mirror of
https://github.com/manyfold3d/manyfold.git
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1251 lines
34 KiB
JavaScript
1251 lines
34 KiB
JavaScript
import {
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EventDispatcher,
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MOUSE,
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Quaternion,
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Spherical,
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TOUCH,
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Vector2,
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Vector3,
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Plane,
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Ray,
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MathUtils
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} from 'three'
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// OrbitControls performs orbiting, dollying (zooming), and panning.
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// Unlike TrackballControls, it maintains the "up" direction object.up (+Y by default).
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//
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// Orbit - left mouse / touch: one-finger move
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// Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
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// Pan - right mouse, or left mouse + ctrl/meta/shiftKey, or arrow keys / touch: two-finger move
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const _changeEvent = { type: 'change' }
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const _startEvent = { type: 'start' }
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const _endEvent = { type: 'end' }
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const _ray = new Ray()
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const _plane = new Plane()
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const TILT_LIMIT = Math.cos(70 * MathUtils.DEG2RAD)
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class OrbitControls extends EventDispatcher {
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constructor (object, domElement) {
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super()
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this.object = object
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this.domElement = domElement
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this.domElement.style.touchAction = 'none' // disable touch scroll
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// Set to false to disable this control
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this.enabled = true
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// "target" sets the location of focus, where the object orbits around
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this.target = new Vector3()
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// Sets the 3D cursor (similar to Blender), from which the maxTargetRadius takes effect
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this.cursor = new Vector3()
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// How far you can dolly in and out ( PerspectiveCamera only )
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this.minDistance = 0
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this.maxDistance = Infinity
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// How far you can zoom in and out ( OrthographicCamera only )
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this.minZoom = 0
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this.maxZoom = Infinity
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// Limit camera target within a spherical area around the cursor
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this.minTargetRadius = 0
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this.maxTargetRadius = Infinity
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// How far you can orbit vertically, upper and lower limits.
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// Range is 0 to Math.PI radians.
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this.minPolarAngle = 0 // radians
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this.maxPolarAngle = Math.PI // radians
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// How far you can orbit horizontally, upper and lower limits.
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// If set, the interval [ min, max ] must be a sub-interval of [ - 2 PI, 2 PI ], with ( max - min < 2 PI )
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this.minAzimuthAngle = -Infinity // radians
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this.maxAzimuthAngle = Infinity // radians
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// Set to true to enable damping (inertia)
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// If damping is enabled, you must call controls.update() in your animation loop
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this.enableDamping = false
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this.dampingFactor = 0.05
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// This option actually enables dollying in and out; left as "zoom" for backwards compatibility.
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// Set to false to disable zooming
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this.enableZoom = true
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this.zoomSpeed = 1.0
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this.keyZoomSpeed = 100.0
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// Set to false to disable rotating
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this.enableRotate = true
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this.rotateSpeed = 1.0
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this.keyRotateFactor = 1.0
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// Set to false to disable panning
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this.enablePan = true
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this.panSpeed = 1.0
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this.screenSpacePanning = true // if false, pan orthogonal to world-space direction camera.up
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this.keyPanSpeed = 7.0 // pixels moved per arrow key push
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this.zoomToCursor = false
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// Set to true to automatically rotate around the target
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// If auto-rotate is enabled, you must call controls.update() in your animation loop
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this.autoRotate = false
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this.autoRotateSpeed = 2.0 // 30 seconds per orbit when fps is 60
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// The four arrow keys
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this.keys = { LEFT: 'ArrowLeft', UP: 'ArrowUp', RIGHT: 'ArrowRight', BOTTOM: 'ArrowDown', IN: 'Equal', OUT: 'Minus' }
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// Mouse buttons
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this.mouseButtons = { LEFT: MOUSE.ROTATE, MIDDLE: MOUSE.DOLLY, RIGHT: MOUSE.PAN }
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// Touch fingers
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this.touches = { ONE: TOUCH.ROTATE, TWO: TOUCH.DOLLY_PAN }
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// for reset
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this.target0 = this.target.clone()
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this.position0 = this.object.position.clone()
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this.zoom0 = this.object.zoom
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// the target DOM element for key events
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this._domElementKeyEvents = null
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//
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// public methods
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//
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this.getPolarAngle = function () {
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return spherical.phi
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}
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this.getAzimuthalAngle = function () {
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return spherical.theta
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}
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this.getDistance = function () {
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return this.object.position.distanceTo(this.target)
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}
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this.listenToKeyEvents = function (domElement) {
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domElement.addEventListener('keydown', onKeyDown)
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this._domElementKeyEvents = domElement
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}
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this.stopListenToKeyEvents = function () {
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this._domElementKeyEvents.removeEventListener('keydown', onKeyDown)
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this._domElementKeyEvents = null
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}
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this.saveState = function () {
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scope.target0.copy(scope.target)
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scope.position0.copy(scope.object.position)
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scope.zoom0 = scope.object.zoom
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}
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this.reset = function () {
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scope.target.copy(scope.target0)
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scope.object.position.copy(scope.position0)
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scope.object.zoom = scope.zoom0
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scope.object.updateProjectionMatrix()
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scope.dispatchEvent(_changeEvent)
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scope.update()
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state = STATE.NONE
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}
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// this method is exposed, but perhaps it would be better if we can make it private...
