points

来源： https://stackoverflow.com/questions/40920505/python-3-x-finding-saddle-points-in-a-matrix

来源： https://stackoverflow.com/questions/40920505/python-3-x-finding-saddle-points-in-a-matrix

来源： https://stackoverflow.com/questions/52500239/best-match-between-two-sets-of-points

来源： https://stackoverflow.com/questions/52500239/best-match-between-two-sets-of-points

问题 I want to make a reward points app, for that i use a random function. The problem is i don't know how to add this number to the previous number. to get sum points. And here is the result i want to have the sum point here . After modification i get this error here is the complete code for my reward app rewards.dart import 'dart:async'; import 'package:fid786/Services/CardScreen.dart'; import 'package:flutter/material.dart'; import 'package:flutter/services.dart'; import 'package:fid786/styles

问题 I know there exist some functions like lineRenderer etc, but I want to create a straight line in the scene using two points(in Vector3 form). I don't want to draw the line by using any key or using the mouse, I just want to see the line in the scene when I trigger some event or just after I click play button. Can anyone help me? 回答1: Ok, I've figured it out by using LineRenderer like this: var line: GameObject=GameObject.Find("/LineRenderer"); fence = Instantiate(line,Pos,Rotation); fence

问题 So lets say I have 10,000 points in A and 10,000 points in B and want to find out the closest point in A for every B point. Currently, I simply loop through every point in B and A to find which one is closest in distance. ie. B = [(.5, 1, 1), (1, .1, 1), (1, 1, .2)] A = [(1, 1, .3), (1, 0, 1), (.4, 1, 1)] C = {} for bp in B: closestDist = -1 for ap in A: dist = sum(((bp[0]-ap[0])**2, (bp[1]-ap[1])**2, (bp[2]-ap[2])**2)) if(closestDist > dist or closestDist == -1): C[bp] = ap closestDist =

问题 I'm trying to draw an arbitrary quadrilateral over an image using the polylines function in opencv. When I do I get the following error OpenCV Error: Assertion failed (p.checkVector(2, CV_32S) >= 0) in polylines, file /tmp/buildd/ros-fuerte-opencv2-2.4.2-1precise-20130312-1306/modules/core/src/d rawing.cpp, line 2065 I call the function as like so, cv2.polylines(img, points, 1, (255,255,255)) Where points is as numpy array as shown below (The image size is 1280x960): [[910 641] [206 632] [696

问题 A friend to me made a flash game for my website. The game makes a request to /game/p00ints.php with the points in $_POST['points']. But, a hacker can easy find out how to get more points I guess, so, how can my friend or I fix this security hole? Best regards, Erik Persson 回答1: The way to fix this is have all the point calculation on the server and have the client send raw input (e.g. hold left arrow key 1 second, enter key press, hold left mouse button 2 seconds, etc.). Even then, attackers

问题 A friend to me made a flash game for my website. The game makes a request to /game/p00ints.php with the points in $_POST['points']. But, a hacker can easy find out how to get more points I guess, so, how can my friend or I fix this security hole? Best regards, Erik Persson 回答1: The way to fix this is have all the point calculation on the server and have the client send raw input (e.g. hold left arrow key 1 second, enter key press, hold left mouse button 2 seconds, etc.). Even then, attackers