geom2d | Objects and Algorithms for 2D Geometry in Ruby | 3D Animation library

 by   gettalong Ruby Version: Current License: Non-SPDX

kandi X-RAY | geom2d Summary

kandi X-RAY | geom2d Summary

geom2d is a Ruby library typically used in Institutions, Learning, Education, User Interface, 3D Animation applications. geom2d has no bugs, it has no vulnerabilities and it has low support. However geom2d has a Non-SPDX License. You can download it from GitHub.

This library implements objects for 2D geometry, like points, lines, line segments, arcs, curves and so on, as well as algorithms for these objects, like line-line intersections and arc approximation by Bézier curves.
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            kandi-support Support

              geom2d has a low active ecosystem.
              It has 7 star(s) with 3 fork(s). There are 2 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 0 open issues and 1 have been closed. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of geom2d is current.

            kandi-Quality Quality

              geom2d has 0 bugs and 0 code smells.

            kandi-Security Security

              geom2d has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              geom2d code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              geom2d has a Non-SPDX License.
              Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

            kandi-Reuse Reuse

              geom2d releases are not available. You will need to build from source code and install.
              Installation instructions are not available. Examples and code snippets are available.
              It has 1478 lines of code, 97 functions and 20 files.
              It has high code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed geom2d and discovered the below as its top functions. This is intended to give you an instant insight into geom2d implemented functionality, and help decide if they suit your requirements.
            • Calculate a segment for the given segment .
            • Add two bounds to this point
            • Multiply Geometry
            • Multiply a Point .
            • Returns a new Point
            • Adds a point to this segment .
            • Returns the bounds of the given point .
            • Yield each segment
            • Determine whether the diagonal is a square
            • Returns an array of all the boxes associated with this polygon .
            Get all kandi verified functions for this library.

            geom2d Key Features

            No Key Features are available at this moment for geom2d.

            geom2d Examples and Code Snippets

            No Code Snippets are available at this moment for geom2d.

            Community Discussions

            QUESTION

            Convert polyshape to set of coordinates array
            Asked 2020-Jul-14 at 16:55

            I wish to find the shortest distance between a point and a polyshape using the distancepointpolygon function from Matlab geom2d library. The distancepointpolygon function does it for polygon and therefore how can I convert any polyshape to a N-by-2 array containing vertex coordinates? I did it manually and I am looking for a general solution.

            ...

            ANSWER

            Answered 2020-Jul-14 at 16:55

            polySquare.Vertices should be the matrix you need:

            Source https://stackoverflow.com/questions/62899638

            QUESTION

            Oriented Bounding Box algorithm, Need some understanding/clarification of a few lines of existing (working) code
            Asked 2020-Apr-09 at 16:45

            I am reviewing some MATLAB code that is publicly available at the following location: https://github.com/mattools/matGeom/blob/master/matGeom/geom2d/orientedBox.m

            This is an implementation of the rotating calipers algorithm on the convex hull of a set of points in order to compute an oriented bounding box. My review was to understand intuitively how the algorithm works however I seek clarification on certain lines within the file which I am confused on.

            On line 44: hull = bsxfun(@minus, hull, center);. This appears to translate all the points within the convex hull set so the calculated centroid is at (0,0). Is there any particular reason why this is performed? My only guess would be that it allows straightforward rotational transforms later on in the code, as rotating about the real origin would cause significant problems.

            On line 71 and 74: indA2 = mod(indA, nV) + 1; , indB2 = mod(indB, nV) + 1;. Is this a trick in order to prevent the access index going out of bounds? My guess is to prevent out of bounds access, it will roll the index over upon reaching the end.

            On line 125: y2 = - x * sit + y * cot;. This is the correct transformation as the code behaves properly, but I am not sure why this is actually used and different from the other rotational transforms done later and also prior (with the calls to rotateVector). My best guess is that I am simply not visualizing what rotation needs to be done in my head correctly.

            Side note: The external function calls vectorAngle, rotateVector, createLine, and distancePointLine can all be found under the same repository, in files named after the function name (as per MATLAB standard). They are relatively uninteresting and do what you would expect aside from the fact that there is normalization of vector angles going on.

            ...

            ANSWER

            Answered 2020-Mar-03 at 12:54

            I did not really look at the code, this is an explanation of how the rotating calipers work.

            A fundamental property is that the tightest bounding box is such that one of its sides overlaps an edge of the hull. So what you do is essentially

            • try every edge in turn;

            • for a given edge, seen as being horizontal, south, find the farthest vertices north, west and east;

            • evaluate the area or the perimeter of the rectangle that they define;

            • remember the best area.

            It is important to note that when you switch from an edge to the next, the N/W/E vertices can only move forward, and are readily found by finding the next decrease of the relevant coordinate. This is how the total processing time is linear in the number of edges (the search for the initial N/E/W vertices takes 3(N-3) comparisons, then the updates take 3(N-1)+Nn+Nw+Ne comparisons, where Nn, Nw, Ne are the number of moves from a vertex to the next; obviously Nn+Nw+Ne = 3N in total).

            The modulos are there to implement the cyclic indexing of the edges and vertices.

            Source https://stackoverflow.com/questions/60497452

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

            Vulnerabilities

            No vulnerabilities reported

            Install geom2d

            You can download it from GitHub.
            On a UNIX-like operating system, using your system’s package manager is easiest. However, the packaged Ruby version may not be the newest one. There is also an installer for Windows. Managers help you to switch between multiple Ruby versions on your system. Installers can be used to install a specific or multiple Ruby versions. Please refer ruby-lang.org for more information.

            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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            gh repo clone gettalong/geom2d

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            git@github.com:gettalong/geom2d.git

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