geometry | Boost.Geometry - Generic Geometry Library | Requires C++14 | Dataset library

by boostorg C++ Version: boost-1.82.0 License: BSL-1.0

X-Ray Key Features Code Snippets(1)Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | geometry Summary

geometry is a C++ library typically used in Artificial Intelligence, Dataset applications. geometry has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Boost.Geometry, part of collection of the Boost C++ Libraries, defines concepts, primitives and algorithms for solving geometry problems. Boost.Geometry is a C++14 header-only library.

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Quality

Security

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Support

geometry has a low active ecosystem.

It has 385 star(s) with 208 fork(s). There are 36 watchers for this library.

It had no major release in the last 6 months.

There are 101 open issues and 241 have been closed. On average issues are closed in 257 days. There are 9 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of geometry is boost-1.82.0

Quality

geometry has 0 bugs and 0 code smells.

Security

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

geometry code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

geometry is licensed under the BSL-1.0 License. This license is Permissive.

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

Reuse

geometry releases are not available. You will need to build from source code and install.

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geometry Key Features

No Key Features are available at this moment for geometry.

geometry Examples and Code Snippets

Returns a string representation of the geometry .

java

Lines of Code : 4

License : Permissive (MIT License)

Copy

@Override
    public String toString() {
        return "Dest2 [id=" + id + ", points=" + points + "]";
    }

Community Discussions

Trending Discussions on geometry

android:exported added but still getting error Apps targeting Android 12 and higher are required to specify an explicit value for android:exported

Rearranging polygons in geopandas for matplotlib plotting

Count nodes within k distance of marked nodes in grid

Fastest way to clear group with a lot of shapes / multithreading

Delegate mouse events to all children in a JavaFX StackPane

ggplot2: Projecting points or distribution on a non-orthogonal (eg, -45 degree) axis

Get the "map" object in Mapbox-GL react native

Problem resizing plot on tkinter figure canvas

how to find the nearest LINESTRING to a POINT?

Efficient code for custom color formatting in tkinter python

QUESTION

android:exported added but still getting error Apps targeting Android 12 and higher are required to specify an explicit value for android:exported

Asked 2022-Mar-24 at 15:30

I have added android:exported="true" to my only activity in manifest but still getting below error after updating compile sdk and target sdk version to 31.I also tried rebuilding the project , invalidating cache and restart but that didn't helped

Error- Apps targeting Android 12 and higher are required to specify an explicit value for android:exported when the corresponding component has an intent filter defined. See https://developer.android.com/guide/topics/manifest/activity-element#exported for details.

AndroidManifest File ...

ANSWER

Answered 2021-Oct-05 at 10:38

After the build has failed go to AndroidManifest.xml and in the bottom click merged manifest see which activities which have intent-filter but don't have exported=true attribute. Or you can just get the activities which are giving error.

Add these activities to your App manifest with android:exported="true" and app tools:node="merge" this will add exported attribute to the activities giving error.

Example:

Source https://stackoverflow.com/questions/69287478

QUESTION

Rearranging polygons in geopandas for matplotlib plotting

Asked 2022-Mar-08 at 20:20

I am working on a project where I am using a shape file to make a choropleth map of the United States. To do this, I downloaded the standard shape file here from the US Census Bureau. After a little bit of cleaning up (there were some extraneous island territories which I removed by changing the plot's axis limits), I was able to get the contiguous states to fit neatly within the bounds of the matplotlib figure. For reference, please see Edit 4 below.

Edit 1: I am using the cb_2018_us_state_500k.zip [3.2 MB] shape file.

The only problem now is that by setting axis limits I now am no longer able to view Alaska and Hawaii (as these are obviously cut out by restricting the axis limits). I would now like to add both of these polygons back in my map but now towards the lower part of the plot figure (the treatment that is given by most other maps of this type) despite its geographical inaccuracy.

To put this more concretely, I am interested in selecting the polygon shapes representing Alaska and Hawaii and moving them to the lower left hand side of my figure. Is this something that would be possible?

I can create a Boolean mask using:

...

ANSWER

Answered 2021-Sep-22 at 17:25

You could do something like this. You will have to find the right offsets to position Alaska where you want it to be exactly.

Now, you have the following dataframe:

Source https://stackoverflow.com/questions/69278742

QUESTION

Count nodes within k distance of marked nodes in grid

Asked 2022-Feb-25 at 09:45

I am attempting to solve a coding challenge however my solution is not very performant, I'm looking for advice or suggestions on how I can improve my algorithm.

The puzzle is as follows:

You are given a grid of cells that represents an orchard, each cell can be either an empty spot (0) or a fruit tree (1). A farmer wishes to know how many empty spots there are within the orchard that are within k distance from all fruit trees.

Distance is counted using taxicab geometry, for example:

...

ANSWER

Answered 2021-Sep-07 at 01:11

This wouldn't be easy to implement but could be sublinear for many cases, and at most linear. Consider representing the perimeter of each tree as four corners (they mark a square rotated 45 degrees). For each tree compute it's perimeter intersection with the current intersection. The difficulty comes with managing the corners of the intersection, which could include more than one point because of the diagonal alignments. Run inside the final intersection to count how many empty spots are within it.

Source https://stackoverflow.com/questions/69075779

QUESTION

Fastest way to clear group with a lot of shapes / multithreading

Asked 2022-Feb-21 at 20:14

In my JavaFX project I'm using a lot of shapes(for example 1 000 000) to represent geographic data (such as plot outlines, streets, etc.). They are stored in a group and sometimes I have to clear them (for example when I'm loading a new file with new geographic data). The problem: clearing / removing them takes a lot of time. So my idea was to remove the shapes in a separate thread which obviously doesn't work because of the JavaFX singlethread.

