PRB: Direct3D Spotlight Range Attenuation Different in DX5/DX6 (196371)
The information in this article applies to:
- Microsoft Windows 2000 Server
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Professional
- Microsoft DirectX Software Development Kit 5.0
- Microsoft DirectX Software Development Kit 5.0a
- Microsoft DirectX Software Development Kit 5.2
- Microsoft DirectX Software Development Kit 6.0
This article was previously published under Q196371 SYMPTOMS
There are applications that behave differently under DirectX 5.0 and
DirectX 6.0 when you use spotlight range attenuation in Direct3D Retained
Mode.
CAUSE
The "view-dependent specular highlighting" option was turned on in DirectX
5.0 by default and turned off in DirectX 6.0. This change should not affect
any applications developed using DirectX 5.0.
RESOLUTION
If you are going to use spotlight range attenuation in your application,
make sure that you set the following render mode to ensure that you get the
correct behavior on all versions of Direct3D Retained Mode without relying
on the default values:
IDirect3DRMDevice2 : D3DRMRENDERMODE_VIEWDEPENDENTSPECULAR
Without this flag, your application might behave differently depending on
which version of DirectX is installed.
STATUS
Microsoft has confirmed this to be a problem in the Microsoft products
listed at the beginning of this article.
| Modification Type: | Minor | Last Reviewed: | 3/21/2005 |
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| Keywords: | kbDirect3dRM kbprb KB196371 |
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