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326 lines
6.6 KiB
326 lines
6.6 KiB
import {
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MathUtils,
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Spherical,
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Vector3
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} from 'three';
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const _lookDirection = new Vector3();
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const _spherical = new Spherical();
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const _target = new Vector3();
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class FirstPersonControls {
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constructor( object, domElement ) {
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this.object = object;
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this.domElement = domElement;
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// API
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this.enabled = true;
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this.movementSpeed = 1.0;
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this.lookSpeed = 0.005;
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this.lookVertical = true;
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this.autoForward = false;
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this.activeLook = true;
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this.heightSpeed = false;
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this.heightCoef = 1.0;
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this.heightMin = 0.0;
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this.heightMax = 1.0;
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this.constrainVertical = false;
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this.verticalMin = 0;
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this.verticalMax = Math.PI;
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this.mouseDragOn = false;
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// internals
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this.autoSpeedFactor = 0.0;
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this.pointerX = 0;
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this.pointerY = 0;
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this.moveForward = false;
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this.moveBackward = false;
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this.moveLeft = false;
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this.moveRight = false;
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this.viewHalfX = 0;
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this.viewHalfY = 0;
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// private variables
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let lat = 0;
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let lon = 0;
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//
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this.handleResize = function () {
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if ( this.domElement === document ) {
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this.viewHalfX = window.innerWidth / 2;
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this.viewHalfY = window.innerHeight / 2;
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} else {
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this.viewHalfX = this.domElement.offsetWidth / 2;
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this.viewHalfY = this.domElement.offsetHeight / 2;
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}
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};
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this.onPointerDown = function ( event ) {
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if ( this.domElement !== document ) {
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this.domElement.focus();
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}
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if ( this.activeLook ) {
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switch ( event.button ) {
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case 0: this.moveForward = true; break;
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case 2: this.moveBackward = true; break;
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}
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}
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this.mouseDragOn = true;
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};
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this.onPointerUp = function ( event ) {
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if ( this.activeLook ) {
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switch ( event.button ) {
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case 0: this.moveForward = false; break;
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case 2: this.moveBackward = false; break;
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}
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}
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this.mouseDragOn = false;
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};
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this.onPointerMove = function ( event ) {
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if ( this.domElement === document ) {
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this.pointerX = event.pageX - this.viewHalfX;
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this.pointerY = event.pageY - this.viewHalfY;
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} else {
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this.pointerX = event.pageX - this.domElement.offsetLeft - this.viewHalfX;
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this.pointerY = event.pageY - this.domElement.offsetTop - this.viewHalfY;
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}
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};
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this.onKeyDown = function ( event ) {
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switch ( event.code ) {
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case 'ArrowUp':
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case 'KeyW': this.moveForward = true; break;
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case 'ArrowLeft':
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case 'KeyA': this.moveLeft = true; break;
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case 'ArrowDown':
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case 'KeyS': this.moveBackward = true; break;
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case 'ArrowRight':
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case 'KeyD': this.moveRight = true; break;
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case 'KeyR': this.moveUp = true; break;
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case 'KeyF': this.moveDown = true; break;
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}
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};
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this.onKeyUp = function ( event ) {
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switch ( event.code ) {
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case 'ArrowUp':
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case 'KeyW': this.moveForward = false; break;
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case 'ArrowLeft':
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case 'KeyA': this.moveLeft = false; break;
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case 'ArrowDown':
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case 'KeyS': this.moveBackward = false; break;
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case 'ArrowRight':
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case 'KeyD': this.moveRight = false; break;
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case 'KeyR': this.moveUp = false; break;
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case 'KeyF': this.moveDown = false; break;
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}
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};
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this.lookAt = function ( x, y, z ) {
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if ( x.isVector3 ) {
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_target.copy( x );
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} else {
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_target.set( x, y, z );
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}
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this.object.lookAt( _target );
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setOrientation( this );
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return this;
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};
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this.update = function () {
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const targetPosition = new Vector3();
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return function update( delta ) {
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if ( this.enabled === false ) return;
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if ( this.heightSpeed ) {
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const y = MathUtils.clamp( this.object.position.y, this.heightMin, this.heightMax );
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const heightDelta = y - this.heightMin;
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this.autoSpeedFactor = delta * ( heightDelta * this.heightCoef );
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} else {
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this.autoSpeedFactor = 0.0;
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}
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const actualMoveSpeed = delta * this.movementSpeed;
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if ( this.moveForward || ( this.autoForward && ! this.moveBackward ) ) this.object.translateZ( - ( actualMoveSpeed + this.autoSpeedFactor ) );
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if ( this.moveBackward ) this.object.translateZ( actualMoveSpeed );
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if ( this.moveLeft ) this.object.translateX( - actualMoveSpeed );
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if ( this.moveRight ) this.object.translateX( actualMoveSpeed );
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if ( this.moveUp ) this.object.translateY( actualMoveSpeed );
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if ( this.moveDown ) this.object.translateY( - actualMoveSpeed );
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let actualLookSpeed = delta * this.lookSpeed;
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if ( ! this.activeLook ) {
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actualLookSpeed = 0;
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}
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let verticalLookRatio = 1;
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if ( this.constrainVertical ) {
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verticalLookRatio = Math.PI / ( this.verticalMax - this.verticalMin );
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}
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lon -= this.pointerX * actualLookSpeed;
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if ( this.lookVertical ) lat -= this.pointerY * actualLookSpeed * verticalLookRatio;
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lat = Math.max( - 85, Math.min( 85, lat ) );
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let phi = MathUtils.degToRad( 90 - lat );
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const theta = MathUtils.degToRad( lon );
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if ( this.constrainVertical ) {
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phi = MathUtils.mapLinear( phi, 0, Math.PI, this.verticalMin, this.verticalMax );
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}
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const position = this.object.position;
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targetPosition.setFromSphericalCoords( 1, phi, theta ).add( position );
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this.object.lookAt( targetPosition );
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};
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}();
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this.dispose = function () {
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this.domElement.removeEventListener( 'contextmenu', contextmenu );
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this.domElement.removeEventListener( 'pointerdown', _onPointerDown );
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this.domElement.removeEventListener( 'pointermove', _onPointerMove );
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this.domElement.removeEventListener( 'pointerup', _onPointerUp );
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window.removeEventListener( 'keydown', _onKeyDown );
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window.removeEventListener( 'keyup', _onKeyUp );
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};
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const _onPointerMove = this.onPointerMove.bind( this );
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const _onPointerDown = this.onPointerDown.bind( this );
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const _onPointerUp = this.onPointerUp.bind( this );
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const _onKeyDown = this.onKeyDown.bind( this );
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const _onKeyUp = this.onKeyUp.bind( this );
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this.domElement.addEventListener( 'contextmenu', contextmenu );
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this.domElement.addEventListener( 'pointerdown', _onPointerDown );
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this.domElement.addEventListener( 'pointermove', _onPointerMove );
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this.domElement.addEventListener( 'pointerup', _onPointerUp );
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window.addEventListener( 'keydown', _onKeyDown );
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window.addEventListener( 'keyup', _onKeyUp );
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function setOrientation( controls ) {
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const quaternion = controls.object.quaternion;
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_lookDirection.set( 0, 0, - 1 ).applyQuaternion( quaternion );
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_spherical.setFromVector3( _lookDirection );
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lat = 90 - MathUtils.radToDeg( _spherical.phi );
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lon = MathUtils.radToDeg( _spherical.theta );
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}
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this.handleResize();
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setOrientation( this );
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}
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}
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function contextmenu( event ) {
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event.preventDefault();
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}
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export { FirstPersonControls };
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