Thanks a lot Maurice, appreciate the help. I see what you mean, and although it could work all right, it would mean a lot of manual calculations. Doable, but I was hoping for something using blendmodes. The extra challenge I may not have mentioned before, is that it's not just 1 image that is placed, but theoretically unlimited. So that would mean creating the rects for each image separately. Doable though, so I'm keeping it in mind. Thanks!
Ben On 31 aug. 2013, at 17:52, Maurice Amsellem <[email protected]> wrote: > Hi Ben, > Back from vacation, I couldn't resist trying "for real" the tips I sent you. > > So here is a sample tested app that does what you need, in pure mxml: > The file "Koala.jpg" is a sample 200x200 jpeg. > The image is not draggable of course, but it's correctly masked (0.3 red > colorized) outside of the central white area. > Try it and let me know. > > <?xml version="1.0"?> > <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"; > xmlns:s="library://ns.adobe.com/flex/spark" > backgroundColor="gray" > > > <s:Rect id="areaRect" left="100" top="100" right="100" bottom="100"> > <s:fill> > <s:SolidColor color="white" alpha="1"/> > </s:fill> > </s:Rect> > > <s:Group id="offMaskGrp" left="0" top="0" bottom="0" right="0"> > <s:Rect id="leftStrip" left="0" top="0" bottom="0" width="100"> > <s:fill> > <s:SolidColor alpha="0"/> > </s:fill> > </s:Rect> > <s:Rect id="topStrip" left="100" top="0" right="100" height="100"> > <s:fill> > <s:SolidColor alpha="0"/> > </s:fill> > </s:Rect> > <s:Rect id="rightStrip" top="0" bottom="0" right="0" width="100"> > <s:fill> > <s:SolidColor alpha="0"/> > </s:fill> > </s:Rect> > <s:Rect id="bottomStrip" left="100" bottom="0" right="100" > height="100"> > <s:fill> > <s:SolidColor alpha="0"/> > </s:fill> > </s:Rect> > </s:Group> > > <s:Group id="draggable" left="50" top="50"> > <s:BitmapImage source="@Embed('/embedded/Koala.jpg')" /> > <s:Rect id="offRect" left="0" top="0" right="0" bottom="0" > mask="{offMaskGrp}"> > <s:fill> > <s:SolidColor color="red" alpha="0.3"/> > </s:fill> > </s:Rect> > </s:Group> > > </s:Application> > > Regards, > > Maurice > > -----Message d'origine----- > De : Ben Smeets [mailto:[email protected]] > Envoyé : mardi 27 août 2013 09:30 > À : [email protected] > Objet : Re: Limit Blendmode to 1 layer > > Tnx Maurice, > > Will try to come up with something working using your tips. If I do, I'll let > you know. > > @Alex: I tried the Pbj shader as well, but it completely kills performance :( > (as in, macbook lifting off into space with it's fan). > > Ben > > On 27 aug. 2013, at 09:15, Maurice Amsellem <[email protected]> > wrote: > >> >> Option 1) is not such complex math. You can use globalTolLocal and >> localToGlobal to help for conversions. >> >> Option2) you can get both red and alpha, because the hole only acts as a >> mask, and it´s the overlay rect that has the red fill with alpha. >> I am in vacation, without my pc, so i can't send you any code that i have >> tested until next week... >> >> Regards >> >> Maurice >> >> ________________________________________ >> De : Ben Smeets [[email protected]] >> Envoyé : lundi 26 août 2013 23:08 >> À : [email protected] >> Objet : Re: Limit Blendmode to 1 layer >> >> Tnx Maurice, >> >> Option 1 is something I thought about. Doable, but complex math. It's what >> triggered me to find help for a different approach though. >> >> Option 2 is the road I'm at now. I have the hole. The challenge is, that I >> would like the parts outside the "shape layer" to be red instead of alpha. >> So masking (not sure) is not something that'll work. That's how I got to the >> blendmodes. E.g. making the layer on top (with the hole inside) red and >> blended. The only thing I'm still left with, is that that top layer will >> also colorize everything below the image (the thing I only need to be >> colorized). >> >> Either way what we come