE_2D, texture[0]); glBegin(GL_QUADS); glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 1.0f, -4.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, 1.0f, -4.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f,-1.0f, -4.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f,-1.0f, -4.0f); glEnd(); glBlendFunc(GL_ONE, GL_ONE); glBindTexture(GL_TEXTURE_2D, texture[1]); glBegin(GL_QUADS); glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 1.0f, -4.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, 1.0f, -4.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f,-1.0f, -4.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f,-1.0f, -4.0f); glEnd(); return TRUE;} Two points to note there: first, the main reason you weren''t seeing anything at all is the coordinates you gave. You had a *huge* quad at z=0, which doesn''t fit well with your selected viewing position and direction. I reduced the size of the shape and moved it further away from the view (the negative z value there).
Also, if you don''t disable the depth testing with glDisable(GL_DEPTH_TEST) then you won''t see anything either.
Alimonster
"If anyone can show me, and prove to me, that I am wrong in thought or deed, I will gladly change. I seek the truth, which never yet hurt anybody. It is only persistence in self-delusion and ignorance which does harm." -- Marcus Aurelius
This topic is closed to new replies.
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