As you can see, this is a Ray-Casting engine that loads a map of 0s and 1s from a text file. However, if ANY spot past 20x20 map units is visible to the player, the engine freezes. Any help?Code:#include <windows.h> #include <math.h> #include <fstream.h> #pragma resource "icon.res" #define ID_TEXTURE 1000 #define ID_ICON 100 #define PI 3.14159265358979323846 CONST float SizeMult = 1.7; CONST double DegreeChange = 60.0/(320.0 * SizeMult); CONST int DistanceToProjection = 277; CONST int MoveSpeed = 30; CONST int LagMult = 10; CONST int MouseSensitivity = 2; HDC bufferDC; HDC Image; HDC hDC; HINSTANCE DLL = LoadLibrary("Images"); HBITMAP Texture = (HBITMAP)LoadBitmap(DLL, MAKEINTRESOURCE(ID_TEXTURE)); HBITMAP Buffer; HPEN BluePen = CreatePen(PS_SOLID, 0, RGB(0 ,0, 255)); HPEN GrayPen = CreatePen(PS_SOLID, 0, RGB(117, 117, 117)); UINT Timer; HDC hdc; PAINTSTRUCT Ps; double y = -30; double PlayerVerticalAngle = 0; double PlayerX = 256.0; double PlayerY = 256.0; double distance1; double degrees; double height; int WindowsStatus = 1; int PlayerAngle = 45; int BitmapColumn; int MidPoint; int temp1; int temp2; POINT NewMouse; POINT OldMouse; POINT Center; int map[100][100]; double Distance(double, double, double, int *, int *); void LoadMap(char *); HWND hWnd; const char ClsName[] = "Ray-Casting Test"; const char WindowCaption[] = "3d World - Made by EDITED"; LRESULT CALLBACK WndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam); INT WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { MSG Msg; WNDCLASSEX WndClsEx; WndClsEx.cbSize = sizeof(WNDCLASSEX); WndClsEx.style = CS_HREDRAW | CS_VREDRAW; WndClsEx.lpfnWndProc = WndProc; WndClsEx.cbClsExtra = NULL; WndClsEx.cbWndExtra = NULL; WndClsEx.hInstance = hInstance; WndClsEx.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(ID_ICON)); WndClsEx.hCursor = LoadCursor(NULL, IDC_ARROW); WndClsEx.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); WndClsEx.lpszMenuName = NULL; WndClsEx.lpszClassName = ClsName; WndClsEx.hIconSm = LoadIcon(hInstance, MAKEINTRESOURCE(ID_ICON)); RegisterClassEx(&WndClsEx); hWnd = CreateWindowEx(WS_EX_OVERLAPPEDWINDOW, ClsName, WindowCaption, WS_OVERLAPPEDWINDOW, 100, 120, 320 * SizeMult, 200 * SizeMult, NULL, NULL, hInstance, NULL); ShowWindow(hWnd, nCmdShow); UpdateWindow(hWnd); FreeLibrary(DLL); while( GetMessage(&Msg, NULL, 0, 0) ) { TranslateMessage(&Msg); DispatchMessage(&Msg); } return Msg.wParam; } LRESULT CALLBACK WndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam) { if (WindowsStatus == 1) { switch (Msg) { case WM_CREATE: { bufferDC = CreateCompatibleDC(GetDC(hWnd)); Buffer = CreateCompatibleBitmap(GetDC(hWnd), 320 * SizeMult, 200 * SizeMult); SelectObject(bufferDC, Buffer); DeleteObject(Buffer); Image = CreateCompatibleDC(GetDC(hWnd)); Timer = SetTimer(hWnd, 105, 10, TIMERPROC(NULL)); GetCursorPos(&OldMouse); Center.x = 160 * SizeMult; Center.y = 160 * SizeMult; ClientToScreen(hWnd, &Center); ShowCursor(0); LoadMap("map.txt"); return 0; } case WM_PAINT: { hDC = BeginPaint(hWnd, &Ps); y = -30; for (int i = 0; i <= (320 * SizeMult); i++) { distance1 = Distance(PlayerAngle + y, PlayerX, PlayerY, &BitmapColumn, &MidPoint); distance1 = distance1 * cos(y*PI/180); degrees = atan(64.0/distance1) / PI * 180; height = tan(degrees*PI/180) * DistanceToProjection; SelectObject(bufferDC, GrayPen); MoveToEx(bufferDC, i, 0, NULL); LineTo(bufferDC, i, MidPoint - height); SelectObject(Image, Texture); StretchBlt(bufferDC, i, MidPoint - height, 1, height * 2, Image, BitmapColumn - 1, 0, 1, 64, SRCCOPY); SelectObject(bufferDC, BluePen); MoveToEx(bufferDC, i, MidPoint + height, NULL); LineTo(bufferDC, i, (200 * SizeMult)); y = y + DegreeChange; } BitBlt( hDC, 0, 0, 320 * SizeMult, 200 * SizeMult, bufferDC, 0, 0, SRCCOPY ); break; } case WM_TIMER: { GetCursorPos(&NewMouse); int i = 0; if (OldMouse.y > NewMouse.y) { if (PlayerVerticalAngle <= 19) { PlayerVerticalAngle = PlayerVerticalAngle + (OldMouse.y - NewMouse.y)/MouseSensitivity; i = 1; } } else if (OldMouse.y < NewMouse.y) { if (PlayerVerticalAngle >= -19) { PlayerVerticalAngle = PlayerVerticalAngle - (NewMouse.y - OldMouse.y)/MouseSensitivity; i = 1; } } if (OldMouse.x > NewMouse.x) { PlayerAngle = PlayerAngle - (OldMouse.x - NewMouse.x)/MouseSensitivity; if (PlayerAngle < 0) PlayerAngle = PlayerAngle + 360; i = 1; } else if (OldMouse.x < NewMouse.x) { PlayerAngle = PlayerAngle + (NewMouse.x - OldMouse.x)/MouseSensitivity; if (PlayerAngle > 360) PlayerAngle = PlayerAngle - 360; i = 1; } if((GetAsyncKeyState(87)) || (GetAsyncKeyState(VK_UP))) { int a = 0; double X; double Y; for (int y = 1; y <= MoveSpeed; y++) { X = PlayerX + cos(PlayerAngle*PI/180) * y; Y = PlayerY - sin(PlayerAngle*PI/180) * y; temp1 = floor(X/64); temp2 = floor(Y/64); if (map[temp1][temp2] == 1) a = 1; } if (a != 1) { PlayerX = X; PlayerY = Y; i = 1; } } if ((GetAsyncKeyState(83)) || (GetAsyncKeyState(VK_DOWN))) { int a = 0; double X; double Y; for (int y = 1; y <= MoveSpeed; y++) { X = PlayerX - cos(PlayerAngle*PI/180) * y; Y = PlayerY + sin(PlayerAngle*PI/180) * y; temp1 = floor(X/64); temp2 = floor(Y/64); if (map[temp1][temp2] == 1) { a = 1; y = MoveSpeed + 1; } } if (a != 1) { PlayerX = X; PlayerY = Y; i = 1; } } if (GetAsyncKeyState(65)) { int a = 0; double X; double Y; for (int y = 1; y <= MoveSpeed - 5; y++) { X = PlayerX - cos((PlayerAngle + 90)*PI/180) * y; Y = PlayerY + sin((PlayerAngle + 90)*PI/180) * y; temp1 = floor(X/64); temp2 = floor(Y/64); if (map[temp1][temp2] == 1) { a = 1; y = MoveSpeed + 1; } } if (a != 1) { PlayerX = X; PlayerY = Y; i = 1; } } if (GetAsyncKeyState(68)) { int a = 0; double X; double Y; for (int y = 1; y <= MoveSpeed - 5; y++) { X = PlayerX + cos((PlayerAngle + 90)*PI/180) * y; Y = PlayerY - sin((PlayerAngle + 90)*PI/180) * y; temp1 = floor(X/64); temp2 = floor(Y/64); if (map[temp1][temp2] == 1) { a = 1; y = MoveSpeed + 1; } } if (a != 1) { PlayerX = X; PlayerY = Y; i = 1; } } if (i == 1) { i = 0; InvalidateRect(hWnd, 0, 0); UpdateWindow(hWnd); } if ((NewMouse.x <= 1) || (NewMouse.x >= Center.x + 300)) { SetCursorPos(Center.x, Center.y); NewMouse.x = Center.x; NewMouse.y = Center.y; } OldMouse.x = NewMouse.x; OldMouse.y = NewMouse.y; break; } case WM_DESTROY: { ShowCursor(1); DeleteObject(BluePen); DeleteObject(GrayPen); DeleteDC(Image); DeleteDC(bufferDC); ReleaseDC(hWnd, hDC); PostQuitMessage(WM_QUIT); } default: return DefWindowProc(hWnd, Msg, wParam, lParam); } } } double Distance(double Angle, double PlayerX, double PlayerY, int *Bitmap, int *MidPoint) { double DistanceChange = 1; double Distance = 0; double X = PlayerX; double Y = PlayerY; int i = 0; int mode = 0; int XCord; int YCord; double XChange = cos(Angle*PI/180) * 1; double YChange = sin(Angle*PI/180) * 1; while (i == 0) { if (mode == 0) { Distance = Distance + (DistanceChange * LagMult); X = X + (XChange * LagMult); Y = Y - (YChange * LagMult); } else { Distance = Distance + DistanceChange; X = X + XChange; Y = Y - YChange; } XCord = floor(X/64); YCord = floor(Y/64); if (map[XCord][YCord] == 1) if (mode == 0) { Distance = (Distance - DistanceChange * LagMult); X = X - (XChange * LagMult); Y = Y + (YChange * LagMult); mode = 1; } else i = 1; } if (PlayerX > X) X = ceil(X); else X = floor(X); if (PlayerY > Y) Y = ceil(Y); else Y = floor(Y); if (floor(X/64) == X/64) { while (Y > 64) Y = Y - 64; *Bitmap = Y; } if (floor(Y/64) == Y/64) { while (X > 64) X = X - 64; *Bitmap = X; } if (PlayerVerticalAngle == 0) *MidPoint = (100 * SizeMult); else if (PlayerVerticalAngle > 0) *MidPoint = (100 * SizeMult) + (tan(PlayerVerticalAngle*PI/180) * 277); else if (PlayerVerticalAngle < 0) *MidPoint = (100 * SizeMult) + (tan(PlayerVerticalAngle*PI/180) * 277); return Distance; } void LoadMap(char *filename) { char mapholder[100][100]; ifstream input_file(filename); for (int i = 0; i <= 19; i++) { input_file.getline(mapholder[i], sizeof(map[i])); } for (int i = 0; i <= 19; i++) { for (int y = 0; y <= 19; y++) { switch (mapholder[i][y]) { case '1': map[i][y] = 1; break; case '0': map[i][y] = 0; break; } } } input_file.close(); }
