我正在编写一个WIN32 DirectX 9程序，在其中加载一些纹理（一个人和一个背景）并在屏幕上显示它们。然而，它们变得扭曲（拉伸），而不是我在Paint中绘制的一对一表示。我尝试了不同的窗口大小和不同的屏幕分辨率，但它仍然不起作用。
在绘制精灵之前，我可以通过调用D3DXMatrixTransformation2D来强制模仿原始事物。但是，这并不能解决问题。我的程序依赖于我确切知道该人在背景中的确切位置（实际上，背景移动并且人员停留在屏幕中间）。
是否有一些我想念的简单或是因为某种原因我不能这样做？我可以提供代码，如果它不仅仅是一个简单的修复，但我希望不是。为了记录，我没有收到任何错误或警告;这只是一个视觉和运动跟踪问题。谢谢。
编辑：这是一些代码： //start of program
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
//Define and register the Windows Class ***Function
createWindowClass(hInstance);
//Create the window (still not shown)
HWND hWnd = CreateWindow("Sample Window Class", "Person With Ship", WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, 800, 600, NULL, NULL, hInstance, NULL);
//Define and create the DirectX9 object ***Function
HRESULT hr = createDirectX(hWnd);
D3DXCreateSprite(d3dDevice, &sprite);
D3DXCreateTextureFromFile(d3dDevice, "landingPad2.png", &texture);
D3DXCreateTextureFromFile(d3dDevice, "person.png", &person);
//D3DXCreateTextureFromFile(d3dDevice, "secondRoom.png", &secondRoom);
//Set up text
LPD3DXFONT mFont;
D3DXCreateFont(d3dDevice, 20, 0, FW_BOLD, 0, FALSE, DEFAULT_CHARSET, OUT_DEFAULT_PRECIS,
DEFAULT_QUALITY, DEFAULT_PITCH | FF_DONTCARE, TEXT("Arial"), &mFont );
//Finally show window
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
//setup keyboard
RAWINPUTDEVICE Rid[1]; // array of structs for input devices
Rid[0].usUsagePage = 1; // use 1 for most inputs
Rid[0].usUsage = 6; //2-mouse, 4-joystick, 6-keyboard
Rid[0].dwFlags = 0; //use 0
Rid[0].hwndTarget=NULL; //use NULL
RegisterRawInputDevices(Rid,1,sizeof(RAWINPUTDEVICE)); // registers all of the input devices
//MAIN LOOP!!
MSG msg;
ZeroMemory(&msg, sizeof(msg));
while (msg.message!=WM_QUIT)
{
while(PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
updateGraphics(hr, mFont);
updatePosition();
}
mFont->Release();
texture->Release();
return msg.wParam;
}
void createWindowClass(HINSTANCE hInstance)
{
const LPCSTR CLASS_NAME = "Sample Window Class";
//create windows object
WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style= CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc= (WNDPROC)WndProc;
wcex.cbClsExtra= 0;
wcex.cbWndExtra= 0;
wcex.hInstance= hInstance;
wcex.hIcon= 0;
wcex.hCursor= LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground= (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName= 0;
wcex.lpszClassName= CLASS_NAME;
wcex.hIconSm= 0;
//register windows class
RegisterClassEx(&wcex);
}
HRESULT createDirectX(HWND hWnd)
{
//create directx object
d3dObject = Direct3DCreate9(D3D_SDK_VERSION);
if (d3dObject==NULL)
{
exit(1);
}
//Present Parameters struct
D3DPRESENT_PARAMETERS presParams;
//Sets everything to 0
ZeroMemory(&presParams, sizeof(presParams));
presParams.Windowed = TRUE;
presParams.SwapEffect = D3DSWAPEFFECT_DISCARD;
presParams.BackBufferFormat = D3DFMT_UNKNOWN;
presParams.PresentationInterval = D3DPRESENT_INTERVAL_ONE;
//DIRECT3D Stuff (not used currently)
