Re: Drawing speed in rev 2.8
Message: 4 Date: Mon, 04 Jun 2007 10:49:15 -0700 From: Scott Rossi <[EMAIL PROTECTED]> Subject: Re: Drawing speed in rev 2.8 To: How to use Revolution Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset="US-ASCII" Recently, James Hurley wrote: I've just moved over to 2.8 and have found a significant loss of speed in drawing with the pencil tool. Does anyone have any idea why the handler below would take 88 ticks in 2.7, but 302 ticks in 2.8? I see the same speed you describe in 2.8.1. Not sure why there is a difference compared to older versions, but the following could be a workaround for you, plus allow you to somewhat control the speed at which the drawing is completed. [ between the NEW comments ] on mouseUp put the ticks into tStartTime repeat while the number of images >0 delete image 1 end repeat put the width of this card/2 into x0 put the height of this card/2 into y0 put 0 into x put 0 into y put 2 into tStep put 0 into tAng put pi/180 into radPerDeg choose the pencil tool -- BEGIN NEW put "" into tLocked repeat with tAng = 1 to 360 if tAng mod 8 <> 0 then -- HIGHER NUMBER = FASTER DRAW RATE if not tLocked then lock screen put true into tLocked end if else unlock screen put false into tLocked end if -- END NEW put tStep* cos(radPerDeg* tAng) into dx put tStep * sin(radPerDeg * tAng) into dy drag from round(x0+x),round(y0+y) to round(x0+x+dx), round(y0+y +dy) add dx to x add dy to y end repeat choose the browse tool put the ticks - tStartTime into msg box end mouseUp Regards, Scott Rossi Creative Director Tactile Media, Multimedia & Design Thanks Scott. You suggestion is very helpful in speeding up this particular handler. Unfortunately the handler was only meant to be an illustration of a problem that occurs in a wide variety of routines using the pencil tool to draw with. This four-fold drop in speed is a serious blow to my Turtle Graphics programs. I will submit a request to bugzilla that the pencil tool be resuscitate in 2.8. Thanks, Jim Hurley ___ use-revolution mailing list use-revolution@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Drawing speed in rev 2.8
Recently, James Hurley wrote: > I've just moved over to 2.8 and have found a significant loss of > speed in drawing with the pencil tool. > > Does anyone have any idea why the handler below would take 88 ticks > in 2.7, but 302 ticks in 2.8? I see the same speed you describe in 2.8.1. Not sure why there is a difference compared to older versions, but the following could be a workaround for you, plus allow you to somewhat control the speed at which the drawing is completed. [ between the NEW comments ] on mouseUp put the ticks into tStartTime repeat while the number of images >0 delete image 1 end repeat put the width of this card/2 into x0 put the height of this card/2 into y0 put 0 into x put 0 into y put 2 into tStep put 0 into tAng put pi/180 into radPerDeg choose the pencil tool -- BEGIN NEW put "" into tLocked repeat with tAng = 1 to 360 if tAng mod 8 <> 0 then -- HIGHER NUMBER = FASTER DRAW RATE if not tLocked then lock screen put true into tLocked end if else unlock screen put false into tLocked end if -- END NEW put tStep* cos(radPerDeg* tAng) into dx put tStep * sin(radPerDeg * tAng) into dy drag from round(x0+x),round(y0+y) to round(x0+x+dx), round(y0+y+dy) add dx to x add dy to y end repeat choose the browse tool put the ticks - tStartTime into msg box end mouseUp Regards, Scott Rossi Creative Director Tactile Media, Multimedia & Design ___ use-revolution mailing list use-revolution@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution
RE: Drawing speed
On Fri, 22 Feb 2002 Jim Hurley <[EMAIL PROTECTED]> wrote: > Subject: Drawing speed > Reply-To: [EMAIL PROTECTED] > > > Jim Hurley wrote: > > > > > There appears to be no remedy in the offing to the speed problem. > > Scott Rainey wrote: > > >Actually the current release is pretty close to HC in performance, > >the primary remaining difference being due to running in color vs > >black and white (anywhere from 8 to 32 times as much data to move > >around, you know). > > I concede the difficulties in speedily running color vs. black and > white, and the improvement in the current release is much > appreciated. However there remains a considerable gap between MC/RR > and HC. For example, the following script draws concentric boxes of > ever decreasing size. > > on mouseUp >clean >put 100 into a >put 300 into b >put 2 into da >choose the line tool >put the ticks into startTime >repeat 50 --draw boxes of ever decreasing size > drag from a,a to b,a > drag from b,a to b,b > drag from b,b to a,b > drag from a,b to a,a > add da to a > subtract da from b >end repeat >put the ticks - startTime into field 1 >choose the browse tool > end mouseUp > > on clean >repeat until the number of images = 0 > delete image 1 >end repeat > end clean > > This script takes 265 ticks on average in RR and 30 ticks in HC on > cards of identical size. Hmm, looks to be about a factor of 8, which is pretty good considering there's about 32 times as much data being moved around (assuming you're running in "millions" screen depth). Further confirmation that the limit is just with the data size is to increase (or decrease) the size of