Comments (5)
I have just added a few blocks to demonstrate what I'm trying to achieve:
Compute a voronoi spanning tree
Compute a better spanning tree
from d3-voronoi.
Neat!
from d3-voronoi.
Another application: Voronoi binning
from d3-voronoi.
I found a small bug in your optimization. Instead of this:
next = diagram.find.found || Math.floor(Math.random() * diagram.cells.length);
You want to say this:
next = diagram.find.found == null ? Math.floor(Math.random() * diagram.cells.length) : diagram.find.found;
Because sometimes the last-found index can be zero, and you want to treat that differently from it being undefined. Example here: http://bl.ocks.org/mbostock/76d0346147b55a08b91dcccf8da58291
Also, I think diagram._found would be a better place to stash the last-found index than putting it on the diagram.find method, especially since if this is implemented on Diagram.prototype the find function would be shared by all diagram instances.
Do you want to open a pull request to add this feature? Or do you want me to implement your suggested algorithm and add tests?
from d3-voronoi.
sometimes the last-found index can be zero, and you want to treat that
differently from it being undefined. Example here:
http://bl.ocks.org/mbostock/76d0346147b55a08b91dcccf8da58291
Math.random()
is useless here — I put it because I tend to like it better
when things are evenly distributed, and to highlight that any starting
point will work. The only thing is to start with an existing site. On this
issue, I wonder if at some point the site with index 0 might disappear, for
example when we find a way to constructively add and remove sites from the
Diagram. Then we'll need to pop one site from the list.
In the meantime, I think diagram.find.found || 0
is more than enough.
Also, I think diagram._found would be a better place to stash the
last-found index than putting it on the diagram.find method, especially
since if this is implemented on Diagram.prototype
https://github.com/d3/d3-voronoi/blob/master/src/Diagram.js the find
function would be shared by all diagram instances.right
Do you want to open a pull request to add this feature? Or do you want me
to implement your suggested algorithm and add tests?Will start a PR.
-- Fil
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Related Issues (20)
- New examples for 1.0.1 HOT 4
- Crash in voronoi.triangles? HOT 4
- Handle collinear (and cocircular) points? HOT 5
- Suggestion: small optimization by returning the tangent instead of the angle HOT 1
- Cannot read property '0' of null in clipCells() HOT 13
- polygons() returning [null, null, null] HOT 4
- .find() throws exception when data contains two elements on the same same position
- Missing Triangle? HOT 2
- Inverse Voronoi? HOT 1
- TypeError: Cannot read property 'circle' of null HOT 6
- Feature request; polygon extent HOT 2
- d3.voronoi mutates data HOT 3
- voronoi.findAll(x,y,r) HOT 2
- voronoi.polygons crashes (runs out of memory) HOT 2
- Relation with d3-delaunay HOT 1
- Cell.js:75 Uncaught TypeError: Cannot read property '0' of null HOT 2
- voronoi.polygons will run out of memory or return incorrect polygons for certain data sets. HOT 1
- clipCells causes 'cannot read property 0 of null' HOT 6
- Incremental Voronoi?
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