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this.update = (function () {
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const offset = new Vector3()
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// so camera.up is the orbit axis
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const quat = new Quaternion().setFromUnitVectors(object.up, new Vector3(0, 1, 0))
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const quatInverse = quat.clone().invert()
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const lastPosition = new Vector3()
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const lastQuaternion = new Quaternion()
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const lastTargetPosition = new Vector3()
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const twoPI = 2 * Math.PI
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return function update (deltaTime = null) {
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const position = scope.object.position
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offset.copy(position).sub(scope.target)
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// rotate offset to "y-axis-is-up" space
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offset.applyQuaternion(quat)
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// angle from z-axis around y-axis
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spherical.setFromVector3(offset)
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if (scope.autoRotate && state === STATE.NONE) {
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rotateLeft(getAutoRotationAngle(deltaTime))
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}
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if (scope.enableDamping) {
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spherical.theta += sphericalDelta.theta * scope.dampingFactor
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spherical.phi += sphericalDelta.phi * scope.dampingFactor
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} else {
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spherical.theta += sphericalDelta.theta
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spherical.phi += sphericalDelta.phi
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}
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// restrict theta to be between desired limits
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let min = scope.minAzimuthAngle
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let max = scope.maxAzimuthAngle
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if (isFinite(min) && isFinite(max)) {
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if (min < -Math.PI) min += twoPI; else if (min > Math.PI) min -= twoPI
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if (max < -Math.PI) max += twoPI; else if (max > Math.PI) max -= twoPI
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if (min <= max) {
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spherical.theta = Math.max(min, Math.min(max, spherical.theta))
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} else {
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spherical.theta = (spherical.theta > (min + max) / 2)
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? Math.max(min, spherical.theta)
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: Math.min(max, spherical.theta)
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}
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}
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// restrict phi to be between desired limits
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spherical.phi = Math.max(scope.minPolarAngle, Math.min(scope.maxPolarAngle, spherical.phi))
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spherical.makeSafe()
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// move target to panned location
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if (scope.enableDamping === true) {
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scope.target.addScaledVector(panOffset, scope.dampingFactor)
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} else {
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scope.target.add(panOffset)
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}
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// Limit the target distance from the cursor to create a sphere around the center of interest
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scope.target.sub(scope.cursor)
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scope.target.clampLength(scope.minTargetRadius, scope.maxTargetRadius)
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scope.target.add(scope.cursor)
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let zoomChanged = false
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// adjust the camera position based on zoom only if we're not zooming to the cursor or if it's an ortho camera
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// we adjust zoom later in these cases
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if ((scope.zoomToCursor && performCursorZoom) || scope.object.isOrthographicCamera) {
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spherical.radius = clampDistance(spherical.radius)
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} else {
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const prevRadius = spherical.radius
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spherical.radius = clampDistance(spherical.radius * scale)
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zoomChanged = prevRadius !== spherical.radius
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}
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offset.setFromSpherical(spherical)
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// rotate offset back to "camera-up-vector-is-up" space
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offset.applyQuaternion(quatInverse)
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position.copy(scope.target).add(offset)
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scope.object.lookAt(scope.target)
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if (scope.enableDamping === true) {
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sphericalDelta.theta *= (1 - scope.dampingFactor)
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sphericalDelta.phi *= (1 - scope.dampingFactor)
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panOffset.multiplyScalar(1 - scope.dampingFactor)
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} else {
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sphericalDelta.set(0, 0, 0)
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panOffset.set(0, 0, 0)
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}
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// adjust camera position
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if (scope.zoomToCursor && performCursorZoom) {
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let newRadius = null
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if (scope.object.isPerspectiveCamera) {
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// move the camera down the pointer ray
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// this method avoids floating point error
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const prevRadius = offset.length()
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newRadius = clampDistance(prevRadius * scale)
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const radiusDelta = prevRadius - newRadius
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scope.object.position.addScaledVector(dollyDirection, radiusDelta)
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scope.object.updateMatrixWorld()
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zoomChanged = !!radiusDelta
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} else if (scope.object.isOrthographicCamera) {
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// adjust the ortho camera position based on zoom changes
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const mouseBefore = new Vector3(mouse.x, mouse.y, 0)
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mouseBefore.unproject(scope.object)
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const prevZoom = scope.object.zoom
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scope.object.zoom = Math.max(scope.minZoom, Math.min(scope.maxZoom, scope.object.zoom / scale))
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scope.object.updateProjectionMatrix()
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zoomChanged = prevZoom !== scope.object.zoom
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const mouseAfter = new Vector3(mouse.x, mouse.y, 0)
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mouseAfter.unproject(scope.object)
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scope.object.position.sub(mouseAfter).add(mouseBefore)
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scope.object.updateMatrixWorld()
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newRadius = offset.length()
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} else {
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console.warn('WARNING: OrbitControls.js encountered an unknown camera type - zoom to cursor disabled.')
