[REQUEST] bitmap to mesh with materials

baldaman

Please look at the image below, my english is too poor to explain clearly what I mean thanks to words.
I was thinking that if thomthom's plugin "bitmap to mesh" can handle bitmaps the way it does, maybe what I am asking for could be possible.
Thanks in advance.

TIG

You might be in luck... I have been developing a set of Image manipulation 'jar' files. It would be quite possible take a Selected Image and extract each pixel from in turn with its RGB value and then make a dat file of it that SUP can process into squares equivalent to the image and new materials for each color...
I see the dat file being like this... assuming a 6x6 image with RRGGRR colors on each line
255,0,0 255,0,0 0,255,0 0,255,0 255,0,0 255,0,0
255,0,0 255,0,0 0,255,0 0,255,0 255,0,0 255,0,0
255,0,0 255,0,0 0,255,0 0,255,0 255,0,0 255,0,0
255,0,0 255,0,0 0,255,0 0,255,0 255,0,0 255,0,0
255,0,0 255,0,0 0,255,0 0,255,0 255,0,0 255,0,0
255,0,0 255,0,0 0,255,0 0,255,0 255,0,0 255,0,0
Using lines=IO.readlines(datfile) it then works out how wide and high the pixel-image is and makes a grouped set of flat faces so its overall size matches the original Image. It then takes a line from the lines at a time and checks the color of that 'square' using cols=line.split(' '), col=cols[0] etc and col=col.split(',') etc etc.
Assembling a [new] Material name using something like...

r=col[0]; g=col[1]; b=col[2]
name="Mat-"+r+'-'+g+'-'+b
mats=model.materials
if not mat=mats[name]
 mat=mats.add(name')
 mat.color.red=r.to_i
 mat.color.green=g.to_i
 mat.color.blue=b.to_i
end
face.material=mat
face.back_material=mat

Here the first pixel material.name is "Mat-255-0-0", as that exists later any squares with that color use the existing one not making anew one...
I'll think it through over the weekend...

thomthom

I can easily make Bitmap to Mesh do that. Just a minor change from what it does now.

TIG

@thomthom said:

I can easily make Bitmap to Mesh do that. Just a minor change from what it does now.

Over to you ThomThom...

baldaman

Dear ruby masters, thank you for your response.
So it seems possible right?

I allready imagine what a funny contest we could organise with this tool!!!

Ok let's prepare some cookies...

baldaman

Here is an exemple of what I did for a custom sunscreens system somwhere near equator. The goal is to stop every sun rays while in the same time according visual porosity toward sky. The visual porosity changes according the position of the observer.

I used 3ds max and polyboost plugin's "bitmap select" feature. After that, back to Sketchup and "components onto face collections".
The components layout what painted in photoshop with brushes in order to obtain gradations.

I am also thinking of using this method for façade panels variations.
My goal is to be able to do the whole process inside Sketchup.

PS: My english lessons are so far away: sorry for my frenglish

God bless proxies

baldaman

View from below

T027.1.jpg

thomthom

This is the season to be busy. I didn't manage to finish that update this weekend. I'll come.

baldaman

Ok thanks Thom, please take all the time you need.
No hurry

thomthom

http://forums.sketchucation.com/viewtopic.php?f=323&t=31339#p275772

baldaman

You are the don Thom, thank you so much!!!
I am at the office now, not time to check this out

thomthom

Post back some samples of what you use it for. I'm very curious.

baldaman

Works perfectly.
We need to be carefull with the number of colours of the bitmap!

After a few tests,

best settings are:
. indexed colors in photoshop or another image editor (in Photoshop you can choose the number, in the exemple below we have 12 colors)
. save as bmp (8bit, no compression).

First exemple is specialy dedicated to Thomthom

baldaman

More serious use exemples to come asap.