Making a SketchUp tool - incorporating the mouse & keyboard

[BTM]

Okay. Here's my big issue, I knew I'd end up having.

this is the part I added to the end of the elsif in onLButtonUp:
prompts = ["Radius="] defaults = [ 0.0.to_l] list = [""] results = UI.inputbox prompts, defaults, list, "Please input desired radius." @rad= results

Now, HOW can I go through all the active points in the model**(to see which ones are within the distance of @rad from @cpoint2 in the future)**? I can't use .typename, because endpoints aren't really entities, so I'm stuck.

[Chris Fullmer]

This is what I use to iterate through a model for vertices.

ents = Sketchup.active_model.active_entities
verts = []

ents.each do |e|
 if e.typename == "Edge"
  verts << e.start
  verts << e.end
 end
end

verts.uniq!

That adds every start vert and every end vert to the array, then .uniq! removes all duplicates.

Now you have an array of all vertices in an array. This is the transformation method you will need to use in this script:

http://code.google.com/apis/sketchup/docs/ourdoc/entities.html#transform_by_vectors

There's lots of ways to transform things, but most of them transform one object at a time, which won't work for what your doing (I don't think it will at least). So this transform is cool because it does it all at once. What you need to create is an array of vectors that correspond to your array of vertices. The vector should be the vector that your vertex will move. Hope that helps with the next step,

Chris

[BTM]

Ah, thanks for that! I don't see why google doesn't just add a method in entities for vertices (Or whatever they're called, points). Heck, they should have it so you can select them with the selection tool IMHO. Anyways, thanks again; I would have been ages trying to figure that out

[thomthom]

@chris fullmer said:

That adds every start vert and every end vert to the array, then .uniq! removes all duplicates.

Have you ever used the Set class to keep track of objects? http://code.google.com/apis/sketchup/docs/ourdoc/set.html
I haven't, but I have a feeling it could be useful for this as it's supposed to only allow unique objects in the list.

[Chris Fullmer]

Oh really? That's cool. I have used it once in a script, but I didn't realize it would not allow duplicates.

I'm going to go read through that Class again. Sounds like it might be more helpful than I had realized. Thanks Thom,

Chris

[BTM]

... Just found another problem

How do you turn @rad, which ends up as an array with the length in inches in it, back into a length?
i.e. @rad = results.to_l doesn't work.

[Chris Fullmer]

That's what I was saying was the problem in that first bit of script you showed - you can't vconvert an array to_i, or to_l. I'm not sure why it was working on your end. Its ok though, its an easy solution.

So results is an array of whatever was in the inputbox. In that array, the radius is in the zero position. So when you save @rad, just convert it to a length:

@rad = results[0].to_l

Now @rad is not an array. Its just a length. Hope that helps,

Chris

[BTM]

[0]. Man, I KNEW it was going to be something completely obvious. The first item in the array! Why can't I think of these things!

[BTM]

Issue I'm having NOW. How to implement .transform_by_vectors. I have the Set I want to transform, @dvert, and the vector, @vect (Will add math to it later), but I don't know how to get it to work.

I've tried @ent.transform_to_vectors @dvert, @vect, @dvert.transform_to_vectors @vect, etc., etc.

[Chris Fullmer]

You're really close. It looks like the @verts should be populating correctly. And also @dvert looks like its being populated correctly too.

The line @vect = cpoint.vector_to @cpoint2 wont work because your @vect has to be an array of vectors (not just a single vector) with the same amount of elements in it as your @dverts. So after setting the @dvert Set, you need to iterate through them and define a vector for each that will tell it how far to move. Lets try it without math at first. Here is an example.

@dvert.each do |e| @vect.insert e.position.vector_to [0,0,0] end

So now you have a Set of vertices (lets say there are 30 of them in that array). And you also have the @vect Set and it has 30 vectors, and they correspond with the vertices in @dvert. That is what you need to give to the transform_by_vector. So your transform_by_vectors is:

@ents.transform_by_vectors @dverts.to_a, @vect.to_a

I'm not sure that you need to the .to_a conversion on those, but I think you might because they are actually sets, not arrays. And transform by vectors is expecting to get arrays.

Hope that makes sense (and I hope its right, I haven't tested that code)

Chris

[RickW]

Chris,

If BTM has certain of my scripts installed, he will have array_to.rb which adds methods .to_i and .to_f to the Array class to convert all members to integers or floats. That could be why array.to_i worked for him and not for you.

[Chris Fullmer]

OHH!! I get it now. I couldn't think of what would make that work for him. Thank you for explaining that one Rick.

I also could never quite figure out what that script did (before I had started using Ruby). It all makes sense now, thanks for the heads up Rick!

Chris

[BTM]

I think I'm close, but it still isn't working.

