[Plugin] Boolean helper update 08122011

TIG

Liquid98
Using
Geom::Transformation.scaling nnnnn
scales everything by nnnnn, probably using its 'bounds.min'
To do the scaling about the ORIGIN - which won't vary and therefore won't move stuff unexpectedly you should use
Geom::Transformation.scaling(ORIGIN, nnnnn)

liquid98

@tig said:

Liquid98
Using
Geom::Transformation.scaling nnnnn
scales everything by nnnnn, probably using its 'bounds.min'
To do the scaling about the ORIGIN - which won't vary and therefore won't move stuff unexpectedly you should use
Geom::Transformation.scaling(ORIGIN, nnnnn)

TIG, thanks for the suggestions, I am fully aware of the fact that
Geom::Transformation.scaling(ORIGIN, nnnnn) will scale
scale everything by nnnnn. With nnnnn as a variable.

But the problem is that i like 1000 while other people prefer 10, and I don't want to
work with a dialog box for user input because than you have to make that choice every time
you use script.
So the best case would be that the user sets the scale factor to what he likes and than the script has to remember the scale factor after sketchup is shut down.

TIG

The reason I used 'nnnnn' wasn't because I was suggesting you used a variable... I was showing how to 'anchor' your scaling to the ORIGIN... and because two versions of the scaling transformation are used I didn't want to illustrate one of them in preference to the other!
What you could do is set a 'global value' [$] outside of the script code parts, at the beginning; then users can easily find and edit that one part in the script if they want say x 100 instead of 1000
e.g. $liquidsscalefactor=1000
Then in your 'scale up' part you have
Geom::Transformation.scaling(ORIGIN, $liquidsscalefactor)
and in your 'scale down' part you have
Geom::Transformation.scaling(ORIGIN, 1.0/$liquidsscalefactor)

note the 1.0 to force a float if the $ value is an integer

You could change the menus too...
e.g. UI::Command.new("Scale factor "+$liquidsscalefactor.to_s){Bhelper::Groter.new()} to show the current value set...

An alternative to the global $ variable is to use Sketchup.read_default('liquidsscalefactor','value') and Sketchup.write_default('liquidsscalefactor','value',nnnnn) to get/set a value with Sketchup that is always used - here replaced by 'nnnnn' in the 'write' part.
You have a test that says if it's not set [first run] it's 'written' to be '1000'.
Else it's set to what is 'read'; with .to_f to convert it from a string to a float value.
You also add an extra item to your menu 'Set scale factor' - this opens a simple dialog and lets the user enter a value like '100' [as a string] - it's written to Sketchup as shown above and re-read back [with .to_f] when you use either of the other two options, to scale up/down... The value that we get from Sketchup.read_default() is remembered across sessions and common in all SKPs until the user resets its value...

liquid98

Hi TIG, I did some experiments today,

I understand what you mean about the transformation. Using 1.0/nnnn and nnnn is just more convenient..

Setting a global variable was easy. And worked right away. But I also read some wiki that said : "avoid global variables!! ". Is that why you give it ($liquidsscalefactor)such a long name?

Getting a variable from input: also easy.

But to get my variable lsf in to the two classes Kleiner
and Groter, is something I don't understand.
My input method is like this:

` class Getinfo

def initialize() 

	prompts = ["Enter scalefactor   "]
	values = [1000]
	
	results = UI.inputbox prompts, values, "Scalefactor."
	return if not results
	@lsf, = results
	
	UI.messagebox @lsf.class

end

end`

@lsf in Getinfo is a Fixnum class, is that alright?
But in my two classes @lsf is NilClass (empty)

I tried also $lsf and @@lsf.

Any help???

I attached the file I'm working on..

PS:TIG, Realy cool you put all that effort in helping people with ruby and Sketchup! I'm sure lots of people can learn from your posts!

booleanhelper_unf.rb

TIG

For a @@ variable to be accessible it has to be within the same 'class' - you have set three separate classes so @@ won't work between them - you need a $ global version...

Because it's a global variable I suggested a 'long name' that's highly likely to be used by anyone else and cause unexpected conflicts...

To make a variable that's remembered during that Sketchup session across the classes, you set it in the module using the '$' type... E.G.
$liquidsscalefactor=1000.0
written within the 'module' BUT outside the class/def's, I.E. as you have done, BUT you need to remove the '#'
Note also how I've set it as a 'float' rather than an 'integer' by adding '.0' to the end - it's safer when doing division etc as 1/100 >>> 0 but 1/100.0 >>> 0.01
This sets the value of the scaling for that Sketchup session and it is remembered across uses of the three tools.
You then need to change the dialog part to [re]set it thus...
values = [$liquidsscalefactor]
and then later...
$liquidsscalefactor, = results
OR alternatively you could write it as...
$liquidsscalefactor = results[0]

Whenever you open Sketchup it starts at 1000, but any new value is remembered thereafter.
The 1000 value is reverted after a close and reopen of Sketchup.
You CAN save the value permanently so that it is always remembered between sessions using Sketchup.write_default/read_default etc... but that's for another day once you get this method working

liquid98

Hi TIG,

implemented the global variable, works great!

I see: the @@variable is only valid within a class right?

Questions

Is results[0] an element of an array? Are all these results of the inputbox stored during the session?

$booleanhelperscalefactor, = results , if I omit the , $booleanhelperscalefactor becomes an array, why?

