92 lines
2.7 KiB
JavaScript
92 lines
2.7 KiB
JavaScript
/*
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* This file is part of BlueMap, licensed under the MIT License (MIT).
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*
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* Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
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* Copyright (c) contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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import {MathUtils} from "three";
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export class MouseZoomControls {
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/**
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* @param target {EventTarget}
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* @param speed {number}
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* @param stiffness {number}
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*/
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constructor(target, speed, stiffness) {
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this.target = target;
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this.manager = null;
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this.stiffness = stiffness;
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this.speed = speed;
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this.deltaZoom = 0;
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}
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/**
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* @param manager {ControlsManager}
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*/
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start(manager) {
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this.manager = manager;
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this.target.addEventListener("wheel", this.onMouseWheel, {passive: true});
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}
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stop() {
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this.target.removeEventListener("wheel", this.onMouseWheel);
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}
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/**
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* @param delta {number}
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* @param map {Map}
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*/
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update(delta, map) {
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if (this.deltaZoom === 0) return;
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let smoothing = this.stiffness / (16.666 / delta);
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smoothing = MathUtils.clamp(smoothing, 0, 1);
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this.manager.distance *= Math.pow(1.5, this.deltaZoom * smoothing * this.speed);
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this.deltaZoom *= 1 - smoothing;
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if (Math.abs(this.deltaZoom) < 0.0001) {
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this.deltaZoom = 0;
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}
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}
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reset() {
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this.deltaZoom = 0;
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}
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/**
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* @private
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* @param evt {WheelEvent}
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*/
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onMouseWheel = evt => {
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let delta = evt.deltaY;
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if (evt.deltaMode === WheelEvent.DOM_DELTA_PIXEL) delta *= 0.01;
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if (evt.deltaMode === WheelEvent.DOM_DELTA_LINE) delta *= 0.33;
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this.deltaZoom += delta;
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}
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} |