Я начинаю осваивать OPENGL. Написал небольшую прогу, которая почти ничего не далает, но... :
Но при повороте в центре да и в других частях пространства, поворачивается сцена в центре начала запуска программы, но я бы хотел бы чтобы центр поворота была текущяя координата. Так же дело состоит и с шагом, когда в центре коридора повернутся на некоторое кол-во градусов, далее попробовать пройтись вперед, все двигается не прямо, а как бы передвигаясь немного в бок.
Подскажите, что сделать, пожалуйста.
Код:
program DOOM5;
uses
Forms,
Windows,
Messages,
OpenGL;
{$R *.res}
const
WND_TITLE = 'OpenGL';
FPS_TIMER = 1;
FPS_INTERVAL = 1;
FPS_INTERVAL_HOD = 1;
var
h_Wnd : HWND;
h_DC : HDC;
h_RC : HGLRC;
keys : Array[0..255] of Boolean;
FPSCount : Integer = 0;
ElapsedTime : Integer;
povor: GLfloat;
dviz: GLfloat;
shag_d: GLfloat;
shag_p: GLfloat;
procedure glBindTexture(target: GLenum; texture: GLuint); stdcall; external opengl32;
function IntToStr(Num : Integer) : String;
begin
Str(Num, result);
end;
Procedure Dvizhenie;
Begin
dviz:=dviz+shag_d;
End;
Procedure Povorot;
Begin
povor:=povor+shag_p;
End;
procedure glDraw();
begin
glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
// пол
glTranslatef(0,0.0,dviz);
glRotatef(povor,0.0,1.0,0.0);
glBegin(GL_QUADS);
glColor3f(0.85,0.4,1.0);
glVertex3f(-5.0, -2.0,0.0); // Слева вверху
glColor3f(0.85,0.4,1.0);
glVertex3f(1.0, -2.0, 0.0); // Справа вверху
glColor3f(0.85,0.4,1.0);
glVertex3f(1.0, -2.0, -25.0); // Справа внизу
glColor3f(0.85,0.4,1.0);
glVertex3f(-5.0, -2.0, -25.0); // Слева внизу
glEnd();
// стенки
glBegin(GL_QUADS);
glColor3f(0.85,0.4,0.0);
glVertex3f(1.0, -2.0, 0.0); // Слева вверху
glColor3f(0.85,0.4,0.0);
glVertex3f(1.0, -2.0, -25.0); // Справа вверху
glColor3f(0.85,0.4,0.0);
glVertex3f(1.0, 2.0, -25.0); // Справа внизу
glColor3f(0.85,0.4,0.0);
glVertex3f(1.0, 2.0, 0.0); // Слева внизу
glEnd();
glBegin(GL_QUADS);
glColor3f(0.85,0.4,0.0);
glVertex3f(-5.0, -2.0, 0.0); // Слева вверху
glColor3f(0.85,0.4,0.0);
glVertex3f(-5.0, -2.0, -25.0); // Справа вверху
glColor3f(0.85,0.4,0.0);
glVertex3f(-5.0, 2.0, -25.0); // Справа внизу
glColor3f(0.85,0.4,0.0);
glVertex3f(-5.0, 2.0, 0.0); // Слева внизу
glEnd();
// потолок
glBegin(GL_QUADS);
glColor3f(0.85,0.0,0.0);
glVertex3f(1.0, 2.0, -25.0); // Справа внизу
glColor3f(0.85,0.0,0.0);
glVertex3f(1.0, 2.0, 0.0); // Слева внизу
glColor3f(0.85,0.0,0.0);
glVertex3f(-5.0, 2.0, 0.0); // Слева внизу
glColor3f(0.85,0.0,0.0);
glVertex3f(-5.0, 2.0, -25.0); // Справа внизу
glEnd();
end;
procedure glInit();
begin
glClearColor(0.0, 0.0, 0.0, 0.0);
glShadeModel(GL_SMOOTH);
glClearDepth(1.0);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
end;
procedure glResizeWnd(Width, Height : Integer);
begin
if (Height = 0) then
Height := 1;
glViewport(0, 0, Width, Height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0, Width/Height, 1.0, 100.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
end;
function WndProc(hWnd: HWND; Msg: UINT; wParam: WPARAM; lParam: LPARAM):
LRESULT; stdcall;
begin
case (Msg) of
WM_CREATE:
begin
shag_d:=0;
shag_p:=0;
end;
WM_CLOSE:
begin
PostQuitMessage(0);
