[Radiance-general] Re: Texture mapping, openGL.

[iebele]

Hi Greg,

My model uses transparent textures, which is not supported by tmesh2rad.
Added some extras line in the output of tmesh2rad for the tranparent 
texture, which works fine:

void mixpict T-Pat
7 TCOLOR void green
./test_alpha.pic
tmesh.cal u v
0 7
2
0.1  0.0  0.0
0.0  0.1  0.0

It would be nice if I had a better understanding of  the A1-A7 
variables. I like to calcultate these whitin my program, so I can export 
the scene to radiance including the mixpict.

Could you explain to me how to calculate the A1-A7 variables for 
tmesh.cal, given a set of vertexcoordinates and  texturecoordinates?

-Iebele


> Hi Iebele,
>
> Did you try tmesh2rad?
>
> -Greg
>
>> From: iebele <info at iebele.nl>
>> Date: May 17, 2008 3:29:44 PM PDT
>>
>> Dear all,
>>
>> I have a project running fine with textures in openGL which I like to 
>> export to radiance.
>> For the texture mapping in openGL texture coordinates are drawn for 
>> every point of a polygon point like this:
>>
>>    glTexCoord2f ( tx, ty );
>>    glNormal3f ( nx, ny, nz );
>>    glVertex3f ( px, py, pz );
>>
>> I am puzzled how to translate this  into a radiance scene 
>> description, /whithout/ the use of obj2mesh. Does any of you have an 
>> example available of  a picture mapped on a polygon using texture 
>> coordinates?
>>
>> -Iebele
>
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