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OrbitControls.js
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OrbitControls.js
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/**
* @author qiao / https://github.com/qiao
* @author mrdoob / http://mrdoob.com
* @author alteredq / http://alteredqualia.com/
* @author WestLangley / http://github.com/WestLangley
* @author erich666 / http://erichaines.com
*/
// This set of controls performs orbiting, dollying (zooming), and panning.
// Unlike TrackballControls, it maintains the "up" direction object.up (+Y by default).
//
// Orbit - left mouse / touch: one-finger move
// Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
// Pan - right mouse, or arrow keys / touch: two-finger move
THREE.OrbitControls = function (object, domElement) {
// object:指定相机对象,比如多个相机对象(场景相机对象、UI相机对象),只有一个起作用
this.object = object;
// domElement:指定鼠标事件起作用的范围,默认是整个document,所有html元素
// 比如3D建模软件,可以把范围指定为renderer.domElement,渲染器引用render的domElement属性引用指向绘图区canvas
this.domElement = domElement !== undefined ? domElement : document;
// Set to false to disable this control
// 设置为false以禁用此控件
this.enabled = true;
// "target" sets the location of focus, where the object orbits around
// "target"设置对象绕过的焦点位置
// 与lookAt相关:.lookAt( scope.target ); 视角绕着谁旋转
// 平移之后,旋转中心仍然是默认的原点,是否可以以鼠标为中心
// 缩放的中心也是原点 能不能也改成以鼠标为中心
// 任何时候都以鼠标为中心进行旋转、缩放、平移
this.target = new THREE.Vector3();
// How far you can dolly in and out ( PerspectiveCamera only )
// 您可以进出多远(仅限PerspectiveCamera)
this.minDistance = 0;
this.maxDistance = Infinity;
// How far you can zoom in and out ( OrthographicCamera only )
// 您可以放大或缩小多少(仅限OrthographicCamera)
// 相对你原来设置相机视觉效果 设置缩放倍数
// 比如商品展示 0.5~2之间
this.minZoom = 0;
this.maxZoom = Infinity;
// How far you can orbit vertically, upper and lower limits.
// Range is 0 to Math.PI radians.
//你可以垂直绕行多远,上限和下限。
//范围从0到Math.PI弧度。
// 上下旋转范围
this.minPolarAngle = 0; // radians
this.maxPolarAngle = Math.PI; // radians
// How far you can orbit horizontally, upper and lower limits.
// If set, must be a sub-interval of the interval [ - Math.PI, Math.PI ].
//你可以绕水平方向运行多远,上限和下限。
//如果设置,则必须是区间[ - Math.PI,Math.PI]的子区间。
// 左右旋转范围
this.minAzimuthAngle = -Infinity; // radians
this.maxAzimuthAngle = Infinity; // radians
// Set to true to enable damping (inertia)
// If damping is enabled, you must call controls.update() in your animation loop
//设置为true以启用阻尼(惯性)
//如果启用阻尼,则必须在动画循环中调用controls.update()
this.enableDamping = false;
this.dampingFactor = 0.25;
// This option actually enables dollying in and out; left as "zoom" for backwards compatibility.
