I was doing some major re-editing of my program and I finally managed to get it to "run" which is to say that it goes thru the game loop and even exits BUT it doesn't want to draw anything. Most of my code is based off of nehes examples.
Here is the header file
#ifndef __GAMESTATE_H__
#define __GAMESTATE_H__
#pragma comment(lib, "Glu32.lib")
#pragma comment(lib, "winmm.lib")
#include <windows.h> // Header File For Windows
#include <stdio.h> // Header File For Standard Input/Output
#include <gl\gl.h> // Header File For The OpenGL32 Library
#include <gl\glu.h> // Header File For The GLu32 Library
#include "texture.h" // Header File Containing Our Texture Structure ( NEW )
#include "GameState.h"
#include <vector>
class baseGameState{ //abstract base class so you cant inisiate it by itself
private:
protected:
virtual int render(){return 0;};
virtual int update(){return 0;};
public:
virtual int run(DWORD ElapsedTime, bool keys){return 0;};
bool operator != (baseGameState);
};
class MENU_STATE: public baseGameState{
private: //All of our variables that the update function and render need
GLfloat roll; // Rolling Texture
int selector, max_selector;
GLubyte Ycolor;
GLfloat Width, Height;
GLfloat yOffset;
bool Boolarrow[4]; //0=up
//1=down
//2=left
//3=right
DWORD TimeP[4]; //0=up
//1=down
//2=left
//3=right
Texture texture[2]; // Storage For 2 Textures ( NEW )
bool colordown;
DWORD ElapsedTime;
bool keys[256];
bool change;
protected:
int render();
int update();
public:
MENU_STATE::MENU_STATE();
int run(DWORD TotalElapsedTime){
ElapsedTime=TotalElapsedTime;
update();
render();
return 0;
};
};
class WORLD_STATE: public baseGameState{
private:
protected:
int render();
int update();
public:
int run();
};
class EXIT_STATE: public baseGameState{
private:
protected:
int render(){return 0;};
int update(){return 0;};
public:
int run(){return 0;};
};
#endif
And here is the rest of it in the cpp part
#pragma comment(lib, "Glu32.lib")
#pragma comment(lib, "winmm.lib")
#include <windows.h> // Header File For Windows
#include <stdio.h> // Header File For Standard Input/Output
#include <gl\gl.h> // Header File For The OpenGL32 Library
#include <gl\glu.h> // Header File For The GLu32 Library
#include "texture.h" // Header File Containing Our Texture Structure ( NEW )
#include "GameState.h"
#include <vector>
bool LoadTGA(Texture *, char *); // Function Prototype For LoadTGA ( NEW )
int MENU_STATE::render(){
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear The Screen And The Depth Buffer
glLoadIdentity(); // Reset The Modelview Matrix
glColor3ub(255,255,255);
glBindTexture(GL_TEXTURE_2D, texture[1].texID); // ( CHANGE )
glBegin(GL_QUADS); // Start Drawing Quad
glTexCoord2f(roll+0.0f, 0.0f); glVertex2f(0, 0); // Bottom left
glTexCoord2f(roll+0.0f, 1.0f); glVertex2f(0, Height); // Bottom Right
glTexCoord2f(roll+1.0f, 1.0f); glVertex2f(Width, Height); // Top right
glTexCoord2f(roll+1.0f, 0.0f); glVertex2f(Width, 0); // Top left
glEnd();
glBindTexture(GL_TEXTURE_2D, texture[0].texID); // ( CHANGE )
glBegin(GL_QUADS); // Start Drawing Quads
glTexCoord2f(0.0f, 1.0f); glVertex2f((Width/3), (Height/3)); // Top left
glTexCoord2f(0.0f, 0.0f); glVertex2f((Width/3), (Height*(.8f)) ); // Bottom left
glTexCoord2f(1.0f, 0.0f); glVertex2f(((.6f)*Width), (Height*(.8f)) ); // Bottom right
glTexCoord2f(1.0f, 1.0f); glVertex2f(((.6f)*Width), (Height/3)); // Top right
glEnd();
glLineWidth(2.3f);
glDisable(GL_TEXTURE_2D);
glBegin(GL_LINE_LOOP);
glColor3ub(Ycolor,Ycolor,0); // yellow
glVertex2f((Width/2.55f), (Height/1.68f)+yOffset); // Top left
glVertex2f((Width/2.55f), (Height*(.625f))+yOffset); // Bottom left
glVertex2f(((.535f)*Width), (Height*(.625f))+yOffset); // Bottom right
glVertex2f(((.535f)*Width), (Height/1.68f)+yOffset); // Top right
glEnd();
glEnable(GL_TEXTURE_2D);
return 0;
};
int MENU_STATE::update(){
roll+=0.033f/(ElapsedTime); // Increase Our Texture Roll Variable
if(colordown==true){
Ycolor-=1; //takes one away from Ycolor to make it fade
}
if(colordown==false){
Ycolor+=1; //Adds one to Ycolor to brighten
}
if(Ycolor<=100){ //Makes sure that we don't go too low or too high with the color values
colordown=false;
}
if(Ycolor>=255){
colordown=true;
}
if (roll>1.0f) // Is Roll Greater Than One
{
roll-=1.0f; // Subtract 1 From Roll
}
max_selector=4; //How many options the user has
/* if (keys[VK_UP]) // Is UP arrow Being Pressed?
