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June 8, 2020 15:18
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Example controls for react-three-fiber with animating camera
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| import TWEEN from '@tweenjs/tween.js'; | |
| import React, { useEffect, useRef } from 'react'; | |
| import { extend, useFrame, useThree } from 'react-three-fiber'; | |
| import * as THREE from 'three'; | |
| import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls'; | |
| // extend THREE to include OrbitControls | |
| extend({ OrbitControls }); | |
| const ALT_KEY = 18; | |
| const CTRL_KEY = 17; | |
| const CMD_KEY = 91; | |
| function Controls( | |
| { lookAt, initialCameraPosition, useTrackball = false }, | |
| ref | |
| ) { | |
| const { scene, camera, gl } = useThree(); | |
| console.log('camera.pos', camera?.position); | |
| const controls = useRef(); | |
| React.useImperativeHandle(ref, () => ({ | |
| resetCamera: duration => { | |
| tweenLookAt(new THREE.Vector3(0, 0, 0), initialCameraPosition, { | |
| duration, | |
| }); | |
| }, | |
| tweenTo: ({ x, y, z, cx, cy, cz }, options) => | |
| tweenLookAt({ x, y, z }, [cx, cy, cz], options), | |
| getCurrentState: includeUp => getCurrentState(includeUp), | |
| })); | |
| useFrame(() => { | |
| TWEEN.update(); | |
| controls.current.update(); | |
| }); | |
| window.c = controls; | |
| window.cam = camera; | |
| function getCurrentState(includeUp = useTrackball) { | |
| const currentState = { | |
| x: controls.current.target.x, | |
| y: controls.current.target.y, | |
| z: controls.current.target.z, | |
| cx: camera.position.x, | |
| cy: camera.position.y, | |
| cz: camera.position.z, | |
| }; | |
| if (includeUp) { | |
| currentState.upx = camera.up.x; | |
| currentState.upy = camera.up.y; | |
| currentState.upz = camera.up.z; | |
| } | |
| return currentState; | |
| } | |
| function tweenLookAt( | |
| lookAt, | |
| cameraPosition, | |
| { cameraOffset = 50, duration = 1000 } = {} | |
| ) { | |
| console.log('tweenLookAt duration=', duration); | |
| if (lookAt) { | |
| const source = getCurrentState(); | |
| const target = { | |
| x: lookAt.x, | |
| y: lookAt.y, | |
| z: lookAt.z, | |
| cx: lookAt.x + 0, | |
| cy: lookAt.y + cameraOffset, | |
| cz: lookAt.z + cameraOffset, //overrides.cameraZ == null ? lookAt.z + 3 : overrides.cameraZ, | |
| // reset up vector (trackball only) | |
| upx: controls.current.up0 ? controls.current.up0.x : 0, | |
| upy: controls.current.up0 ? controls.current.up0.y : 1, | |
| upz: controls.current.up0 ? controls.current.up0.z : 0, | |
| }; | |
| if (cameraPosition) { | |
| target.cx = cameraPosition[0]; | |
| target.cy = cameraPosition[1]; | |
| target.cz = cameraPosition[2]; | |
| } | |
| const t = new TWEEN.Tween(source) | |
| .to(target, duration) | |
| // .easing(TWEEN.Easing.Cubic.InOut) | |
| .onUpdate(function(object) { | |
| if (controls.current) { | |
| // camera.up.set(object.upx, object.upy, object.upz); // might only be needed for trackball | |
| camera.position.set(object.cx, object.cy, object.cz); | |
| controls.current.target.set(object.x, object.y, object.z); | |
| camera.updateProjectionMatrix(); | |
| } | |
| }) | |
| .start(); | |
| } | |
| } | |
| // if the prop changes, tween | |
| useEffect(() => { | |
| tweenLookAt(lookAt); | |
| return () => {}; | |
| }, [lookAt]); | |
| return ( | |
| <> | |
| {useTrackball ? ( | |
| <trackballControls | |
| ref={controls} | |
| args={[camera, gl.domElement]} | |
| keys={[ALT_KEY, CTRL_KEY, CMD_KEY]} | |
| // noRotate | |
| dynamicDampingFactor={0.1} | |
| /*mouseButtons={{ | |
| LEFT: THREE.MOUSE.PAN, | |
| MIDDLE: THREE.MOUSE.ZOOM, | |
| RIGHT: THREE.MOUSE.ROTATE, | |
| }}*/ | |
| /> | |
| ) : ( | |
| <orbitControls | |
| ref={controls} | |
| args={[camera, gl.domElement]} | |
| enableDamping | |
| dampingFactor={0.05} | |
| rotateSpeed={0.5} | |
| maxDistance={1000} | |
| minPolarAngle={0} | |
| maxPolarAngle={Math.PI / 2} | |
| /*mouseButtons={{ | |
| LEFT: THREE.MOUSE.PAN, | |
| MIDDLE: THREE.MOUSE.ZOOM, | |
| RIGHT: THREE.MOUSE.ROTATE, | |
| }}*/ | |
| /> | |
| )} | |
| </> | |
| ); | |
| } | |
| Controls = React.forwardRef(Controls); // eslint-disable-line no-func-assign | |
| export default Controls; |
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