stippler - Scree Painter

[luca]

Hi Ricardo,
i tried the software (just make it run). You are right, it has a goal 
similar to stippler. Actually i think is not possible to use in the same 
way that stippler, but we could try to collaborate with the 
developers... By now the problem is that Scree Painter requires 4 data:

1    shaded relief map (for archaeological drawing purpose i guess it 
should be easy to change this point with a norma picture, like for 
stippler.           The  software accept tif, jpg png grayscale, so more 
formats than stippler)

2    DEM (that's a problem. The software does not work without. We would 
need this required point as an option (just to get drawing from 3d 
models), but till it is a necessary a DEM it is not possible to use  
Scree Painter to draw finds from just a simple picture (like in 
stippler). The other problem is that the software accept ESRI ASCII 
Grid, so if we want to use to draw 3d object, we have to trasform the 
ply or the VTK file in a ESRI Gris file, probably import the original 
models inside a GIS (this point is still a little bit difficult to do. A 
possibility would be: Meshlab trasform the model from ply to dxf 
-loosing the textur-, Grass import the dxf and export the ESRI Grid. The 
colour will be lost, but it should work. Anyway the real colour is not 
necessary to draw the find)

3 Polygons. Here i don't understand very good. The software requires 
polygons. There are to possigility:
     1 the software just insert polygons in the image. This would be 
perfect, because would be possible to insert the lines to draw the 
border of the     object and the details directly inside the image (and 
not in post-processing like we do with stippler). But than i don't 
understand why this               should be a requirement (it should be 
just an option).
     2 I fear that Scree Painter does not use the algorythm of Adrian 
Seocrd (the one of stippler) to display the dots in the rigth place, but 
simply puts     dots in a different way, according to the iso-lines. 
This would explain why the polygons are needed by the software. If so, 
it is not possible to use     Scree Painter for the atomatic 
archaeological drawing

4 Obstacle Mask. This is very usefull to choose areas that has not to be 
stippled.

Soon, i hope, i will try to do an image, so i can understand better how 
the software works (expeciakky if it uses an algorithm to displace the 
dots according to the shadows of the image, that it is what we need. if 
so we could try to contact the programmers or thry to modify the source 
code to delete some requirements and make the software work also with 
just 2d picture (the 3d should be just an option).

Ciao.


On 13/01/11 20:40, Ricardo Gaidão wrote:
> Scree Painter is a program aimed to create stippled look geographic maps from 3D terrain models.
>
> I think this program don't fit inside the ArcheOS suite, but I find it interesting because have a goal, very similar to Stippler.
>
> http://www.screepainter.com/index.html
>
> Scree Painter is open and free, and maybe is approach/code, have some value to improve other programs used to create stippled images from artifacts images or 3d archaeological models.
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> Mailing list info: http://lists.linux.it/listinfo/archeos-dev
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