// Set to false to disable zooming
//这个选项实际上可以使进出进入; 为了向后兼容,保留为“缩放”。
//设置为false以禁用缩放
this.enableZoom = true;
this.zoomSpeed = 1.0;
// Set to false to disable rotating
//设置为false以禁用旋转
this.enableRotate = true;
this.rotateSpeed = 1.0;
// Set to false to disable panning平移
this.enablePan = true;
this.panSpeed = 1.0;
// 如果为true,则在屏幕空间中平移
this.screenSpacePanning = false; // if true, pan in screen-space
this.keyPanSpeed = 7.0; // pixels moved per arrow key push 像素按箭头键移动
// Set to true to automatically rotate around the target
// If auto-rotate is enabled, you must call controls.update() in your animation loop
//设置为true以自动围绕目标旋转
//如果启用自动旋转,则必须在动画循环中调用controls.update()
this.autoRotate = false;
// 当fps是60时,每轮30秒
this.autoRotateSpeed = 2.0; // 30 seconds per round when fps is 60
// Set to false to disable use of the keys禁用键使用
this.enableKeys = true;
// The four arrow keys 四个箭头键
this.keys = { LEFT: 37, UP: 38, RIGHT: 39, BOTTOM: 40 };
// Mouse buttons
// orbit:轨道 ZOOM:放大 pan对应平移
// 给特定的键命名
this.mouseButtons = {
ORBIT: THREE.MOUSE.LEFT,
ZOOM: THREE.MOUSE.MIDDLE,
PAN: THREE.MOUSE.RIGHT,
};
// for reset 用于复位、重置
this.target0 = this.target.clone();
this.position0 = this.object.position.clone();
this.zoom0 = this.object.zoom;
//
// public methods
//
// getPolarAngle获得极化角 Polar:极地的
this.getPolarAngle = function () {
// phi:表示希腊文的第21个字母,角度φ
// spherical:球形的
return spherical.phi;
};
// Azimuthal:方位角
this.getAzimuthalAngle = function () {
return spherical.theta;
};
// 记录目标点、相机位置、相机缩放状态
this.saveState = function () {
scope.target0.copy(scope.target);
scope.position0.copy(scope.object.position);
scope.zoom0 = scope.object.zoom;
};
// 重置
this.reset = function () {
scope.target.copy(scope.target0);
scope.object.position.copy(scope.position0);
scope.object.zoom = scope.zoom0;
scope.object.updateProjectionMatrix();
scope.dispatchEvent(changeEvent);
scope.update();
state = STATE.NONE;
};
// this method is exposed, but perhaps it would be better if we can make it private...
this.update = (function () {
var offset = new THREE.Vector3();
// so camera.up is the orbit axis
var quat = new THREE.Quaternion().setFromUnitVectors(
object.up,
new THREE.Vector3(0, 1, 0)
);
var quatInverse = quat.clone().inverse();
var lastPosition = new THREE.Vector3();
var lastQuaternion = new THREE.Quaternion();
return function update() {
var position = scope.object.position;
offset.copy(position).sub(scope.target);
// rotate offset to "y-axis-is-up" space
offset.applyQuaternion(quat);
// angle from z-axis around y-axis
spherical.setFromVector3(offset);
if (scope.autoRotate && state === STATE.NONE) {
rotateLeft(getAutoRotationAngle());
}
spherical.theta += sphericalDelta.theta;
spherical.phi += sphericalDelta.phi;
// restrict theta to be between desired limits
spherical.theta = Math.max(
scope.minAzimuthAngle,
Math.min(scope.maxAzimuthAngle, spherical.theta)
);
// restrict phi to be between desired limits
spherical.phi = Math.max(
scope.minPolarAngle,
Math.min(scope.maxPolarAngle, spherical.phi)
);
spherical.makeSafe();
spherical.radius *= scale;
// restrict radius to be between desired limits
spherical.radius = Math.max(
scope.minDistance,
Math.min(scope.maxDistance, spherical.radius)
);
// move target to panned location
scope.target.add(panOffset);
offset.setFromSpherical(spherical);
// rotate offset back to "camera-up-vector-is-up" space
offset.applyQuaternion(quatInverse);
position.copy(scope.target).add(offset);
scope.object.lookAt(scope.target);
if (scope.enableDamping === true) {
sphericalDelta.theta *= 1 - scope.dampingFactor;
sphericalDelta.phi *= 1 - scope.dampingFactor;
panOffset.multiplyScalar(1 - scope.dampingFactor);
} else {
sphericalDelta.set(0, 0, 0);
panOffset.set(0, 0, 0);
}
scale = 1;
// update condition is:
// min(camera displacement, camera rotation in radians)^2 > EPS
// using small-angle approximation cos(x/2) = 1 - x^2 / 8
if (
zoomChanged ||
lastPosition.distanceToSquared(scope.object.position) > EPS ||
8 * (1 - lastQuaternion.dot(scope.object.quaternion)) > EPS
) {
scope.dispatchEvent(changeEvent);
lastPosition.copy(scope.object.position);
lastQuaternion.copy(scope.object.quaternion);
zoomChanged = false;
return true;
}
return false;
};
})();
this.dispose = function () {
scope.domElement.removeEventListener("contextmenu", onContextMenu, false);
scope.domElement.removeEventListener("mousedown", onMouseDown, false);
scope.domElement.removeEventListener("wheel", onMouseWheel, false);
scope.domElement.removeEventListener("touchstart", onTouchStart, false);
scope.domElement.removeEventListener("touchend", onTouchEnd, false);
scope.domElement.removeEventListener("touchmove", onTouchMove, false);
document.removeEventListener("mousemove", onMouseMove, false);
document.removeEventListener("mouseup", onMouseUp, false);
window.removeEventListener("keydown", onKeyDown, false);
//scope.dispatchEvent( { type: 'dispose' } ); // should this be added here?