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scope.zoomToCursor = false
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}
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// handle the placement of the target
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if (newRadius !== null) {
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if (this.screenSpacePanning) {
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// position the orbit target in front of the new camera position
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scope.target.set(0, 0, -1)
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.transformDirection(scope.object.matrix)
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.multiplyScalar(newRadius)
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.add(scope.object.position)
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} else {
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// get the ray and translation plane to compute target
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_ray.origin.copy(scope.object.position)
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_ray.direction.set(0, 0, -1).transformDirection(scope.object.matrix)
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// if the camera is 20 degrees above the horizon then don't adjust the focus target to avoid
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// extremely large values
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if (Math.abs(scope.object.up.dot(_ray.direction)) < TILT_LIMIT) {
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object.lookAt(scope.target)
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} else {
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_plane.setFromNormalAndCoplanarPoint(scope.object.up, scope.target)
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_ray.intersectPlane(_plane, scope.target)
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}
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}
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}
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} else if (scope.object.isOrthographicCamera) {
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const prevZoom = scope.object.zoom
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scope.object.zoom = Math.max(scope.minZoom, Math.min(scope.maxZoom, scope.object.zoom / scale))
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if (prevZoom !== scope.object.zoom) {
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scope.object.updateProjectionMatrix()
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zoomChanged = true
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}
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}
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scale = 1
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performCursorZoom = false
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// update condition is:
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// min(camera displacement, camera rotation in radians)^2 > EPS
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// using small-angle approximation cos(x/2) = 1 - x^2 / 8
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if (zoomChanged ||
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lastPosition.distanceToSquared(scope.object.position) > EPS ||
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8 * (1 - lastQuaternion.dot(scope.object.quaternion)) > EPS ||
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lastTargetPosition.distanceToSquared(scope.target) > EPS) {
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scope.dispatchEvent(_changeEvent)
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lastPosition.copy(scope.object.position)
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lastQuaternion.copy(scope.object.quaternion)
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lastTargetPosition.copy(scope.target)
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return true
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}
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return false
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}
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}())
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this.dispose = function () {
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scope.domElement.removeEventListener('contextmenu', onContextMenu)
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scope.domElement.removeEventListener('pointerdown', onPointerDown)
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scope.domElement.removeEventListener('pointercancel', onPointerUp)
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scope.domElement.removeEventListener('wheel', onMouseWheel)
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scope.domElement.removeEventListener('pointermove', onPointerMove)
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scope.domElement.removeEventListener('pointerup', onPointerUp)
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const document = scope.domElement.getRootNode() // offscreen canvas compatibility
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document.removeEventListener('keydown', interceptControlDown, { capture: true })
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if (scope._domElementKeyEvents !== null) {
