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Run-Time Check Failure #2 - Stack around the variable 'str' was corrupted.
I will be honest, I do not understand what is wrong, I think maybe I put a piece of code in the wrong position?
Here is the code, any help you can give will be deeply appreciated. Thank you for your time.
/*
main.cpp
simple OpenGL demo
*/
#include <windows.h> // must include this for windows programs
#include <stdio.h>
#include "resource.h"
#include <gl/gl.h>
#include <gl/glu.h>
#include "CGfxOpenGL.h"
#define KEY_DOWN(vk_code) ((GetAsyncKeyState(vk_code) & 0x8000) ? 1 : 0)
// Global variables to store dialog and picture box window handles
HWND HOutput = NULL; // handle to the output control
HWND HSample = NULL;
HWND HDialog = NULL; // handle to the main dialog window
bool Exiting = false;
long WindowWidth;
long WindowHeight;
long WindowBits = 32;
bool Fullscreen = false;
float ObjPosX = 0.0;
float ObjVelX = 0.0;
CGfxOpenGL *g_glRender = NULL;
bool Wireframe = true;
// current camera settings
int PosX = 0;
int PosY = 10;
int PosZ = 50;
int LookX = 0;
int LookY = 0;
int LookZ = 0;
int TransOffset = 50;
int Roll = 0;
int FOV = 45; // range 20..100??
Vertex3F SphereCenter;
int MouseX = 0;
int MouseY = 0;
void SetupPixelFormat(HDC hDC)
{
int pixelFormat;
PIXELFORMATDESCRIPTOR pfd =
{
sizeof(PIXELFORMATDESCRIPTOR), // size
1, // version
PFD_SUPPORT_OPENGL | // OpenGL window
PFD_DRAW_TO_WINDOW | // render to window
PFD_DOUBLEBUFFER, // support double-buffering
PFD_TYPE_RGBA, // color type
32, // prefered color depth
0, 0, 0, 0, 0, 0, // color bits (ignored)
0, // no alpha buffer
0, // alpha bits (ignored)
0, // no accumulation buffer
0, 0, 0, 0, // accum bits (ignored)
16, // depth buffer
0, // no stencil buffer
0, // no auxiliary buffers
PFD_MAIN_PLANE, // main layer
0, // reserved
0, 0, 0, // no layer, visible, damage masks
};
pixelFormat = ChoosePixelFormat(hDC, &pfd);
SetPixelFormat(hDC, pixelFormat, &pfd);
}
/*
DialogProc
this is the window event handler for the main dialog
*/
BOOL CALLBACK DialogProc (HWND hwnd,
UINT message,
WPARAM wParam,
LPARAM lParam)
{
static HDC hDC;
static HGLRC hRC;
HWND hCtrl;
int ctrlID;
int pos, min, max;
RECT rect;
HBRUSH brush;
int x, y;
// switch based on message type
switch(message)
{
case WM_LBUTTONDOWN:
// get the mouse position
x = LOWORD(lParam);
y = HIWORD(lParam);
break;
case WM_INITDIALOG:
// dialog is initializing –
// store the picture box handle in a global variable for later
HOutput = GetDlgItem(hwnd, IDC_PICTURE_OUTPUT);
hDC = GetDC(HOutput);
// initialize the rgb and hsv scroll bars
hCtrl = GetDlgItem(hwnd, IDC_SCROLLBAR_POSX);
SetScrollRange(hCtrl, SB_CTL, 0, 100, true);
SetScrollPos(hCtrl, SB_CTL, PosX + TransOffset, true);
SetDlgItemInt(hwnd, IDC_STATIC_POSX, PosX, true);
hCtrl = GetDlgItem(hwnd, IDC_SCROLLBAR_POSY);
SetScrollRange(hCtrl, SB_CTL, 0, 100, true);
SetScrollPos(hCtrl, SB_CTL, PosY + TransOffset, true);
SetDlgItemInt(hwnd, IDC_STATIC_POSY, PosY, true);
