oh, fyi - my simple solution was simply to flip the image
appropriately, and let osgdem do what it wanted with it. i know,
hacky, but i'm past the problem. getting things done! woo! :)
On Nov 29, 2007, at 8:09 AM, Bob Kuehne wrote:
> hi jim - this is a transform generated by osgdem (consumed via vpb)
> - i think it's a different transform than the kind you suggest, or
> at the least, it's not normalized. the transform _is_ correct for
> one of the images, and it's how robert has been generating these vpb
> config files for a while. so i think the elements are right, but
> just a bit off. full vpb config attached.
>
> bob
> <globe.vpb>
>
> but, On Nov 28, 2007, at 8:52 PM, Jim Brooks wrote:
>
>>> how would i flip it? i suspect i need to change the
>>> transform somehow:
>>>
>>> Transform {
>>> 360 0 0 0
>>> 0 180 0 0
>>> 0 0 1 0
>>
>> You're on the right track, but the matrix elements
>> are unit float {0.0,..,1.0} values, not degrees.
>> These 3 rows are 3D unit vectors that
>> define the 3 orthogonal axises.
>>
>> -1 0 0 # -1 = 180' rotation
>> 0 1 0
>> 0 0 1
>>
>>> -180 -90 0 1
>>
>> No, the last row is the origin of the matrix
>> (coordinate space).
>> Changing them results in translation, not rotation.
>>
>>
>>
>>
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>
> bob kuehne
> founder and ceo - blue newt software
> www.blue-newt.com 734/834-2696
>
>
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bob kuehne
founder and ceo - blue newt software
www.blue-newt.com 734/834-2696
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