CARTO: HeatmapTileLayer full colorRange

[felixpalmer]

Followup to #8703

Background

Previous version only supported 6 colors in color map via explicit unifroms. With this change a colorTexture is used instead, like in the HeatmapLayer to provide an unlimited number of colors

Change List

• Generate colorTexture from passed colorRange in Layer
• Replace colorRange with colorTexture in shader module

[coveralls]

coverage: 89.229% (-0.05%) from 89.274%
when pulling ac01efe on felix/heatmap-lut-poc
into 27c6702 on master.

[ibgreen]

Very cool!

Since the very beginning of deck.gl I always wanted to create some reusable code for managing colormaps in textures that could be used across all layers.

Not quite sure if a shader module or an extension.

Since you have a working implementation here, you might see opportunities in this regard. Even starting with a partial breakdown (perhaps a shader module local to the layer) could reduce the effort to take the next step.

[felixpalmer]

reusable code for managing colormaps

Yes, that would indeed be nice and I think it would be possible via a ShaderModule. Note that this code is not new, I've lifted it from the existing HeatmapLayer. The long-term goal is to base the standard HeatmapLayer on the approach taken with HeatmapTileLayer as the performance is much better.