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Add opacity to aesthetic channels. #41
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I second this, this would be really nice! |
Just want to spec this out a bit. There's a lot of ways it could go: @bmschmidt is this what you had in mind, supporting both options a & b? {
encoding: {
opacity: {
// Option a: just map the domain of a field to opacity [0, 1]
field: "percentage_of_some_thing",
domain: [0, 100],
// Option b: a lambda that returns the opacity value
lambda: some_field => some_field !== "jazz" ? 0.3 : 1,
},
},
} |
Looks like I'll dive into this by creating a rough "clone" of the Size aesthetic (similar API), and then from there we can tweak the API & options to get it just right! |
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Currently opacity can only be set globally for all points, but there are cases where you want to have a subset of points at full opacity, e.g. #35. This is pretty straightforward to implement.
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