the window or image: doubling it in width and height increases the time by just about a factor of 4, demonstrating that all the time is in moving the bits around. > (I realize that this can be done more > efficiently with the rectangle tool and that a graphic would be > faster than an image. My purpose was to measure the drag speed. ) > The discrepancy would be less in Windows. Much less, actually. I get 16 ticks on my 733MHz PIII. We don't know why masked image drawing is so slow on MacOS (hell, it's slow even compared with UNIX/X11 which doesn't even *have* a masked image drawing primitive and it has to be done with 3 separate operations there), but unfortunately there's not a damned thing we can do about it. > There is no limit to the greedy demands which we, the users, put on > Scott and the development team. In my case, to properly implement > Turtle Graphics, I hunger for a speedy monochromatic drawing mode. Unfortunately that's not the business we're in, and I doubt even that would be a satisfactory solution to the problem even if we were (i.e., even the various Logo implementations all support color now). But this is the perfect situation in which to use an external. You could probably get 2 orders of magnitude better performance if you just drew directly to the window instead of having everything buffered like painting in HC and MC require. You do lose the ability to overlay images on buttons and fields, persistence, and the ability to edit the bits you've previously drawn, but fortunately none of these things are required for turtle graphics. You might try M. Uli Kusterer's ([EMAIL PROTECTED]) xDraw package, for example, or ask him if he has other suggestions for how best to do this. Regards, Scott > Jim Hurley Scott Raney [EMAIL PROTECTED] http://www.metacard.com MetaCard: You know, there's an easier way to do that... ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Drawing speed
On Friday, February 22, 2002, at 06:22 AM, Jim Hurley wrote: > I concede the difficulties in speedily running color vs. black and > white, and the improvement in the current release is much appreciated. > However there remains a considerable gap between MC/RR and HC. For > example, the following script draws concentric boxes of ever decreasing > size. > > on mouseUp > clean > put 100 into a > put 300 into b > put 2 into da > choose the line tool > put the ticks into startTime > repeat 50 --draw boxes of ever decreasing size > drag from a,a to b,a > drag from b,a to b,b > drag from b,b to a,b > drag from a,b to a,a > add da to a > subtract da from b > end repeat > put the ticks - startTime into field 1 > choose the browse tool > end mouseUp > > on clean > repeat until the number of images = 0 > delete image 1 > end repeat > end clean > > This script takes 265 ticks on average in RR and 30 ticks in HC on > cards of identical size. (I realize that this can be done more > efficiently with the rectangle tool and that a graphic would be faster > than an image. My purpose was to measure the drag speed. ) The > discrepancy would be less in Windows. Since I'm fairly entrenched in graphics work, this post caught my eye. One thing you need to keep in mind with MC/REV is that usually, not always, but usually there are similar ways to achieve what you've done before using alternate methods. For example, I ran the above script and timed a rough average of 111 ticks. Then instead of choosing the line tool, I chose the pencil tool, and drawing time was reduced to 37 ticks. Adding a "lock screen" reduced the overall time to 9 ticks -- virtually immediate. > In my case, to properly implement Turtle Graphics, I hunger for a > speedy monochromatic drawing mode. I seem to recall my experience in Turtle Graphics (around 20 years ago!) involving the creation of a list of points that the "Turtle" then rendered by dragging from point to point, with pen up and pen down instructions. I would imagine the above mentioned pencil tool will achieve what you need with no time penalty. And also you get the benefit of color (back in those days the only screen color was phosphorescent green...). Hope this helps. Regards, Scott Rossi Creative Director, Tactile Media [EMAIL PROTECTED] http://www.tactilemedia.com ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
RE: Drawing speed
Interesting little speed test, I get 102 ticks in MC on a 933MHz Pentium 3, and 161 ticks on a 400MHz B&W G3 (with Retrospect running in the background). Try running in thousands of colors instead of millions, and you should see a good speed increase from your 265 ticks. -Glen Yates Jim Hurley wrote: >I concede the difficulties in speedily running color vs. black and >white, and the improvement in the current release is much >appreciated. However there remains a considerable gap between MC/RR >and HC. For example, the following script draws concentric boxes of >ever decreasing size. <<>> >This script takes 265 ticks on average in RR and 30 ticks in HC on >cards of identical size. (I realize that this can be done more >efficiently with the rectangle tool and that a graphic would be >faster than an image. My purpose was to measure the drag speed. ) >The discrepancy would be less in Windows. ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