up with, It already helpes knowing that my >> current approach is not entirely crazy, tnx :) >> >> Ben >> >> On 26 aug. 2013, at 22:03, Maurice Amsellem <[email protected]> >> wrote: >> >>> Ok, i think i understood: the part of the dragged image that gets off the >>> square dragging area needs to be colorized. >>> >>> Assuming my understanding is correct, I would do it either of two ways: >>> >>> 1) programmatic >>> >>> While the image is dragged around, determine the area that is off >>> bounds and draw a semi-transparent rectangle ( in updateDisplayList) >>> in. That area >>> >>> 2) mxml >>> Add an overlay rect the size and position of the dragged image, with >>> alpha fill ( put them in the same s:group) Create an area that corresponds >>> to the off-bounds area, ie the background rectangle with a hole >>> corresponding to the square white rectangle, and use it as a mask ( mask >>> property) to the overlay rectangle. That way , the overlay rectangle will >>> be drawn only where the mask is ON. >>> However, perfromance may be impacted when using large masks, so i >>> definitely prefer the programmatic way. >>> >>> Hope this helps >>> >>> Maurice >>> >>> >>> ________________________________________ >>> De : Ben Smeets [[email protected]] >>> Envoyé : lundi 26 août 2013 20:30 >>> À : [email protected] >>> Objet : Re: Limit Blendmode to 1 layer >>> >>> Sure, I'll try to explain it :) This is what I currently have: >>> >>> - Top layer (blendMode=x) >>> - Draggable object layer (image) >>> - Shape layer (square white rectangle) >>> - Background layer (plain gray) >>> >>> The Top layer is draggable. The goal is to make every part of Draggable >>> layer which is dragged outside of the shape layer below it, colorized (or >>> something visual, while retaining a bit of the visual aspect, which is why >>> I got to overlaying a blended layer.). Most issues have been tackled. Only >>> thing left now is that by applying a blendMode, the gray background get's >>> part of that blend effect (color) as well. So I through the trick would be >>> to limit the blendmode to only the Dragable Object Layer. >>> >>> Don't mean to spam the list, if this is not exactly Flex related. Any tips >>> appreciated. >>> >>> Ben >>> >>> On 26 aug. 2013, at 19:29, Maurice Amsellem <[email protected]> >>> wrote: >>> >>>> For me, colorTrasform applies to the whole layer, no masking is possible. >>>> Maybe if you can describe in more detail what you are trying to do, >>>> someeone can help... >>>> >>>> Maurice >>>> ________________________________________ >>>> De : Ben Smeets [[email protected]] >>>> Envoyé : lundi 26 août 2013 19:23 >>>> À : [email protected] >>>> Objet : Re: Limit Blendmode to 1 layer >>>> >>>> Didn't think of that one, nice. Extra challenge though, is that i can't >>>> transform the entire layer. Just the part that the top layer is over (or >>>> is that possible with colortransform as well)? >>>> >>>> Op 26 aug. 2013 om 17:35 heeft Maurice Amsellem >>>> <[email protected]> het volgende geschreven: >>>> >>>>> If the purpose of the blending layer is to apply an coloring / lighting >>>>> effect to the layer below, they applying a color transform to the layer >>>>> below instead (colorTransform property) could be what you need. >>>>> >>>>> Maurice >>>>> ________________________________________ >>>>> De : Ben Smeets [[email protected]] >>>>> Envoyé : lundi 26 août 2013 15:58 >>>>> À : [email protected] >>>>> Objet : Limit Blendmode to 1 layer >>>>> >>>>> Hi, >>>>> >>>>> Anybody know if it is possible to limit the effect of a Blended layer to >>>>> only the layer below it (e.g.). My app has a dark background, the top >>>>> layer which is blending is now blending over all layers, including the >>>>> background. I am trying to let it blend over 1 specific layer below it >>>>> without affecting anything else. >>>>> >>>>> Tnx, Ben >>>>> >>>> >>> >>> >> >> > >
