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orbit.js
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orbit.js
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import {
EventDispatcher,
MOUSE,
Quaternion,
Spherical,
TOUCH,
Vector2,
Vector3
} from 'https://cdn.skypack.dev/three@0.133.0';
// 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 left mouse + ctrl/meta/shiftKey, or arrow keys / touch: two-finger move
const _changeEvent = { type: 'change' };
const _startEvent = { type: 'start' };
const _endEvent = { type: 'end' };
class OrbitControls extends EventDispatcher {
constructor(object, domElement) {
super();
if (domElement === undefined) console.warn('THREE.OrbitControls: The second parameter "domElement" is now mandatory.');
if (domElement === document) console.error('THREE.OrbitControls: "document" should not be used as the target "domElement". Please use "renderer.domElement" instead.');
this.object = object;
this.domElement = domElement;
this.domElement.style.touchAction = 'none'; // disable touch scroll
// Set to false to disable this control
this.enabled = true;
// "target" sets the location of focus, where the object orbits around
this.target = new Vector3(0.0, 50.0, 0.0);
// How far you can dolly in and out ( PerspectiveCamera only )
this.minDistance = 0;
this.maxDistance = Infinity;
// How far you can zoom in and out ( OrthographicCamera only )
this.minZoom = 0;
this.maxZoom = Infinity;
// How far you can orbit vertically, upper and lower limits.
// Range is 0 to Math.PI radians.
this.minPolarAngle = 0; // radians
this.maxPolarAngle = Math.PI; // radians
// How far you can orbit horizontally, upper and lower limits.
// If set, the interval [ min, max ] must be a sub-interval of [ - 2 PI, 2 PI ], with ( max - min < 2 PI )
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
this.enableDamping = false;
this.dampingFactor = 0.05;
// This option actually enables dollying in and out; left as "zoom" for backwards compatibility.
// Set to false to disable zooming
this.enableZoom = true;
this.zoomSpeed = 1.0;
// Set to false to disable rotating
this.enableRotate = true;
this.rotateSpeed = 1.0;
// Set to false to disable panning
this.enablePan = true;
this.panSpeed = 1.0;
this.screenSpacePanning = true; // if false, pan orthogonal to world-space direction camera.up
this.keyPanSpeed = 7.0; // pixels moved per arrow key push
// Set to true to automatically rotate around the target
// If auto-rotate is enabled, you must call controls.update() in your animation loop
this.autoRotate = false;
this.autoRotateSpeed = 2.0; // 30 seconds per orbit when fps is 60
// The four arrow keys
this.keys = { LEFT: 'ArrowLeft', UP: 'ArrowUp', RIGHT: 'ArrowRight', BOTTOM: 'ArrowDown' };
// Mouse buttons
this.mouseButtons = { LEFT: MOUSE.ROTATE, MIDDLE: MOUSE.DOLLY, RIGHT: MOUSE.PAN };
// Touch fingers
this.touches = { ONE: TOUCH.ROTATE, TWO: TOUCH.DOLLY_PAN };
// for reset
this.target0 = this.target.clone();
this.position0 = this.object.position.clone();
this.zoom0 = this.object.zoom;
// the target DOM element for key events
this._domElementKeyEvents = null;
//
// public methods
//
this.getPolarAngle = function() {
return spherical.phi;
};
this.getAzimuthalAngle = function() {
return spherical.theta;
};
this.getDistance = function() {
return this.object.position.distanceTo(this.target);
};
this.listenToKeyEvents = function(domElement) {
domElement.addEventListener('keydown', onKeyDown);
this._domElementKeyEvents = domElement;
};
this.saveState = function() {
scope.target0.copy(scope.target);
scope.position0.copy(scope.object.position);
scope.zoom0 = scope.object.zoom;
};
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() {
const offset = new Vector3();
// so camera.up is the orbit axis
const quat = new Quaternion().setFromUnitVectors(object.up, new Vector3(0, 1, 0));
const quatInverse = quat.clone().invert();
const lastPosition = new Vector3();
const lastQuaternion = new Quaternion();
const twoPI = 2 * Math.PI;
return function update() {
const 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());
}
if (scope.enableDamping) {
spherical.theta += sphericalDelta.theta * scope.dampingFactor;
spherical.phi += sphericalDelta.phi * scope.dampingFactor;
} else {
spherical.theta += sphericalDelta.theta;
spherical.phi += sphericalDelta.phi;
}
// restrict theta to be between desired limits
let min = scope.minAzimuthAngle;
let max = scope.maxAzimuthAngle;
if (isFinite(min) && isFinite(max)) {
if (min < -Math.PI) min += twoPI;
else if (min > Math.PI) min -= twoPI;
if (max < -Math.PI) max += twoPI;
else if (max > Math.PI) max -= twoPI;
if (min <= max) {
spherical.theta = Math.max(min, Math.min(max, spherical.theta));
} else {
spherical.theta = (spherical.theta > (min + max) / 2) ?