Here is a simplified code of what I'm trying to do:

HelloApplication.java

...

ANSWER

Answered 2022-Feb-21 at 20:14

The long execution time comes from the fact that each child of a Parent registers a listener with the disabled and treeVisible properties of that Parent. The way JavaFX is currently implemented, these listeners are stored in an array (i.e. a list structure). Adding the listeners is relatively low cost because the new listener is simply inserted at the end of the array, with an occasional resize of the array. However, when you remove a child from its Parent and the listeners are removed, the array needs to be linearly searched so that the correct listener is found and removed. This happens for each removed child individually.

So, when you clear the children list of the Group you are triggering 1,000,000 linear searches for both properties, resulting in a total of 2,000,000 linear searches. And to make things worse, the listener to be removed is either--depending on the order the children are removed--always at the end of the array, in which case there's 2,000,000 worst case linear searches, or always at the start of the array, in which case there's 2,000,000 best case linear searches, but where each individual removal results in all remaining elements having to be shifted over by one.

There are at least two solutions/workarounds:

Don't display 1,000,000 nodes. If you can, try to only display nodes for the data that can actually be seen by the user. For example, the virtualized controls such as ListView and TableView only display about 1-20 cells at any given time.
Don't clear the children of the Group. Instead, just replace the old Group with a new Group. If needed, you can prepare the new Group in a background thread.

Doing it that way, it took 3.5 seconds on my computer to create another Group with 1,000,000 children and then replace the old Group with the new Group. However, there was still a bit of a lag spike due to all the new nodes that needed to be rendered at once.

If you don't need to populate the new Group then you don't even need a thread. In that case, the swap took about 0.27 seconds on my computer.

Source https://stackoverflow.com/questions/70265896

QUESTION

Delegate mouse events to all children in a JavaFX StackPane

Asked 2022-Feb-09 at 18:34

I'm trying to come up with a solution to allow multiple Pane nodes handle mouse events independently when assembled into a StackPane

...

ANSWER

Answered 2022-Feb-09 at 18:34

Using the hint from @jewelsea I was able to use a custom chain. I've done this from a "catcher" Pane which is added to the front of the StackPane. This then builds a chain using all the children, in reverse order, excluding itself.

Source https://stackoverflow.com/questions/71053623

QUESTION

ggplot2: Projecting points or distribution on a non-orthogonal (eg, -45 degree) axis

Asked 2022-Feb-06 at 17:04

The figure below is a conceptual diagram used by Michael Clark, https://m-clark.github.io/docs/lord/index.html to explain Lord's Paradox and related phenomena in regression.

My question is framed in this context and using ggplot2 but it is broader in terms of geometry & graphing.

I would like to reproduce figures like this, but using actual data. I need to know:

how to draw a new axis at the origin, with a -45 degree angle, corresponding to values of y-x
how to draw little normal distributions or density diagrams, or other representations of the values y-x projected onto this axis.

My minimal base example uses ggplot2,

...

ANSWER

Answered 2022-Feb-06 at 17:04

Fun question! I haven't encountered it yet, but there might be a package to help do this automatically. Here's a manual approach using two hacks:

the clip = "off" parameter of the coord_* functions, to allow us to add annotations outside the plot area.
building a density plot, extracting its coordinates, and then rotating and translating those.

First, we can make a density plot of the change from initial to final, seeing a left skewed distribution:

Source https://stackoverflow.com/questions/71001954

QUESTION

Get the "map" object in Mapbox-GL react native

Asked 2022-Jan-18 at 08:48

I have a code like that:

...

ANSWER

Answered 2022-Jan-18 at 08:48

The moveTo method belongs to Camera object. ref.

I don't have the environment setuped to test. The code will look something like this:

Source https://stackoverflow.com/questions/70674383

QUESTION

Problem resizing plot on tkinter figure canvas

Asked 2022-Jan-15 at 02:30

Python 3.9 on Mac running OS 11.6.1. My application involves placing a plot on a frame inside my root window, and I'm struggling to get the plot to take up a larger portion of the window. I thought rcParams in matplotlib.pyplot would take care of this, but I must be overlooking something.

Here's what I have so far:

...

ANSWER

Answered 2022-Jan-14 at 23:23

try something like this:

Source https://stackoverflow.com/questions/70598913

QUESTION

how to find the nearest LINESTRING to a POINT?

Asked 2022-Jan-14 at 23:17

How do I fund the nearest LINESTRING near a point?

First I have a list of LINESTRING and point value. How do I have the nearest LINESTRING to the POINT (5.41 3.9) and maybee the distance?

...

ANSWER

Answered 2022-Jan-14 at 23:17

your sample geometry is invalid for line strings, have modified
it's simple to achieve with sjoin_nearest()

Source https://stackoverflow.com/questions/70626218

QUESTION

Efficient code for custom color formatting in tkinter python

Asked 2022-Jan-11 at 14:31

[Editing this question completely] Thank you , for those who helped in building the Periodic Table successfully . As I completed it , I tried to link it with another of my project E-Search , which acts like Google and fetches answers , except that it will fetch me the data of the Periodic Table .

But , I got a problem - not with the searching but with the layout . I'm trying to layout the x-scrollbar in my canvas which will display results regarding the search . However , it is not properly done . Can anyone please help ?

Below here is my code :

...

ANSWER

Answered 2021-Dec-29 at 20:33

I rewrote your code with some better ways to create table. My idea was to pick out the buttons that fell onto a range of type and then loop through those buttons and change its color to those type.

Source https://stackoverflow.com/questions/70506629

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Install geometry

You can download it from GitHub.

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