To give extra info about the scale-factor I adapted the code like this:

cmd = UI::Command.new("Scale factor "+$booleanhelperscalefactor.to_s) {Bhelper::Groter.new() } cmd.small_icon = File.join(imgdir, "bigger.png") cmd.large_icon = File.join(imgdir, "biggerL.png") cmd.tooltip = ("Scale factor "+$booleanhelperscalefactor.to_s) cmd.menu_text = ("Scale factor "+$booleanhelperscalefactor.to_s)

The text sticks to the initial value of $booleanhelperscalefactor, when i change the scalefactor in sketchup the tooltip and menu-tekst won't change.

Thnx for your help.

By the way, I found the Automatic_SketchUp pdf document, a good resource!

TIG

'results' IS returned as an array - that's why
you can get the contents of an array in several ways
array=[0,1,2,3]
a,b,c,d = array
a

0
b
1
etc
OR as
a=array[0]
a
0
IF you have a ONE element array like yours
xxx = results[0]
is exactly the same as
xxx, = results
as xxx is set the the first [0] element in both cases...

The cmd tooltip is set at the moment the the cmd is defined - so it shows the then current scalefactor.
When you change the scale factor you don't change the then defined details.
You COULD set the cmd as a $ variable so you know its 'handle' - use an unusual reference - say $cmdbooleanhelperscalefactor - When you change the scalefactor in the dialog also add a lie saying
$cmdbooleanhelperscalefactor.tooltip = ("Scale factor "+$booleanhelperscalefactor.to_s)
Not sure it'll work BUT you can see how it might be construed......

liquid98

Hi TIG!

I learned a lot today; and

I got it all working!!!!

Thanx a lot for your help!

I have two final questions though:

(1)
sfa = Sketchup.read_default('liquidsscalefactor','value') sff = sfa[0].to_f . . . trans = Geom::Transformation.scaling(ORIGIN, 1.0/sff)

Is there a more elegant solution to convert sfa to a floating value?

(2)
And I don't understand why sftt is not updating when the scalefactor (sfa) is set??
sfa = Sketchup.read_default('liquidsscalefactor','value') sftt = sfa[0].to_f . . . cmd.menu_text = ("Scale down with factor #{sftt}")

TIG

Little more elegant way...
I would add the optional third part to the read_default as '0'
Then sff=1000.0 if sff==0.0
I don't see any ' write_default' code ?
When the dialog changes the sf value the ' liquidsscalefactor' needs to be [re]written...

liquid98

Hi TIG,

@unknownuser said:

I don't see any 'write_default' code ?

My complete code is now attached in the rb-file below....

Am I right? It has to be:

sfa = Sketchup.read_default('liquidsscalefactor','value', 0) sff = sfa[0].to_f

Instead of that I was looking for a more elegant solution like:

sfa = Sketchup.read_default('liquidsscalefactor','value', 0).to_f

but that's not possible?

TIG, Thnx for your help once again, I lost count already

booleanhelperunf1

TIG

Your
sfa = Sketchup.read_default('liquidsscalefactor', 'value', 0).to_f
will work without intermediate steps... although I'd set the fall-back option to '0'.

liquid98

@tig said:

Your
sfa = Sketchup.read_default('liquidsscalefactor', 'value', 0).to_f
will work without intermediate steps... although I'd set the fall-back option to '0'.

I got it working like this:

sf = (Sketchup.read_default 'liquidsscalefactor', 'value', '0')[0].to_f

final code in first post. Thnx!

TIG

Should NOT need the [] - the returned value should be a string ''

ken

Downloaded the latest version. Here what is happening.

If you don't put a value to the scale, the model disappears.
The model does not stay at it's present locations like the previous version did.

Ken

TIG

The scale should default to 1000 if it's not set, or to another value if it has been set before...

liquid98

Hi Ken, you were right! Thanx for the feedback

Solved both problems,

It's only possible to enter a number > 0

You now can choose between scale about origin or scale about object's center.
The default is to scale about the object's center. If you want to change that, open the ruby-file and uncomment
(remove the #) the first line of code. Please reboot ruby to make it work.

Latest version in topic-start

liquid98

Hi TIG,

Would you be so kind to inspect my code briefly to see if there are things that could be done in a better way or are
actually wrong but function by accident?? (code in first topic)

And a question

The script accepts only input if its a number > 0 It accepts for instance numbers like 1.90.
But it also accepts numbers like 1,90. Nothing happens then when you
try to use it.
How can I filter this kind of input?

I other words, how do I program this:


@@x = 1,90
If x contains  ','
do something

?

Thank you

TIG

Try these tweaks
module Bhelper sf = **'1000.0'**
To make it a 'string'.
Then
@@sf = Sketchup.read_default('liquidsscalefactor','value'**,'1000.0'**)**.to_f**
to trap for it not having set [should never happen!] and .to_f to turn the read string into a 'float'.
You don't need
@@sf = results.to_s.to_f
as it's now already a float, and should be got thus from the input @@sf=results[0]
@@sf = results is wrong/duplicated AND also
Sketchup.write_default('liquidsscalefactor','value',@@sf**.to_s**)
should be inside the 'begin' section, otherwise it 'fires' even after an error.

In your two similar classes
def initialize() sf = (Sketchup.read_default 'liquidsscalefactor', 'value', '0')[0].to_f
should both become
def initialize() sf = (Sketchup.read_default 'liquidsscalefactor', 'value', '1000.0')**.to_f**

ken

Well I tried again. This time I get the error code "NilClass"

Ken

TIG

Ken

Please bear with him...
This is his first Ruby and whilst it is a good idea it needs some 'fine tuning'