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Aspect Ratio

Started by TheSLASH Apr 21, 2006 at 6:57 AM 1 replies 650+ views

Original Post

Apr 21, 2006 at 6:57 AM

I have problem when I try to resize the window, the aspect ratio of the drawn content i wrong, it is streched. I do use a sprite (LPD3DXSPRITE) for the content, and some text (LPD3DXFONT), all in the window get's wrong aspect ratio. Here is the resize fuction: void ResizeScene(int width, int height) { D3DXMATRIXA16 matProjection; D3DXMatrixPerspectiveFovLH( &matProjection, 45.0f, (float)width/(float)height, 0.1f, 100.0f ); gpDevice->SetTransform( D3DTS_PROJECTION, &matProjection ); } I have used it from both WM_SIZE and WM_SIZING without positive result, nothing happends... The setup is DirectX 9.0c, and SDK from summer 2003.

circlesoft

Apr 21, 2006 at 11:00 AM

Do you actually reset the device, updating the D3DPRESENT_PARAMETERS with the new window dimensions? Not doing this will generally result in a stretched out display, which you described.

In general, what you want to do:

- Detect a resize
- Release all of your default pool objects, call OnDeviceLoss() on D3DX interfaces
- Update presentation parameters
- IDirect3DDevice9::Reset()
- Recreate all of your default pool object, call OnDeviceReset() on D3DX interfaces.

TheSLASH

Apr 24, 2006 at 8:18 AM

Thanx, it helped with the Lost and Reset functions.

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