[Radiance-general] perforate.cal
atelier iebele abel
atelier at iebele.nl
Wed Apr 13 16:56:00 CEST 2005
Hi Giulio,
Thanks for your quick reply. I will give Bodypaint a try, but I doubt if
it does generate surface normals from a file that doesn't have them.
Anyways, I wonder if the perforate.cal could be changed to work at once
on surfaces without UV coordinates.
When mapping pictures it goed well, since I (not really me:) changed a
few lines in picture.cal :
pic_u = U; //was: pic_u = Px;
pic_v = V; //was: pic_v = Py;
I don't know why this works, but it does....
If something like this could be done in the perforate.cal file, that
would be nice,
-Iebele
Giulio Antonutto wrote:
>I would suggest to follow this route:
>
>-1- use obj to export your model with an UV mapping defined (Maxon Bodypaint
>is what I use to create the UV, works fine... but I am pretty sure that even
>Blender has something similar)
>
>-2- edit the cal file substituting Lu and Lv with Px Py, no need of Pz since
>we are on a surface
>
>-3-
>Define a mesh primitive
>Define the material as usual
>
>-4- import the file with a mesh primitive and attach the material while
>importing:
>Obj2mesh -a materials model.obj > model.mesh
>
>
>
>Open you file wit objview, just a quick check,
>Hopefully all should be ok....
>
>I found this new feature really useful... all the old parametric textures
>are now UV... really cool!
>
>Cheers,
>Hope it works,
>
>giulio
>
>-----Original Message-----
>From: radiance-general-bounces at radiance-online.org
>[mailto:radiance-general-bounces at radiance-online.org] On Behalf Of atelier
>iebele abel
>Sent: 13 April 2005 15:18
>To: Radiance general discussion
>Subject: [Radiance-general] perforate.cal
>
>Hi group,
>
>I use a file called perforate.cal (from Georg).
>Is it possible to change this file in such way that use it on surfaces
>which various normal directions ( not only through x, y or z plane) ?
>
>
>-Iebele
>
>
>perforate.cal:
>{
> perforate.cal
> Perforation function for approximately horizontal sufaces,
> for use in a mixfunc. Foreground is solid, background the holes.
> Set background to empty for a true perforation, or to a different
> material for polka dots.
>
> Relative hole size is determined by A1.
> Size of single circle is 1 - scale as required (eg. 0.05m).
>
> x_hole cuts holes in x-direction (through the y-z plane)
> y_hole cuts holes in y-direction (through the x-z plane)
> z_hole cuts holes in z-direction (through the x-y plane)
>
> Georg Mischler 30. 04. 1993
>}
>
>`xn = mod(Px, 1) - 0.5;
>`yn = mod(Py, 1) - 0.5;
>`zn = mod(Pz, 1) - 0.5;
>
>`outofcirc(x, y, r) = if(sqrt(x*x + y*y) - r, 1, 0);
>
>z_hole = `outofcirc(`xn, `yn, A1);
>x_hole = `outofcirc(`yn, `zn, A1);
>y_hole = `outofcirc(`zn, `xn, A1);
>
>
>
>
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