css代码
html, body {
margin: 0;
}
canvas {
display: block;
}js
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r118/three.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/chroma-js/2.1.0/chroma.min.js"></script>
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;
function App() {
const conf = {
el: 'canvas',
fov: 75,
cameraZ: 100,
};
let renderer, scene, camera, cameraCtrl;
let width, height, cx, cy, wWidth, wHeight;
let ripple;
let gridWWidth, gridWHeight;
let gridWidth, gridHeight;
const mouse = new THREE.Vector2();
const mousePlane = new THREE.Plane(new THREE.Vector3(0, 0, 1), 0);
const mousePosition = new THREE.Vector3();
const raycaster = new THREE.Raycaster();
let mouseOver = false;
init();
function init() {
// const gl = renderer.getContext();
// const floatTextures = gl.getExtension('OES_texture_float');
// if (!floatTextures) {
// alert('no floating point texture support');
// return;
// }
renderer = new THREE.WebGLRenderer({ canvas: document.getElementById(conf.el), antialias: true });
camera = new THREE.PerspectiveCamera(conf.fov);
camera.position.z = conf.cameraZ;
updateSize();
window.addEventListener('resize', updateSize, false);
// gridWHeight = wHeight - 20;
// gridWWidth = gridWHeight;
gridWHeight = wHeight;
gridWWidth = wWidth;
gridWidth = gridWWidth * width / wWidth;
gridHeight = gridWHeight * height / wHeight;
ripple = new RippleEffect(renderer, width, height);
const getGridMP = function (e) {
const v = new THREE.Vector3();
camera.getWorldDirection(v);
v.normalize();
mouse.x = ((e.clientX / width) * 2 - 1);
mouse.y = (-(e.clientY / height) * 2 + 1);
raycaster.setFromCamera(mouse, camera);
raycaster.ray.intersectPlane(mousePlane, mousePosition);
return { x: 2 * mousePosition.x / gridWWidth, y: 2 * mousePosition.y / gridWHeight };
};
renderer.domElement.addEventListener('mousemove', e => {
mouseOver = true;
const gp = getGridMP(e);
ripple.addDrop(gp.x, gp.y, 0.05, 0.1);
});
renderer.domElement.addEventListener('mouseleave', e => { mouseOver = false; });
// renderer.domElement.addEventListener('mouseup', e => {
// const gp = getGridMP(e);
// ripple.addDrop(gp.x, gp.y, 0.2, -3.0);
// });
initScene();
animate();
}
function initScene() {
scene = new THREE.Scene();
let pointLight1 = new THREE.PointLight(0xFFFF80);
pointLight1.position.set(-wWidth / 2, wHeight / 2, 50);
scene.add(pointLight1);
let pointLight2 = new THREE.PointLight(0xde3578);
pointLight2.position.set(wWidth / 2, wHeight / 2, 50);
scene.add(pointLight2);
let pointLight3 = new THREE.PointLight(0xFF4040);
pointLight3.position.set(-wWidth / 2, -wHeight / 2, 50);
scene.add(pointLight3);
let pointLight4 = new THREE.PointLight(0x0247e5);
pointLight4.position.set(wWidth / 2, -wHeight / 2, 50);
scene.add(pointLight4);
renderer.domElement.addEventListener('mouseup', e => {
pointLight1.color = new THREE.Color(chroma.random().hex());
pointLight2.color = new THREE.Color(chroma.random().hex());
pointLight3.color = new THREE.Color(chroma.random().hex());
pointLight4.color = new THREE.Color(chroma.random().hex());
});
const material = new THREE.MeshStandardMaterial({ color: 0xffffff, side: THREE.DoubleSide, metalness: 0.5, roughness: 0.5, onBeforeCompile: shader => {
shader.uniforms.hmap = { value: ripple.hMap.texture };
shader.vertexShader = "uniform sampler2D hmap;\n" + shader.vertexShader;
const token = '#include <begin_vertex>';
const customTransform = `
vec3 transformed = vec3(position);
vec4 info = texture2D(hmap, uv);
vNormal = vec3(info.b, sqrt(1.0 - dot(info.ba, info.ba)), info.a).xzy;
transformed.z = 20. * info.r;
`;
shader.vertexShader = shader.vertexShader.replace(token, customTransform);
} });
