This is last step I would like to do with my terrain in SU 8.
In the old model I used one color for one level of terrain / contour. The terrain height is from 600m ASL to 789m. One level usually have 3m. So in this model there should be 3m gaps between the horizontal faces.
In new model I have created the hills and I would like to apply colour to them on the logic of old model. So when the faces are on 600-602m ASL, material “600” should be applied to any faces in this level. If the faces are on 603 to 605m of elevation then it should have material “603”, etc.
Notice there is some exception on some of the tops/vertexes, where this may not fit the step of 3m.
This the model, where the material should be applied on faces: terrain_ready.skp (4.1 MB)
I might have messed around with your scenes a bit: exploded gm.skp (5.3 MB)
If you get the Ruby working you can tweak the results yourself. It doesn’t handle missing materials very well yet.
# encoding: UTF-8
module GM
module ContourColour
extend self
def set_material(face, material)
face.material = material
rescue
@bad_materials += 1
end
def colour_contours
puts ("colour_contours")
model = Sketchup.active_model
model.start_operation("Contour Colour", true)
ents = model.active_entities
faces = ents.grep(Sketchup::Face)
puts ("Contour Colour found #{faces.size} faces")
@bad_materials = 0
use_centre = false
faces.each do |f|
if use_centre
#Find height of centre of bounding box of each face
centre = f.bounds.center
centre_height = centre.z
height_m = centre_height.to_m.to_i
else #Use lowest vertex
lowest = 10000.m
f.vertices.each do |v|
lowest = v.position.z if v.position.z < lowest
end #f.vertices.each
height_m = lowest.to_m.to_i
end
# height_m contains the height in m of the centre of the face
# Now needs rounded to nearest 3m
rounded_height = (height_m - 600) / 3 * 3 + 600
material_name = rounded_height.to_s
set_material(f, material_name)
end #faces.each
puts ("#{@bad_materials} materials missing")
model.commit_operation
end #colour_contours
# Run Once at startup block here:
this_file = Module::nesting[0].name << ':'<< File.basename(__FILE__)
unless file_loaded?( this_file )
menu = UI.menu("Plugins").add_item("Contour Colour") {self.colour_contours}
file_loaded( this_file )
end #unless
end #ContourColour
end #GM
Something changed because some* edges were hidden and now they are visible. Which looks ugly. But it would be great to keep the original countour edges (horizontal ones). So can you yet modify this code to keep the countour lines (horizontal edges) visible, but to keep the “vertical”* edges hidden? As vertical* edge I mean any edge which does not have starting and ending point y axis same value.
So it would be perfect result if the original black countours stay untouched and rest of edges are hidden.
The problem is that the sandbox faces don’t include the origin contour lines, they’ve been smoothed out. The contour lines sometimes disappear inside the surface and the colours go above and below the lines. To make it better, you could try one or all of the lofting extensions available.
If the surface could be formed while still preserving the original contour lines, it would look much tidier. Maybe some of the lofting extensions would give better results for this. If the faces didn’t overlap into the next or previous contour, this extension would colour them in separate layers that won’t overlap in the z-axis (blue).
Now I see why the material 678 was missing. I have renamed it by mistake as 378. So I have fixed the material with the values from 378. So I have finished everything. Thanks for the job.
The coloring of faces is done with a single texture (instead of painting face by face), so that you get continuous iso-borders between colors. You can also design your palette of colors.
While I was at it, I cleaned up the contour lines and processed it with TopoShaper, and then applied the colors. I also generated the 2D color map and the legend, as well as the generated isocontours.
Hello Fredo,
is it possible to install these plugins on SU8?
One advantage of the colors in original model is that I can get height of the terrain by picking the color. I see the height when I see the color name. I’ll look on it
Thank you. So I have exchanged the black countours and I use the ones you added to separated group. My opinion is that the rainbow color is not so nice as the colors I have used before because my colors make it easier to distinguish the countours by color while the rainbow makes the color tones too fine. But I appreciate more details in the terrain.