//presParams.EnableAutoDepthStencil = TRUE;
//presParams.AutoDepthStencilFormat = D3DFMT_D16;
//d3dDevice->SetRenderState(D3DRS_ZENABLE, D3DZB_TRUE);
//D3DXMatrixIdentity( &worldMatrix );
HRESULT hr = d3dObject->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL,hWnd, D3DCREATE_HARDWARE_VERTEXPROCESSING, &presParams, &d3dDevice);
return hr;
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_INPUT:
{
UINT bufferSize;
GetRawInputData((HRAWINPUT)lParam, RID_INPUT, NULL, &bufferSize, sizeof (RAWINPUTHEADER));
// Create a buffer of the correct size
BYTE *buffer=new BYTE[bufferSize];
// Call the function again, this time with the buffer to get the data
GetRawInputData((HRAWINPUT)lParam, RID_INPUT, (LPVOID)buffer, &bufferSize, sizeof (RAWINPUTHEADER));
PRAWINPUT raw = (RAWINPUT*) buffer;
getInput(raw);
break;
}
case WM_COMMAND:
{
int wmId = LOWORD(wParam);
int wmEvent = HIWORD(wParam);
// Parse the menu selections:
switch (wmId)
{
case IDM_EXIT:
DestroyWindow(hWnd);
break;
}
break;
}
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
void getInput(PRAWINPUT raw)
{
if (raw->header.dwType== RIM_TYPEKEYBOARD)
{
USHORT keyCode = raw->data.keyboard.VKey;
switch(keyCode)
{
case VK_LEFT:
keyUp=raw->data.keyboard.Flags & RI_KEY_BREAK;
if (keyUp == false)
counterTrue = true;
else
counterTrue = false;
break;
case VK_RIGHT:
keyUp=raw->data.keyboard.Flags & RI_KEY_BREAK;
if (keyUp == false)
clockwiseTrue = true;
else
clockwiseTrue = false;
break;
case VK_UP:
keyUp=raw->data.keyboard.Flags & RI_KEY_BREAK;
if (keyUp == false)
upTrue = true;
else
upTrue = false;
break;
case VK_DOWN:
keyUp=raw->data.keyboard.Flags & RI_KEY_BREAK;
if (keyUp == false)
downTrue = true;
else
downTrue = false;
break;
default:
break;
}
if (keyCode == 'A')
{
keyUp=raw->data.keyboard.Flags & RI_KEY_BREAK;
if (keyUp == false)
leftTrue = true;
else
leftTrue = false;
}
if (keyCode == 'D')
{
keyUp=raw->data.keyboard.Flags & RI_KEY_BREAK;
if (keyUp == false)
rightTrue = true;
else
rightTrue = false;
}
if (keyCode == 'W')
{
keyUp=raw->data.keyboard.Flags & RI_KEY_BREAK;
if (keyUp == false)
upTrue = true;
else
upTrue = false;
}
if (keyCode == 'S')
{
keyUp=raw->data.keyboard.Flags & RI_KEY_BREAK;
if (keyUp == false)
downTrue = true;
else
downTrue = false;
}
}
}
void updateGraphics(HRESULT hr, LPD3DXFONT mFont)
{
hr = d3dDevice->Clear(0, NULL, D3DCLEAR_TARGET| D3DCLEAR_ZBUFFER, D3DCOLOR_XRGB(0,0,0), 1.0f, 0);
hr = d3dDevice->BeginScene();
sprite->Begin(D3DXSPRITE_ALPHABLEND);
// Texture being used is 64 by 64:
D3DXVECTOR2 spriteCentre=D3DXVECTOR2(rotationCenter.x, rotationCenter.y);
// Screen position of the sprite
D3DXVECTOR2 trans=D3DXVECTOR2(pos.x, pos.y);
// Build our matrix to rotate, scale and position our sprite
D3DXMATRIX mat;
D3DXVECTOR2 scaling(0.5798f, 0.784f);
// out, scaling centre, scaling rotation, scaling, rotation centre, rotation, translation
D3DXMatrixTransformation2D(&mat,NULL, NULL, &scaling,&spriteCentre,rotation,NULL/*&trans*/);