{
if(Boolarrow[0]==true){ //If it hasn't been pressed recently then immideatly do the actions
yOffset-=.0315f*Height; //Adjusts the value of yOffset so that it fits with the screen
Boolarrow[0]=false; //turns the bool false to note that it has been held
TimeP[0]=timeGetTime(); //gets the current time it was pressed
selector-=1; //subtracts one from the selector
if(selector<0){ //if its lower then 0 then it simply goes to the top of the list
selector=max_selector;
yOffset=0;
for(int Loop=0; Loop!=selector; Loop++){
yOffset+=.0315f*Height;
}
}
}
else{
if(TimeP[0]+500<timeGetTime()){ //Makes sure that a half second passed since the user
//held the button down then moves the selector down
yOffset-=.0315f*Height;
TimeP[0]=timeGetTime();
selector-=1;
if(selector<0){
selector=max_selector;
yOffset=0;
for(int Loop=0; Loop!=selector; Loop++){
yOffset+=.0315f*Height;
}
}
}
}
}
if (!keys[VK_UP]) // Is UP arrow Being Pressed?
{
Boolarrow[0]=true; //resets boolarrow because the user let go of the key
TimeP[0]=0; //resets the time because he isnt pressing the button anymore
}
if (keys[VK_DOWN]) // Is DOWN arrow Being Pressed?
{
if(Boolarrow[1]==true){ //same as vk_UP except goes in the opposite direction
yOffset+=.0315f*Height;
Boolarrow[1]=false;
TimeP[1]=timeGetTime();
selector+=1;
if(selector>max_selector){ //simpler because we can simply reset yoffset to 0
//and dont have to go thru any for loops
selector=0;
yOffset=0;
}
}
else{
if(TimeP[1]+500<timeGetTime()){
yOffset+=.0315f*Height;
TimeP[1]=timeGetTime();
selector+=1;
if(selector>max_selector){
selector=0;
yOffset=0;
}
}
}
}
if (!keys[VK_DOWN]) // Is F1 Being Pressed?
{
Boolarrow[1]=true;
TimeP[1]=0;
}
if (keys[VK_LEFT]) // Is F1 Being Pressed?
{
if(Boolarrow[2]==true){
yOffset-=.0315f*Height;
Boolarrow[2]=false;
TimeP[2]=timeGetTime();
selector-=1;
if(selector<0){
selector=max_selector;
yOffset=0;
for(int Loop=0; Loop!=selector; Loop++){
yOffset+=.0315f*Height;
}
}
}
else{
if(TimeP[2]+500<timeGetTime()){
yOffset-=.0315f*Height;
TimeP[2]=timeGetTime();
selector-=1;
if(selector<0){
selector=max_selector;
yOffset=0;
for(int Loop=0; Loop!=selector; Loop++){
yOffset+=.0315f*Height;
}
}
}
}
}
if (!keys[VK_LEFT]) // Is F1 Being Pressed?
{
Boolarrow[2]=true;
TimeP[2]=0;
}
if (keys[VK_RIGHT]) // Is F1 Being Pressed?
