direction

iPhone Accelerometer direction

匆匆过客 提交于 2020-01-07 02:05:07
问题 I am developing an application in which iPhone will play different sounds when moved (sword). I want to know when iPhone has moved left, right, up or down (sword movement). How can I implement this? I was testing the accelerometer and wrote this code, but it returns the same values if moved left or right. How can I know in which direction is the iPhone moved? Code: - (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration { double const kThreshold = 1

iPhone Accelerometer direction

旧街凉风 提交于 2020-01-07 02:05:06
问题 I am developing an application in which iPhone will play different sounds when moved (sword). I want to know when iPhone has moved left, right, up or down (sword movement). How can I implement this? I was testing the accelerometer and wrote this code, but it returns the same values if moved left or right. How can I know in which direction is the iPhone moved? Code: - (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration { double const kThreshold = 1

Redis 集群 lua 实现

▼魔方 西西 提交于 2020-01-05 00:27:44
二话不说,直接上货.多多交流哈,谢谢各路大神. . 重点就是下面这段: Object object = redisTemplate.execute(redisUpdateOrderScript, //这里有key 要像官网说的那样加个"{}",不然就报错了,这里3个key都要前缀一致 Arrays.asList(hkey, amountKey, key), //值无要求 amount.longValueExact(),price.doubleValue(),price.doubleValue()); 我自己的理解是,执行脚本和执行hget 是一样的,只是lua脚本内容由Redis执行,但发送命令的要求是一样的.所以上面3个key 都得加一样的前缀. . . . 业务逻辑是这样子的: 把20档盘口放到Redis里面 1.用有序集合(sorted set)进行自动价格排序 ZADD key 0.0354 "0.0354" 2.然后再根据价格到hash里去取值,取的val 就是这个价格的下单量 HGET key 0.0354 java 代码 加盘口 public void addOrderForLua(BeforeMatchDTO model) { //缓存失效 redisService.remove(RedisService.getPositionKey(model

API Google Maps doesn't return enough of step

十年热恋 提交于 2019-12-28 07:05:13
问题 I'm making an app with Xamarin.Forms.Maps and then, I need to get all of the steps between two "place id" to make my own polyline. However, when I'm making my request, I get about only thirty five steps. 35 steps.. Between Le Mans (France) and Paris (France).. About 200km but only 35 steps.. The problem isn't that the two points aren't connected to the polyline made, no, the problem is that the polyline get out of the existing road.. Google API direction seems to give me, only, some important

树莓派(4):寻迹小车

非 Y 不嫁゛ 提交于 2019-12-27 04:41:04
学习的时候百分之99参考了这篇文章 yzy_1996:【方法】树莓派小车自动循迹(摄像头): 具体内容都在里面了,因为我用的是L298N电机驱动模块,所以是用ENAB来控制PWM的,所以适当更改一下 因为我是在办公室地面,不像他一样有颜色清楚的轨道,所以修改了二值化类型和腐蚀膨胀的顺序系数 import RPi . GPIO as GPIO import time import cv2 as cv import numpy as np GPIO . setmode ( gpio . BOARD ) GPIO . setwarnings ( False ) INT1 = 11 INT2 = 12 INT3 = 13 INT4 = 15 ENA = 16 ENB = 18 # 设置GPIO口为输出 GPIO . setup ( INT1 , GPIO . OUT ) GPIO . setup ( INT2 , GPIO . OUT ) GPIO . setup ( INT3 , GPIO . OUT ) GPIO . setup ( INT4 , GPIO . OUT ) GPIO . setup ( ENA , GPIO . OUT ) GPIO . setup ( ENB , GPIO . OUT ) # 设置PWM波,频率为500Hz pwma = GPIO . PWM (

从零开始のcocos2dx生活(十)ScrollView

蓝咒 提交于 2019-12-26 15:37:14
目录 简介 基础变量 ScrollViewDelegate Direction _dragging _container _touchMoved _bounceable _touchLength 方法 create setContentSize deaccelerateScrolling maxContainerOffset 和 minContainerOffset 触摸的各阶段 onTouchBegan onTouchMoved onTouchEnded 简介 scrollView是在一定可视范围内通过滚动看到更大范围的方法,可视的范围是绑定在滚动视图上的容器。 容器有两个界限,一个是容器偏移,一个是为了回弹设置的延伸的长度。 基础变量 ScrollViewDelegate 设置委托函数实例,继承并重写下面的方法,可以在滚动和缩放时使用回调函数 virtual void scrollViewDidScroll(ScrollView* view) {}; virtual void scrollViewDidZoom(ScrollView* view) {}; //使用 scrollView->setDelegate(this); ///<添加委托 virtual void scrollViewDidScroll(ScrollView* view) { /* */ }

Google Maps API (JS) Create a route using PlaceId in waypoints

别等时光非礼了梦想. 提交于 2019-12-22 04:42:31
问题 The route create only if I use LatLng or String params but I need create it by PlaceId but it doesn't work example: directionsService.route({ origin: {'placeId': 'ChIJc1lGdwfP20YR3lGOMZD-GTM'}, destination: {'placeId': 'ChIJdTGhqsbP20YR6DZ2QMPnJk0'}, waypoints: [{stopover: true, location: new google.maps.Place('ChIJRVj1dgPP20YRBWB4A_sUx_Q')}], optimizeWaypoints: true, travelMode: google.maps.TravelMode.DRIVING } 回答1: Just need to pass the google.maps.Place object as the waypoint location. For

Google Maps API (JS) Create a route using PlaceId in waypoints

和自甴很熟 提交于 2019-12-22 04:42:07
问题 The route create only if I use LatLng or String params but I need create it by PlaceId but it doesn't work example: directionsService.route({ origin: {'placeId': 'ChIJc1lGdwfP20YR3lGOMZD-GTM'}, destination: {'placeId': 'ChIJdTGhqsbP20YR6DZ2QMPnJk0'}, waypoints: [{stopover: true, location: new google.maps.Place('ChIJRVj1dgPP20YRBWB4A_sUx_Q')}], optimizeWaypoints: true, travelMode: google.maps.TravelMode.DRIVING } 回答1: Just need to pass the google.maps.Place object as the waypoint location. For

Using Compass to point to actual coordinate location instead of just North

我只是一个虾纸丫 提交于 2019-12-21 20:59:25
问题 I have seen a few examples of this but am not sure exactly how to implement it, (such as iPhone Compass GPS Direction) in do I need to call calcBearingWithLatitude in (void)startup? All I am trying to do is have the compass pull a point from memory and use that point as its "north" so to speak and point to it, no need for distance or anything like that. My implementation file as of now looks like @implementation TrackerViewController @synthesize locationManager; @synthesize compass;

SceneKit – Get direction of camera

拥有回忆 提交于 2019-12-20 10:55:54
问题 I need to find out which direction a camera is looking at, e.g. if it is looking towards Z+ , Z- , X+ , or X- . I've tried using eulerAngles , but the range for yaw goes 0 -> 90 -> 0 -> -90 -> 0 which means I can only detect if the camera is looking towards Z or X , not if it's looking towards the positive or negative directions of those axes. 回答1: You can create an SCNNode that place it in worldFront property to get a vector with the x, y, and z direction. Another way you could do it is like