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scope._domElementKeyEvents.removeEventListener('keydown', onKeyDown)
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scope._domElementKeyEvents = null
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}
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// scope.dispatchEvent( { type: 'dispose' } ); // should this be added here?
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}
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//
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// internals
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//
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const scope = this
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const STATE = {
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NONE: -1,
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ROTATE: 0,
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DOLLY: 1,
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PAN: 2,
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TOUCH_ROTATE: 3,
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TOUCH_PAN: 4,
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TOUCH_DOLLY_PAN: 5,
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TOUCH_DOLLY_ROTATE: 6
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}
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let state = STATE.NONE
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const EPS = 0.000001
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// current position in spherical coordinates
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const spherical = new Spherical()
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const sphericalDelta = new Spherical()
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let scale = 1
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const panOffset = new Vector3()
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const rotateStart = new Vector2()
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const rotateEnd = new Vector2()
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const rotateDelta = new Vector2()
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const panStart = new Vector2()
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const panEnd = new Vector2()
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const panDelta = new Vector2()
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const dollyStart = new Vector2()
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const dollyEnd = new Vector2()
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const dollyDelta = new Vector2()
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const dollyDirection = new Vector3()
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const mouse = new Vector2()
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let performCursorZoom = false
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const pointers = []
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const pointerPositions = {}
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let controlActive = false
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function getAutoRotationAngle (deltaTime) {
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if (deltaTime !== null) {
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return (2 * Math.PI / 60 * scope.autoRotateSpeed) * deltaTime
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} else {
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return 2 * Math.PI / 60 / 60 * scope.autoRotateSpeed
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}
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}
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function getZoomScale (delta) {
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const normalizedDelta = Math.abs(delta * 0.01)
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return Math.pow(0.95, scope.zoomSpeed * normalizedDelta)
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}
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function rotateLeft (angle) {
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sphericalDelta.theta -= angle
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}
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function rotateUp (angle) {
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sphericalDelta.phi -= angle
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}
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const panLeft = (function () {
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const v = new Vector3()
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return function panLeft (distance, objectMatrix) {
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v.setFromMatrixColumn(objectMatrix, 0) // get X column of objectMatrix
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v.multiplyScalar(-distance)
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panOffset.add(v)
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}
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}())
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const panUp = (function () {
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const v = new Vector3()
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return function panUp (distance, objectMatrix) {