{
if(Boolarrow[3]==true){
yOffset+=.0315f*Height;
Boolarrow[3]=false;
TimeP[3]=timeGetTime();
selector+=1;
if(selector>max_selector){
selector=0;
yOffset=0;
}
}
else{
if(TimeP[3]+500<timeGetTime()){
yOffset+=.0315f*Height;
TimeP[3]=timeGetTime();
selector+=1;
if(selector>max_selector){
selector=0;
yOffset=0;
}
}
}
}
if (!keys[VK_RIGHT]) // Is F1 Being Pressed?
{
Boolarrow[3]=true;
TimeP[3]=0;
}
*/
/* if (keys[VK_RETURN]) // Is F1 Being Pressed?
{
switch(selector){
case 0:{Gamestate=WORLD;
break;}
case 1:{Gamestate=WORLD;
break;}
case 2:{Gamestate=WORLD;
break;}
case 3:{Gamestate=WORLD;
break;}
case 4:{ done=true;
break;}
}
}*/
return 1;
};
MENU_STATE::MENU_STATE(){
int selector=0, max_selector=4;
GLubyte Ycolor = 255;
GLfloat Width=640, Height=480;
GLfloat roll=0; // Rolling Texture
bool colordown=true;
GLfloat yOffset=0;
bool change=false;
int Status=FALSE; // Status Indicator
// Load The Bitmap, Check For Errors.
if (LoadTGA(&texture[0], "Data/Menu_Copy.tga") &&
LoadTGA(&texture[1], "Data/cloud_bg copy.tga"))
{
Status=TRUE;
for (int loop=0; loop<2; loop++) // Loop Through Both Textures
{
// Typical Texture Generation Using Data From The TGA ( CHANGE )
glGenTextures(1, &texture[loop].texID); // Create The Texture ( CHANGE )
glBindTexture(GL_TEXTURE_2D, texture[loop].texID);
glTexImage2D(GL_TEXTURE_2D, 0, texture[loop].bpp / 8, texture[loop].width, texture[loop].height, 0, texture[loop].type, GL_UNSIGNED_BYTE, texture[loop].imageData);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
if (texture[loop].imageData) // If Texture Image Exists ( CHANGE )
{
free(texture[loop].imageData); // Free The Texture Image Memory ( CHANGE )
}
}
}
}
bool baseGameState::operator!= (baseGameState param) {
baseGameState temp;
return (0);
}
Here is the main file, but I don't think that the problem is in this part of the code
// Based On Lesson 6
// =================
//
// All Code Is The Same, Except For Where I Have ( NEW )
// ( CHANGE ) Means I Have Changed The Line For This Tutorial.
#pragma comment(lib, "Glu32.lib")
#pragma comment(lib, "winmm.lib")
#include <windows.h> // Header File For Windows
#include <stdio.h> // Header File For Standard Input/Output
#include <gl\gl.h> // Header File For The OpenGL32 Library
#include <gl\glu.h> // Header File For The GLu32 Library
#include "texture.h" // Header File Containing Our Texture Structure ( NEW )
#include "GameState.h"
#include <vector>
bool LoadTGA(Texture *, char *); // Function Prototype For LoadTGA ( NEW )
HDC hDC=NULL; // Private GDI Device Context
HGLRC hRC=NULL; // Permanent Rendering Context
HWND hWnd=NULL; // Holds Our Window Handle
HINSTANCE hInstance; // Holds The Instance Of The Application
DWORD ElapsedTime;
bool keys[256]; // Array Used For The Keyboard Routine
bool active=TRUE; // Window Active Flag Set To TRUE By Default
bool fullscreen=TRUE; // Fullscreen Flag Set To Fullscreen Mode By Default
//Texture texture[2]; // Storage For 2 Textures ( NEW )
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); // Declaration For WndProc
/*int LoadGLTextures() // Load Bitmaps And Convert To Textures
{
int Status=FALSE; // Status Indicator
// Load The Bitmap, Check For Errors.
