concaveman | A very fast 2D concave hull algorithm in JavaScript | 3D Animation library

by mapbox JavaScript Version: 1.2.1 License: ISC

X-Ray Key Features Code Snippets Community Discussions(5)Vulnerabilities Install Support

kandi X-RAY | concaveman Summary

concaveman is a JavaScript library typically used in User Interface, 3D Animation applications. concaveman has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can install using 'npm i concaveman' or download it from GitHub, npm.

A very fast 2D concave hull algorithm in JavaScript (generates a general outline of a point set).

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Quality

Security

License

Reuse

Support

concaveman has a low active ecosystem.

It has 481 star(s) with 64 fork(s). There are 84 watchers for this library.

It had no major release in the last 12 months.

There are 5 open issues and 8 have been closed. On average issues are closed in 4 days. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of concaveman is 1.2.1

Quality

concaveman has 0 bugs and 0 code smells.

Security

concaveman has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

concaveman code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

concaveman is licensed under the ISC License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

concaveman releases are available to install and integrate.

Deployable package is available in npm.

Installation instructions are not available. Examples and code snippets are available.

concaveman saves you 3 person hours of effort in developing the same functionality from scratch.

It has 11 lines of code, 0 functions and 5 files.

It has low code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi has reviewed concaveman and discovered the below as its top functions. This is intended to give you an instant insight into concaveman implemented functionality, and help decide if they suit your requirements.

Generate a new segment
Calculates the segment distance to the segment .
Find candidate candidates for a node
square distance function
speed up convex hull by 1 points
Insert a node into a new node
Computes a convex hull of a polygon
Checks whether a segment is intersecting .
square distance from a bounding box
Set the bounding box of a node .

Get all kandi verified functions for this library.

concaveman Key Features

No Key Features are available at this moment for concaveman.

concaveman Examples and Code Snippets

No Code Snippets are available at this moment for concaveman.

Community Discussions

Trending Discussions on concaveman

finding points with polygon in sf package

Alternative for R package concaveman to create polygons

Create voronoi cells within each polygon seperately

Combining a feature collection of MULTILINESTRINGs into one closed polygon in R

Get multiple polygons for scattered data in R

QUESTION

finding points with polygon in sf package

Asked 2021-May-27 at 15:10

I'm trying to create a simple polygon in sf and select only points within that polygon. What am I doing wrong here?

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ANSWER

Answered 2021-May-27 at 15:10

I think you are looking for st_filter. This way you'll get only the points that are found within the polygon. The good points object now contains only two points, instead of three (like in the OP).

Source https://stackoverflow.com/questions/67724714

QUESTION

Alternative for R package concaveman to create polygons

Asked 2020-Nov-09 at 02:21

I have a script using the R package 'concaveman', but due to issues on the ubuntu platform that I need to run the code on I cannot install this package (it has taken me three days trying to solve it). So I am looking for an alternative.

I have a random set of points ranging from 3 to 1000s of points. I want to draw a convex hull/polygon around the outer most points (step after would be to rasterize). I have been trying to do it by converting the points to a raster, then use rastertopolygons, but in rare occasions points would be in the same raster cell resulting in only two unique points. Convaveman would make this into a linear polygon (which is what I want, without using concaveman). Here is the input data that would be problematic:

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ANSWER

Answered 2020-Nov-08 at 14:45

You can use chull in base R:

Source https://stackoverflow.com/questions/64737754

QUESTION

Create voronoi cells within each polygon seperately

Asked 2020-Nov-08 at 20:28

Data: In the data below I have clusters, which are 2 large groupings of the data. Within each cluster are 5 districts. I use the points within each cluster to create a polygon for the cluster.

Problem: I'm attempting to calculate voronoi for each district within each cluster. So each of the 2 cluster polygons should have 5 voronoi cells within it. How can I create 5 voronoi cells bounded by each cluster polygon?

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ANSWER

Answered 2020-Nov-08 at 20:28

To get separate voronoi polygons for each "cluster", you can run a for loop. Instead of the expression v <- st_voronoi(st_union(sf_district), sfbox), as follows:

Source https://stackoverflow.com/questions/64557210

QUESTION

Combining a feature collection of MULTILINESTRINGs into one closed polygon in R

Asked 2020-Nov-02 at 12:20

edit: This question has now been correctly answered here: https://gis.stackexchange.com/a/378085/171458

I have a shapefile consisting of 262 rows of MULTILINESTRINGs. Combined this shapefile (the political boundary of the arctic region) wraps the world and I would like to check for a large set of coordinates if they fall within this shapefile. I know how to do that, but that does require having a closed polygon, instead of a combination of lines. Some of my solutions have come pretty far, but none actually work.

I have looked at this: https://gis.stackexchange.com/questions/290170/convert-a-linestring-into-a-closed-polygon-when-the-points-are-not-in-order and this page: https://gis.stackexchange.com/questions/332427/converting-points-to-polygons-by-group

The shapefile can be downloaded here: https://www.amap.no/work-area/document/868

I have also posted it here: https://gis.stackexchange.com/questions/378010/combining-a-feature-collection-of-multilinestrings-into-one-closed-polygon-in-r, but I am also asking it here because I only have R available for this task.

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ANSWER

Answered 2020-Nov-02 at 12:20

This question has now been correctly answered here: https://gis.stackexchange.com/a/378085/171458, please see that post for an excellent solution and explanation (NOT BY ME).

Source https://stackoverflow.com/questions/64612454

QUESTION

Get multiple polygons for scattered data in R

Asked 2020-Jun-15 at 09:01

I have point cloud data of an area (x,y,z coordinates) The plot of X and Y looks like:

I am trying to get polygons of different clusters in this data. I tried the following:

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ANSWER

Answered 2020-Jun-15 at 09:01

It's hard to tell from your example what variable defines your clusters. Below is an example with some simulated clusters using ggplot2 and data.table (adapted from here).

Source https://stackoverflow.com/questions/62381506

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install concaveman

You can install using 'npm i concaveman' or download it from GitHub, npm.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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