` %(#600000)[****require "sketchup.rb"
#-------------------------------------------------------------------------------
class Pinchmover
#-------------------------------------------------------------------------------
def activate
@model = Sketchup.active_model
@ent = @model.entities
@view = @model.active_view
@slct = @model.selection
@slct.clear
@vect = Set.new
@verts = Set.new
@dvert = Set.new

- - - - - - - - - - - - - - - - - - - -

	@thing = 0

- - - - - - - - - - - - - - - - - - - -

	end

#-------------------------------------------------------------------------------
def onLButtonUp(flags, x, y, view)

- - - - - - - - - - - - - - - - - - - -

		if @thing == 0
		ip1 = view.inputpoint x,y
		pt1 = ip1.position
		pt2 = Geom::Point3d.new pt1
		@cpoint = @ent.add_cpoint pt2
		@thing = 1
		end

- - - - - - - - - - - - - - - - - - - -

		if @thing == 1
		ip2 = view.inputpoint x,y
		pt3 = ip2.position
		pt4 = Geom::Point3d.new pt3
		@cpoint2 = @ent.add_cpoint pt4

- - - - - - - - - - - - - - - - - - - -

			prompts = ["Radius="]
			defaults = [ 0.0.to_l]
			list = [""]
			results = UI.inputbox prompts, defaults, list, "Please input desired radius."
		@rad= results[0].to_l

- - - - - - - - - - - - - - - - - - - -

			@ent.each do |e|
				if e.typename == "Edge"
				@verts.insert e.start
				@verts.insert e.end
				end
			end

- - - - - - - - - - - - - - - - - - - -

			@verts.each do |v|
			dist = v.position.distance @cpoint.position
				if dist < @rad
				@dvert.insert v
				end
			end

- - - - - - - - - - - - - - - - - - - -

			@dvert.each do |d| # Doesn't seem to work.
			vec = @cpoint.position.vector_to @cpoint2.position
			@vect.insert vec
			end
		@affected = @ent.transform_by_vectors @dvert.to_a, @vect.to_a
		@thing = 2
		end

- - - - - - - - - - - - - - - - - - - -

	end

#-------------------------------------------------------------------------------
end
#-------------------------------------------------------------------------------
plugins_menu = UI.menu("Plugins")
item = plugins_menu.add_item("Pinch Mover") {
Sketchup.active_model.select_tool Pinchmover.new
}****]`

... WHY can't I get it to work? I really think the biggest problem could be in how it's set up overall, or in the last few lines, but can't be sure. I've been trying to get it to work on my own for some time now, to no avail. Anyone know what I've done completely wrong?

[Chris Fullmer]

I couldn't identify the problem, but I got it to work just as soon as I made all the sets be regular arrays. And also I hod to take the first if @thing=1 group and move that down below the rest of the code in the method. Otherwise it wasn't letting me input 2 cpoints.

And lastly the @cpoint.vector_to @cpoint2 - those two points should be reversed. You want to move from cpoint2 toward @cpoint.

That got some things working for me when I made those couple of changes. See if that helps?

Chris

[Chris Fullmer]

How this coming, any luck getting it to work yet?

Chris

[BTM]

Still no luck. It's weird though; you said that code didn't allow you to place 2 c.points? It worked for me, except for the transformation, and the parts with the Sets works in the Webdialogue box. Also, the changes you were talking about didn't seem to fix it.

[Chris Fullmer]

Here is your code how I tweaked it. I think all I did was move the if @thing == 0 to the bottom and then changed all the sets back to arrays and then made the @vert array uniq!. SO look this over and compare it to yours. See if that helps.

require "sketchup.rb"

class Pinchmover
def activate
	@model = Sketchup.active_model
	@ent = @model.entities
	@view = @model.active_view
	@slct = @model.selection
	@slct.clear
	@vect = []
	@verts = []
	@dvert = []
	@thing = 0
end

def onLButtonUp(flags, x, y, view)

	if @thing == 1
		vec=[]
		ip2 = view.inputpoint x,y
		pt3 = ip2.position
		pt4 = Geom;;Point3d.new pt3
		@cpoint2 = @ent.add_cpoint pt4
		prompts = ["Radius="]
		defaults = [ 0.0.to_l]
		list = [""]
		results = UI.inputbox prompts, defaults, list, "Please input desired radius."
		@rad= results[0].to_l

		@ent.each do |e|
			if e.typename == "Edge"
				@verts << e.start
				@verts << e.end
			end
		end
		@verts.uniq!
		@verts.each do |v|
			dist = v.position.distance @cpoint.position
			if dist < @rad
				@dvert << v
			end
		end

		@dvert.each do |d| # Doesn't seem to work.
			vec = @cpoint.position.vector_to @cpoint2.position
			@vect << vec
		end
		Sketchup.active_model.entities.transform_by_vectors @dvert, @vect
		@thing = 2
	end
	
	if @thing == 0
		ip1 = view.inputpoint x,y
		pt1 = ip1.position
		pt2 = Geom;;Point3d.new pt1
		@cpoint = @ent.add_cpoint pt2
		@thing = 1
	end
end
end

Sketchup.active_model.select_tool Pinchmover.new

Chris