if (LoadTGA(&texture[0], "Data/Menu_Copy.tga") &&
LoadTGA(&texture[1], "Data/cloud_bg copy.tga"))
{
Status=TRUE; // Set The Status To TRUE
for (int loop=0; loop<2; loop++) // Loop Through Both Textures
{
// Typical Texture Generation Using Data From The TGA ( CHANGE )
glGenTextures(1, &texture[loop].texID); // Create The Texture ( CHANGE )
glBindTexture(GL_TEXTURE_2D, texture[loop].texID);
glTexImage2D(GL_TEXTURE_2D, 0, texture[loop].bpp / 8, texture[loop].width, texture[loop].height, 0, texture[loop].type, GL_UNSIGNED_BYTE, texture[loop].imageData);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
if (texture[loop].imageData) // If Texture Image Exists ( CHANGE )
{
free(texture[loop].imageData); // Free The Texture Image Memory ( CHANGE )
}
}
}
return Status; // Return The Status
}*/
GLvoid ReSizeGLScene(GLsizei width, GLsizei height) // Resize And Initialize The GL Window
{
if (height==0) // Prevent A Divide By Zero By
{
height=1; // Making Height Equal One
}
glViewport(0,0,width,height); // Reset The Current Viewport
glMatrixMode(GL_PROJECTION); // Select The Projection Matrix
glLoadIdentity(); // Reset The Projection Matrix
glOrtho(0.0f,width,height,0.0f,-1.0f,1.0f); // Create Ortho 640x480 View (0,0 At Top Left)
glMatrixMode(GL_MODELVIEW); // Select The Modelview Matrix
glLoadIdentity(); // Reset The Modelview Matrix
/* Width=width; //Get the width and put it into a global variable
Height=height; //Get the height and put it into a global variable so that drawing functions can use it
if(selector!=0){ //Makes sure that when the user resizes the screen that the selector bar moves along
yOffset=0; //resets it to 0 so that we can just use the for loop to find the correct position
for(int Loop=0; Loop!=selector; Loop++){
yOffset+=.0315f*Height;
}
}*/
}
int InitGL(GLvoid) // All Setup For OpenGL Goes Here
{
/* if (!LoadGLTextures()) // Jump To Texture Loading Routine
{
return FALSE; // If Texture Didn't Load Return FALSE
}*/
glClearColor(0.0f, 0.0f, 0.0f, 0.0f); // Clear The Background Color To Black
glClearDepth(1.0); // Enables Clearing Of The Depth Buffer
glDepthFunc(GL_LEQUAL); // The Type Of Depth Test To Do
glShadeModel(GL_SMOOTH); // Enables Smooth Color Shading
glEnable(GL_TEXTURE_2D); // Enable 2D Texture Mapping
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); // Enable Alpha Blending (disable alpha testing)
glEnable(GL_BLEND); // Enable Blending (disable alpha testing)
return TRUE; // Initialization Went OK
}
GLvoid KillGLWindow(GLvoid) // Properly Kill The Window
{
if (fullscreen) // Are We In Fullscreen Mode?
{
ChangeDisplaySettings(NULL,0); // If So Switch Back To The Desktop
ShowCursor(TRUE); // Show Mouse Pointer
}
if (hRC) // Do We Have A Rendering Context?
{
if (!wglMakeCurrent(NULL,NULL)) // Are We Able To Release The DC And RC Contexts?
{
MessageBox(NULL,"Release Of DC And RC Failed.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
}
if (!wglDeleteContext(hRC)) // Are We Able To Delete The RC?
{
MessageBox(NULL,"Release Rendering Context Failed.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
}
hRC=NULL; // Set RC To NULL
}
if (hDC && !ReleaseDC(hWnd,hDC)) // Are We Able To Release The DC
{
MessageBox(NULL,"Release Device Context Failed.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
hDC=NULL; // Set DC To NULL
}
if (hWnd && !DestroyWindow(hWnd)) // Are We Able To Destroy The Window?
