[REBOL] deceleration !

From: frederic::email::wanadoo::fr at: 10-Oct-2002 17:35

Hi all !!

i'm new in rebol and i'm not good in english so i'd try to be clear.

I just test a script from auverlot's book, here it is :

**********
REBOL []
pos-xy: none
view layout [
   b: box 400x400 white feel [
      detect: func [face event] [
         switch event/type [
            move [
               pos-xy: event/offset
               append b/effect/draw reduce [pos-xy]
               show b
            ]
            down [
               pos-xy: event/offset
               append b/effect/draw reduce ['circle pos-xy 30 'line]
               show b
            ]
            alt-down [
               append b/effect/draw reduce ['fill-pen (random 255.255.255)
'line]
            ]
         ]
      ]
      redraw: none
   ] effect [draw ['pen black 'line]]
]
************

So first when i moved around the mouse over the box very fast the pen seems
to follow very good.
but if i click down just one time (a circle is paint in the box), then
suddenly the pen seems to
be late. if i stop move the mouse, the pen ends up arriving, and if i move
fast again, the pen is
always late.

I don't understand why a simple draw circle command in a dynamic drawing
decrease the drawing performance.

I hope that you've understand my question. Thanks in advance to all.

Fred.

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