Result := 0
end;
WM_KEYDOWN:
begin
keys[wParam] := True;
if wParam = VK_ESCAPE then PostQuitMessage(0);
if wParam = 40 then shag_d:=-0.3;
if wParam = 38 then shag_d:=0.3;
if wParam = 37 then shag_p:=-0.5;
if wParam = 39 then shag_p:=0.5;
{if wParam = 40 then dviz:=dviz-0.3;
if wParam = 38 then dviz:=dviz+0.3;
if wParam = 37 then povor:=povor-0.5;
if wParam = 39 then povor:=povor+0.5;}
Result := 0;
end;
WM_KEYUP:
begin
keys[wParam] := False;
if wParam = 40 then shag_d:=0;
if wParam = 38 then shag_d:=0;
if wParam = 37 then shag_p:=0;
if wParam = 39 then shag_p:=0;
Result := 0;
end;
WM_SIZE:
begin
glResizeWnd(LOWORD(lParam),HIWORD(lParam));
Result := 0;
end;
WM_TIMER :
begin
if wParam = FPS_TIMER then
begin
//FPSCount :=Round(FPSCount * 1000/FPS_INTERVAL);
//SetWindowText(h_Wnd, PChar(WND_TITLE + ' [' + intToStr(FPSCount) + ' FPS]'));
dvizhenie;
povorot;
//FPSCount := 0;
Result := 0;
end;
end;
else
Result := DefWindowProc(hWnd, Msg, wParam, lParam);
end;
end;
procedure glKillWnd(Fullscreen : Boolean);
begin
if Fullscreen then
begin
ChangeDisplaySettings(devmode(nil^), 0);
ShowCursor(True);
end;
if (not wglMakeCurrent(h_DC, 0)) then
MessageBox(0, 'Release of DC and RC failed!', 'Error',
MB_OK or MB_ICONERROR);
if (not wglDeleteContext(h_RC)) then
begin
MessageBox(0, 'Release of rendering context failed!', 'Error',
MB_OK or MB_ICONERROR);
h_RC := 0;
end;
if ((h_DC > 0) and (ReleaseDC(h_Wnd, h_DC) = 0)) then
begin
MessageBox(0, 'Release of device context failed!', 'Error',
MB_OK or MB_ICONERROR);
h_DC := 0;
end;
if ((h_Wnd <> 0) and (not DestroyWindow(h_Wnd))) then
begin
MessageBox(0, 'Unable to destroy window!', 'Error',
MB_OK or MB_ICONERROR);
h_Wnd := 0;
end;
if (not UnRegisterClass('OpenGL', hInstance)) then
begin
MessageBox(0, 'Unable to unregister window class!', 'Error',
MB_OK or MB_ICONERROR);
hInstance := 0;
end;
end;
function glCreateWnd(Width, Height : Integer; Fullscreen : Boolean;
PixelDepth : Integer) : Boolean;
var
wndClass : TWndClass;
dwStyle : DWORD;
dwExStyle : DWORD;
dmScreenSettings : DEVMODE;
PixelFormat : GLuint;
h_Instance : HINST;
pfd : TPIXELFORMATDESCRIPTOR;
begin
h_Instance := GetModuleHandle(nil);
ZeroMemory(@wndClass, SizeOf(wndClass));
with wndClass do
begin
style := CS_HREDRAW or
CS_VREDRAW or
CS_OWNDC;
lpfnWndProc := @WndProc;
hInstance := h_Instance;
hCursor := LoadCursor(0, IDC_ARROW);
lpszClassName := 'OpenGL';
end;
if (RegisterClass(wndClass) = 0) then
begin
MessageBox(0, 'Failed to register the window class!', 'Error',
MB_OK or MB_ICONERROR);
Result := False;
Exit
end;
if Fullscreen then
begin
ZeroMemory(@dmScreenSettings, SizeOf(dmScreenSettings));
with dmScreenSettings do begin
dmSize := SizeOf(dmScreenSettings);
dmPelsWidth := Width;
dmPelsHeight := Height;
dmBitsPerPel := PixelDepth;
dmFields := DM_PELSWIDTH or DM_PELSHEIGHT or DM_BITSPERPEL;
end;
if (ChangeDisplaySettings(dmScreenSettings, CDS_FULLSCREEN)
= DISP_CHANGE_FAILED) then
begin
MessageBox(0, 'Unable to switch to fullscreen!', 'Error',
MB_OK or MB_ICONERROR);
Fullscreen := False;
end;
end;
if (Fullscreen) then
begin
dwStyle := WS_POPUP or
WS_CLIPCHILDREN