{
MessageBox(NULL,"Could Not Release hWnd.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
hWnd=NULL; // Set hWnd To NULL
}
if (!UnregisterClass("OpenGL",hInstance)) // Are We Able To Unregister Class
{
MessageBox(NULL,"Could Not Unregister Class.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
hInstance=NULL; // Set hInstance To NULL
}
}
/* This Code Creates Our OpenGL Window. Parameters Are: *
* title - Title To Appear At The Top Of The Window *
* width - Width Of The GL Window Or Fullscreen Mode *
* height - Height Of The GL Window Or Fullscreen Mode *
* bits - Number Of Bits To Use For Color (8/16/24/32) *
* fullscreenflag - Use Fullscreen Mode (TRUE) Or Windowed Mode (FALSE) */
BOOL CreateGLWindow(char* title, int width, int height, int bits, bool fullscreenflag)
{
GLuint PixelFormat; // Holds The Results After Searching For A Match
WNDCLASS wc; // Windows Class Structure
DWORD dwExStyle; // Window Extended Style
DWORD dwStyle; // Window Style
RECT WindowRect; // Grabs Rectangle Upper Left / Lower Right Values
WindowRect.left=(long)0; // Set Left Value To 0
WindowRect.right=(long)width; // Set Right Value To Requested Width
WindowRect.top=(long)0; // Set Top Value To 0
WindowRect.bottom=(long)height; // Set Bottom Value To Requested Height
fullscreen=fullscreenflag; // Set The Global Fullscreen Flag
hInstance = GetModuleHandle(NULL); // Grab An Instance For Our Window
wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; // Redraw On Size, And Own DC For Window.
wc.lpfnWndProc = (WNDPROC) WndProc; // WndProc Handles Messages
wc.cbClsExtra = 0; // No Extra Window Data
wc.cbWndExtra = 0; // No Extra Window Data
wc.hInstance = hInstance; // Set The Instance
wc.hIcon = LoadIcon(NULL, IDI_WINLOGO); // Load The Default Icon
wc.hCursor = LoadCursor(NULL, IDC_ARROW); // Load The Arrow Pointer
wc.hbrBackground = NULL; // No Background Required For GL
wc.lpszMenuName = NULL; // We Don't Want A Menu
wc.lpszClassName = "OpenGL"; // Set The Class Name
if (!RegisterClass(&wc)) // Attempt To Register The Window Class
{
MessageBox(NULL,"Failed To Register The Window Class.","ERROR",MB_OK|MB_ICONEXCLAMATION);
return FALSE; // Return FALSE
}
if (fullscreen) // Attempt Fullscreen Mode?
{
DEVMODE dmScreenSettings; // Device Mode
memset(&dmScreenSettings,0,sizeof(dmScreenSettings)); // Makes Sure Memory's Cleared
dmScreenSettings.dmSize=sizeof(dmScreenSettings); // Size Of The Devmode Structure
dmScreenSettings.dmPelsWidth = width; // Selected Screen Width
dmScreenSettings.dmPelsHeight = height; // Selected Screen Height
dmScreenSettings.dmBitsPerPel = bits; // Selected Bits Per Pixel
dmScreenSettings.dmFields=DM_BITSPERPEL|DM_PELSWIDTH|DM_PELSHEIGHT;
// Try To Set Selected Mode And Get Results. NOTE: CDS_FULLSCREEN Gets Rid Of Start Bar.
if (ChangeDisplaySettings(&dmScreenSettings,CDS_FULLSCREEN)!=DISP_CHANGE_SUCCESSFUL)
{
// If The Mode Fails, Offer Two Options. Quit Or Use Windowed Mode.
if (MessageBox(NULL,"The Requested Fullscreen Mode Is Not Supported By\nYour Video Card. Use Windowed Mode Instead?","NeHe GL",MB_YESNO|MB_ICONEXCLAMATION)==IDYES)
{
fullscreen=FALSE; // Windowed Mode Selected. Fullscreen = FALSE
}
else
{
// Pop Up A Message Box Letting User Know The Program Is Closing.
MessageBox(NULL,"Program Will Now Close.","ERROR",MB_OK|MB_ICONSTOP);
return FALSE; // Return FALSE
}
}
}
if (fullscreen) // Are We Still In Fullscreen Mode?
