111 lines
4.1 KiB
JavaScript
111 lines
4.1 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, Vector2} from "three";
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export class MapHeightControls {
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/**
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* @param cameraHeightStiffness {number}
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* @param targetHeightStiffness {number}
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*/
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constructor(cameraHeightStiffness, targetHeightStiffness) {
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this.manager = null;
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this.cameraHeightStiffness = cameraHeightStiffness;
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this.targetHeightStiffness = targetHeightStiffness;
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this.maxAngle = Math.PI / 2;
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this.targetHeight = 0;
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this.cameraHeight = 0;
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this.lastTarget = new Vector2();
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this.lastTargetTerrainHeight = 0;
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this.minCameraHeight = 0;
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this.distanceTagretHeight = 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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}
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stop() {}
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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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// adjust target height
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this.updateHeights(delta, map);
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this.manager.position.y = Math.max(this.manager.position.y, this.getSuggestedHeight());
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}
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updateHeights(delta, map) {
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//target height
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let targetSmoothing = this.targetHeightStiffness / (16.666 / delta);
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targetSmoothing = MathUtils.clamp(targetSmoothing, 0, 1);
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let targetTerrainHeight = this.lastTargetTerrainHeight;
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if (this.lastTarget.x !== this.manager.position.x || this.lastTarget.y !== this.manager.position.z){
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targetTerrainHeight = map.terrainHeightAt(this.manager.position.x, this.manager.position.z) || 0;
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this.lastTargetTerrainHeight = targetTerrainHeight;
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this.lastTarget.set(this.manager.position.x, this.manager.position.z);
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}
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let targetDelta = targetTerrainHeight - this.targetHeight;
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this.targetHeight += targetDelta * targetSmoothing;
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if (Math.abs(targetDelta) < 0.001) this.targetHeight = targetTerrainHeight;
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// camera height
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this.minCameraHeight = 0;
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if (this.maxAngle >= 0.1) {
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let cameraSmoothing = this.cameraHeightStiffness / (16.666 / delta);
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cameraSmoothing = MathUtils.clamp(cameraSmoothing, 0, 1);
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let cameraTerrainHeight = map.terrainHeightAt(this.manager.camera.position.x, this.manager.camera.position.z) || 0;
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let cameraDelta = cameraTerrainHeight - this.cameraHeight;
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this.cameraHeight += cameraDelta * cameraSmoothing;
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if (Math.abs(cameraDelta) < 0.001) this.cameraHeight = cameraTerrainHeight;
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let maxAngleHeight = Math.cos(this.maxAngle) * this.manager.distance;
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this.minCameraHeight = this.cameraHeight - maxAngleHeight + 1;
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}
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// adjust targetHeight by distance
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this.distanceTagretHeight = Math.max(MathUtils.lerp(this.targetHeight, 0, this.manager.distance / 500), 0);
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}
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getSuggestedHeight() {
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return Math.max(this.distanceTagretHeight, this.minCameraHeight);
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}
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} |