tile

I'm going to start programming a 2D tile-based game in Qt and read about the QGraphicsScene and QGraphicsView classes which are intended for displaying and handling lots of 2D objects. My question is that will it be feasible to create a world with lots of tiles using QGraphicsScene? Can I add the whole world at once tile-by-tile or should I try to implement something to restrict the area a bit? I've read that QGraphicsScene can handle "thousands of items" but a 2D tile map can easily get really, really big (200x200 tiles? not that many, but that's already 40,000 objects which is a lot). The

I would like my TileOverlay to behave like the real Google Maps. When you zoom in, the tile is still visible but pixelized until the new tile is downloaded. The current behavior is: when you zoom in, tiles disappear and you see the ugly grid, and the user has to wait until the new tiles are loaded. This is kind of annoying. Is there a solution to this problem? I worked around this issue by "preloading" all zoomlevels before showing the map (just a copy/paste of the current state, need to clean up): @UiThread private void preloadAllZoomLevels(final float zoomLevel) { if (zoomLevel == map

I have a working iOS prototype using the iOS tile-caching technique as shown below (Objective-C code): RMTileCache * tileCache = [[RMTileCache alloc] initWithExpiryPeriod:0]; [tileCache setBackgroundCacheDelegate:self]; RMMapboxSource * tileSource = [[RMMapboxSource alloc] initWithMapID:mapID]; [tileCache beginBackgroundCacheForTileSource:tileSource southWest:southWest northEast:northEasth minZoom:minZoom maxZoom:maxZoom]; What this basically does is download the map, cache the tiles permanently and make it possible for the app to run offline in the future. Since we're going through the

I'm trying to make a game in HTML5 canvas, but instead of uploading a ton of images I want to just upload one image that has all of the tiles on it. The problem is, I don't know how to make only one part of the image show up. Basically I want to do what Google does with this image: http://www.google.com/images/srpr/nav_logo27.png except with fixed height/width tiles. Can someone explain to me how to do this? Also, if it's different in canvas than in a regular html page without canvas, how would I do it in canvas? gblazex You can use the slicing parameters of drawImage drawImage(image, sx, sy,

Im following this this tutorial to be able to load json map files created by tiled map editor in my javascript/canvas game. ive got to the point where i have implemented my own kind of version, and am getting no errors in firebug in console or net etc. And as far as i can see, by putting in console.logs and alerts, the script is running absolutely fine! The problem is the canvas stays blank! when it should have a tilemap now on it. Here is my version of the tutorial implemented in my game: function Level() { var c; var data; var layers = []; this.get_map = function(name,ctx){ c = ctx; $

I am currently working on Google Maps API V3 over here If you zoom between 21 to 23, there will be an image overlay on the map. The image takes too long to load and I have decided to break it into different tiles for easier loading. I am using Automatic Tile Cutter to cut the image into tiles. I have problems with the script; var OrgX = 31551; // the Google Maps X value of the tile at the top left corner of your Photoshop document var OrgY = 50899; // the Google Maps Y value of the tile at the top left corner of your Photoshop document First question How do you find the values of X and Y from