or WS_CLIPSIBLINGS;
dwExStyle := WS_EX_APPWINDOW;
ShowCursor(False);
end
else
begin
dwStyle := WS_OVERLAPPEDWINDOW or
WS_CLIPCHILDREN or
WS_CLIPSIBLINGS;
dwExStyle := WS_EX_APPWINDOW or
WS_EX_WINDOWEDGE;
end;
h_Wnd := CreateWindowEx(dwExStyle,
'OpenGL',
WND_TITLE,
dwStyle,
0, 0,
Width, Height,
0,
0,
h_Instance,
nil);
if h_Wnd = 0 then
begin
glKillWnd(Fullscreen);
MessageBox(0, 'Unable to create window!', 'Error',
MB_OK or MB_ICONERROR);
Result := False;
Exit;
end;
h_DC := GetDC(h_Wnd);
if (h_DC = 0) then
begin
glKillWnd(Fullscreen);
MessageBox(0, 'Unable to get a device context!', 'Error',
MB_OK or MB_ICONERROR);
Result := False;
Exit;
end;
with pfd do
begin
nSize := SizeOf(TPIXELFORMATDESCRIPTOR);
nVersion := 1;
dwFlags := PFD_DRAW_TO_WINDOW
or PFD_SUPPORT_OPENGL
or PFD_DOUBLEBUFFER;
iPixelType := PFD_TYPE_RGBA;
cColorBits := PixelDepth;
cRedBits := 0;
cRedShift := 0;
cGreenBits := 0;
cGreenShift := 0;
cBlueBits := 0;
cBlueShift := 0;
cAlphaBits := 0;
cAlphaShift := 0;
cAccumBits := 0;
cAccumRedBits := 0;
cAccumGreenBits := 0;
cAccumBlueBits := 0;
cAccumAlphaBits := 0;
cDepthBits := 16;
cStencilBits := 0;
cAuxBuffers := 0;
iLayerType := PFD_MAIN_PLANE;
bReserved := 0;
dwLayerMask := 0;
dwVisibleMask := 0;
dwDamageMask := 0;
end;
PixelFormat := ChoosePixelFormat(h_DC, @pfd);
if (PixelFormat = 0) then
begin
glKillWnd(Fullscreen);
MessageBox(0, 'Unable to find a suitable pixel format', 'Error',
MB_OK or MB_ICONERROR);
Result := False;
Exit;
end;
if (not SetPixelFormat(h_DC, PixelFormat, @pfd)) then
begin
glKillWnd(Fullscreen);
MessageBox(0, 'Unable to set the pixel format', 'Error',
MB_OK or MB_ICONERROR);
Result := False;
Exit;
end;
h_RC := wglCreateContext(h_DC);
if (h_RC = 0) then
begin
glKillWnd(Fullscreen);
MessageBox(0, 'Unable to create an OpenGL rendering context', 'Error',
MB_OK or MB_ICONERROR);
Result := False;
Exit;
end;
if (not wglMakeCurrent(h_DC, h_RC)) then
begin
glKillWnd(Fullscreen);
MessageBox(0, 'Unable to activate OpenGL rendering context', 'Error',
MB_OK or MB_ICONERROR);
Result := False;
Exit;
end;
SetTimer(h_Wnd, FPS_TIMER, FPS_INTERVAL, nil);
ShowWindow(h_Wnd, SW_SHOW);
SetForegroundWindow(h_Wnd);
SetFocus(h_Wnd);
glResizeWnd(Width, Height);
glInit();
Result := True;
end;
function WinMain(hInstance : HINST; hPrevInstance : HINST;
lpCmdLine : PChar; nCmdShow : Integer) : Integer; stdcall;
var
msg : TMsg;
finished : Boolean;
DemoStart, LastTime : DWord;
begin
finished := False;
if not glCreateWnd(800, 600, FALSE, 32) then
begin
Result := 0;
Exit;
end;
DemoStart := GetTickCount();
while not finished do
begin
if (PeekMessage(msg, 0, 0, 0, PM_REMOVE)) then
begin
if (msg.message = WM_QUIT) then
finished := True
else
begin
TranslateMessage(msg);
DispatchMessage(msg);
end;
end
else
begin
Inc(FPSCount);
LastTime :=ElapsedTime;
ElapsedTime :=GetTickCount() - DemoStart;
ElapsedTime :=(LastTime + ElapsedTime) DIV 2;
glDraw();
SwapBuffers(h_DC);
if (keys[VK_ESCAPE]) then
finished := True
else
end;
end;
glKillWnd(FALSE);
Result := msg.wParam;
end;
begin
WinMain( hInstance, hPrevInst, CmdLine, CmdShow );
end.Подскажите, что сделать, пожалуйста.