fxruby-users

[Fxruby-users] FXGLViewer#translate

[Joel V. <vj...@PA...>]

I want to change the viewer's position, and #translate is what seems to 
do it in Fox. At least, that's how right-click-and-drag is implemented. 
But calling translate thru the FXRuby interface doesn't seem to have any 
effect. Anyone know how to do this?

Re: [Fxruby-users] FXGLViewer#translate

[Joel V. <vj...@PA...>]

Joel VanderWerf wrote:
> 
> I want to change the viewer's position, and #translate is what seems to 
> do it in Fox. At least, that's how right-click-and-drag is implemented. 
> But calling translate thru the FXRuby interface doesn't seem to have any 
> effect. Anyone know how to do this?

Just to be more precise, I applied the following patch to glviewer.rb. 
The zoom changes, but not the viewer position.

--- glviewer.rb 2003-06-11 14:28:34.000000000 -0700
+++ glviewer-test.rb    2003-06-16 18:47:03.000000000 -0700
@@ -254,6 +254,9 @@
      viewer = FXGLViewer.new(mdichild, @glvisual, self, ID_GLVIEWER,
        LAYOUT_FILL_X|LAYOUT_FILL_Y|LAYOUT_TOP|LAYOUT_LEFT)

+    viewer.zoom = 2
+    viewer.translate FXVec.new(100,100,100)
+
      # Tab book with switchable panels
      panels = TabBook.new(frame, @mdiclient)

Re: [Fxruby-users] FXGLViewer#translate

[Lyle J. <jl...@cf...>]

Joel VanderWerf wrote:

>> I want to change the viewer's position, and #translate is what seems 
>> to do it in Fox. At least, that's how right-click-and-drag is 
>> implemented. But calling translate thru the FXRuby interface doesn't 
>> seem to have any effect. Anyone know how to do this?
> 
> 
> Just to be more precise, I applied the following patch to glviewer.rb. 
> The zoom changes, but not the viewer position.

FXGLViewer#create calls #setBounds, which in turn resets the model's 
center to its original position (i.e. the center of the bounding box for 
the model). So the effects of your call to FXGLViewer#translate are 
wiped out before you get a chance to see them.

Try moving the call to #translate to some point *after* the window has 
been created. As a quick hack to the glviewer.rb example program, try 
replacing one of the menu item's callbacks with a call to translate, e.g.

     openCmd.connect(SEL_COMMAND) {
       viewer.translate(FXVec.new(2, 2, 2))
     }

If you want the model to start out "translated", I suppose you can also 
subclass FXGLViewer and override its #create method.

Hope this helps,

Lyle

Re: [Fxruby-users] FXGLViewer#translate

[Joel V. <vj...@PA...>]

Lyle Johnson wrote:
> FXGLViewer#create calls #setBounds, which in turn resets the model's 
> center to its original position (i.e. the center of the bounding box for 
> the model). So the effects of your call to FXGLViewer#translate are 
> wiped out before you get a chance to see them.

Ah, that makes sense. Thanks. I'll put the call at the end of my 
scene-generating code.