maps

public class MyCache { AbstractMap<String, AbstractMap<String, Element>> cache = new TreeMap<String, AbstractMap<String, Element>>(); public Boolean putElement(String targetNamespace, Element element) { ... } public void clear() { cache.clear(); } // is it better this way? public void deepClear() { for(AbstractMap<String, Element> innerMap : cache.values()) { innerMap.clear(); } cache.clear(); } } Is it necessary to iterate over the values of the root map and clear all the maps nested in the root first, or is it enough to clear the outermost map? My main question is, if there is any difference

Mike Bostock shared a range of world wide topojson files. As I wanted more data and higher quality, I now generate my own high quality topojson files from Natural Earth. To make it simple, my makefile / command is such: admin_0: crop ../node_modules/topojson/bin/topojson \ --id-property name \ -p name=name \ -q 1e4 \ --filter=small \ -o admin_0.topo.json \ -- admin_0=./natural_earth_vector/10m_cultural/ne_10m_admin_0_countries.shp But my 3MB .topojson is crispy, nasty, graphically messy. Take a look at the coastline, you will see the most annoying thing : lines looking like "stairs" :

添加一个叫做放射光贴图(Emission Map)的东西，它是一个储存了每个片段的发光值(Emission Value)的贴图。发光值是一个包含（假设）光源的物体发光(Emit)时可能显现的颜色，这样的话物体就能够忽略光照条件进行发光(Glow)。游戏中某个物体在发光的时候，你通常看到的就是放射光贴图（比如 机器人的眼，或是箱子上的灯带）。将这个纹理（作者为 creativesam）作为放射光贴图添加到箱子上，产生这些字母都在发光的效果 片段着色器代码： 1 #version 330 core 2 struct Material { 3 sampler2D diffuse; 4 sampler2D specular; 5 sampler2D emission; 6 float shininess; 7 }; 8 9 struct Light { 10 vec3 position; 11 12 vec3 ambient; 13 vec3 diffuse; 14 vec3 specular; 15 }; 16 17 in vec2 TexCoords; 18 in vec3 Normal; 19 in vec3 FragPos; 20 out vec4 FragColor; 21 22 uniform Material material; 23 uniform Light light;

尝试在片段着色器中反转镜面光贴图的颜色值，让木头显示镜面高光而钢制边缘不反光（由于钢制边缘中有一些裂缝，边缘仍会显示一些镜面高光，虽然强度会小很多） 1 #version 330 core 2 out vec4 FragColor; 3 4 struct Material { 5 sampler2D diffuse; 6 sampler2D specular; 7 float shininess; 8 }; 9 10 struct Light { 11 vec3 position; 12 13 vec3 ambient; 14 vec3 diffuse; 15 vec3 specular; 16 }; 17 18 in vec3 FragPos; 19 in vec3 Normal; 20 in vec2 TexCoords; 21 22 uniform vec3 viewPos; 23 uniform Material material; 24 uniform Light light; 25 26 void main() 27 { 28 // ambient 29 vec3 ambient = light.ambient * vec3(texture(material.diffuse, TexCoords)); 30 31 // diffuse 32 vec3 norm =

setAutocomplete() { this.originPlaceId = null; this.destinationPlaceId = null; this.travelMode = google.maps.TravelMode.WALKING; this.directionsDisplay.setMap(this.map); this.setMapControls(this.map); this.setupClickListener('changemode-walking', google.maps.TravelMode.WALKING); this.setupClickListener('changemode-transit', google.maps.TravelMode.TRANSIT); this.setupClickListener('changemode-driving', google.maps.TravelMode.DRIVING); console.log(this.originInput); this.originAutocomplete = new google.maps.places.Autocomplete(this.originInput); this.originAutocomplete.bindTo('bounds', this.map)

I have code that looks essentially like this: std::map<int, int> map1, map2; BOOST_FOREACH(int i, map1) { // do steps 1-5 here... } BOOST_FOREACH(int i, map2) { // do steps 1-5 (identical to above) here... } Is there any way to concatenate the maps to eliminate the duplicate code in the second loop? Or a way to extend BOOST_FOREACH to iterate over two different maps in one go? Obviously I don't want to increase the time complexity of the program (otherwise I could just create a new map and insert into it map1 and map2). I have a feeling I am missing something rudimentary here. You could define

I have already developed an Android Here map which has a simple map view but I need to add offline support to the app, how can I add it to my app in order to let the user download a specific country or area? Note that I implemented my app using the tutorial in the link below: https://developer.here.com/mobile-sdks/documentation/android-hybrid-plus/topics/maps.html See the Offline Maps section of the mobile sdk documentation. In particular, you might want to use the following methods of the MapLoader class: installMapPackages(List<Integer> packageIdList) - To download and install new country or