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<title>MapViewport</title>
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<h1>
<a href="../../index.html">lib.</a><a href="../index.html">pixi.</a
><a href="index.html">maps.</a>MapViewport
</h1>
<p>
The MapViewport works under the hood of a map layer to track the informations about the current focus point
and zoom position. This is important to maintain the same view when maps are changed.
</p>
<canvas id="canvas"></canvas>
<div id="mapControl"></div>
<div id="cityControl" class="controls"></div>
<p><strong>WHAT TO SEE:</strong> The map should focus Paris.</p>
<script>
let osmConfig = {
projection: 'mercator',
type: 'deepzoom',
tiles: {
tileSize: 256,
format: 'png',
overlap: 0,
type: 'map',
height: 1024,
width: 1024,
path: '../assets/maps/osm',
urlTileTemplate: '{path}/{level}/{row}/{column}.{format}'
}
}
let testConfig = {
projection: 'mercator',
type: 'deepzoom',
tiles: {
tileSize: 128,
format: 'jpg',
overlap: 0,
type: 'map',
height: 4096,
width: 4096,
path: '../assets/maps/test',
urlTileTemplate: '{path}/{level}/{row}/{column}.{format}'
}
}
</script>
<script class="doctest">
let capitals = {
london: { x: 51.5, y: -0.083333 },
rome: { x: 41.9, y: 12.483333 },
madrid: { x: 40.4, y: -3.683333 },
paris: { x: 48.833986, y: 2.346989 }
}
// You may define a focus point ...
let focus = capitals.paris
// ... and a zoom level.
let zoom = 1
// Name has to be app (like all other PIXIApps).
const app = (window.app = new MapApp({
focus,
zoom,
view: canvas,
coordsLogging: true,
width: 512,
height: 512
}))
// As map an image of europe is used.
let europe = '../assets/maps/pixabay/europe.jpg'
//Preload all required sprites for the image map.
app.loadSprites([europe], (sprites) => ready(sprites), {
resolutionDependent: false
})
// The map projection object contains informations,
// how the displayed map has to be interpreted.
// e.g. which projection is used or how the
// image is clipped.
let europeData = new MapProjection(new Projection.Mercator(), {
clip: {
min: { x: 32.863294, y: -18.58 },
max: { x: 57.467973, y: 44.277158 }
}
})
function ready(sprites) {
const cover = true
// When resources are loaded, the ImageMap can be instantiated.
let imageMap = new ImageMap(sprites.get(europe), europeData, {
coordsLogging: true,
maxScale: 1,
cover
})
let testMapProjection = new DeepZoomMapProjection(new Projection.Mercator(), testConfig.tiles, {
app
})
let testMap = new DeepZoomMap(testMapProjection, Object.assign({}, testConfig.tiles, { app }), {
cover
})
app.addMap('test', testMap)
let osmMapProjection = new DeepZoomMapProjection(new Projection.Mercator(), osmConfig.tiles, {
app
})
let deepZoomMap = new DeepZoomMap(osmMapProjection, Object.assign({}, osmConfig.tiles, { app }), {
cover
})
app.addMap('osm', deepZoomMap)
// Finally apply the map to the MapApp
app.setMap('europe', imageMap)
// The app requires a map before beeing able to run.
// So start the app here.
app.setup().run()
for (let [key, val] of Object.entries(app.mapList.maps)) {
let mapBtn = document.createElement('button')
mapBtn.innerText = key
mapBtn.addEventListener('click', () => {
app.mapLayer.changeMap(val)
})
mapControl.appendChild(mapBtn)
}
}
for (let [key, val] of Object.entries(capitals)) {
let cityBtn = document.createElement('button')
cityBtn.innerText = key
cityBtn.addEventListener('click', () => {
app.mapLayer.map.moveTo(val)
})
cityControl.appendChild(cityBtn)
}
</script>
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