};
//
// internals
//
var scope = this;
var changeEvent = { type: "change" };
var startEvent = { type: "start" };
var endEvent = { type: "end" };
var STATE = {
NONE: -1,
ROTATE: 0,
DOLLY: 1,
PAN: 2,
TOUCH_ROTATE: 3,
TOUCH_DOLLY_PAN: 4,
};
var state = STATE.NONE;
var EPS = 0.000001;
// current position in spherical coordinates
var spherical = new THREE.Spherical();
var sphericalDelta = new THREE.Spherical();
var scale = 1;
var panOffset = new THREE.Vector3();
var zoomChanged = false;
var rotateStart = new THREE.Vector2();
var rotateEnd = new THREE.Vector2();
var rotateDelta = new THREE.Vector2();
var panStart = new THREE.Vector2();
var panEnd = new THREE.Vector2();
var panDelta = new THREE.Vector2();
var dollyStart = new THREE.Vector2();
var dollyEnd = new THREE.Vector2();
var dollyDelta = new THREE.Vector2();
function getAutoRotationAngle() {
return ((2 * Math.PI) / 60 / 60) * scope.autoRotateSpeed;
}
function getZoomScale() {
return Math.pow(0.95, scope.zoomSpeed);
}
function rotateLeft(angle) {
sphericalDelta.theta -= angle;
}
function rotateUp(angle) {
sphericalDelta.phi -= angle;
}
var panLeft = (function () {
var v = new THREE.Vector3();
return function panLeft(distance, objectMatrix) {
v.setFromMatrixColumn(objectMatrix, 0); // get X column of objectMatrix
v.multiplyScalar(-distance);
panOffset.add(v);
};
})();
var panUp = (function () {
var v = new THREE.Vector3();
return function panUp(distance, objectMatrix) {
if (scope.screenSpacePanning === true) {
v.setFromMatrixColumn(objectMatrix, 1);
} else {
v.setFromMatrixColumn(objectMatrix, 0);
v.crossVectors(scope.object.up, v);
}
v.multiplyScalar(distance);
panOffset.add(v);
};
})();
// deltaX and deltaY are in pixels; right and down are positive
var pan = (function () {
var offset = new THREE.Vector3();
return function pan(deltaX, deltaY) {
var element =
scope.domElement === document
? scope.domElement.body
: scope.domElement;
if (scope.object.isPerspectiveCamera) {
// perspective
var position = scope.object.position;
offset.copy(position).sub(scope.target);
var targetDistance = offset.length();
// half of the fov is center to top of screen
targetDistance *= Math.tan(((scope.object.fov / 2) * Math.PI) / 180.0);
// we use only clientHeight here so aspect ratio does not distort speed
panLeft(
(2 * deltaX * targetDistance) / element.clientHeight,
scope.object.matrix
);
panUp(
(2 * deltaY * targetDistance) / element.clientHeight,
scope.object.matrix
);
} else if (scope.object.isOrthographicCamera) {
// orthographic
panLeft(
(deltaX * (scope.object.right - scope.object.left)) /
scope.object.zoom /
element.clientWidth,
scope.object.matrix
);
panUp(
(deltaY * (scope.object.top - scope.object.bottom)) /
scope.object.zoom /
element.clientHeight,
scope.object.matrix
);
} else {
// camera neither orthographic nor perspective
console.warn(
"WARNING: OrbitControls.js encountered an unknown camera type - pan disabled."