hCtrl = GetDlgItem(hwnd, IDC_SCROLLBAR_POSZ);
SetScrollRange(hCtrl, SB_CTL, 1, 100, true);
SetScrollPos(hCtrl, SB_CTL, PosZ, true);
SetDlgItemInt(hwnd, IDC_STATIC_POSZ, PosZ, true);
hCtrl = GetDlgItem(hwnd, IDC_SCROLLBAR_LOOKX);
SetScrollRange(hCtrl, SB_CTL, 0, 100, true);
SetScrollPos(hCtrl, SB_CTL, LookX + TransOffset, true);
SetDlgItemInt(hwnd, IDC_STATIC_LOOKX, LookX, true);
hCtrl = GetDlgItem(hwnd, IDC_SCROLLBAR_LOOKY);
SetScrollRange(hCtrl, SB_CTL, 0, 100, true);
SetScrollPos(hCtrl, SB_CTL, LookY + TransOffset, true);
SetDlgItemInt(hwnd, IDC_STATIC_LOOKY, LookY, true);
hCtrl = GetDlgItem(hwnd, IDC_SCROLLBAR_LOOKZ);
SetScrollRange(hCtrl, SB_CTL, 0, 100, true);
SetScrollPos(hCtrl, SB_CTL, LookZ + TransOffset, true);
SetDlgItemInt(hwnd, IDC_STATIC_LOOKZ, LookZ, true);
hCtrl = GetDlgItem(hwnd, IDC_SCROLLBAR_ROLL);
SetScrollRange(hCtrl, SB_CTL, 0, 360, true);
SetScrollPos(hCtrl, SB_CTL, Roll, true);
SetDlgItemInt(hwnd, IDC_STATIC_ROLL, Roll, true);
hCtrl = GetDlgItem(hwnd, IDC_SCROLLBAR_FOV);
SetScrollRange(hCtrl, SB_CTL, 10, 120, true);
SetScrollPos(hCtrl, SB_CTL, FOV, true);
SetDlgItemInt(hwnd, IDC_STATIC_FOV, FOV, true);
// set up the opengl render window
SetupPixelFormat(hDC);
hRC = wglCreateContext(hDC);
wglMakeCurrent(hDC, hRC);
break;
case WM_TIMER:
ObjPosX = ObjPosX = ObjPosX + (20.0/1000.0) * ObjVelX; //add code to position based on formula
//xnew = xold + dt*velocity
//Be sure to use the same time as set up in SetTimer:
//dt=20.0/1000.0
char str[32];
sprintf(str, "%s <%.2f %.2f %.2f>", "Joe Eggemeyer", ObjPosX, 0.0F, 0.0F); //don't make your name too long
SetWindowText(HDialog, str);
break;
case WM_DESTROY: // window destroy
case WM_QUIT:
case WM_CLOSE: // windows is closing
// deselect rendering context and delete it
wglMakeCurrent(hDC, NULL);
wglDeleteContext(hRC);
// send WM_QUIT to message queue
PostQuitMessage(0);
break;
case WM_HSCROLL:
// one of the scroll bars has moved
// update the scroll bars
hCtrl = (HWND)lParam;
ctrlID = GetWindowLong(hCtrl, GWL_ID);
pos = GetScrollPos(hCtrl, SB_CTL);
GetScrollRange(hCtrl, SB_CTL, &min, &max);
switch(LOWORD(wParam)) {
case SB_LINEUP:
case SB_PAGEUP:
pos -= 1;
pos = MAX(pos, min);
break;
case SB_LINEDOWN:
case SB_PAGEDOWN:
pos += 1;
pos = MIN(pos, max);
break;
case SB_THUMBPOSITION:
case SB_THUMBTRACK:
pos = HIWORD(wParam);
break;
}
SetScrollPos(hCtrl, SB_CTL, pos, true);
switch(ctrlID) {
case IDC_SCROLLBAR_DX:
PosX = GetScrollPos(hCtrl, SB_CTL);
PosX -= TransOffset;
SetDlgItemInt(hwnd, IDC_STATIC_POSX, PosX, true);
break;
case IDC_SCROLLBAR_DY:
PosY = GetScrollPos(hCtrl, SB_CTL);
PosY -= TransOffset;
SetDlgItemInt(hwnd, IDC_STATIC_POSY, PosY, true);
break;
case IDC_SCROLLBAR_DZ:
PosZ = GetScrollPos(hCtrl, SB_CTL);
SetDlgItemInt(hwnd, IDC_STATIC_POSZ, PosZ, true);
break;
case IDC_SCROLLBAR_LOOKX:
LookX = GetScrollPos(hCtrl, SB_CTL);
LookX -= TransOffset;
SetDlgItemInt(hwnd, IDC_STATIC_LOOKX, LookX, true);
break;
case IDC_SCROLLBAR_LOOKY:
LookY = GetScrollPos(hCtrl, SB_CTL);