Math.max(min, spherical.theta) :
Math.min(max, 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
if (scope.enableDamping === true) {
scope.target.addScaledVector(panOffset, scope.dampingFactor);
} else {
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);
scope.domElement.removeEventListener('pointerdown', onPointerDown);
scope.domElement.removeEventListener('pointercancel', onPointerCancel);
scope.domElement.removeEventListener('wheel', onMouseWheel);
scope.domElement.removeEventListener('pointermove', onPointerMove);
scope.domElement.removeEventListener('pointerup', onPointerUp);
if (scope._domElementKeyEvents !== null) {
scope._domElementKeyEvents.removeEventListener('keydown', onKeyDown);
}
//scope.dispatchEvent( { type: 'dispose' } ); // should this be added here?
};
//
// internals
//
const scope = this;
const STATE = {
NONE: -1,
ROTATE: 0,
DOLLY: 1,
PAN: 2,
TOUCH_ROTATE: 3,
TOUCH_PAN: 4,
TOUCH_DOLLY_PAN: 5,
TOUCH_DOLLY_ROTATE: 6
};
let state = STATE.NONE;
const EPS = 0.000001;
// current position in spherical coordinates
const spherical = new Spherical();
const sphericalDelta = new Spherical();
let scale = 1;
const panOffset = new Vector3();
let zoomChanged = false;
const rotateStart = new Vector2();
const rotateEnd = new Vector2();
const rotateDelta = new Vector2();
const panStart = new Vector2();
const panEnd = new Vector2();
const panDelta = new Vector2();
const dollyStart = new Vector2();
const dollyEnd = new Vector2();
const dollyDelta = new Vector2();
const pointers = [];
const pointerPositions = {};
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;
}
const panLeft = function() {
const v = new Vector3();
return function panLeft(distance, objectMatrix) {
v.setFromMatrixColumn(objectMatrix, 0); // get X column of objectMatrix
v.multiplyScalar(-distance);
panOffset.add(v);
};
}();
const panUp = function() {
const v = new 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
const pan = function() {
const offset = new Vector3();
return function pan(deltaX, deltaY) {
const element = scope.domElement;
if (scope.object.isPerspectiveCamera) {
// perspective
const position = scope.object.position;
offset.copy(position).sub(scope.target);
let 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 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;
}
}
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;
}
}
//
// event callbacks - update the object state
//
function handleMouseDownRotate(event) {
rotateStart.set(event.clientX, event.clientY);
}
function handleMouseDownDolly(event) {
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());
} else if (dollyDelta.y < 0) {
dollyIn(getZoomScale());
}
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 handleMouseUp( /*event*/ ) {
// no-op
}
function handleMouseWheel(event) {
if (event.deltaY < 0) {
dollyIn(getZoomScale());
} else if (event.deltaY > 0) {
dollyOut(getZoomScale());
}
scope.update();
}
function handleKeyDown(event) {
let needsUpdate = false;
switch (event.code) {
case scope.keys.UP:
pan(0, scope.keyPanSpeed);
needsUpdate = true;
break;
case scope.keys.BOTTOM:
pan(0, -scope.keyPanSpeed);
needsUpdate = true;
break;
case scope.keys.LEFT:
pan(scope.keyPanSpeed, 0);
needsUpdate = true;
break;
case scope.keys.RIGHT:
pan(-scope.keyPanSpeed, 0);
needsUpdate = true;
break;
}
if (needsUpdate) {
// prevent the browser from scrolling on cursor keys
event.preventDefault();
scope.update();
}
}
function handleTouchStartRotate() {
if (pointers.length === 1) {
rotateStart.set(pointers[0].pageX, pointers[0].pageY);
} else {
const x = 0.5 * (pointers[0].pageX + pointers[1].pageX);
const y = 0.5 * (pointers[0].pageY + pointers[1].pageY);
rotateStart.set(x, y);
}
}
function handleTouchStartPan() {
if (pointers.length === 1) {
panStart.set(pointers[0].pageX, pointers[0].pageY);
} else {
const x = 0.5 * (pointers[0].pageX + pointers[1].pageX);
const y = 0.5 * (pointers[0].pageY + pointers[1].pageY);
panStart.set(x, y);
}
}
function handleTouchStartDolly() {
const dx = pointers[0].pageX - pointers[1].pageX;
const dy = pointers[0].pageY - pointers[1].pageY;
const distance = Math.sqrt(dx * dx + dy * dy);
dollyStart.set(0, distance);
}
function handleTouchStartDollyPan() {
if (scope.enableZoom) handleTouchStartDolly();
if (scope.enablePan) handleTouchStartPan();
}
function handleTouchStartDollyRotate() {
if (scope.enableZoom) handleTouchStartDolly();
if (scope.enableRotate) handleTouchStartRotate();
}
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);
}
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);
}
function handleTouchEnd( /*event*/ ) {
// no-op
}
//
// 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);
}
//
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) {
if (scope.enabled === false) return;
if (event.pointerType === 'touch') {
onTouchEnd();
} else {
onMouseUp(event);
}
removePointer(event);
//
if (pointers.length === 0) {
scope.domElement.releasePointerCapture(event.pointerId);
scope.domElement.removeEventListener('pointermove', onPointerMove);
scope.domElement.removeEventListener('pointerup', onPointerUp);
}
}
function onPointerCancel(event) {
removePointer(event);
}
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) {
if (scope.enabled === false) return;
switch (state) {
case STATE.ROTATE:
if (scope.enableRotate === false) return;
handleMouseMoveRotate(event);
break;
case STATE.DOLLY: