visibility-polygon-js | visibility polygon for a set of line segments | Computer Vision library

by byronknoll JavaScript Version: v1.9 License: No License

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kandi X-RAY | visibility-polygon-js Summary

visibility-polygon-js is a JavaScript library typically used in Artificial Intelligence, Computer Vision applications. visibility-polygon-js has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

This library can be used to construct a visibility polygon for a set of line segments.

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visibility-polygon-js has a low active ecosystem.

It has 108 star(s) with 13 fork(s). There are 10 watchers for this library.

It had no major release in the last 12 months.

There are 1 open issues and 5 have been closed. On average issues are closed in 46 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of visibility-polygon-js is v1.9

Quality

visibility-polygon-js has 0 bugs and 0 code smells.

Security

visibility-polygon-js has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

visibility-polygon-js code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

visibility-polygon-js does not have a standard license declared.

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Without a license, all rights are reserved, and you cannot use the library in your applications.

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visibility-polygon-js releases are available to install and integrate.

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visibility-polygon-js Key Features

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visibility-polygon-js Examples and Code Snippets

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Community Discussions

Trending Discussions on visibility-polygon-js

Convert polygon to inverted polygon, i.e. carve out the negative polygon from viewport rectangle

QUESTION

Convert polygon to inverted polygon, i.e. carve out the negative polygon from viewport rectangle

Asked 2020-Aug-17 at 20:35

I'm using this Line of sight library which works similar to the demo. When you move the player character around it constructs a polygon for the visible area, see the yellow polygon in the screenshot below.

However, I would like to get the inverted polygon or the "negative" polygon, so the blue area in the example screenshot. The inverted polygon can be used to block any sprites and elements by filling it with solid black color.

The yellow visibility polygon is an array of x,y positions, for example like this:

...

ANSWER

Answered 2020-Aug-17 at 20:35

What you call the negative polygon is essentially the original polygon from which you remove the edges on the square outline, which results in one or more open polylines, and to which you add closing segments drawn on the square outline, in the reversed traversal order.

In your second case, drop the edges 6-7-8-9, then close 9-10-11-12-13 with 13-X-9, close 14-15-16-4 with 1-14 and close 2-3-4-5-6 with 6-Y-2 (X and Y are corners).

This is a matter of rearranging the chains of vertices.

Source https://stackoverflow.com/questions/63438157

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

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You can download it from GitHub.

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