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bjnortier / shapesmith.deprecated

Open source HTML5 3D modelling
http://www.shapesmith.net
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Preview geometry faces not shown inside transparent geometry #30

Open bjnortier opened 12 years ago

bjnortier commented 12 years ago

Screenshot

splace commented 12 years ago

this will be the same thing as "multiple transparent objects viewed through each other doesn't work" also effects lines, screen shot

splace commented 12 years ago

as far as i know this is unfixable,

(is possible in opengl but dont think the replacement of the fixed pipeline is possible in webgl)

splace commented 12 years ago

update:

this appears fixed by default in DX11 generation cards, (so will just work in webgl i think) the fix is referred to as a new feature called: "Order-independent transparency" because before, to work, transparent faces had to be presented already sorted in z somehow.

update update (sorry)

doing some more research, DX11 and OpenGL4.2 just do this, but need special implementations (although the card manufacturers propaganda makes it seem easy.) and then i think it has to be standardised/streamlined into OpenGL ES (and embedded system manufacturers might resent the extra complexity if nobody is crying out for it.), and then it might make it into WebGL, so now i think there's a long way to go before this 'just works' ;<

splace commented 12 years ago

this might be a way to get around this problem;

http://castle-engine.sourceforge.net/vrml_engine_doc/output/xsl/html-nochunks/vrml_engine.html#section.material_transparency_by_stipple