);
scope.enablePan = false;
}
};
})();
function dollyIn(dollyScale) {
if (scope.object.isPerspectiveCamera) {
scale /= dollyScale;
} else if (scope.object.isOrthographicCamera) {
scope.object.zoom = Math.max(
scope.minZoom,
Math.min(scope.maxZoom, scope.object.zoom * dollyScale)
);
scope.object.updateProjectionMatrix();
zoomChanged = true;
} else {
console.warn(
"WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled."
);
scope.enableZoom = false;
}
}
function dollyOut(dollyScale) {
if (scope.object.isPerspectiveCamera) {
scale *= dollyScale;
} else if (scope.object.isOrthographicCamera) {
scope.object.zoom = Math.max(
scope.minZoom,
Math.min(scope.maxZoom, scope.object.zoom / dollyScale)
);
scope.object.updateProjectionMatrix();
zoomChanged = true;
} else {
console.warn(
"WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled."
);
scope.enableZoom = false;
}
}
//
// event callbacks - update the object state
//
function handleMouseDownRotate(event) {
//console.log( 'handleMouseDownRotate' );
rotateStart.set(event.clientX, event.clientY);
}
function handleMouseDownDolly(event) {
//console.log( 'handleMouseDownDolly' );
dollyStart.set(event.clientX, event.clientY);
}
function handleMouseDownPan(event) {
//console.log( 'handleMouseDownPan' );
panStart.set(event.clientX, event.clientY);
}
function handleMouseMoveRotate(event) {
//console.log( 'handleMouseMoveRotate' );
rotateEnd.set(event.clientX, event.clientY);
rotateDelta
.subVectors(rotateEnd, rotateStart)
.multiplyScalar(scope.rotateSpeed);
var element =
scope.domElement === document ? scope.domElement.body : scope.domElement;
// rotating across whole screen goes 360 degrees around
rotateLeft((2 * Math.PI * rotateDelta.x) / element.clientWidth);
// rotating up and down along whole screen attempts to go 360, but limited to 180
rotateUp((2 * Math.PI * rotateDelta.y) / element.clientHeight);
rotateStart.copy(rotateEnd);
scope.update();
}
function handleMouseMoveDolly(event) {
//console.log( 'handleMouseMoveDolly' );
dollyEnd.set(event.clientX, event.clientY);
dollyDelta.subVectors(dollyEnd, dollyStart);
if (dollyDelta.y > 0) {
dollyIn(getZoomScale());
} else if (dollyDelta.y < 0) {
dollyOut(getZoomScale());
}
dollyStart.copy(dollyEnd);
scope.update();
}
function handleMouseMovePan(event) {
//console.log( 'handleMouseMovePan' );
panEnd.set(event.clientX, event.clientY);
panDelta.subVectors(panEnd, panStart).multiplyScalar(scope.panSpeed);
pan(panDelta.x, panDelta.y);
panStart.copy(panEnd);
scope.update();
}
function handleMouseUp(event) {
// console.log( 'handleMouseUp' );
}
function handleMouseWheel(event) {
// console.log( 'handleMouseWheel' );
if (event.deltaY < 0) {
dollyOut(getZoomScale());
} else if (event.deltaY > 0) {
dollyIn(getZoomScale());
}
scope.update();
}
function handleKeyDown(event) {
//console.log( 'handleKeyDown' );
switch (event.keyCode) {
case scope.keys.UP:
pan(0, scope.keyPanSpeed);
scope.update();
break;
case scope.keys.BOTTOM:
pan(0, -scope.keyPanSpeed);
scope.update();
break;
case scope.keys.LEFT:
pan(scope.keyPanSpeed, 0);
scope.update();
break;
case scope.keys.RIGHT:
pan(-scope.keyPanSpeed, 0);
scope.update();
break;
}
}
function handleTouchStartRotate(event) {
//console.log( 'handleTouchStartRotate' );
rotateStart.set(event.touches[0].pageX, event.touches[0].pageY);
}
function handleTouchStartDollyPan(event) {
//console.log( 'handleTouchStartDollyPan' );
if (scope.enableZoom) {
var dx = event.touches[0].pageX - event.touches[1].pageX;
var dy = event.touches[0].pageY - event.touches[1].pageY;
var distance = Math.sqrt(dx * dx + dy * dy);
dollyStart.set(0, distance);
}
if (scope.enablePan) {
var x = 0.5 * (event.touches[0].pageX + event.touches[1].pageX);
var y = 0.5 * (event.touches[0].pageY + event.touches[1].pageY);
panStart.set(x, y);
}
}
function handleTouchMoveRotate(event) {