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if (scope.screenSpacePanning === true) {
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v.setFromMatrixColumn(objectMatrix, 1)
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} else {
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v.setFromMatrixColumn(objectMatrix, 0)
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v.crossVectors(scope.object.up, v)
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}
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v.multiplyScalar(distance)
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panOffset.add(v)
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}
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}())
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// deltaX and deltaY are in pixels; right and down are positive
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const pan = (function () {
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const offset = new Vector3()
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return function pan (deltaX, deltaY) {
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const element = scope.domElement
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if (scope.object.isPerspectiveCamera) {
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// perspective
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const position = scope.object.position
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offset.copy(position).sub(scope.target)
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let targetDistance = offset.length()
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// half of the fov is center to top of screen
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targetDistance *= Math.tan((scope.object.fov / 2) * Math.PI / 180.0)
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// we use only clientHeight here so aspect ratio does not distort speed
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panLeft(2 * deltaX * targetDistance / element.clientHeight, scope.object.matrix)
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panUp(2 * deltaY * targetDistance / element.clientHeight, scope.object.matrix)
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} else if (scope.object.isOrthographicCamera) {
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// orthographic
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panLeft(deltaX * (scope.object.right - scope.object.left) / scope.object.zoom / element.clientWidth, scope.object.matrix)
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panUp(deltaY * (scope.object.top - scope.object.bottom) / scope.object.zoom / element.clientHeight, scope.object.matrix)
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} else {
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// camera neither orthographic nor perspective
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console.warn('WARNING: OrbitControls.js encountered an unknown camera type - pan disabled.')
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scope.enablePan = false
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}
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}
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}())
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function dollyOut (dollyScale) {
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if (scope.object.isPerspectiveCamera || scope.object.isOrthographicCamera) {
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scale /= dollyScale
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} else {
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console.warn('WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.')
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scope.enableZoom = false
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}
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}
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function dollyIn (dollyScale) {
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if (scope.object.isPerspectiveCamera || scope.object.isOrthographicCamera) {
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scale *= dollyScale
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} else {
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console.warn('WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.')
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scope.enableZoom = false
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}
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}
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function updateZoomParameters (x, y) {
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if (!scope.zoomToCursor) {
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return
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}
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performCursorZoom = true
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const rect = scope.domElement.getBoundingClientRect()
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const dx = x - rect.left
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const dy = y - rect.top
|
|
const w = rect.width
|
|
const h = rect.height
|
|
|
|
mouse.x = (dx / w) * 2 - 1
|
|
mouse.y = -(dy / h) * 2 + 1
|
|
|
|
dollyDirection.set(mouse.x, mouse.y, 1).unproject(scope.object).sub(scope.object.position).normalize()
