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phetsims / graphing-quadratics

"Graphing Quadratics" is an educational simulation in HTML5, by PhET Interactive Simulations.
MIT License
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Equation for y=ax^2 lies behind curves causing view to sometimes be obstructed #157

Closed Nancy-Salpepi closed 3 years ago

Nancy-Salpepi commented 3 years ago

Test device MacBook Air (m1 chip)

Operating System 11.4

Browser chrome 92.0.4515.131

Problem description https://github.com/phetsims/qa/issues/692

In the explore screen, the equations lie in front of the curves/lines except for y=ax^2. In some instances, the equations is blocked and unreadable.

Steps to reproduce Here is one instance:

  1. In the Explore screen, check all options under "Quadratic Terms."
  2. Check "Equations"
  3. Set "a" to .42 , set "b" to .9, and set "c" to 1.3 using the sliders.

Visuals Equation is behind curve:

Screen Shot 2021-08-17 at 10 47 58 AM

Equations are in front:

Screen Shot 2021-08-17 at 10 36 32 AM Screen Shot 2021-08-17 at 10 36 14 AM

Troubleshooting information: !!!!! DO NOT EDIT !!!!! Name: ‪Graphing Quadratics‬ URL: https://phet-dev.colorado.edu/html/graphing-quadratics/1.2.0-rc.1/phet/graphing-quadratics_all_phet.html Version: 1.2.0-rc.1 2021-08-09 23:17:20 UTC Features missing: applicationcache, applicationcache, touch Flags: pixelRatioScaling User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.36 Language: en-US Window: 1452x659 Pixel Ratio: 2/1 WebGL: WebGL 1.0 (OpenGL ES 2.0 Chromium) GLSL: WebGL GLSL ES 1.0 (OpenGL ES GLSL ES 1.0 Chromium) Vendor: WebKit (WebKit WebGL) Vertex: attribs: 16 varying: 31 uniform: 1024 Texture: size: 16384 imageUnits: 16 (vertex: 16, combined: 80) Max viewport: 16384x16384 OES_texture_float: true Dependencies JSON: {}

amanda-phet commented 3 years ago

I think the equation and curve for the main (red) curve are always in the front, since those are the most important. I just checked, and y=ax^2 seemed consistent with the other terms (y=bx and y=c) in that their equations are behind the red curve. We had to accept that in some cases, equations might be occluded, such as in this case: image

Since I am not seeing an inconsistency with how equations are treated, I'll close this issue. However if I'm misunderstanding, or there is more to discuss, please re-open.