let nx = Math.round(gridWidth / 5), ny = Math.round(gridHeight / 40);
let dx = gridWWidth / nx, dy = gridWHeight / ny;
for (let j = 0; j <= ny; j++) {
const geometry = new THREE.BufferGeometry();
const positions = [], uvs = [];
const y = - gridWHeight / 2 + j * dy;
for (let i = 0; i <= nx; i++) {
positions.push(- gridWWidth / 2 + i * dx, y, 0);
uvs.push(i / nx, j / ny);
}
geometry.setAttribute('position', new THREE.Float32BufferAttribute(positions, 3));
geometry.setAttribute('uv', new THREE.Float32BufferAttribute(uvs, 2));
geometry.computeBoundingSphere();
scene.add(new THREE.Line(geometry, material));
}
nx = Math.round(gridWidth / 40); ny = Math.round(gridHeight / 5);
dx = gridWWidth / nx; dy = gridWHeight / ny;
for (let i = 0; i <= nx; i++) {
const geometry = new THREE.BufferGeometry();
const positions = [], uvs = [];
const x = - gridWWidth / 2 + i * dx;
for (let j = 0; j <= ny; j++) {
positions.push(x, - gridWHeight / 2 + j * dy, 0);
uvs.push(i / nx, j / ny);
}
geometry.setAttribute('position', new THREE.Float32BufferAttribute(positions, 3));
geometry.setAttribute('uv', new THREE.Float32BufferAttribute(uvs, 2));
geometry.computeBoundingSphere();
scene.add(new THREE.Line(geometry, material));
}
camera.position.set(0, -gridWHeight/2, 40);
camera.lookAt(new THREE.Vector3(0, -gridWHeight/6, 0));
cameraCtrl = new THREE.OrbitControls(camera, renderer.domElement);
cameraCtrl.enableDamping = true;
cameraCtrl.dampingFactor = 0.1;
cameraCtrl.rotateSpeed = 0.5;
}
function animate() {
if (!mouseOver) {
const time = Date.now() * 0.001;
const x = Math.cos(time) * 0.2;
const y = Math.sin(time) * 0.2;
ripple.addDrop(x, y, 0.05, -0.04);
}
ripple.update();
renderer.render(scene, camera);
requestAnimationFrame(animate);
}
function updateSize() {
width = window.innerWidth; cx = width / 2;
height = window.innerHeight; cy = height / 2;
renderer.setSize(width, height);
camera.aspect = width / height;
camera.updateProjectionMatrix();
const wsize = getRendererSize();
wWidth = wsize[0]; wHeight = wsize[1];
}
function getRendererSize() {
const cam = new THREE.PerspectiveCamera(camera.fov, camera.aspect);
const vFOV = (cam.fov * Math.PI) / 180;
const height = 2 * Math.tan(vFOV / 2) * Math.abs(conf.cameraZ);
const width = height * cam.aspect;
return [width, height];
}
}
const RippleEffect = (function () {
function RippleEffect(renderer, width, height) {
this.renderer = renderer;
this.width = 512;
this.height = 512;
// this.delta = new THREE.Vector2(this.width / Math.pow(width, 2), this.height / Math.pow(height, 2));
this.delta = new THREE.Vector2(1 / this.width, 1 / this.height);
this.hMap = new THREE.WebGLRenderTarget(this.width, this.height, { type: THREE.FloatType, depthBuffer: false, stencilBuffer: false });
this.hMap1 = new THREE.WebGLRenderTarget(this.width, this.height, { type: THREE.FloatType, depthBuffer: false, stencilBuffer: false });
this.fsQuad = new FullScreenQuad();
this.initShaders();
}
RippleEffect.prototype.initShaders = function () {
// default vertex shader
const defaultVertexShader = `
varying vec2 vUv;
void main() {
vUv = uv;
gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);
}
`;
this.copyMat = new THREE.ShaderMaterial({
uniforms: { 'tDiffuse': { value: null } },
vertexShader: defaultVertexShader,
fragmentShader: `
uniform sampler2D tDiffuse;
varying vec2 vUv;
void main() {
gl_FragColor = texture2D(tDiffuse, vUv);
}
`,
});
this.updateMat = new THREE.ShaderMaterial({
uniforms: {
'tDiffuse': { value: null },
'delta': new THREE.Uniform(this.delta),
},
vertexShader: defaultVertexShader,
fragmentShader: `
uniform sampler2D tDiffuse;
uniform vec2 delta;
varying vec2 vUv;
void main() {
vec4 texel = texture2D(tDiffuse, vUv);
