69 lines
1.8 KiB
JavaScript
69 lines
1.8 KiB
JavaScript
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const Cesium = window.Cesium;
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class ShuttleLineMaterialProperty {
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constructor(duration, image) {
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this._definitionChanged = new Cesium.Event();
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this.duration = duration;
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this.image = image;
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this._time = performance.now();
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}
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get isConstant() {
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return false;
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}
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get definitionChanged() {
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return this._definitionChanged;
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}
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getType() {
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return Cesium.Material.ShuttleLineType;
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}
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getValue(time, result) {
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if (!Cesium.defined(result)) {
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result = {};
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}
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result.image = this.image;
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result.time =
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((performance.now() - this._time) % this.duration) / this.duration;
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return result;
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}
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equals(other) {
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return (
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this === other ||
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(other instanceof ShuttleLineMaterialProperty &&
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this.duration === other.duration)
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);
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}
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}
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Object.defineProperties(ShuttleLineMaterialProperty.prototype, {
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color: Cesium.createPropertyDescriptor("color"),
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duration: Cesium.createPropertyDescriptor("duration"),
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});
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Cesium.ShuttleLineMaterialProperty = ShuttleLineMaterialProperty;
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Cesium.Material.ShuttleLineType = "ShuttleLine";
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Cesium.Material.ShuttleLineSource = `
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czm_material czm_getMaterial(czm_materialInput materialInput)
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{
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czm_material material = czm_getDefaultMaterial(materialInput);
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vec2 st = materialInput.st;
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vec4 colorImage = texture2D(image, vec2(fract(st.s - time), st.t));
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material.alpha = colorImage.a;
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material.diffuse = colorImage.rgb * 1.5 ;
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return material;
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}
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`;
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Cesium.Material._materialCache.addMaterial(Cesium.Material.ShuttleLineType, {
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fabric: {
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type: Cesium.Material.ShuttleLineType,
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uniforms: {
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color: new Cesium.Color(1, 0, 0, 1),
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image: "",
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transparent: true,
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time: 20,
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},
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source: Cesium.Material.ShuttleLineSource,
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},
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translucent: function () {
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return true;
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},
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});
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