[Plugin] Color by Slope

Didier Bur

Hi,

you could start with a grayscale mapping of the surface slopes, then take the grayscale value for each surface and tweek the HLS value of colors used for the surface, create a Palette of these shades, and apply them to their respective surfaces

I've done something similar (well, sort of) in my "paint_altitude_faces.rb" veeeeery ooooold script. Go look into it if it can help, it is not crypted

mattg

Chris,

Was just wondering if you updated your version of the script with all the new inclusions? No offense intended, but im not sure how stable or whatever the other versions are.

Cheers.

-Matt

olishea

thanks for this plugin. im a big fan of your color by z plugin too, I use it far too often!

Chris Fullmer

UPDATE! version 1.5 available. (But not much changed, just compiled all the scripts that had been lying around this thread, and now I've uploaded it to smustard to host).

@MattG, sorry it took so long to respond here! Yes, the other versions that were posted were quite stable. I've now consolidated everything into a single script and uploaded it to smustard.com:

@Olishea - thanks! I'm glad you like these scripts It always nice to know poeple use some of them.

Download
http://www.smustard.com/script/ColorBySlope

So go there now to download the final version of this script (I made one or two minor tweaks that might improve the speed, but I wouldn't count on it).

mattg

Nah no worries.
Thankyou so much for this and all you other scripts - you're an absolute legend!

Ecuadorian

Thank you, Chris!

I could have used this when I was a student, as I had to do it manually for Urban Design class. You know, to decide which parts of a site to use for housing, which ones for parks, which ones not to use at all, etc.

riboflavele

I im trying to use this script, but i want to know its possible to change the colors and is it possible to know the slope % vs colors...? im not sure if my question is clear... Is it possible to have a legend or somthing to see for example that blue = 0% to 20% of slope and red = 40% to 60% of slope...

Sorry for my english...

TIG

See
mat.color=[(255-value),value,value]
line #56~
Sets the face color, value is set by the angle...
Edit it there...

halsktchup

TIG, Chris,

Thanks for the color by slope script. Like another person in here, I too am trying to see if I can get specific colors for specific slopes. Is there a later version to your script on smustard that contains this? For example if I need a certain red for anything above 20% slope, how do I get that?

Thanks.

Chris Fullmer

Hey, so far the script does not do that. I do plan on implementing it eventually. I've got a super busy week and I do not anticipate being able to look at it right away, but it might be easy enough to just tweak some lines of code to make it work how you want. Maybe by next weekend I'll be able to look at it.

Chris

TIG

Hope I'm not standing on any toes...

### edited/replace the code from here................
faces = []
flat = []
angle = 0.0
sel.each do |e|
  faces << e if e.is_a? Sketchup;;Face
end#do
### first set up some [r,g,b] colors for various slope angles
### we use them if they exist, but if not make them...
if not color_00_20 = model.materials["color_00_20"]
  color_00_20 = model.materials.add("color_00_20")
  color_00_20.color= [120,0,0]
end#if
if not color_20_40 = model.materials["color_20_40"]
  color_20_40 = model.materials.add("color_20_40")
  color_20_40.color= [150,0,0]
end#if
if not color_40_60 = model.materials["color_40_60"]
  color_40_60 = model.materials.add("color_40_60")
  color_40_60.color= [180,0,0]
end#if
if not color_60_80 = model.materials["color_60_80"]
  color_60_80 = model.materials.add("color_60_80")
  color_60_80.color= [210,0,0]
end#if
if not color_80_90 = model.materials["color_80_90"]
  color_80_90 = model.materials.add("color_80_00")
  color_80_90.color= [240,0,0]
end#if
### you can adjust the colors' rgb values to suit...
###
faces.each do |e|
  enorm = e.normal
  flat = Geom;;Vector3d.new(enorm[0],enorm[1],0)
  angle = (flat.angle_between enorm).radians ### angle in in degrees
  ### now set up the tests for different angles
  ### change these test ranges etc to suit your requirements...
  if angle>=0.0 and angle<=20.0
    color=color_00_20
  elsif angle>20.0 and angle<=40.0
    color=color_30_40
  elsif angle>40.0 and angle<=60.0
    color=color_40_60
  elsif angle>60.0 and angle<=80.0
    color=color_60_80
  else ### angle>80.0
    color=color_80_90
  end#if
  e.material = color
  e.back_material = color
end#do
### end of edit/replace.................

Make a backup copy of the original ruby script outside of the Plugins folder so it won't try load twice. If you mess up then you have the original to use again...
Now edit/replace the version that's still in the Plugins folder, as set out above [open with Notepad.exe or equivalent plain-text editor].
Save it and restart Sketchup - all slopes should now be colored in the angle-ranges and colors you've specified...

Chris Fullmer

@tig said:

Hope I'm not standing on any toes...

Nope, not at all! Thanks TIG,

Chris

anilnimesh

Color by angle by you is amazing...
rather i had changed name of the tool as 'Slope by angle'

wow! ur work is amazing.

Please brief about color assignments in case of 'color by Slope'?

About myself, i m an Architect from India and doing practice in Delhi.
regards,
Anil Nimesh

Chris Fullmer

@anilnimesh said:

Please brief about color assignments in case of 'color by Slope'?

