酷炫3D液体网状波浪动画特效

刺骨的言语ヽ痛彻心扉 2023-02-28 05:28 356阅读 0赞

![在这里插入图片描述][20200720142653831.gif]

css代码

html, body { 
      margin: 0;
    }
    
    canvas { 
      display: block;
    }

另外创建俩个js文件

/** * @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 * @author ScieCode / http://github.com/sciecode */
    
    // 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
    
    THREE.OrbitControls = function ( object, domElement ) { 
    
    	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;
    
    	// Set to false to disable this control
    	this.enabled = true;
    
    	// "target" sets the location of focus, where the object orbits around
    	this.target = new THREE.Vector3();
    
    	// 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, must be a sub-interval of the interval [ - Math.PI, Math.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 = false; // if true, pan in screen-space
    	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 round when fps is 60
    
    	// Set to false to disable use of the keys
    	this.enableKeys = true;
    
    	// The four arrow keys
    	this.keys = {  LEFT: 37, UP: 38, RIGHT: 39, BOTTOM: 40 };
    
    	// Mouse buttons
    	this.mouseButtons = {  LEFT: THREE.MOUSE.ROTATE, MIDDLE: THREE.MOUSE.DOLLY, RIGHT: THREE.MOUSE.PAN };
    
    	// Touch fingers
    	this.touches = {  ONE: THREE.TOUCH.ROTATE, TWO: THREE.TOUCH.DOLLY_PAN };
    
    	// for reset
    	this.target0 = this.target.clone();
    	this.position0 = this.object.position.clone();
    	this.zoom0 = this.object.zoom;
    
    	//
    	// public methods
    	//
    
    	this.getPolarAngle = function () { 
    
    		return spherical.phi;
    
    	};
    
    	this.getAzimuthalAngle = function () { 
    
    		return spherical.theta;
    
    	};
    
    	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 () { 
    
    		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() );
    
    			}
    
    			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
    			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
    
    			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, 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 );
    
    		scope.domElement.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_PAN: 4,
    		TOUCH_DOLLY_PAN: 5,
    		TOUCH_DOLLY_ROTATE: 6
    	};
    
    	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;
    
    			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 ) { 
    
    		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 );
    
    		var 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 ) { 
    
    			dollyIn( getZoomScale() );
    
    		} else if ( dollyDelta.y < 0 ) { 
    
    			dollyOut( 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 ) { 
    
    			dollyOut( getZoomScale() );
    
    		} else if ( event.deltaY > 0 ) { 
    
    			dollyIn( getZoomScale() );
    
    		}
    
    		scope.update();
    
    	}
    
    	function handleKeyDown( event ) { 
    
    		var needsUpdate = false;
    
    		switch ( event.keyCode ) { 
    
    			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( event ) { 
    
    		if ( event.touches.length == 1 ) { 
    
    			rotateStart.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
    
    		} else { 
    
    			var x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
    			var y = 0.5 * ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY );
    
    			rotateStart.set( x, y );
    
    		}
    
    	}
    
    	function handleTouchStartPan( event ) { 
    
    		if ( event.touches.length == 1 ) { 
    
    			panStart.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
    
    		} else { 
    
    			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 handleTouchStartDolly( event ) { 
    
    		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 );
    
    	}
    
    	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 ( event.touches.length == 1 ) { 
    
    			rotateEnd.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
    
    		} else { 
    
    			var x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
    			var y = 0.5 * ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY );
    
    			rotateEnd.set( x, y );
    
    		}
    
    		rotateDelta.subVectors( rotateEnd, rotateStart ).multiplyScalar( scope.rotateSpeed );
    
    		var 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 ( event.touches.length == 1 ) { 
    
    			panEnd.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
    
    		} else { 
    
    			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 );
    
    	}
    
    	function handleTouchMoveDolly( event ) { 
    
    		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 );
    
    	}
    
    	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 onMouseDown( event ) { 
    
    		if ( scope.enabled === false ) return;
    
