137 lines
3.0 KiB
JavaScript
137 lines
3.0 KiB
JavaScript
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class PolylineTrailMaterialProperty {
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constructor(options) {
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options = Cesium.defaultValue(options, Cesium.defaultValue.EMPTY_OBJECT);
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this._definitionChanged = new Cesium.Event();
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this._color = undefined;
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this._colorSubscription = undefined;
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this.color = options.color;
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this.duration = options.duration;
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this.trailImage = options.trailImage;
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this._time = performance.now();
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}
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}
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Object.defineProperties(PolylineTrailMaterialProperty.prototype, {
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isConstant: {
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get: function() {
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return false;
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}
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},
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definitionChanged: {
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get: function() {
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return this._definitionChanged;
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}
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},
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color: Cesium.createPropertyDescriptor('color')
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});
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PolylineTrailMaterialProperty.prototype.getType = function(time) {undefined
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return 'PolylineTrail';
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}
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PolylineTrailMaterialProperty.prototype.getValue = function(time, result) {undefined
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if (!Cesium.defined(result)) {undefined
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result = {};
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}
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result.color = Cesium.Property.getValueOrClonedDefault(this._color, time, Cesium.Color.WHITE, result.color);
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//result.image = Cesium.Material.PolylineTrailImage;
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result.image = this.trailImage;
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result.time = ((performance.now() - this._time) % this.duration) / this.duration;
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return result;
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}
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PolylineTrailMaterialProperty.prototype.equals = function(other) {
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return this === other ||
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(other instanceof PolylineTrailMaterialProperty &&
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Cesium.Property.equals(this._color, other._color))
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}
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Cesium.Material.PolylineTrailType = 'PolylineTrail';
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Cesium.Material.PolylineTrailImage = "images/colors.png";
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Cesium.Material.PolylineTrailSource = `czm_material czm_getMaterial(czm_materialInput materialInput)\n\
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{\n\
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czm_material material = czm_getDefaultMaterial(materialInput);\n\
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vec2 st = materialInput.st;\n\
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vec4 colorImage = texture2D(image, vec2(fract(st.s - time), st.t));\n\
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material.alpha = colorImage.a * color.a;\n\
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material.diffuse = (colorImage.rgb+color.rgb)/2.0;\n\
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return material;\n\
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}`;
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Cesium.Material._materialCache.addMaterial(Cesium.Material.PolylineTrailType, {
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fabric: {
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type: Cesium.Material.PolylineTrailType,
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uniforms: {
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color: new Cesium.Color(1.0, 0.0, 0.0, 0.5),
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image: Cesium.Material.PolylineTrailImage,
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time: 0
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},
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source: Cesium.Material.PolylineTrailSource
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},
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translucent: function(material) {
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return true;
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}
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});
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