Chart line rendering on FF is not smooth

[phet-steele]

The red line on the potential chart looks very choppy/pixelated on Firefox 34.0:

Here's Chrome's as a counter-example:

Viewed on 1.0.0-dev.7 with Win 8.1 64 bit

Troubleshooting information: Name: Neuron URL: http://www.colorado.edu/physics/phet/dev/html/neuron/1.0.0-dev.7/neuron_en.html Version: 1.0.0-dev.7 Features missing: touch User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0 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: 10 uniform: 254 Texture: size: 16384 imageUnits: 16 (vertex: 4, combined: 20) Max viewport: 16384x16384 OES_texture_float: true

[orejolaphet]

Also occurs in Win 8 IE 11

[jbphet]

Looks fine for me running on Win 7, Firefox 35.0.1. Screenshot:

Could be that the issue is fixed in v35, or that it only occurs on some machines. Here is the "Troubleshooting Information" that corresponds to this screenshot:

Troubleshooting information (do not edit): Name: Neuron URL: http://www.colorado.edu/physics/phet/dev/html/neuron/1.0.0-dev.8/neuron_en.html Version: 1.0.0-dev.8 Features missing: touch User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:35.0) Gecko/20100101 Firefox/35.0 Language: en-US Window: 1324x678 Pixel Ratio: 1/1 WebGL: WebGL 1.0 GLSL: WebGL GLSL ES 1.0 Vendor: Mozilla (Mozilla) Vertex: attribs: 16 varying: 10 uniform: 254 Texture: size: 8192 imageUnits: 16 (vertex: 4, combined: 20) Max viewport: 8192x8192 OES_texture_float: true

[jbphet]

Also looks fine for me in IE 11 on Win 7. Screenshot:

Troubleshooting information (do not edit): Name: Neuron URL: http://www.colorado.edu/physics/phet/dev/html/neuron/1.0.0-dev.8/neuron_en.html Version: 1.0.0-dev.8 Features missing: touch, fullscreen Flags: pointerEnabled, msPointerEnabled User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; InfoPath.3; .NET4.0E; MALC; rv:11.0) like Gecko Language: en-US Window: 1489x747 Pixel Ratio: 1/1 WebGL: WebGL 0.94 GLSL: WebGL GLSL ES 0.94 Vendor: Microsoft (Internet Explorer) Vertex: attribs: 16 varying: 15 uniform: 512 Texture: size: 8192 imageUnits: 16 (vertex: 16, combined: 32) Max viewport: 8192x8192 OES_texture_float: true

[jbphet]

Perhaps this is machine dependent, based on the graphics capability of the given computer. At any rate, it seems fairly low priority for now.

[jbphet]

Assigning to myself, since I'll need to determine whether or not to address this.

[jbphet]

I just tested the latest master version on my Win 7 machine, and the chart line looks fine on Firefox. Assigning back to @phet-steele to gather more details about where and when this occurs. If it is a small number of machines, we will likely close the issue without fixing it since it doesn't significantly affect usability.

[jbphet]

Note to @phet-steele - it is probably best to test this using the PhET testing devices so that if you are able to duplicate it I can check it out easily.

[phet-steele]

Here's what I have on FF 41.0.2, still not very smooth. I can check on a PhET device later:

[ariel-phet]

Looks completely acceptable to me now on Win 7 FF 43.0.2

Closing