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106 lines
4.4 KiB
JavaScript
106 lines
4.4 KiB
JavaScript
/*
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* Copyright 2015-2017 WorldWind Contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* Illustrates how to create a placemark with a dynamically created image.
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*/
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requirejs(['./WorldWindShim',
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'./LayerManager'],
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function (WorldWind,
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LayerManager) {
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"use strict";
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// Tell WorldWind to log only warnings.
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WorldWind.Logger.setLoggingLevel(WorldWind.Logger.LEVEL_WARNING);
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// Create the WorldWindow.
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var wwd = new WorldWind.WorldWindow("canvasOne");
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// Add imagery layers.
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var layers = [
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{layer: new WorldWind.BMNGLayer(), enabled: true},
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{layer: new WorldWind.BMNGLandsatLayer(), enabled: false},
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{layer: new WorldWind.BingAerialWithLabelsLayer(null), enabled: true},
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{layer: new WorldWind.CompassLayer(), enabled: true},
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{layer: new WorldWind.CoordinatesDisplayLayer(wwd), enabled: true},
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{layer: new WorldWind.ViewControlsLayer(wwd), enabled: true}
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];
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for (var l = 0; l < layers.length; l++) {
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layers[l].layer.enabled = layers[l].enabled;
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wwd.addLayer(layers[l].layer);
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}
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var placemark,
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placemarkAttributes = new WorldWind.PlacemarkAttributes(null),
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highlightAttributes,
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placemarkLayer = new WorldWind.RenderableLayer("Placemarks"),
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latitude = 47.684444,
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longitude = -121.129722;
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// Set up the common placemark attributes.
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placemarkAttributes.imageScale = 1;
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placemarkAttributes.imageOffset = new WorldWind.Offset(
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WorldWind.OFFSET_FRACTION, 0.5,
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WorldWind.OFFSET_FRACTION, 0.5);
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placemarkAttributes.imageColor = WorldWind.Color.WHITE;
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// Create the custom image for the placemark.
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var canvas = document.createElement("canvas"),
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ctx2d = canvas.getContext("2d"),
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size = 64, c = size / 2 - 0.5, innerRadius = 5, outerRadius = 20;
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canvas.width = size;
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canvas.height = size;
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var gradient = ctx2d.createRadialGradient(c, c, innerRadius, c, c, outerRadius);
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gradient.addColorStop(0, 'rgb(255, 0, 0)');
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gradient.addColorStop(0.5, 'rgb(0, 255, 0)');
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gradient.addColorStop(1, 'rgb(255, 0, 0)');
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ctx2d.fillStyle = gradient;
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ctx2d.arc(c, c, outerRadius, 0, 2 * Math.PI, false);
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ctx2d.fill();
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// Create the placemark.
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placemark = new WorldWind.Placemark(new WorldWind.Position(latitude, longitude, 1e2), false, null);
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placemark.altitudeMode = WorldWind.RELATIVE_TO_GROUND;
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// Create the placemark attributes for the placemark.
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placemarkAttributes = new WorldWind.PlacemarkAttributes(placemarkAttributes);
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// Wrap the canvas created above in an ImageSource object to specify it as the placemark image source.
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placemarkAttributes.imageSource = new WorldWind.ImageSource(canvas);
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placemark.attributes = placemarkAttributes;
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// Create the highlight attributes for this placemark. Note that the normal attributes are specified as
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// the default highlight attributes so that all properties are identical except the image scale. You could
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// instead vary the color, image, or other property to control the highlight representation.
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highlightAttributes = new WorldWind.PlacemarkAttributes(placemarkAttributes);
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highlightAttributes.imageScale = 1.2;
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placemark.highlightAttributes = highlightAttributes;
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// Add the placemark to the layer.
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placemarkLayer.addRenderable(placemark);
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// Add the placemarks layer to the WorldWindow's layer list.
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wwd.addLayer(placemarkLayer);
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// Create a layer manager for controlling layer visibility.
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var layerManger = new LayerManager(wwd);
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// Now set up to handle highlighting.
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var highlightController = new WorldWind.HighlightController(wwd);
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}); |