[Radiance-general] RE: Translating a grid into an acad file

[Randolph Fritz]

It seems to me that AutoCAD has an MxN mesh operation (3dmesh?) that 
might be useful here; you could simply create a .scr file and feed it to 
AutoCAD. If that doesn't work, the "sdxf.py" 
<http://www.stani.be/python/sdxf> script Python library might be of some 
use.

Randolph

Bleicher, Thomas wrote:
> Martin.
>
> Creating a DXF file from scratch might be tricky.
> The reference states that an application can savely
> skip anything (or nearly anything) it doesn't know
> about but I guess that's not true for applications
> that write DXF.
>
> If you realy want to use DXF I'd crate a small file
> with two 3DFace triangles and look at the DXF file
> that produces. It should be possible to copy the
> lines of the 3DFace definition and change the values
> of the x,y and z coordinates. There are some binary
> issues you have to be aware of, though.
>
> You can find DXF specs here:
>
> http://usa.autodesk.com/adsk/servlet/item?siteID=123112&id=5129239
>
> You might have more luck creating an *.obj file
> (which has been discussed in the last months at least
> once) or a *.3ds/*.vrml/*.whatever _simple_ format and
> check if your ACAD installation has an importer for it.
>
>
> Thomas
>
>
>   
>> -----Original Message-----
>> From: radiance-general-bounces at radiance-online.org 
>> [mailto:radiance-general-bounces at radiance-online.org] On 
>> Behalf Of Martin Moeck
>> Sent: 04 September 2006 18:53
>> To: Radiance general discussion
>> Subject: Translating a grid into an acad file
>>
>> Hello,
>>
>> I would like to translate a grid with dimensions m X n 
>> consisting of equally spaced cartesian coordinates in x and 
>> y, but varying heights in z, into a 3D acad file or 3D acad 
>> readable format. The file format is as follows:
>>
>> x1 y1 z
>> x1 y2 z
>> x1 y3 z
>> ...
>> x1 yn z
>> x2 y1 z
>> x2 y2 z
>> x2 y3 z
>> ...
>> x2 yn z
>> ...
>> xm y1 z
>> xm y2 z
>> xm y3 z
>> ..
>> xm yn z
>>
>> where z is a variable with different real positve values 
>> indicating variable different heights. This set could come 
>> from a radiance mesh primitive, but this is not important 
>> here. It is just topography, such as the geometry of a 
>> landscape. How would you approach this problem? Intermediate 
>> steps using the obj or other formats might possibly help. 
>>
>> Thanks
>>
>> Martin
>>
>>     
>
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