// Tell the sprite about the matrix
sprite->SetTransform(&mat);
sprite->Draw(texture, NULL, &rotationCenter, &pos, 0xFFFFFFFF);
scaling.x = 0.53;
scaling.y = 0.57f;
D3DXMatrixTransformation2D(&mat,NULL,0.0, &scaling,&spriteCentre, 0,NULL/*&trans*/);
sprite->SetTransform(&mat);
sprite->Draw(person, NULL, NULL, &personPos, 0xFFFFFFFF);
sprite->End();
DisplaySomeText(mFont);
d3dDevice->EndScene();
d3dDevice->Present(NULL, NULL, NULL, NULL);
}
void updatePosition()
{
if (clockwiseTrue == true)
{
rotation -= (float)0.03;
}
else if (counterTrue == true)
{
rotation += (float)0.03;
}
if (rotation >(PI))
{
rotation -= (float)(2*PI);
}
if (rotation <= -(PI))
{
rotation += (float)(2*PI);
}
if (upTrue == true)
{
pos.y += (3*cos(rotation));
pos.x += (3*sin(rotation));
}
else if (downTrue == true)
{
pos.y -= (3*cos(rotation));
pos.x -= (3*sin(rotation));
}
if (leftTrue == true)
{
pos.x += (3*cos(rotation));
pos.y -= (3*sin(rotation));
}
else if (rightTrue == true)
{
pos.x -= (3*cos(rotation));
pos.y += (3*sin(rotation));
}
//collision detection
if (rotation >=0 && rotation < (PI/2))
{
if (pos.y - (30*cos(rotation)) - (30*sin(rotation)) < -138 && pos.x < 350 && pos.x > -550)
{
pos.y = -142 + (30*cos(rotation)) + (30*sin(rotation));
}
}
if (rotation < 0 && rotation > -(PI/2))
{
if (pos.y - (51*cos(rotation)) + (14*sin(rotation)) < -142 && pos.x < 350 && pos.x > -550)
{
pos.y = -142 + (51*cos(rotation)) - (14*sin(rotation));
}
}
if (rotation < -(PI/2) && rotation > -(PI))
{
if (pos.y + (51*cos(rotation)) + (14*sin(rotation)) < -142 && pos.x < 350 && pos.x > -550)
{
pos.y = -142 - (51*cos(rotation)) - (14*sin(rotation));
}
}
if (rotation > (PI/2) && rotation <= (PI))
{
if (pos.y + (51*cos(rotation)) - (14*sin(rotation)) < -142 && pos.x < 350 && pos.x > -550)
{
pos.y = -142 - (51*cos(rotation)) + (14*sin(rotation));
}
}
}
void DisplaySomeText(LPD3DXFONT mFont)
{
// Create a colour for the text - in this case blue
D3DCOLOR fontColor = D3DCOLOR_ARGB(255,0,0,255);
// Create a rectangle to indicate where on the screen it should be drawn
RECT rct;
rct.left=200;
rct.right=780;
rct.top=10;
rct.bottom=rct.top+20;
TCHAR cX[30] = "x";
TCHAR cY[30] = "y";
TCHAR cR[30] = "r";
TCHAR cQ[30] = "q";
size_t cchDest = 30;
LPCTSTR pszFormat = TEXT("%f");
HRESULT har = StringCchPrintf(cX, cchDest, pszFormat, pos.x);
HRESULT her = StringCchPrintf(cY, cchDest, pszFormat, pos.y);
HRESULT hir = StringCchPrintf(cR, cchDest, pszFormat, rotation);
HRESULT hur = StringCchPrintf(cQ, cchDest, pszFormat, (pos.y - (43*cos(rotation))));
mFont->DrawText(NULL, cX, -1, &rct, 0, fontColor);
rct.left += 100;
mFont->DrawText(NULL, cY, -1, &rct, 0, fontColor);
rct.left += 100;
mFont->DrawText(NULL, cR, -1, &rct, 0, fontColor);
rct.left += 100;
mFont->DrawText(NULL, cQ, -1, &rct, 0, fontColor);
}
答案 0 :(得分：1)
所以，最后：问题是由于纹理尺寸不是2的幂:)这种行为很常见，但仍然依赖于硬件：理论上可能存在一些处理任意纹理大小相同的视频卡作为两个大小的力量的方式。要知道他们这样做，我们必须通过IDirect3DDevice9 :: GetDeviceCaps检查他们的能力。