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

[Bleicher, Thomas]

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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