|
|
}
|
|
|
|
function clampDistance (dist) {
|
|
return Math.max(scope.minDistance, Math.min(scope.maxDistance, dist))
|
|
}
|
|
|
|
//
|
|
// event callbacks - update the object state
|
|
//
|
|
|
|
function handleMouseDownRotate (event) {
|
|
rotateStart.set(event.clientX, event.clientY)
|
|
}
|
|
|
|
function handleMouseDownDolly (event) {
|
|
updateZoomParameters(event.clientX, event.clientX)
|
|
dollyStart.set(event.clientX, event.clientY)
|
|
}
|
|
|
|
function handleMouseDownPan (event) {
|
|
panStart.set(event.clientX, event.clientY)
|
|
}
|
|
|
|
function handleMouseMoveRotate (event) {
|
|
rotateEnd.set(event.clientX, event.clientY)
|
|
|
|
rotateDelta.subVectors(rotateEnd, rotateStart).multiplyScalar(scope.rotateSpeed)
|
|
|
|
const element = scope.domElement
|
|
|
|
rotateLeft(2 * Math.PI * rotateDelta.x / element.clientHeight) // yes, height
|
|
|
|
rotateUp(2 * Math.PI * rotateDelta.y / element.clientHeight)
|
|
|
|
rotateStart.copy(rotateEnd)
|
|
|
|
scope.update()
|
|
}
|
|
|
|
function handleMouseMoveDolly (event) {
|
|
dollyEnd.set(event.clientX, event.clientY)
|
|
|
|
dollyDelta.subVectors(dollyEnd, dollyStart)
|
|
|
|
if (dollyDelta.y > 0) {
|
|
dollyOut(getZoomScale(dollyDelta.y))
|
|
} else if (dollyDelta.y < 0) {
|
|
dollyIn(getZoomScale(dollyDelta.y))
|
|
}
|
|
|
|
dollyStart.copy(dollyEnd)
|
|
|
|
scope.update()
|
|
}
|
|
|
|
function handleMouseMovePan (event) {
|
|
panEnd.set(event.clientX, event.clientY)
|
|
|
|
panDelta.subVectors(panEnd, panStart).multiplyScalar(scope.panSpeed)
|
|
|
|
pan(panDelta.x, panDelta.y)
|
|
|
|
panStart.copy(panEnd)
|
|
|
|
scope.update()
|
|
}
|
|
|
|
function handleMouseWheel (event) {
|
|
updateZoomParameters(event.clientX, event.clientY)
|
|
|
|
if (event.deltaY < 0) {
|
|
dollyIn(getZoomScale(event.deltaY))
|
|
} else if (event.deltaY > 0) {
|
|
dollyOut(getZoomScale(event.deltaY))
|
|
}
|
|
|
|
scope.update()
|
|
}
|
|
|
|
function handleKeyDown (event) {
|
|
let needsUpdate = false
|
|
|
|
switch (event.code) {
|
|
case scope.keys.UP:
|
|
|
|
if (scope.enablePan && (event.ctrlKey || event.metaKey || event.shiftKey)) {
|
|
pan(0, scope.keyPanSpeed)
|
|
} else {
|
|
rotateUp(-2 * Math.PI * scope.keyRotateFactor * scope.rotateSpeed / scope.domElement.clientHeight)
|
|
}
|
|
|
|
needsUpdate = true
|
|
break
|
|
|
|
case scope.keys.BOTTOM:
|
|
|
|
if (scope.enablePan && (event.ctrlKey || event.metaKey || event.shiftKey)) {
|
|
pan(0, -scope.keyPanSpeed)
|
|
} else {
|
|
rotateUp(2 * Math.PI * scope.keyRotateFactor * scope.rotateSpeed / scope.domElement.clientHeight)
|
|
}
|
|
|
|
needsUpdate = true
|
|
break
|
|
|
|
case scope.keys.LEFT:
|
|
|
|
if (scope.enablePan && (event.ctrlKey || event.metaKey || event.shiftKey)) {
|
|
pan(scope.keyPanSpeed, 0)
|
|
} else {
|
|
rotateLeft(-2 * Math.PI * scope.keyRotateFactor * scope.rotateSpeed / scope.domElement.clientHeight)
|
|
}
|
|
|
|
needsUpdate = true
|
|
break
|
|
|
|
case scope.keys.RIGHT:
|
|
|
|
if (scope.enablePan && (event.ctrlKey || event.metaKey || event.shiftKey)) {
|
|
pan(-scope.keyPanSpeed, 0)
|
|
} else {
|
|
rotateLeft(2 * Math.PI * scope.keyRotateFactor * scope.rotateSpeed / scope.domElement.clientHeight)
|
|
}
|
|
|
|
needsUpdate = true
|
|
break
|
|
|
|
case scope.keys.IN:
|
|
if (scope.enableZoom) {
|
|
dollyIn(getZoomScale(scope.keyZoomSpeed))
|
|
needsUpdate = true
|
|
}
|
|
break
|
|
|
|
case scope.keys.OUT:
|
|
if (scope.enableZoom) {
|
|
dollyOut(getZoomScale(scope.keyZoomSpeed))
|
|
needsUpdate = true
|
|
}
|
|
break
|
|
}
|
|
|
|
if (needsUpdate) {
|
|
// prevent the browser from scrolling on cursor keys
|
|
event.preventDefault()
|
|
|
|
scope.update()
|
|
}
|
|
}
|
|
|
|
function handleTouchStartRotate (event) {
|
|
if (pointers.length === 1) {
|
|
rotateStart.set(event.pageX, event.pageY)
|
|
} else {
|
|
const position = getSecondPointerPosition(event)
|
|
|
|
const x = 0.5 * (event.pageX + position.x)
|
|
const y = 0.5 * (event.pageY + position.y)
|
|
|
|
rotateStart.set(x, y)
|
|
}
|
|
}
|
|
|
|
function handleTouchStartPan (event) {
|
|
if (pointers.length === 1) {
|
|
panStart.set(event.pageX, event.pageY)
|
|
} else {
|
|
const position = getSecondPointerPosition(event)
|
|
|
|
const x = 0.5 * (event.pageX + position.x)
|
|
const y = 0.5 * (event.pageY + position.y)
|
|
|
|
panStart.set(x, y)
|
|
}
|
|
}
|
|
|
|
function handleTouchStartDolly (event) {
|
|
const position = getSecondPointerPosition(event)
|
|
|
|
const dx = event.pageX - position.x
|
|
const dy = event.pageY - position.y
|
|
|
|
const distance = Math.sqrt(dx * dx + dy * dy)
|
|
|
|
dollyStart.set(0, distance)
|
|
}
|
|
|
|
function handleTouchStartDollyPan (event) {
|
|
if (scope.enableZoom) handleTouchStartDolly(event)
|
|
|
|
if (scope.enablePan) handleTouchStartPan(event)
|
|
}
|
|
|
|
function handleTouchStartDollyRotate (event) {
|
|
if (scope.enableZoom) handleTouchStartDolly(event)
|
|
|
|
if (scope.enableRotate) handleTouchStartRotate(event)
|
|
}
|
|
|
|
function handleTouchMoveRotate (event) {
|
|
if (pointers.length === 1) {
|
|
rotateEnd.set(event.pageX, event.pageY)
|
|
} else {
|
|
const position = getSecondPointerPosition(event)
|
|
|
|
const x = 0.5 * (event.pageX + position.x)
|
|
const y = 0.5 * (event.pageY + position.y)
|
|
|
|
rotateEnd.set(x, y)
|
|
}
|
|
|
|
rotateDelta.subVectors(rotateEnd, rotateStart).multiplyScalar(scope.rotateSpeed)
|
|
|
|
const element = scope.domElement
|
|
|
|
rotateLeft(2 * Math.PI * rotateDelta.x / element.clientHeight) // yes, height
