Data driven properties on line-gradient colors
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- Dominant language
- TypeScript
- Stars
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Description
## Motivation
As far as I tested for know, it seems not possible to use data driven property to set the color associated with the percentages in the line-gradient / heatmap paint property.
For instance see this API example below :
```
map.addLayer({
type: 'line',
source: 'line',
id: 'line',
paint: {
'line-width': 14,
'line-gradient': [
'interpolate',
['linear'],
['line-progress'],
0, ["get", "src-color"],
1, "["get", "dst-color"]
]
},
});
```
Cheers,
Matthieu.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the API example in the issue and trace how line-gradient and heatmap paint properties handle expression-based colors. Done means data-driven properties can set the colors associated with gradient percentages, with behavior matching the example.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- typescript
- Domain
- data-visualization, frontend, web-dev
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100