LookY -= TransOffset;
SetDlgItemInt(hwnd, IDC_STATIC_LOOKY, LookY, true);
break;
case IDC_SCROLLBAR_LOOKZ:
LookZ = GetScrollPos(hCtrl, SB_CTL);
LookZ -= TransOffset;
SetDlgItemInt(hwnd, IDC_STATIC_LOOKZ, LookZ, true);
break;
case IDC_SCROLLBAR_ROLL:
Roll = GetScrollPos(hCtrl, SB_CTL);
SetDlgItemInt(hwnd, IDC_STATIC_ROLL, Roll, true);
break;
case IDC_SCROLLBAR_FOV:
FOV = GetScrollPos(hCtrl, SB_CTL);
SetDlgItemInt(hwnd, IDC_STATIC_SCALE, FOV, true);
break;
}
// render opengl stuff
g_glRender->Prepare(0.0f);
g_glRender->Render();
SwapBuffers(hDC);
break;
/* no buttons used in this application
case WM_COMMAND:
// the WM_COMMAND message is for button presses among other things
// decide which command or button was activated
switch(LOWORD(wParam))
{
case IDC_BUTTON_DRAW:
// our draw button was pressed
Height += 1;
if (Height > MaxConeHt) {
Height = MaxConeHt;
}
break;
case IDC_BUTTON_CLEAR:
// our draw button was pressed
Height -= 1;
if (Height < MinConeHt) {
Height = MinConeHt;
}
break;
case IDC_BUTTON_QUIT:
case IDCANCEL:
// end the program if title bar X is pressed or other cancel message received
// deselect rendering context and delete it
wglMakeCurrent(hDC, NULL);
wglDeleteContext(hRC);
// posting a quit message will end our windows application
PostQuitMessage(0);
break;
}
break;
/* */
}
return FALSE;
}
// this is the main function that starts the application
int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, char * cmdParam, int cmdShow)
{
HDC hDC;
RECT rect;
g_glRender = new CGfxOpenGL;
// create the main window
// store its handle in a global if needed
HDialog = CreateDialog (GetModuleHandle(NULL),
MAKEINTRESOURCE(IDD_DIALOG1),
0,
DialogProc);
// make the dialog visible
ShowWindow(HDialog, SW_SHOW);
SetFocus(NULL);
hDC = GetDC(HOutput);
g_glRender->Init();
GetClientRect(HOutput, &rect);
WindowWidth = rect.right - rect.left;
WindowHeight = rect.bottom - rect.top;
g_glRender->SetupProjection(WindowWidth, WindowHeight);
SetTimer(HDialog, 1, 20, NULL); //20 milliseconds
// standard windows message loop
MSG msg;
while (!Exiting)
{
// render opengl stuff
g_glRender->Prepare(0.0f);
g_glRender->Render();
SwapBuffers(hDC);
if (KEY_DOWN(VK_RIGHT)) {
ObjVelX = ObjVelX + 0.1f;; //Add you own code to update the object’s horizontal velocity
//so that when the right key is pressed the velocity increases
//i.e., it goes faster and faster
}
if (KEY_DOWN(VK_LEFT)) {
ObjVelX = ObjVelX - 0.1f;; //Add you own code to update the object’s horizontal velocity
//so that when the left key is pressed the velocity increases
//i.e., it goes faster and faster
}
// handle window message stuff
if (PeekMessage (&msg, NULL, 0, 0, PM_NOREMOVE))
{
if (!GetMessage (&msg, NULL, 0, 0))
{
Exiting = true;
break;
}
// avoid processing messages for the dialog
if (!IsDialogMessage (HDialog, & msg))
{
TranslateMessage ( & msg );
DispatchMessage ( & msg );
}
}
}
return (int)(msg.wParam);
}
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