|
|
|
|
rotateUp(2 * Math.PI * rotateDelta.y / element.clientHeight)
|
|
|
|
rotateStart.copy(rotateEnd)
|
|
}
|
|
|
|
function handleTouchMovePan (event) {
|
|
if (pointers.length === 1) {
|
|
panEnd.set(event.pageX, event.pageY)
|
|
} else {
|
|
const position = getSecondPointerPosition(event)
|
|
|
|
const x = 0.5 * (event.pageX + position.x)
|
|
const y = 0.5 * (event.pageY + position.y)
|
|
|
|
panEnd.set(x, y)
|
|
}
|
|
|
|
panDelta.subVectors(panEnd, panStart).multiplyScalar(scope.panSpeed)
|
|
|
|
pan(panDelta.x, panDelta.y)
|
|
|
|
panStart.copy(panEnd)
|
|
}
|
|
|
|
function handleTouchMoveDolly (event) {
|
|
const position = getSecondPointerPosition(event)
|
|
|
|
const dx = event.pageX - position.x
|
|
const dy = event.pageY - position.y
|
|
|
|
const distance = Math.sqrt(dx * dx + dy * dy)
|
|
|
|
dollyEnd.set(0, distance)
|
|
|
|
dollyDelta.set(0, Math.pow(dollyEnd.y / dollyStart.y, scope.zoomSpeed))
|
|
|
|
dollyOut(dollyDelta.y)
|
|
|
|
dollyStart.copy(dollyEnd)
|
|
|
|
const centerX = (event.pageX + position.x) * 0.5
|
|
const centerY = (event.pageY + position.y) * 0.5
|
|
|
|
updateZoomParameters(centerX, centerY)
|
|
}
|
|
|
|
function handleTouchMoveDollyPan (event) {
|
|
if (scope.enableZoom) handleTouchMoveDolly(event)
|
|
|
|
if (scope.enablePan) handleTouchMovePan(event)
|
|
}
|
|
|
|
function handleTouchMoveDollyRotate (event) {
|
|
if (scope.enableZoom) handleTouchMoveDolly(event)
|
|
|
|
if (scope.enableRotate) handleTouchMoveRotate(event)
|
|
}
|
|
|
|
//
|
|
// event handlers - FSM: listen for events and reset state
|
|
//
|
|
|
|
function onPointerDown (event) {
|
|
if (scope.enabled === false) return
|
|
|
|
if (pointers.length === 0) {
|
|
scope.domElement.setPointerCapture(event.pointerId)
|
|
|
|
scope.domElement.addEventListener('pointermove', onPointerMove)
|
|
scope.domElement.addEventListener('pointerup', onPointerUp)
|
|
}
|
|
|
|
//
|
|
|
|
if (isTrackingPointer(event)) return
|
|
|
|
//
|
|
|
|
addPointer(event)
|
|
|
|
if (event.pointerType === 'touch') {
|
|
onTouchStart(event)
|
|
} else {
|
|
onMouseDown(event)
|
|
}
|
|
}
|
|
|
|
function onPointerMove (event) {
|
|
if (scope.enabled === false) return
|
|
|
|
if (event.pointerType === 'touch') {
|
|
onTouchMove(event)
|
|
} else {
|
|
onMouseMove(event)
|
|
}
|
|
}
|
|
|
|
function onPointerUp (event) {
|
|
removePointer(event)
|
|
|
|
let pointerId = null
|
|
let position = null
|
|
|
|
switch (pointers.length) {
|
|
case 0:
|
|
|
|
scope.domElement.releasePointerCapture(event.pointerId)
|
|
|
|
scope.domElement.removeEventListener('pointermove', onPointerMove)
|
|
scope.domElement.removeEventListener('pointerup', onPointerUp)
|
|
|
|
scope.dispatchEvent(_endEvent)
|
|
|
|
state = STATE.NONE
|
|
|
|
break
|
|
|
|
case 1:
|
|
pointerId = pointers[0]
|
|
position = pointerPositions[pointerId]
|
|
|
|
// minimal placeholder event - allows state correction on pointer-up
|
|
onTouchStart({ pointerId, pageX: position.x, pageY: position.y })
|
|
|
|
break
|
|
}
|
|
}
|
|
|
|
function onMouseDown (event) {
|
|
let mouseAction
|
|
|
|
switch (event.button) {
|
|
case 0:
|
|
|
|
mouseAction = scope.mouseButtons.LEFT
|
|
break
|
|
|
|
case 1:
|
|
|
|
mouseAction = scope.mouseButtons.MIDDLE
|
|
break
|
|
|
|
case 2:
|
|
|
|
mouseAction = scope.mouseButtons.RIGHT
|
|
break
|
|
|
|
default:
|
|
|
|
mouseAction = -1
|
|
}
|
|
|
|
switch (mouseAction) {
|
|
case MOUSE.DOLLY:
|
|
|
|
if (scope.enableZoom === false) return
|
|
|
|
handleMouseDownDolly(event)
|
|
|
|
state = STATE.DOLLY
|
|
|
|
break
|
|
|
|
case MOUSE.ROTATE:
|
|
|
|
if (event.ctrlKey || event.metaKey || event.shiftKey) {
|
|
if (scope.enablePan === false) return
|
|
|
|
handleMouseDownPan(event)
|
|
|
|
state = STATE.PAN
|
|
} else {
|
|
if (scope.enableRotate === false) return
|
|
|
|
handleMouseDownRotate(event)
|
|
|
|
state = STATE.ROTATE
|
|
}
|
|
|
|
break
|
|
|
|
case MOUSE.PAN:
|
|
|
|
if (event.ctrlKey || event.metaKey || event.shiftKey) {
|
|
if (scope.enableRotate === false) return
|
|
|
|
handleMouseDownRotate(event)
|
|
|
|
state = STATE.ROTATE
|
|
} else {
|
|
if (scope.enablePan === false) return
|
|
|
|
handleMouseDownPan(event)
|
|
|
|
state = STATE.PAN
|
|
}
|
|
|
|
break
|
|
|
|
default:
|
|
|
|
state = STATE.NONE
|
|
}
|
|
|
|
if (state !== STATE.NONE) {
|
|
scope.dispatchEvent(_startEvent)
|
|
}
|
|
}
|
|
|
|
function onMouseMove (event) {
|
|
switch (state) {
|
|
case STATE.ROTATE:
|
|
|
|
if (scope.enableRotate === false) return
|
|
|
|
handleMouseMoveRotate(event)
|
|
|
|
break
|
|
|
|
case STATE.DOLLY:
|
|
|
|
if (scope.enableZoom === false) return
|
|
|
|
handleMouseMoveDolly(event)
|
|
|
|
break
|
|
|
|
case STATE.PAN:
|
|
|
|
if (scope.enablePan === false) return
|
|
|
|
handleMouseMovePan(event)
|
|
|
|
break
|
|
}
|
|
}
|
|
|
|
function onMouseWheel (event) {
|
|
if (scope.enabled === false || scope.enableZoom === false || state !== STATE.NONE) return
|
|
|
|
event.preventDefault()
|
|
|
|
scope.dispatchEvent(_startEvent)
|
|
|
|
handleMouseWheel(customWheelEvent(event))
|
|
|
|
scope.dispatchEvent(_endEvent)
|
|
}
|
|
|
|
function customWheelEvent (event) {
|
|
const mode = event.deltaMode
|
|
|
|
// minimal wheel event altered to meet delta-zoom demand
|
|
const newEvent = {
|
|
clientX: event.clientX,
|
|
clientY: event.clientY,
|
|
deltaY: event.deltaY
|
|
}
|
|
|
|
switch (mode) {
|
|
case 1: // LINE_MODE
|
|
newEvent.deltaY *= 16
|
|
break
|
|
|
|
