Dont understand rotation

voljanko

Yes,thats it.
Thans.
Sorry for a very newby question.

voljanko

No,im not doing an animation,but only transaction.
It is strange that with move metod i have different result.
The same behaviour (not wanted)i get if i make a component in this way:

point = Geom::Point3d.new 100,0,0
vector = Geom::Vector3d.new 0,0,1
degrees = 90
angle = degrees.degrees
t = Geom::Transformation.rotation point,vector,angle

path = Sketchup.find_support_file "Bed.skp",
"Components/Components Sampler/"
definitions = model.definitions
componentdefinition = definitions.load path

instance = entities.add_instance componentdefinition, t

cjthompson

I tried some tests with your script, and I found that .transform! applies a transformation to an instance, and .move! applies a transformation to the definition.

So, if you have multiple copies, when you use move!, it will move them all to one place.

Chris Fullmer

This might use some looking into then. The Docs say that the move! method is identical to the transform! method, just it does not get applied to the undo stack, making it nice for animations.

Seems like it should not mess around with definitions or instances differently. interesting,

Chris

markozeta

This seems like a trig problem

.move! may require angle in degrees - DCs use degrees exclusively for all their trig work.

.transform! may require the angle in radians.

Try changing to "angle = degree" with .move! and see if that fixes it.

Mark

Jim

move! is mis-documented or buggy, or both. I think move! is expecting a Point3d object to move the Grouponent to, because it sure acts strange otherwise.

I posted a little more here: http://forums.sketchucation.com/viewtopic.php?f=180&t=17047&p=166900&hilit=move#p166900

markozeta

@jim said:

Grouponent

Nice

Jim

I thought it was a great blend, but I can't take credit for it. I saw it in someone's source code. Fredo, I think.

tomot

I'm in the process of making a Bifold door ruby: with 2 options open or closed
the open door position are 60 degrees. Ruby excepts only radians!

ie

pi = 3.141592653589793  # 180 degree angle = pi radians 
pi6 = 1.047             #  60 degree angle = pi*0.6666/2   


#-----rotation is about point $pt00 and about the blue axis 60 degrees
t = Geom;;Transformation.rotation($pt00,Geom;;Vector3d.new(0,0,1), -pi*0.6666/2)
group.move!(t)

thomthom

60.degrees
http://code.google.com/intl/nb/apis/sketchup/docs/ourdoc/numeric.html