View.refresh behavior

mptak

mod = Sketchup.active_model # Open model
ent = mod.entities # All entities in model
sel = mod.selection # Current selection
view = mod.active_view
tran1a=[1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1]
tran1=Geom;;Transformation.new(tran1a)
tran2a=[5200,0,0,0,0,75,0,0,0,0,1,0,0,0,0,1]
tran2=Geom;;Transformation.new(tran2a)
for i in 1..100 do
    tr=Geom;;Transformation.interpolate(tran1,tran2,i*0.01)
    ent[0].transformation=tr
    newview=view.refresh
    sleep 0.01
    puts i
end

This does not seem to refresh the screen with every view.refresh. Any suggestions/explanations?
(for this application the intent is to growing a unit cube(the first entity) which I intended to iterate in 100 steps.

Anton_S

There are two things happening here:

The view is redrawn every time you assign transformation to the object via the ent.transformation= function; Use ent.move! new_tra instead if you want to use view.refresh function as the only function for redrawing the view.
Your timestep is a little too small. From my experiences on my PC, I figured min refresh delay is 1/64, which is ~0.016 seconds, while your refresh delay is 1/100 (0.01). That's why your view is not always refreshed I suppose. I got 1/64 from calculating timestep in view animation nextFrame function. I think view.refresh and nextFrame are interconnected, but I have not done tests particularly with the view refresh function, so this second point could be false.

thomthom

For animations it's best to use the Animation class instead of using sleep() and forcing a screen refresh.
http://www.sketchup.com/intl/en/developer/docs/ourdoc/animation