How to use CesiumJS to visualize data from a Session: Difference between revisions
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<code> | |||
// variables | |||
const dim = 128; | |||
const minLevel = 6; | |||
const maxLevel = 19; | |||
const tilepx = 512; | |||
// Construct the default list of terrain sources. | |||
var terrainModels = []; | |||
terrainModels.push(new Cesium.ProviderViewModel({ | |||
name: "Project Terrain", | |||
category: "Terrain", | |||
iconUrl: Cesium.buildModuleUrl('Widgets/Images/TerrainProviders/Ellipsoid.png'), | |||
creationFunction: function () { | |||
return new Cesium.CustomHeightmapTerrainProvider({ | |||
width: dim, | |||
height: dim, | |||
maximumLevel: maxLevel, | |||
callback: function (x, y, level) { | |||
if (level <= 10) { // ignore zoom levels 10 and lower | |||
return new Float32Array(dim * dim); // all zeros | |||
} | |||
const test = Cesium.Resource.fetchArrayBuffer('terrain/' + level + '/' + x + '/' + y + '.bin?worlddatum=true&token=$TOKEN&width=' + dim + '&height=' + dim); | |||
return test.then(function (buffer) { | |||
const array = new Float32Array(dim * dim); // all zeros | |||
const view = new DataView(buffer); | |||
for (let i = 0; i < dim * dim; i++) { | |||
array[i] = view.getFloat32(i * 4); | |||
} | |||
return array; | |||
}); | |||
}, | |||
}); | |||
} | |||
})); | |||
</code> | |||
{{article end | {{article end | ||
Revision as of 12:50, 1 March 2024
// variables
const dim = 128;
const minLevel = 6;
const maxLevel = 19;
const tilepx = 512;
// Construct the default list of terrain sources.
var terrainModels = [];
terrainModels.push(new Cesium.ProviderViewModel({
name: "Project Terrain",
category: "Terrain",
iconUrl: Cesium.buildModuleUrl('Widgets/Images/TerrainProviders/Ellipsoid.png'),
creationFunction: function () {
return new Cesium.CustomHeightmapTerrainProvider({
width: dim,
height: dim,
maximumLevel: maxLevel,
callback: function (x, y, level) {
if (level <= 10) { // ignore zoom levels 10 and lower
return new Float32Array(dim * dim); // all zeros
}
const test = Cesium.Resource.fetchArrayBuffer('terrain/' + level + '/' + x + '/' + y + '.bin?worlddatum=true&token=$TOKEN&width=' + dim + '&height=' + dim);
return test.then(function (buffer) {
const array = new Float32Array(dim * dim); // all zeros
const view = new DataView(buffer);
for (let i = 0; i < dim * dim; i++) {
array[i] = view.getFloat32(i * 4);
}
return array;
});
},
});
}
}));