webgl_geometry_colors_lookuptable.html revisted

[Temdog007]

Fixes #14634

[WestLangley]

Temporary live link:

https://raw.githack.com/Temdog007/three.js/example/lut/examples/webgl_geometry_colors_lookuptable.html

[WestLangley]

You can simplify the example if you want. In fact, I'd suggest it.

[Temdog007]

Changes

• Removed legend from example
• Removed model from example; Used THREE JS Geometries instead
• Set color mapping to UVs or Vertices

[WestLangley]

In certain applications, it is common to color-code a model based on an attribute. In this example, the attribute is pressure. In another example, it may be a terrain, and the attribute is elevation. (I think that would be of interest if you want to change the model.)

It is reasonable to show how to update the colors with a different color map.

It is reasonable to show a legend, but I have no opinion on whether you retain it or not.

There is no need to support changing the number of color levels. There is no need to remove and dispose of the object and rebuild it every time the color map is changed.

That is what I meant by 'simplify' the example. And, of course, it is just my opinion.

[Temdog007]

Changes

• Allow legend to change without creating a new one
• Removed numberOfColors parameter from GUI
• Allow color attribute to change without creating a new one

[Mugen87]

I get the following warning on my machine:

three.js:7603 THREE.WebGLAttributes: Unsupported data buffer format: Float64Array.

Besides, I don't see a legend on my computer. Is that intended?

[mrdoob]

Thanks!