You mean how it's calculated or how it is encoding the tangent ?
-----Original Message-----
From: owner-3dgames(at)Softimage.COM [mailto:owner-3dgames(at)Softimage.COM] On Behalf Of André Adam
Sent: Thursday, December 07, 2006 10:43 AM
To: 3DGames(at)Softimage.COM
Subject: Re: Identifying a Tangents Property
Ok, I see... ... ;) Btw, we really like the XSI tangent space, thus the efforts to clearly identify it.
While we're at it, is it somewhere documented in detail? Our programmers currently try to demystify the values to feed it to our engine, and I see them twisting and wrangling our UVs on a trial and error basis to make all of this fit together somehow...
Cheers!
-André
Alexandre Jean-Claude wrote:
> The heuristic we use in the dotXSI exporter in this case is to strstr for "tangent" in the vertex color prop. We also have an option to turn it off.
>
>
> -----Original Message-----
> From: owner-3dgames(at)Softimage.COM [mailto:owner-3dgames(at)Softimage.COM]
> On Behalf Of André Adam
> Sent: Thursday, December 07, 2006 6:33 AM
> To: 3DGames(at)Softimage.COM
> Subject: Re: Identifying a Tangents Property
>
> Hi Alexandre,
>
> thanks, however, the magic must be a different one. Checking for the op fails for frozen objects, while the dotXSI exporter still manages to identify it as a tangent property. Another idea left in the quiver?
>
> Many thanks so far!
>
> -André
>
>
> Alexandre Jean-Claude wrote:
>
>> You need to check for the tangent operator underneath the vertex color.
>>
>> -----Original Message-----
>> From: owner-3dgames(at)Softimage.COM
>> [mailto:owner-3dgames(at)Softimage.COM]
>> On Behalf Of André Adam
>> Sent: Wednesday, December 06, 2006 6:07 AM
>> To: 3dgames(at)Softimage.COM
>> Subject: Identifying a Tangents Property
>>
>> Hello alltogether,
>>
>> we're currently playing around with the tangents property generated by XSI. If exported to dotXSI5, the Type description is "TEXTANGENT".
>> However, within XSI the Type returns "vertexcolor". We can't seem to find any hint on that property within XSI to clearly identify it as a tangents property, which we would like to do to pass it over to our Custom Display Host.
>> Obviously this is possible, so, how does the dotXSI exporter identify it as a tangents property?
>>
>> Oh, and if anyone has any idea what kind of information is stored in
>> the alpha channel during tangent generation, that would be an
>> interesting extra bit of information... :)
>>
>> Thanks in advance for a quick hint...
>>
>> -André
>>
>
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