vec2 dx = vec2(delta.x, 0.0);
vec2 dy = vec2(0.0, delta.y);
float average = (
texture2D(tDiffuse, vUv - dx).r +
texture2D(tDiffuse, vUv - dy).r +
texture2D(tDiffuse, vUv + dx).r +
texture2D(tDiffuse, vUv + dy).r
) * 0.25;
texel.g += (average - texel.r) * 2.0;
texel.g *= 0.995;
texel.r += texel.g;
gl_FragColor = texel;
}
`,
});
this.normalsMat = new THREE.ShaderMaterial({
uniforms: {
'tDiffuse': { value: null },
'delta': new THREE.Uniform(this.delta),
},
vertexShader: defaultVertexShader,
fragmentShader: `
uniform sampler2D tDiffuse;
uniform vec2 delta;
varying vec2 vUv;
void main() {
vec4 texel = texture2D(tDiffuse, vUv);
vec3 dx = vec3(delta.x, texture2D(tDiffuse, vec2(vUv.x + delta.x, vUv.y)).r - texel.r, 0.0);
vec3 dy = vec3(0.0, texture2D(tDiffuse, vec2(vUv.x, vUv.y + delta.y)).r - texel.r, delta.y);
texel.ba = normalize(cross(dy, dx)).xz;
gl_FragColor = texel;
}
`,
});
this.dropMat = new THREE.ShaderMaterial({
uniforms: {
'tDiffuse': { value: null },
'center': new THREE.Uniform(new THREE.Vector2()),
'radius': { value: 0.05 },
'strength': { value: 0.5 },
},
vertexShader: defaultVertexShader,
fragmentShader: `
const float PI = 3.1415926535897932384626433832795;
uniform sampler2D tDiffuse;
uniform vec2 center;
uniform float radius;
uniform float strength;
varying vec2 vUv;
void main() {
vec4 texel = texture2D(tDiffuse, vUv);
float drop = max(0.0, 1.0 - length(center * 0.5 + 0.5 - vUv) / radius);
drop = 0.5 - cos(drop * PI) * 0.5;
texel.r += drop * strength;
// texel.r = clamp(texel.r, -2.0, 2.0);
gl_FragColor = texel;
}
`,
});
};
RippleEffect.prototype.update = function () {
this.updateHMap();
this.updateHMapNormals();
};
RippleEffect.prototype.updateHMap = function () {
this.updateMat.uniforms.tDiffuse.value = this.hMap.texture;
this.renderShaderMat(this.updateMat, this.hMap1);
this.swapBuffers();
};
RippleEffect.prototype.updateHMapNormals = function () {
this.normalsMat.uniforms.tDiffuse.value = this.hMap.texture;
this.renderShaderMat(this.normalsMat, this.hMap1);
this.swapBuffers();
};
RippleEffect.prototype.addDrop = function (x, y, radius, strength) {
this.dropMat.uniforms.tDiffuse.value = this.hMap.texture;
this.dropMat.uniforms.center.value.set(x, y);
this.dropMat.uniforms.radius.value = radius;
this.dropMat.uniforms.strength.value = strength;
this.renderShaderMat(this.dropMat, this.hMap1);
this.swapBuffers();
};
RippleEffect.prototype.renderBuffer = function (buffer, target) {
target = target ? target : null;
this.copyMat.uniforms.tDiffuse.value = buffer.texture;
this.renderShaderMat(this.copyMat, target);
};
RippleEffect.prototype.renderShaderMat = function (mat, target) {
this.fsQuad.material = mat;
const oldTarget = this.renderer.getRenderTarget();
this.renderer.setRenderTarget(target);
this.fsQuad.render(this.renderer);
this.renderer.setRenderTarget(oldTarget);
};
RippleEffect.prototype.swapBuffers = function () {
const temp = this.hMap;
this.hMap = this.hMap1;
this.hMap1 = temp;
};
// from https://threejs.org/examples/js/postprocessing/EffectComposer.js
const FullScreenQuad = (function () {
const camera = new THREE.OrthographicCamera(- 1, 1, 1, - 1, 0, 1);
const geometry = new THREE.PlaneBufferGeometry(2, 2);
const FullScreenQuad = function (material) {
this._mesh = new THREE.Mesh(geometry, material);
};
Object.defineProperty(FullScreenQuad.prototype, 'material', {
get: function () { return this._mesh.material; },
set: function (value) { this._mesh.material = value; }
});
Object.assign(FullScreenQuad.prototype, {
render: function (renderer) {
renderer.render(this._mesh, camera);
}
});
return FullScreenQuad;
})();
return RippleEffect;
})();
App();html
<canvas id="canvas"></canvas>