case 2: // PAGE_MODE
|
|
newEvent.deltaY *= 100
|
|
break
|
|
}
|
|
|
|
// detect if event was triggered by pinching
|
|
if (event.ctrlKey && !controlActive) {
|
|
newEvent.deltaY *= 10
|
|
}
|
|
|
|
return newEvent
|
|
}
|
|
|
|
function interceptControlDown (event) {
|
|
if (event.key === 'Control') {
|
|
controlActive = true
|
|
|
|
const document = scope.domElement.getRootNode() // offscreen canvas compatibility
|
|
|
|
document.addEventListener('keyup', interceptControlUp, { passive: true, capture: true })
|
|
}
|
|
}
|
|
|
|
function interceptControlUp (event) {
|
|
if (event.key === 'Control') {
|
|
controlActive = false
|
|
|
|
const document = scope.domElement.getRootNode() // offscreen canvas compatibility
|
|
|
|
document.removeEventListener('keyup', interceptControlUp, { passive: true, capture: true })
|
|
}
|
|
}
|
|
|
|
function onKeyDown (event) {
|
|
if (scope.enabled === false) return
|
|
|
|
handleKeyDown(event)
|
|
}
|
|
|
|
function onTouchStart (event) {
|
|
trackPointer(event)
|
|
|
|
switch (pointers.length) {
|
|
case 1:
|
|
|
|
switch (scope.touches.ONE) {
|
|
case TOUCH.ROTATE:
|
|
|
|
if (scope.enableRotate === false) return
|
|
|
|
handleTouchStartRotate(event)
|
|
|
|
state = STATE.TOUCH_ROTATE
|
|
|
|
break
|
|
|
|
case TOUCH.PAN:
|
|
|
|
if (scope.enablePan === false) return
|
|
|
|
handleTouchStartPan(event)
|
|
|
|
state = STATE.TOUCH_PAN
|
|
|
|
break
|
|
|
|
default:
|
|
|
|
state = STATE.NONE
|
|
}
|
|
|
|
break
|
|
|
|
case 2:
|
|
|
|
switch (scope.touches.TWO) {
|
|
case TOUCH.DOLLY_PAN:
|
|
|
|
if (scope.enableZoom === false && scope.enablePan === false) return
|
|
|
|
handleTouchStartDollyPan(event)
|
|
|
|
state = STATE.TOUCH_DOLLY_PAN
|
|
|
|
break
|
|
|
|
case TOUCH.DOLLY_ROTATE:
|
|
|
|
if (scope.enableZoom === false && scope.enableRotate === false) return
|
|
|
|
handleTouchStartDollyRotate(event)
|
|
|
|
state = STATE.TOUCH_DOLLY_ROTATE
|
|
|
|
break
|
|
|
|
default:
|
|
|
|
state = STATE.NONE
|
|
}
|
|
|
|
break
|
|
|
|
default:
|
|
|
|
state = STATE.NONE
|
|
}
|
|
|
|
if (state !== STATE.NONE) {
|
|
scope.dispatchEvent(_startEvent)
|
|
}
|
|
}
|
|
|
|
function onTouchMove (event) {
|
|
trackPointer(event)
|
|
|
|
switch (state) {
|
|
case STATE.TOUCH_ROTATE:
|
|
|
|
if (scope.enableRotate === false) return
|
|
|
|
handleTouchMoveRotate(event)
|
|
|
|
scope.update()
|
|
|
|
break
|
|
|
|
case STATE.TOUCH_PAN:
|
|
|
|
if (scope.enablePan === false) return
|
|
|
|
handleTouchMovePan(event)
|
|
|
|
scope.update()
|
|
|
|
break
|
|
|
|
case STATE.TOUCH_DOLLY_PAN:
|
|
|
|
if (scope.enableZoom === false && scope.enablePan === false) return
|
|
|
|
handleTouchMoveDollyPan(event)
|
|
|
|
scope.update()
|
|
|
|
break
|
|
|
|
case STATE.TOUCH_DOLLY_ROTATE:
|
|
|
|
if (scope.enableZoom === false && scope.enableRotate === false) return
|
|
|
|
handleTouchMoveDollyRotate(event)
|
|
|
|
scope.update()
|
|
|
|
break
|
|
|
|
default:
|
|
|
|
state = STATE.NONE
|
|
}
|
|
}
|
|
|
|
function onContextMenu (event) {
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if (scope.enabled === false) return
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|
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event.preventDefault()
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}
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function addPointer (event) {
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pointers.push(event.pointerId)
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}
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|
|
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function removePointer (event) {
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|
delete pointerPositions[event.pointerId]
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|
|
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for (let i = 0; i < pointers.length; i++) {
|
|
if (pointers[i] === event.pointerId) {
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|
pointers.splice(i, 1)
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|
return
|
|
}
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|
}
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|
}
|
|
|
|
function isTrackingPointer (event) {
|
|
for (let i = 0; i < pointers.length; i++) {
|
|
if (pointers[i] === event.pointerId) return true
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
function trackPointer (event) {
|
|
let position = pointerPositions[event.pointerId]
|
|
|
|
if (position === undefined) {
|
|
position = new Vector2()
|
|
pointerPositions[event.pointerId] = position
|
|
}
|
|
|
|
position.set(event.pageX, event.pageY)
|
|
}
|
|
|
|
function getSecondPointerPosition (event) {
|
|
const pointerId = (event.pointerId === pointers[0]) ? pointers[1] : pointers[0]
|
|
|
|
return pointerPositions[pointerId]
|
|
}
|
|
|
|
//
|
|
|
|
scope.domElement.addEventListener('contextmenu', onContextMenu)
|
|
|
|
scope.domElement.addEventListener('pointerdown', onPointerDown)
|
|
scope.domElement.addEventListener('pointercancel', onPointerUp)
|
|
scope.domElement.addEventListener('wheel', onMouseWheel, { passive: false })
|
|
|
|
const document = scope.domElement.getRootNode() // offscreen canvas compatibility
|
|
|
|
document.addEventListener('keydown', interceptControlDown, { passive: true, capture: true })
|
|
|
|
// force an update at start
|
|
|
|
this.update()
|
|
}
|
|
}
|
|
|
|
export { OrbitControls }
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