point

问题 I have asked another question, which was closed as Too Broad. Now, I will try to specify. Again, I would like to simulate a 1-dimensional point process in R. So far, I've only been working on 2-dimensional simulations and would need a bit of help. My goal is a simulation like in the picture But, I only need the real line with the random points on it. I use spatstat and have already found out that I can generate random points on a 1-dim Line with: rpoisppOnLines(lambda, L, lmax = NULL, ...,

问题 I am trying to create a single point within a polygon using a class for use in an agent based model. Currently I am able to create random points constrained to the bounds of the polygon, but not the polygon itself. My code at present appears to ignore the if statement within the while loop. I am very new to python so this could be a limitation I am missing. Here is my current code: import geopandas as gpd import matplotlib.pyplot as plt import random import pandas as pd bounds = gpd.read_file

问题 I am trying to create a single point within a polygon using a class for use in an agent based model. Currently I am able to create random points constrained to the bounds of the polygon, but not the polygon itself. My code at present appears to ignore the if statement within the while loop. I am very new to python so this could be a limitation I am missing. Here is my current code: import geopandas as gpd import matplotlib.pyplot as plt import random import pandas as pd bounds = gpd.read_file

问题 I have the Polygon data from the States from the USA from the website arcgis and I also have an excel file with coordinates of citys. I have converted the coordinates to geometry data (Points). Now I want to test if the Points are in the USA. Both are dtype: geometry. I thought with this I can easily compare, but when I use my code I get for every Point the answer false. Even if there are Points that are in the USA. The code is: import geopandas as gp import pandas as pd import xlsxwriter

问题 I've recorded my track to a text file and now I'd like to insert it into SQL Server 2008 R2 database's table as a Point type. I read my text file using OpenRowSet and insert each line into temporary table. Then I parse every row and insert right values to real table. Each row in file looks like: $GPRMC,101142.415,A,6210.1547,N,02929.2220,E,3.9,231.8,150310,,,A*62 I'm parsing latitude and longitude with such a code: INSERT INTO Track(Point) SELECT geography::Point( SUBSTRING(entry,21,2)+'.'

问题 I've recorded my track to a text file and now I'd like to insert it into SQL Server 2008 R2 database's table as a Point type. I read my text file using OpenRowSet and insert each line into temporary table. Then I parse every row and insert right values to real table. Each row in file looks like: $GPRMC,101142.415,A,6210.1547,N,02929.2220,E,3.9,231.8,150310,,,A*62 I'm parsing latitude and longitude with such a code: INSERT INTO Track(Point) SELECT geography::Point( SUBSTRING(entry,21,2)+'.'

问题 i have the following geometrical issue in 2D: i have a point from which i cast an infinite angle (2D-cone) which is given by a direction and an angle. (the point and the direction form a vector and to each side half of the angle forms the 2D-cone) now i want to check if another point in 2D is inside this cone or outside. how can this be achieved? thanks! 回答1: Calculate the vector from the center of the cone to the query point. Normalize the vector to be of length 1, Take the center vector of

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . I'm trying to plot 3D points onto a 2D surface (I'm currently working with SDL.NET as my 'game engine'). The surface will be 800x400 pixels in size and the 3d coordinates will range from -4000 to 4000. My view

问题 I wanted to ask you if anyone knew how to check if a point was inside a given triangle, on a reference system in space. I am aware that speaking of 2d systems I can obtain this point with the following procedures: To determine if a given point v lies within a given triangle, consider a single vertex, denoted v0, v1 and v2 are the vectors from the other two vertices v0. Expressing the vector from v0 to v in terms of v1 and v2 then gives v = v0 + av1 + bv2 where a, b are constant. Solve for a,

问题 I find the trilinear coordinates of the coordinate of the point of intersection through the barycentric coordinates. Barycentric coordinates are correct (seemingly). private const double Epsilon = 0.000001d; public static Vector3? GetPointIntersectionRayAndTriangle(Vector3 rayOrigin, Vector3 rayDirection, Vector3 vert0, Vector3 vert1, Vector3 vert2) { Vector3 edge1 = new Vector3(); Vector3 edge2 = new Vector3(); Vector3 tvec = new Vector3(); Vector3 pvec = new Vector3(); Vector3 qvec = new