Out of curiosity, why do you need to recompute them if you already have the data ?
-----Original Message-----
From: owner-3dgames(at)Softimage.COM [mailto:owner-3dgames(at)Softimage.COM] On Behalf Of André Adam
Sent: Thursday, December 07, 2006 10:55 AM
To: 3DGames(at)Softimage.COM
Subject: Re: Identifying a Tangents Property
How it is calculated. :)
Alexandre Jean-Claude wrote:
> 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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