//console.log( 'handleTouchMoveRotate' );
rotateEnd.set(event.touches[0].pageX, event.touches[0].pageY);
rotateDelta
.subVectors(rotateEnd, rotateStart)
.multiplyScalar(scope.rotateSpeed);
var element =
scope.domElement === document ? scope.domElement.body : scope.domElement;
// rotating across whole screen goes 360 degrees around
rotateLeft((2 * Math.PI * rotateDelta.x) / element.clientWidth);
// rotating up and down along whole screen attempts to go 360, but limited to 180
rotateUp((2 * Math.PI * rotateDelta.y) / element.clientHeight);
rotateStart.copy(rotateEnd);
scope.update();
}
function handleTouchMoveDollyPan(event) {
//console.log( 'handleTouchMoveDollyPan' );
if (scope.enableZoom) {
var dx = event.touches[0].pageX - event.touches[1].pageX;
var dy = event.touches[0].pageY - event.touches[1].pageY;
var distance = Math.sqrt(dx * dx + dy * dy);
dollyEnd.set(0, distance);
dollyDelta.set(0, Math.pow(dollyEnd.y / dollyStart.y, scope.zoomSpeed));
dollyIn(dollyDelta.y);
dollyStart.copy(dollyEnd);
}
if (scope.enablePan) {
var x = 0.5 * (event.touches[0].pageX + event.touches[1].pageX);
var y = 0.5 * (event.touches[0].pageY + event.touches[1].pageY);
panEnd.set(x, y);
panDelta.subVectors(panEnd, panStart).multiplyScalar(scope.panSpeed);
pan(panDelta.x, panDelta.y);
panStart.copy(panEnd);
}
scope.update();
}
function handleTouchEnd(event) {
//console.log( 'handleTouchEnd' );
}
//
// event handlers - FSM: listen for events and reset state
//
function onMouseDown(event) {
if (scope.enabled === false) return;
event.preventDefault();
switch (event.button) {
case scope.mouseButtons.ORBIT:
if (scope.enableRotate === false) return;
handleMouseDownRotate(event);
state = STATE.ROTATE;
break;
case scope.mouseButtons.ZOOM:
if (scope.enableZoom === false) return;
handleMouseDownDolly(event);
state = STATE.DOLLY;
break;
case scope.mouseButtons.PAN:
if (scope.enablePan === false) return;
handleMouseDownPan(event);
state = STATE.PAN;
break;
}
if (state !== STATE.NONE) {
document.addEventListener("mousemove", onMouseMove, false);
document.addEventListener("mouseup", onMouseUp, false);
scope.dispatchEvent(startEvent);
}
}
function onMouseMove(event) {
if (scope.enabled === false) return;
event.preventDefault();
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 onMouseUp(event) {
if (scope.enabled === false) return;
handleMouseUp(event);
document.removeEventListener("mousemove", onMouseMove, false);
document.removeEventListener("mouseup", onMouseUp, false);
scope.dispatchEvent(endEvent);
state = STATE.NONE;
}
function onMouseWheel(event) {
if (
scope.enabled === false ||
scope.enableZoom === false ||
(state !== STATE.NONE && state !== STATE.ROTATE)
)
return;
event.preventDefault();
event.stopPropagation();
scope.dispatchEvent(startEvent);
handleMouseWheel(event);
scope.dispatchEvent(endEvent);
}
function onKeyDown(event) {
if (
scope.enabled === false ||
scope.enableKeys === false ||
scope.enablePan === false
)
return;
handleKeyDown(event);
}
function onTouchStart(event) {
if (scope.enabled === false) return;
event.preventDefault();
switch (event.touches.length) {
case 1: // one-fingered touch: rotate
if (scope.enableRotate === false) return;
handleTouchStartRotate(event);
state = STATE.TOUCH_ROTATE;
break;
case 2: // two-fingered touch: dolly-pan
if (scope.enableZoom === false && scope.enablePan === false) return;
handleTouchStartDollyPan(event);
state = STATE.TOUCH_DOLLY_PAN;
break;
default:
state = STATE.NONE;
}
if (state !== STATE.NONE) {
scope.dispatchEvent(startEvent);
}
}
function onTouchMove(event) {
if (scope.enabled === false) return;
event.preventDefault();
event.stopPropagation();
switch (event.touches.length) {
case 1: // one-fingered touch: rotate
if (scope.enableRotate === false) return;
if (state !== STATE.TOUCH_ROTATE) return; // is this needed?