{
dwExStyle=WS_EX_APPWINDOW; // Window Extended Style
dwStyle=WS_POPUP; // Windows Style
ShowCursor(FALSE); // Hide Mouse Pointer
}
else
{
dwExStyle=WS_EX_APPWINDOW | WS_EX_WINDOWEDGE; // Window Extended Style
dwStyle=WS_OVERLAPPEDWINDOW; // Windows Style
}
AdjustWindowRectEx(&WindowRect, dwStyle, FALSE, dwExStyle); // Adjust Window To True Requested Size
// Create The Window
if (!(hWnd=CreateWindowEx( dwExStyle, // Extended Style For The Window
"OpenGL", // Class Name
title, // Window Title
dwStyle | // Defined Window Style
WS_CLIPSIBLINGS | // Required Window Style
WS_CLIPCHILDREN, // Required Window Style
0, 0, // Window Position
WindowRect.right-WindowRect.left, // Calculate Window Width
WindowRect.bottom-WindowRect.top, // Calculate Window Height
NULL, // No Parent Window
NULL, // No Menu
hInstance, // Instance
NULL))) // Dont Pass Anything To WM_CREATE
{
KillGLWindow(); // Reset The Display
MessageBox(NULL,"Window Creation Error.","ERROR",MB_OK|MB_ICONEXCLAMATION);
return FALSE; // Return FALSE
}
static PIXELFORMATDESCRIPTOR pfd= // pfd Tells Windows How We Want Things To Be
{
sizeof(PIXELFORMATDESCRIPTOR), // Size Of This Pixel Format Descriptor
1, // Version Number
PFD_DRAW_TO_WINDOW | // Format Must Support Window
PFD_SUPPORT_OPENGL | // Format Must Support OpenGL
PFD_DOUBLEBUFFER, // Must Support Double Buffering
PFD_TYPE_RGBA, // Request An RGBA Format
bits, // Select Our Color Depth
0, 0, 0, 0, 0, 0, // Color Bits Ignored
0, // No Alpha Buffer
0, // Shift Bit Ignored
0, // No Accumulation Buffer
0, 0, 0, 0, // Accumulation Bits Ignored
16, // 16Bit Z-Buffer (Depth Buffer)
0, // No Stencil Buffer
0, // No Auxiliary Buffer
PFD_MAIN_PLANE, // Main Drawing Layer
0, // Reserved
0, 0, 0 // Layer Masks Ignored
};
if (!(hDC=GetDC(hWnd))) // Did We Get A Device Context?
{
KillGLWindow(); // Reset The Display
MessageBox(NULL,"Can't Create A GL Device Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
return FALSE; // Return FALSE
}
if (!(PixelFormat=ChoosePixelFormat(hDC,&pfd))) // Did Windows Find A Matching Pixel Format?
{
KillGLWindow(); // Reset The Display
MessageBox(NULL,"Can't Find A Suitable PixelFormat.","ERROR",MB_OK|MB_ICONEXCLAMATION);
return FALSE; // Return FALSE
}
if(!SetPixelFormat(hDC,PixelFormat,&pfd)) // Are We Able To Set The Pixel Format?
{
KillGLWindow(); // Reset The Display
MessageBox(NULL,"Can't Set The PixelFormat.","ERROR",MB_OK|MB_ICONEXCLAMATION);
return FALSE; // Return FALSE
}
if (!(hRC=wglCreateContext(hDC))) // Are We Able To Get A Rendering Context?
{
KillGLWindow(); // Reset The Display
MessageBox(NULL,"Can't Create A GL Rendering Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
return FALSE; // Return FALSE
}
if(!wglMakeCurrent(hDC,hRC)) // Try To Activate The Rendering Context
{
KillGLWindow(); // Reset The Display
MessageBox(NULL,"Can't Activate The GL Rendering Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
return FALSE; // Return FALSE
}
ShowWindow(hWnd,SW_SHOW); // Show The Window
SetForegroundWindow(hWnd); // Slightly Higher Priority
SetFocus(hWnd); // Sets Keyboard Focus To The Window
ReSizeGLScene(width, height); // Set Up Our Perspective GL Screen
if (!InitGL()) // Initialize Our Newly Created GL Window
{
KillGLWindow(); // Reset The Display
MessageBox(NULL,"Initialization Failed.","ERROR",MB_OK|MB_ICONEXCLAMATION);
return FALSE; // Return FALSE
}
return TRUE; // Success
}
LRESULT CALLBACK WndProc( HWND hWnd, // Handle For This Window
UINT uMsg, // Message For This Window
WPARAM wParam, // Additional Message Information
LPARAM lParam) // Additional Message Information
{
switch (uMsg) // Check For Windows Messages
{
case WM_ACTIVATE: // Watch For Window Activate Message
{
if (!HIWORD(wParam)) // Check Minimization State
{
active=TRUE; // Program Is Active
}
else
{
active=FALSE; // Program Is No Longer Active
}
return 0; // Return To The Message Loop
}
case WM_SYSCOMMAND: // Intercept System Commands
{
switch (wParam) // Check System Calls
{
case SC_SCREENSAVE: // Screensaver Trying To Start?
case SC_MONITORPOWER: // Monitor Trying To Enter Powersave?
return 0; // Prevent From Happening
}
break; // Exit
}
case WM_CLOSE: // Did We Receive A Close Message?
