Geometric algorithms region pointer Whether the coordinates are within the shape area algorithm How to check if a given point lies inside or outside a polygon?

How to create an algorithm that can determine if a point is contained in an irregular polygon defined by the points of its corners
ray casting algorithm
https://en.wikipedia.org/wiki/Ray_casting
https://www.researchgate.net/figure/Illustration-of-the-Ray-Casting-Algorithm_fig5_259468883

https://gistbok.ucgis.org/bok-topics/geometric-primitives-and-algorithms
Computational Geometry Algorithms and Applications
https://www.geeksforgeeks.org/geometric-algorithms/
https://www.geeksforgeeks.org/c-program-find-area-triangle/
https://demonstrations.wolfram.com/AnEfficientTestForAPointToBeInAConvexPolygon/
https://www.sciencedirect.com/science/article/pii/S0925772115000759
https://www.geeksforgeeks.org/how-to-check-if-a-given-point-lies-inside-a-polygon/

ray casting algorithm Geometric algorithms region pointer Whether the coordinates are within the shape area
https://www.scribd.com/document/56214673/Ray-Casting-Algorithm
https://rosettacode.org/wiki/Ray-casting_algorithm
https://stackoverflow.com/questions/217578/how-can-i-determine-whether-a-2d-point-is-within-a-polygon
https://octave.sourceforge.io/geometry/function/clipPolygon_clipper.html
https://www.researchgate.net/figure/An-example-of-no-fit-polygon-NFP_fig7_228553279