handleTouchMoveRotate(event);
break;
case 2: // two-fingered touch: dolly-pan
if (scope.enableZoom === false && scope.enablePan === false) return;
if (state !== STATE.TOUCH_DOLLY_PAN) return; // is this needed?
handleTouchMoveDollyPan(event);
break;
default:
state = STATE.NONE;
}
}
function onTouchEnd(event) {
if (scope.enabled === false) return;
handleTouchEnd(event);
scope.dispatchEvent(endEvent);
state = STATE.NONE;
}
function onContextMenu(event) {
if (scope.enabled === false) return;
event.preventDefault();
}
//
scope.domElement.addEventListener("contextmenu", onContextMenu, false);
scope.domElement.addEventListener("mousedown", onMouseDown, false);
scope.domElement.addEventListener("wheel", onMouseWheel, false);
scope.domElement.addEventListener("touchstart", onTouchStart, false);
scope.domElement.addEventListener("touchend", onTouchEnd, false);
scope.domElement.addEventListener("touchmove", onTouchMove, false);
window.addEventListener("keydown", onKeyDown, false);
// force an update at start
this.update();
};
THREE.OrbitControls.prototype = Object.create(THREE.EventDispatcher.prototype);
THREE.OrbitControls.prototype.constructor = THREE.OrbitControls;
Object.defineProperties(THREE.OrbitControls.prototype, {
center: {
get: function () {
console.warn("THREE.OrbitControls: .center has been renamed to .target");
return this.target;
},
},
// backward compatibility
noZoom: {
get: function () {
console.warn(
"THREE.OrbitControls: .noZoom has been deprecated. Use .enableZoom instead."
);
return !this.enableZoom;
},
set: function (value) {
console.warn(
"THREE.OrbitControls: .noZoom has been deprecated. Use .enableZoom instead."
);
this.enableZoom = !value;
},
},
noRotate: {
get: function () {
console.warn(
"THREE.OrbitControls: .noRotate has been deprecated. Use .enableRotate instead."
);
return !this.enableRotate;
},
set: function (value) {
console.warn(
"THREE.OrbitControls: .noRotate has been deprecated. Use .enableRotate instead."
);
this.enableRotate = !value;
},
},
noPan: {
get: function () {
console.warn(
"THREE.OrbitControls: .noPan has been deprecated. Use .enablePan instead."
);
return !this.enablePan;
},
set: function (value) {
console.warn(
"THREE.OrbitControls: .noPan has been deprecated. Use .enablePan instead."
);
this.enablePan = !value;
},
},
noKeys: {
get: function () {
console.warn(
"THREE.OrbitControls: .noKeys has been deprecated. Use .enableKeys instead."
);
return !this.enableKeys;
},
set: function (value) {
console.warn(
"THREE.OrbitControls: .noKeys has been deprecated. Use .enableKeys instead."
);
this.enableKeys = !value;
},
},
staticMoving: {
get: function () {
console.warn(
"THREE.OrbitControls: .staticMoving has been deprecated. Use .enableDamping instead."
);
return !this.enableDamping;
},
set: function (value) {
console.warn(
"THREE.OrbitControls: .staticMoving has been deprecated. Use .enableDamping instead."
);
this.enableDamping = !value;
},
},
dynamicDampingFactor: {
get: function () {
console.warn(
"THREE.OrbitControls: .dynamicDampingFactor has been renamed. Use .dampingFactor instead."
);
return this.dampingFactor;
},
set: function (value) {
console.warn(
"THREE.OrbitControls: .dynamicDampingFactor has been renamed. Use .dampingFactor instead."
);
this.dampingFactor = value;
},
},
});