[REQUEST] Automatic drawing of vertical lines

todd burch

Chris, to remember user entered values across SketchUp sessions, use the Sketchup.write_defaults and read_defaults methods. Whatever you write will be written to the Windows registry or the Mac .plist file.

Pick a name (a key) wisely, like fullmer_linetool_length and store the value in a hex encoded value for best portability on both platforms. You might encounter a known bug if you don't encode a length value. (I don't remember right know if it is a dot, apost, quote or blank that causes issues on Windows.

To remember a user entered value across Tool invocations within a SketchUp session, you can just set a class variable (@@somevar) with the value you want to remember. Of course, you have to have created a class, and not just put your tool in a module...

The best design would be to do both the class variable and the xxx_defaults methods.

Panga

Hi Chris,

@unknownuser said:

@Panga Right now the script works so you input the height. The line is made so that the line is the input-height above 0. So you type 10m, the line will go to the 10m height. It doesn't go 10meters above your starting point. So if your starting point is at 5m abaove 0, and you type 10m, your line will be 5m tall. Because it will start at 5m and go to 10m for a total of 5m height. The alternative is to make it so the height entered is always the length of the line. If you start at 5m height and type 10m, your line could be 10m tall, going to an elevation of 15m. Which way is preferable to your workflow?

Definitly the second solution. I need to create vertical lines from a point with a specific lenght. So the height entered has to be the lenght of the line.

Thanks again.

Panga.

Jim

@unknownuser said:

Of course, you have to have created a class, and not just put your tool in a module...

I think a module-level variable would have sufficient scope as it would be available anywhere within the scope of the module. A module is a class, except that it can not be instantiated. So when you say you need create a class, a module will also work.


module JF
  # Don't initialize if it already has a value
  @my_var = 1 if @my_var.nil?
end

def JF.test_method
  p @my_var
end

p JF.test_method
1

This just shows you can't create an instance of a module even though it is a technically a class:


> Module.class
Class
> Class.class
Class

> Module.new.new
Error; #<NoMethodError; (eval);33; undefined method `new' for #<Module;0x7e4f2b8>>
(eval);33

> Class.new.new
#<#<Class;0x7e4e430>;0x7e4e400>

Chris Fullmer

@Panga ok, I'll aim for that.
@Jim, someday I hope to understand that

I was using instance variables, so I'll just change it over to a class variable. And I think for me right now that will do the trick - at least from activation to activation of the tool.

Chris

Chris Fullmer

@Panga, ok the script is working pretty good now. I am going to attempt to write in some code that makes it remember your last setting over SketchUp sessions. So use it, turn off sketchup and then turn it back on and it should still remember the last number you typed. That is the goal. I never did get double click to work. Oh well.

I should be done soon enough I hope,

Chris

Chris Fullmer

ok, script released here:

http://www.sketchucation.com/forums/scf/viewtopic.php?f=180&t=16923

It does not remember your settings from one SU session to another. I kept getting a lot of errors in trying to implement read_default and write default methods. And I also couldn't figure out how to encode in hex. THat is a new world to me and I didn't find anything useful (or that I understood?) in the ruby rdocs either. I think I'm done for the night, but maybe tomorrow if I get a chance, I'll try it again. Thanks for all the help everyone! Hope its useful Panga and others,

Chris

Matt666

@unknownuser said:

@Jim, someday I hope to understand that
+1

thomthom

@chris fullmer said:

ok, script released here:

http://www.sketchucation.com/forums/scf/viewtopic.php?f=180&t=16923

It does not remember your settings from one SU session to another. I kept getting a lot of errors in trying to implement read_default and write default methods. And I also couldn't figure out how to encode in hex. THat is a new world to me and I didn't find anything useful (or that I understood?) in the ruby rdocs either. I think I'm done for the night, but maybe tomorrow if I get a chance, I'll try it again. Thanks for all the help everyone! Hope its useful Panga and others,

Chris

You want to convert some data to HEX values?

Chris Fullmer

Yeah, how would I go about doing that?

Chris

thomthom

Do you want to convert numbers to hex? Or do you want to take a string and convert each byte into a hex number?

Chris Fullmer

I have no idea. I think the string idea (unless its harder to implement).

thomthom

Why do you want it as hex anyway?
Hex can only be numbers, only way to convert a string is to take each characters, get the character code which is an integer, and convert that into hex values.

I'm just wondering if hex numbers is what you want. If you want to store data to disk then you will want to store it as binary instead, as that's how data is stored anyway.

Chris Fullmer

@unknownuser said:

Pick a name (a key) wisely, like fullmer_linetool_length and store the value in a hex encoded value for best portability on both platforms. You might encounter a known bug if you don't encode a length value. (I don't remember right know if it is a dot, apost, quote or blank that causes issues on Windows.

He recommended using hex so as to not store it as a normal string since there is a chance I'll encounter a bug. I suppose binary would work? Just as long as I can get away from a normal string,

Chris

thomthom

hm... ok, you might want to probe Todd as I'm not 100% sure about this.

But converting from String to Hex-String to String, I think can be done like this:


# Pack the string to a hex string
# return value is an array with one entry
arrayData = "Hello World".unpack('H*')

Since arrayData is an array, you want to store arrayData[0].

Then when you load the string, you have to wrap it into an array again:


# storedDataString is the string you loaded
arrayData = [storedDataString] # This creates an array with the storedDataString


# Convert the Hex String back to a String;
myString = arrayData.pack('H*')

Let me know if that made any sense at all.

Chris Fullmer

Yup, that made sense (surprisingly, I'm sort of dense at times). Thanks very much Thom, I'll play with that when I get back to that part of the script. Currently trying to figure out how to average the normals of 2 planes to find a middle normal. Not having much luck so far

Chris

thomthom

I think this will work:


vector1 = face1.normal
vector2 = face2.normal
vector3 = Geom;;Vector3d.linear_combination(0.5, vector1, 0.5, vector2)

Chris Fullmer

Thanks Thom. I had tried using that earlier and it did not produce what I thought I was looking for. Seems to be working just great right now. Thanks!

Chris