{
PostQuitMessage(0); // Send A Quit Message
return 0; // Jump Back
}
case WM_KEYDOWN: // Is A Key Being Held Down?
{
keys[wParam] = TRUE; // If So, Mark It As TRUE
return 0; // Jump Back
}
case WM_KEYUP: // Has A Key Been Released?
{
keys[wParam] = FALSE; // If So, Mark It As FALSE
return 0; // Jump Back
}
case WM_SIZE: // Resize The OpenGL Window
{
ReSizeGLScene(LOWORD(lParam),HIWORD(lParam)); // LoWord=Width, HiWord=Height
return 0; // Jump Back
}
}
// Pass All Unhandled Messages To DefWindowProc
return DefWindowProc(hWnd,uMsg,wParam,lParam);
}
int WINAPI WinMain( HINSTANCE hInstance, // Instance
HINSTANCE hPrevInstance, // Previous Instance
LPSTR lpCmdLine, // Command Line Parameters
int nCmdShow) // Window Show State
{
MSG msg; // Windows Message Structure
const DWORD DesiredFrameLength = 33; // ~30 FPS
BOOL done=FALSE; // Bool Variable To Exit Loop
std::vector<baseGameState*> States;
States.push_back(new MENU_STATE);
EXIT_STATE * exit =new EXIT_STATE;
MENU_STATE menu;
// Ask The User Which Screen Mode They Prefer
if (MessageBox(NULL,"Would You Like To Run In Fullscreen Mode?", "Start FullScreen?",MB_YESNO|MB_ICONQUESTION)==IDNO)
{
fullscreen=FALSE; // Windowed Mode
}
// Create Our OpenGL Window
if (!CreateGLWindow("NeHe & Evan 'terminate' Pipho's TGA Loading Tutorial",640,480,16,fullscreen))
{
return 0; // Quit If Window Was Not Created
}
DWORD StartTime = timeGetTime();
DWORD LastTime = StartTime;
while(done!=TRUE) // Loop That Runs While done=FALSE
{
if (PeekMessage(&msg,NULL,0,0,PM_REMOVE)) // Is There A Message Waiting?
{
if (msg.message==WM_QUIT) // Have We Received A Quit Message?
{
done=TRUE; // If So done=TRUE
}
else // If Not, Deal With Window Messages
{
TranslateMessage(&msg); // Translate The Message
DispatchMessage(&msg); // Dispatch The Message
}
}
else // If There Are No Messages
{
ElapsedTime = timeGetTime()- LastTime;
if(ElapsedTime < DesiredFrameLength)
{
Sleep(DesiredFrameLength - ElapsedTime);
ElapsedTime = DesiredFrameLength;
}
LastTime = timeGetTime();
// Draw The Scene. Watch For ESC Key And Quit Messages From DrawGLScene()
if ((active && menu.run(ElapsedTime)) || keys[VK_ESCAPE]) // Active? Was There A Quit Received?
{
done=TRUE; // ESC or DrawGLScene Signalled A Quit
}
else // Not Time To Quit, Update Screen
{
SwapBuffers(hDC); // Swap Buffers (Double Buffering)
}
if (keys[VK_F1]) // Is F1 Being Pressed?
{
keys[VK_F1]=FALSE; // If So Make Key FALSE
KillGLWindow(); // Kill Our Current Window
fullscreen=!fullscreen; // Toggle Fullscreen / Windowed Mode
// Recreate Our OpenGL Window
if (!CreateGLWindow("NeHe & Evan 'terminate' Pipho's TGA Loading Tutorial",640,480,16,fullscreen))
{
return 0; // Quit If Window Was Not Created
}
}
}
}
// Shutdown
KillGLWindow(); // Kill The Window
return (msg.wParam); // Exit The Program
}
So why doesn't it draw anything?
