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"undo" noStroke() (Read 1347 times)

volts YaBB Newbies Offline Posts: 27 Canada	"undo" noStroke() Sep 8^th, 2008, 7:57pm I am trying to write a reusable function to draw a texture mapped shape without the outline, and then restore to the state (color, width) before the call. In other words I want to undo noStroke(). Any suggestions on how to do this? Thanks...

PhiLho YaBB Moderator Offline Posts: 4190 Near Paris (France)	Re: "undo" noStroke() Reply #1 - Sep 9^th, 2008, 11:07am A dirty way is to use: g.stroke = true; It is the exact counterpart of noStroke() action. It is dirty because this public variable is marked (in a comment) as "read-only"... Not sure if there is a cleaner way (there should be a pushContext()/popContext(), perhaps, to save and restore stroke/fill/weight/etc. info).
	« Last Edit: Sep 9^th, 2008, 4:35pm by PhiLho »

volts YaBB Newbies Offline Posts: 27 Canada	Re: "undo" noStroke() Reply #2 - Sep 9^th, 2008, 3:33pm Thanks very much. Saving and restoring g.stroke does the trick. The Javadoc fooled me into thinking it was read-only. I'm trying to write a library; something like push/popContext() might be less vulnerable to changes in PGraphics.

fry

Re: "undo" noStroke()
Reply #3 - Sep 9^th, 2008, 7:03pm

nope, they *are* read-only, you'll get different results depending on the renderer. no foolin'. (now you behave, otherwise i'll take em away or make you use an accessor method.)

the proper method is to use:
Code:

boolean savedStroke = g.stroke;
int savedStrokeColor = g.strokeColor;

then to restore:
Code:

if (savedStroke) {
  stroke(savedStrokeColor);
} else {
  noStroke();
}

we're likely adding a push()/pop() like you describe, perhaps even in time for 0149, since it's generally useful and needed internally as well. the amount of state info is quite large.

volts YaBB Newbies Offline Posts: 27 Canada	Re: "undo" noStroke() Reply #4 - Sep 9^th, 2008, 9:55pm Thanks, I'll follow your advice. Dire measures are unnecessary

Jo Wood Junior Member Offline Posts: 52	Re: "undo" noStroke() Reply #5 - Sep 10^th, 2008, 7:22am This may become redundant in the light of Fry's comment about version 149, but I have been using my own style stack for this purpose. I think it covers all the rendering style settings available, but I may have missed a few of the less common ones.

volts YaBB Newbies Offline Posts: 27 Canada	Re: "undo" noStroke() Reply #6 - Sep 10^th, 2008, 2:01pm Thanks Jo, StyleStack looks pretty thorough; I could see myself (ab)using it just to call PeekStyle(). I'll be reading your mouse sensitive shapes and zoom/pan code for inspiration as well.

ilazarte YaBB Newbies Offline Posts: 21	Re: "undo" noStroke() Reply #7 - Feb 11^th, 2009, 1:35am Thanks for Style Stack! I might give it a go to see how it works... I'm finding myself implementing a light scene graph in my latest processing project so i was looking around for something like pushMatrix/popMatrix. popStyle, popStyle!

PhiLho YaBB Moderator Offline Posts: 4190 Near Paris (France)	Re: "undo" noStroke() Reply #8 - Feb 11^th, 2009, 1:23pm ilazarte, I am not too sure on how to interpret your comment. But for reference for this thread, I will point that fry followed up his comment and introduced indeed pushStyle() and popStyle().

Cedric YaBB Moderator Offline Posts: 1838	Re: "undo" noStroke() Reply #9 - Feb 12^th, 2009, 2:33am great, that was new to me... maybe i should read whats new in version 1,0 and save alot of time. table with all new commands? couldnt find one?
	twitter.com/CedricKiefer

PhiLho YaBB Moderator Offline Posts: 4190 Near Paris (France)	Re: "undo" noStroke() Reply #10 - Feb 12^th, 2009, 11:21am Ah? Indeed, I couldn't find push/popStyle neither in the list of changes nor in the list of revisions linked from the download list. Perhaps a little involuntary omission?

volts YaBB Newbies Offline Posts: 27 Canada	Re: "undo" noStroke() Reply #11 - Feb 12^th, 2009, 1:33pm I'll just take this opportunity to thank Fry for push/popStyle(). They make it so much easier to have objects, each with their own .draw() method. -- Tom

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