three.map.control

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.

DEMO

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 400 lines 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