    		// Prevent the browser from scrolling.
    
    		event.preventDefault();
    
    		// Manually set the focus since calling preventDefault above
    		// prevents the browser from setting it automatically.
    
    		scope.domElement.focus ? scope.domElement.focus() : window.focus();
    
    		switch ( event.button ) { 
    
    			case 0:
    
    				switch ( scope.mouseButtons.LEFT ) { 
    
    					case THREE.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 THREE.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;
    
    				}
    
    				break;
    
    
    			case 1:
    
    				switch ( scope.mouseButtons.MIDDLE ) { 
    
    					case THREE.MOUSE.DOLLY:
    
    						if ( scope.enableZoom === false ) return;
    
    						handleMouseDownDolly( event );
    
    						state = STATE.DOLLY;
    
    						break;
    
    
    					default:
    
    						state = STATE.NONE;
    
    				}
    
    				break;
    
    			case 2:
    
    				switch ( scope.mouseButtons.RIGHT ) { 
    
    					case THREE.MOUSE.ROTATE:
    
    						if ( scope.enableRotate === false ) return;
    
    						handleMouseDownRotate( event );
    
    						state = STATE.ROTATE;
    
    						break;
    
    					case THREE.MOUSE.PAN:
    
    						if ( scope.enablePan === false ) return;
    
    						handleMouseDownPan( event );
    
    						state = STATE.PAN;
    
    						break;
    
    					default:
    
    						state = STATE.NONE;
    
    				}
    
    				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:
    
    				switch ( scope.touches.ONE ) { 
    
    					case THREE.TOUCH.ROTATE:
    
    						if ( scope.enableRotate === false ) return;
    
    						handleTouchStartRotate( event );
    
    						state = STATE.TOUCH_ROTATE;
    
    						break;
    
    					case THREE.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 THREE.TOUCH.DOLLY_PAN:
    
    						if ( scope.enableZoom === false && scope.enablePan === false ) return;
    
    						handleTouchStartDollyPan( event );
    
    						state = STATE.TOUCH_DOLLY_PAN;
    
    						break;
    
    					case THREE.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 ) { 
    
    		if ( scope.enabled === false ) return;
    
    		event.preventDefault();
    		event.stopPropagation();
    
    		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 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 );
    
    	scope.domElement.addEventListener( 'keydown', onKeyDown, false );
    
    	// make sure element can receive keys.
    
    	if ( scope.domElement.tabIndex === - 1 ) { 
    
    		scope.domElement.tabIndex = 0;
    
    	}
    
    	// force an update at start
    
    	this.update();
    
    };
    
    THREE.OrbitControls.prototype = Object.create( THREE.EventDispatcher.prototype );
    THREE.OrbitControls.prototype.constructor = THREE.OrbitControls;
    
    
    // This set of controls performs orbiting, dollying (zooming), and panning.
    // Unlike TrackballControls, it maintains the "up" direction object.up (+Y by default).
    // This is very similar to OrbitControls, another set of touch behavior
    //
    // Orbit - right mouse, or left mouse + ctrl/meta/shiftKey / touch: two-finger rotate
    // Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
    // Pan - left mouse, or arrow keys / touch: one-finger move
    
    THREE.MapControls = function ( object, domElement ) { 
    
    	THREE.OrbitControls.call( this, object, domElement );
    
    	this.mouseButtons.LEFT = THREE.MOUSE.PAN;
    	this.mouseButtons.RIGHT = THREE.MOUSE.ROTATE;
    
    	this.touches.ONE = THREE.TOUCH.PAN;
    	this.touches.TWO = THREE.TOUCH.DOLLY_ROTATE;
    
    };
    
    THREE.MapControls.prototype = Object.create( THREE.EventDispatcher.prototype );
    THREE.MapControls.prototype.constructor = THREE.MapControls;

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[20200720142653831.gif]: /images/20230209/2e3a1e0f9efe425ba22627f82193914d.png