intersect

UIBezierPath intersect

由 三世轮回 提交于 2019-11-26 17:14:23
问题 I've been searching for an answer for hours but have trouble finding anything on the topic. I have a question related to Objective-c. I'm making an application in which a UIView checks for touches from the user and if the user touches and moves his/her finger, a path using UIBezierPath is drawn. If the user draws so that the path intersects itself it should disappear from the screen. When the user is done drawing the pattern, a line from the last point in the path should connect with the

How do I compute the intersection point of two lines?

由 心已入冬 提交于 2019-11-26 15:52:42
I have two lines that intersect at a point. I know the endpoints of the two lines. How do I compute the intersection point in Python? # Given these endpoints #line 1 A = [X, Y] B = [X, Y] #line 2 C = [X, Y] D = [X, Y] # Compute this: point_of_intersection = [X, Y] Unlike other suggestions, this is short and doesn't use external libraries like numpy . (Not that using other libraries is bad...it's nice not need to, especially for such a simple problem.) def line_intersection(line1, line2): xdiff = (line1[0][0] - line1[1][0], line2[0][0] - line2[1][0]) ydiff = (line1[0][1] - line1[1][1], line2[0]

C# Linq intersect/except with one part of object

由 一个人想着一个人 提交于 2019-11-26 12:29:14
问题 I\'ve got a class: class ThisClass { private string a {get; set;} private string b {get; set;} } I would like to use the Intersect and Except methods of Linq, i.e.: private List<ThisClass> foo = new List<ThisClass>(); private List<ThisClass> bar = new List<ThisClass>(); Then I fill the two lists separately. I\'d like to do, for example (and I know this isn\'t right, just pseudo code), the following: foo[a].Intersect(bar[a]); How would I do this? 回答1: Maybe // returns list of intersecting

Intersect with a custom IEqualityComparer using Linq

由 依然范特西╮ 提交于 2019-11-26 10:01:53
问题 Long story short: I have 2 collections of objects. One contains good values (Let\'s call it \"Good\"), the other default values (Mr. \"Default\"). I want the Intersect of the Union between Good and Default, and Default. In other words: Intersect(Union(Good, Default), Default). One might think it resolves as Default, but here is where it gets tricky : I use a custom IEqualityComparer. I got the following classes : class MyClass { public string MyString1; public string MyString2; public string

Alternative to Intersect in MySQL

由 ◇◆丶佛笑我妖孽 提交于 2019-11-26 00:14:47
问题 I need to implement the following query in MySQL. (select * from emovis_reporting where (id=3 and cut_name= \'全プロセス\' and cut_name=\'恐慌\') ) intersect ( select * from emovis_reporting where (id=3) and ( cut_name=\'全プロセス\' or cut_name=\'恐慌\') ) I know that intersect is not in MySQL. So I need another way. Please guide me. 回答1: Microsoft SQL Server's INTERSECT "returns any distinct values that are returned by both the query on the left and right sides of the INTERSECT operand" This is different
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