Created
April 12, 2011 16:10
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Quick and dirty map tile-generation
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| String imageName; | |
| String outputPath; | |
| boolean labelTiles = false; | |
| int tileSize = 256; | |
| PFont tileFont; | |
| PImage startImage; | |
| void setup() | |
| { | |
| size( tileSize, tileSize ); | |
| // smooth() | |
| imageName = selectInput("Choose an image to generate tiles from"); | |
| outputPath = selectFolder( "Choose a location to save the tiles" ); | |
| startImage = loadImage( imageName ); | |
| tileFont = createFont( "Arial", 12 ); | |
| textFont( tileFont ); | |
| stroke( 0 ); | |
| noFill(); | |
| saveTiles(); | |
| exit(); | |
| } | |
| void saveTiles() | |
| { | |
| int columns = startImage.width / tileSize; | |
| int rows = startImage.height / tileSize; | |
| int zoom = int( log( rows ) / log( 2 ) ); | |
| for ( int x = 0; x < columns; x++ ) | |
| { | |
| for ( int y = 0; y < rows; y++ ) | |
| { | |
| PGraphics tile = createGraphics( tileSize, tileSize, P2D ); | |
| tile.beginDraw(); | |
| tile.image( startImage.get( x * tileSize, y * tileSize, tileSize, tileSize ), 0, 0 ); | |
| // label the tile | |
| if ( labelTiles ) | |
| { | |
| tile.noStroke(); | |
| tile.fill( 0, 255, 255 ); | |
| tile.text( str(x) + ":" + str(y) + ":z" + str(zoom), 8, 24 ); | |
| } | |
| tile.endDraw(); | |
| tile.save( outputPath + "/" + str(zoom) + "/" + str(x) + "." + str(y) + ".png" ); | |
| } | |
| } | |
| } |
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| <html> | |
| <head> | |
| <title>Polymaps Learning</title> | |
| <meta name="author" content="David Wicks"/> | |
| <!-- Date: 2011-04-11 --> | |
| <!-- Get polymaps for this to work: http://polymaps.org/ --> | |
| <script type="text/javascript" src="lib/polymaps.min.js"></script> | |
| <script type="text/javascript"> | |
| function run() | |
| { | |
| var po = org.polymaps; | |
| var ck = new Date().getMilliseconds(); | |
| var map = po.map() | |
| .container(document.getElementById("map").appendChild(po.svg("svg"))) | |
| .center({lat: 40, lon: -95}) | |
| .zoomRange([1, 4]) | |
| .zoom(2) | |
| .add(po.interact()); | |
| map.add(po.image().url("tiles/{Z}/{X}.{Y}.png?ck=" + ck )); | |
| map.add(po.compass() | |
| .pan("none")); | |
| map.container().setAttribute("class", "Blues"); | |
| } | |
| </script> | |
| </head> | |
| <body onload="run();"> | |
| <h1>Some Map</h1> | |
| <div id="map"></div> | |
| </body> | |
| </html> |
Plays nicely with Polymaps.
Now we ask the user for what file to load and where to save up front.
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Determines correct map zoom level from loaded image size. Also, makes tiles from a given image rather than from some made up stuff.