Increase size of pendulums and vectors in navbar icons

[arouinfar]

@ariel-phet pointed out that the navbar icons for the Intro and Lab screens are a little hard to interpret.

Self-assigning this issue to update the artwork for the icons. The size of the pendulums and vectors should be exaggerated a bit.

[arouinfar]

I've exaggerated the Intro and Lab screen navbar icons (bottom)

The modified icons look a bit more recognizable in context

Here are the updated image files. These should be used in the navbar only -- no need to change the home screen icons. lab_navbar_icon.png intro_navbar_icon.png

Assigning to @veillette for implementation. Please let me know if you need an .ai file for this.

[veillette]

Thanks @arouinfar, the two navbar icons have been added. I updated the license file for the images and added you to the credits.

The sim builds with brand=phet without complaint.

Closing

[veillette]

We are hitting an assertion. The intro-navbar-icon does not have a correct aspect ratio. It size is 1133/778= 1.45629820051

        var validAspectRatio = Math.abs( iconAspectRatio - navbarIconAspectRatio ) < tolerance || Math.abs( iconAspectRatio - homeScreenIconAspectRatio ) < tolerance;
        assert && assert( validAspectRatio, 'NavigationBar icons for screen ' + screenIndex + ' did not have a valid aspect ratio.' );

The tolerance is 0.001

FYI, the icon must be a minimum of 147x100 and have an aspect ratio of 548/373=1.469. See https://github.com/phetsims/joist/issues/76

[veillette]

And there is a similar problem with the intro-navbar-icon :(

[veillette]

Assigning to @arouinfar to reissue new icons,

[arouinfar]

Let's try these @veillette. I resized them to 441x300.

intro_navbar_icon.png lab_navbar_icon.png

[veillette]

Thanks @arouinfar , the new icons do not trigger assertions, and the branded sim builds without errors as well. Closing.

[arouinfar]

Master looks good! Thanks @veillette.