98 lines
2.4 KiB
JavaScript
98 lines
2.4 KiB
JavaScript
/*
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* @Description: 闪烁线材质
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* @Version: 1.0
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* @Author: Julian
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* @Date: 2022-03-30 16:40:09
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* @LastEditors: Julian
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* @LastEditTime: 2022-03-30 17:22:04
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*/
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class LineFlickerMaterialProperty {
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constructor(options) {
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this._definitionChanged = new Cesium.Event();
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this._color = undefined;
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this._speed = undefined;
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this.color = options.color;
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this.speed = options.speed;
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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(time) {
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return Cesium.Material.LineFlickerMaterialType;
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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.color = Cesium.Property.getValueOrDefault(
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this._color,
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time,
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Cesium.Color.RED,
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result.color
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);
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result.speed = Cesium.Property.getValueOrDefault(
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this._speed,
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time,
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5.0,
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result.speed
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);
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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 LineFlickerMaterialProperty &&
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Cesium.Property.equals(this._color, other._color) &&
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Cesium.Property.equals(this._speed, other._speed))
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);
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}
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}
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Object.defineProperties(LineFlickerMaterialProperty.prototype, {
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color: Cesium.createPropertyDescriptor("color"),
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speed: Cesium.createPropertyDescriptor("speed"),
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});
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Cesium.LineFlickerMaterialProperty = LineFlickerMaterialProperty;
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Cesium.Material.LineFlickerMaterialProperty = "LineFlickerMaterialProperty";
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Cesium.Material.LineFlickerMaterialType = "LineFlickerMaterialType";
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Cesium.Material.LineFlickerMaterialSource = `
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uniform vec4 color;
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uniform float speed;
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czm_material czm_getMaterial(czm_materialInput materialInput){
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czm_material material = czm_getDefaultMaterial(materialInput);
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float time = fract( czm_frameNumber * speed / 1000.0);
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vec2 st = materialInput.st;
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float scalar = smoothstep(0.5,1.0,time);
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material.diffuse = color.rgb * scalar;
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material.alpha = color.a * scalar ;
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return material;
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}
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`;
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Cesium.Material._materialCache.addMaterial(
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Cesium.Material.LineFlickerMaterialType,
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{
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fabric: {
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type: Cesium.Material.LineFlickerMaterialType,
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uniforms: {
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color: new Cesium.Color(1.0, 0.0, 0.0, 1.0),
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speed: 5.0,
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},
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source: Cesium.Material.LineFlickerMaterialSource,
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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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);
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