-
# 判断点是否在多边形内 — 射线法 | Loudly Learning
最近在工作中用到了这个算法，抽空做一个笔记。
判断一个点是否在多边形内部的问题在很多地方都会碰到，最常用的方法就是射线法。
射线法 以点P为端点，向左方作射线L，由于多边形是有界的，所以射线L的左端一定在多边形外，考虑沿着L从无穷远处开始自左向右移动，遇到和多边形的第一个交点的时候，进入到了多边形的内部，遇到第二个
[…
-
In Version 1, the spatial CIMIS api (via et) has three main components. You can get station data, zipcode data, and point data from the system. The station and zipcode data are handled by an Oracale d…
-
Mach includes a collection of function to determine if various 2D primitives collides.
(this is related to https://github.com/hexops/mach/issues/1084)
The primitives in the collision module are:
…
-
I think the current supersplat controls are a good start and something you mostly find in small software-products. Here is a table, that shows how other software with 3D-Viewport is handling that.
…
-
From Caleb:
> One thing I noticed is that it is very hard to see where the kenya/rwanda examples in low zoom level. One way to get around this is to generate pmtiles that are centroids at low zoom …
-
We've been planning for a while to build a pip demo that uses index buffer objects and a viewport specified as a polygon for pip culling. This issue describes that project:
A web application is loa…
-
This would only require GeoInterface support, and would allow people to use predefined polygons a lot more easily, plus add support for holes in regions!
If you need a nice point in polygon test, Ras…
-
We need a function that generates a single from a point at different increment buffer distances.
## Signature:
Grid(bbox, country_boundary, cellsize, output_path, crs,buffer_distance, input_point_…
-
### Description of the bug
In Polygon::filter_points_by_vectors the comment say `and returns true if the point is to be copied to the output.`
but it's the `next_point ` that is copied in the output…
-
### Topic
Notebook
### Ask away!
Hello:
I'm successfully running the example for "spectral_indices" notebook, but when I try to adapt it to my case, it always fails to pass the s2.filter step (in…