网址：https://github.com/anvaka/three.map.control
在threejs群里发现的一个很有意思的问题之前没有接触过：
存在的问题：
我在微信小游戏中，用orbit也会出现计算错误的情况，动一下就不见了。
解决办法：
发现了， 原来是小游戏里面获取不到 element.clientWidth, 要替换成 window.innerWidth
three.map.control
Mobile friendly three.js camera that mimics 2d maps navigation with pan and zoom.
Features
- Touch friendly. Drag scene around with single finger touch, or zoom it with standard pinch gesture.
- Zoom into point. Use your mouse wheel to zoom into particular point on the scene.
- Easing. When you pan around, the movement does not stop immediately. Smooth kinetic panning gives natural feel to it.
- Tiny. It's less than
400lines of documented code.
usage
// let's say you have a standard THREE.js PerspectiveCamera:
var camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 3000 ); // To turn on a map-like navigation: var createPanZoom = require('three.map.control'); // We assume that three.js scene is hosted inside DOM element `container` var panZoom = createPanZoom(camera, container); // That's it. panZoom wil now listen to events from `container`. You can pan and // zoom with your mouse or fingers (on touch device) // If you want to dispose three.js scene, make sure to call: panZoom.dispose();
events
// the panZoom api fires events when something happens,
// so that you can react to user actions:
panZoom.on('panstart', function() { // fired when users begins panning (dragging) the surface console.log('panstart fired'); }); panZoom.on('panend', function() { // fired when user stpos panning (dragging) the surface console.log('panend fired'); }); panZoom.on('beforepan', function(panPayload) { // fired when camera position will be changed. console.log('going to move camera.position.x by: ' + panPayload.dx); console.log('going to move camera.position.y by: ' + panPayload.dy); }); panZoom.on('beforezoom', function(panPayload) { // fired when befor zoom in/zoom out console.log('going to move camera.position.x by: ' + panPayload.dx); console.log('going to move camera.position.y by: ' + panPayload.dy); console.log('going to move camera.position.z by: ' + panPayload.dz); });
license
MIT