Slight artifacts on escaping and spinning NO2 and O3 molecules

[phet-steele]

While testing 1.1.0-rc.1 in FF 40 (Win 8.1), I saw ever so slight artifacts being left behind after movement of NO2 and O3 molecules.

Name: ‪Molecules and Light‬
URL: http://www.colorado.edu/physics/phet/dev/html/molecules-and-light/1.1.0-rc.1/molecules-and-light_en.html
Version: 1.1.0-rc.1 2015-08-11 18:49:22 UTC
Features missing: touch
User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0
Language: en-US
Window: 1366x633
Pixel Ratio: 1/1
WebGL: WebGL 1.0
GLSL: WebGL GLSL ES 1.0
Vendor: Mozilla (Mozilla)
Vertex: attribs: 16 varying: 28 uniform: 1024
Texture: size: 16384 imageUnits: 16 (vertex: 16, combined: 32)
Max viewport: 32767x32767
OES_texture_float: true
Dependencies JSON: {"assert":{"sha":"858e65ac","branch":"master"},"axon":{"sha":"1f0ca9f4","branch":"master"},"babel":{"sha":"2431e711","branch":"master"},"brand":{"sha":"aa39bc48","branch":"master"},"chipper":{"sha":"6cb12b9c","branch":"master"},"dot":{"sha":"e34c6b2c","branch":"master"},"joist":{"sha":"77298536","branch":"master"},"kite":{"sha":"24978146","branch":"master"},"molecules-and-light":{"sha":"05c075b5","branch":"1.1"},"nitroglycerin":{"sha":"c6f79ce4","branch":"master"},"phet-core":{"sha":"8e31808c","branch":"master"},"phetcommon":{"sha":"89a44d2c","branch":"master"},"scenery":{"sha":"e23c0f08","branch":"master"},"scenery-phet":{"sha":"bec2cc7f","branch":"master"},"sherpa":{"sha":"4f160877","branch":"master"},"sun":{"sha":"66c091cc","branch":"master"}}

[jessegreenberg]

Unable to reproduce on Windows 7 FF 40.0.2, but to be honest I can't really see any artifacts in the image above.

[jessegreenberg]

Ah, when I blow up the image, I can see very small green dots in between the two ultraviolet photons, @phet-steele is this what you are referring to?

[phet-steele]

Yea, they travel all the way up the screen, too. They are small, sure, but pretty obvious on my screen.

[phet-steele]

l'll update FF and see what happens.

[phet-steele]

Still there.

[ariel-phet]

@jessegreenberg you can mark this as will not fix for the moment, but leave this as an open issue.

[jbphet]

@jonathanolson - I thought you might want to take a quick look at this and see if it is anything to be concerned about in Scenery. If there is nothing obvious, please assign back to me.

[jbphet]

Not needed for the upcoming release.

[jonathanolson]

Looks like a Firefox-specific SVG rendering bug.

A potential fix would be to have at least 1px of transparency along the borders of the image (it looks like the semi-transparent content goes all the way to the edge of the image). Don't have a good idea of how likely this would be to fix it.

[jessegreenberg]

I was just able to reproduce this. It is so hard to see I think I missed it the first time

Leaving as open issue, but not to be fixed for this release.

[jbphet]

Since we're not going to try to address it for the next release, I will unassign the issue until we decide to close or address it.