Thanks for using my plugin. I'm not entirely sure what you are requesting though. Let me know if there is a feature you think should be added, thanks!

Chris

anilnimesh

Hi Chris,
i using sketchu pro v7.
while using the tool, it is bit difficult to understand, which color is applied for which slope. i need to calculate, hw the tool is working?
is there any color which defines slope (like 0-5% or 5%-10%) in slabs? i mean say 'red' for slope slab 0-5%

u wrote highest color no. is for low gradient and vice versa. u also wrote to explode the group (containing the terrain) and select color and make a new group out of those.

i tried but found it little tidious...

althought it is much simplied then what we do manually.. but i need to understand more about your tool.

u also made a new one for v8 where it is called 'Color by slope stepped'. i found the previous one more relevant for my work.

so i need to know that can the tool defines colors w.r.t. slope in slabs (like 0-5% or 5%-10%) ?

regrds,

Agama

@tig said:

Hope I'm not standing on any toes...

### edited/replace the code from here................
> faces = []
> flat = []
> angle = 0.0
> sel.each do |e|
>   faces << e if e.is_a? Sketchup;;Face
> end#do
> ### first set up some [r,g,b] colors for various slope angles
> ### we use them if they exist, but if not make them...
> if not color_00_20 = model.materials["color_00_20"]
>   color_00_20 = model.materials.add("color_00_20")
>   color_00_20.color= [120,0,0]
> end#if
> if not color_20_40 = model.materials["color_20_40"]
>   color_20_40 = model.materials.add("color_20_40")
>   color_20_40.color= [150,0,0]
> end#if
> if not color_40_60 = model.materials["color_40_60"]
>   color_40_60 = model.materials.add("color_40_60")
>   color_40_60.color= [180,0,0]
> end#if
> if not color_60_80 = model.materials["color_60_80"]
>   color_60_80 = model.materials.add("color_60_80")
>   color_60_80.color= [210,0,0]
> end#if
> if not color_80_90 = model.materials["color_80_90"]
>   color_80_90 = model.materials.add("color_80_00")
>   color_80_90.color= [240,0,0]
> end#if
> ### you can adjust the colors' rgb values to suit...
> ###
> faces.each do |e|
>   enorm = e.normal
>   flat = Geom;;Vector3d.new(enorm[0],enorm[1],0)
>   angle = (flat.angle_between enorm).radians ### angle in in degrees
>   ### now set up the tests for different angles
>   ### change these test ranges etc to suit your requirements...
>   if angle>=0.0 and angle<=20.0
>     color=color_00_20
>   elsif angle>20.0 and angle<=40.0
>     color=color_30_40
>   elsif angle>40.0 and angle<=60.0
>     color=color_40_60
>   elsif angle>60.0 and angle<=80.0
>     color=color_60_80
>   else ### angle>80.0
>     color=color_80_90
>   end#if
>   e.material = color
>   e.back_material = color
> end#do
> ### end of edit/replace.................
>

Make a backup copy of the original ruby script outside of the Plugins folder so it won't try load twice. If you mess up then you have the original to use again...

Now edit/replace the version that's still in the Plugins folder, as set out above [open with Notepad.exe or equivalent plain-text editor].
Save it and restart Sketchup - all slopes should now be colored in the angle-ranges and colors you've specified...

Hello,
Can you please explain how to do it 'step by step'? I've never used ruby script, however this tool will be very usefull for me if I can influence the slope colours.
Thank you for your help:)

dansphere

Yes I'm also having trouble, I've had a shot at changing the ruby but no luck.
Perhaps a logarithmic function for the assignment of colour to slope angle would work well, and then being able to reverse the log direction.. ??

Dan

Chris Fullmer

What are you trying to do Dan? Just use a different method of determining the color to assign?

brookefox

Here we have a near flat creek be with sloping sides and a near flat upper terrain. Faces picked to be colored are still shown picked. Highest slope r255 g0 b0; lowest r0 g0 b255 (or something like these values). There are some blue vertical slopes elsewhere.

I think it would be helpful if the flats got colored, too. So everything gets a color value. I would have thought lowest slope = flat, rather than vertical, which it seems to be. color by slope-2.JPG

I had wanted to try to use this as a means of selecting the slopes vs. the near flats for grouping, which I did manually with not too much difficulty.

sherwood11

Hello,
The plug-in appears to load properly. However, I get this Ruby Console feedback when I run it.

segment 3 [60 to 90]
segment 2 [30 to 60]
segment 1 [0 to 30]
Error: #<ArgumentError: comparison of Float with nil failed>
(eval):2304:in >' (eval):2304:in update'
C:/Program Files/Google/Google SketchUp 8/Plugins/clf_color_by_slope.rb:230:in colorbyslope' C:/Program Files/Google/Google SketchUp 8/Plugins/clf_color_by_slope.rb:223:in each'
C:/Program Files/Google/Google SketchUp 8/Plugins/clf_color_by_slope.rb:223:in colorbyslope' C:/Program Files/Google/Google SketchUp 8/Plugins/clf_color_by_slope.rb:254 (eval):2304:in call'
(eval):2304

Has anyone encountered this before ? .... any solution or direction to resolve ?
I have checked that faces are faces (not surfaces).
Segment materials appear in the list of materials.
The faces just don't want to color ...

Thank you for your help