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add ViewHelper to examples
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@sunag
sunag committed Feb 17, 2022
1 parent c7d2bb2 commit 9a6f817
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Showing 2 changed files with 300 additions and 282 deletions.
287 changes: 5 additions & 282 deletions editor/js/Viewport.ViewHelper.js
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Original file line number Diff line number Diff line change
@@ -1,15 +1,12 @@
import { UIPanel } from './libs/ui.js';

import * as THREE from 'three';
import { ViewHelper as ViewHelperBase } from '../../examples/jsm/helpers/ViewHelper.js';

class ViewHelper extends THREE.Object3D {
class ViewHelper extends ViewHelperBase {

constructor( editorCamera, container ) {

super();

this.animating = false;
this.controls = null;
super( editorCamera, container.dom );

const panel = new UIPanel();
panel.setId( 'viewHelper' );
Expand All @@ -19,13 +16,11 @@ class ViewHelper extends THREE.Object3D {
panel.setHeight( '128px' );
panel.setWidth( '128px' );

const scope = this;

panel.dom.addEventListener( 'pointerup', function ( event ) {
panel.dom.addEventListener( 'pointerup', ( event ) => {

event.stopPropagation();

scope.handleClick( event );
this.handleClick( event );

} );

Expand All @@ -37,280 +32,8 @@ class ViewHelper extends THREE.Object3D {

container.add( panel );

const color1 = new THREE.Color( '#ff3653' );
const color2 = new THREE.Color( '#8adb00' );
const color3 = new THREE.Color( '#2c8fff' );

const interactiveObjects = [];
const raycaster = new THREE.Raycaster();
const mouse = new THREE.Vector2();
const dummy = new THREE.Object3D();

const camera = new THREE.OrthographicCamera( - 2, 2, 2, - 2, 0, 4 );
camera.position.set( 0, 0, 2 );

const geometry = new THREE.BoxGeometry( 0.8, 0.05, 0.05 ).translate( 0.4, 0, 0 );

const xAxis = new THREE.Mesh( geometry, getAxisMaterial( color1 ) );
const yAxis = new THREE.Mesh( geometry, getAxisMaterial( color2 ) );
const zAxis = new THREE.Mesh( geometry, getAxisMaterial( color3 ) );

yAxis.rotation.z = Math.PI / 2;
zAxis.rotation.y = - Math.PI / 2;

this.add( xAxis );
this.add( zAxis );
this.add( yAxis );

const posXAxisHelper = new THREE.Sprite( getSpriteMaterial( color1, 'X' ) );
posXAxisHelper.userData.type = 'posX';
const posYAxisHelper = new THREE.Sprite( getSpriteMaterial( color2, 'Y' ) );
posYAxisHelper.userData.type = 'posY';
const posZAxisHelper = new THREE.Sprite( getSpriteMaterial( color3, 'Z' ) );
posZAxisHelper.userData.type = 'posZ';
const negXAxisHelper = new THREE.Sprite( getSpriteMaterial( color1 ) );
negXAxisHelper.userData.type = 'negX';
const negYAxisHelper = new THREE.Sprite( getSpriteMaterial( color2 ) );
negYAxisHelper.userData.type = 'negY';
const negZAxisHelper = new THREE.Sprite( getSpriteMaterial( color3 ) );
negZAxisHelper.userData.type = 'negZ';

posXAxisHelper.position.x = 1;
posYAxisHelper.position.y = 1;
posZAxisHelper.position.z = 1;
negXAxisHelper.position.x = - 1;
negXAxisHelper.scale.setScalar( 0.8 );
negYAxisHelper.position.y = - 1;
negYAxisHelper.scale.setScalar( 0.8 );
negZAxisHelper.position.z = - 1;
negZAxisHelper.scale.setScalar( 0.8 );

this.add( posXAxisHelper );
this.add( posYAxisHelper );
this.add( posZAxisHelper );
this.add( negXAxisHelper );
this.add( negYAxisHelper );
this.add( negZAxisHelper );

interactiveObjects.push( posXAxisHelper );
interactiveObjects.push( posYAxisHelper );
interactiveObjects.push( posZAxisHelper );
interactiveObjects.push( negXAxisHelper );
interactiveObjects.push( negYAxisHelper );
interactiveObjects.push( negZAxisHelper );

const point = new THREE.Vector3();
const dim = 128;
const turnRate = 2 * Math.PI; // turn rate in angles per second

this.render = function ( renderer ) {

this.quaternion.copy( editorCamera.quaternion ).invert();
this.updateMatrixWorld();

point.set( 0, 0, 1 );
point.applyQuaternion( editorCamera.quaternion );

if ( point.x >= 0 ) {

posXAxisHelper.material.opacity = 1;
negXAxisHelper.material.opacity = 0.5;

} else {

posXAxisHelper.material.opacity = 0.5;
negXAxisHelper.material.opacity = 1;

}

if ( point.y >= 0 ) {

posYAxisHelper.material.opacity = 1;
negYAxisHelper.material.opacity = 0.5;

} else {

posYAxisHelper.material.opacity = 0.5;
negYAxisHelper.material.opacity = 1;

}

if ( point.z >= 0 ) {

posZAxisHelper.material.opacity = 1;
negZAxisHelper.material.opacity = 0.5;

} else {

posZAxisHelper.material.opacity = 0.5;
negZAxisHelper.material.opacity = 1;

}

//

const x = container.dom.offsetWidth - dim;

renderer.clearDepth();
renderer.setViewport( x, 0, dim, dim );
renderer.render( this, camera );

};

const targetPosition = new THREE.Vector3();
const targetQuaternion = new THREE.Quaternion();

const q1 = new THREE.Quaternion();
const q2 = new THREE.Quaternion();
let radius = 0;

this.handleClick = function ( event ) {

if ( this.animating === true ) return false;

const rect = container.dom.getBoundingClientRect();
const offsetX = rect.left + ( container.dom.offsetWidth - dim );
const offsetY = rect.top + ( container.dom.offsetHeight - dim );
mouse.x = ( ( event.clientX - offsetX ) / ( rect.width - offsetX ) ) * 2 - 1;
mouse.y = - ( ( event.clientY - offsetY ) / ( rect.bottom - offsetY ) ) * 2 + 1;

raycaster.setFromCamera( mouse, camera );

const intersects = raycaster.intersectObjects( interactiveObjects );

if ( intersects.length > 0 ) {

const intersection = intersects[ 0 ];
const object = intersection.object;

prepareAnimationData( object, this.controls.center );

this.animating = true;

return true;

} else {

return false;

}

};

this.update = function ( delta ) {

const step = delta * turnRate;
const focusPoint = this.controls.center;

// animate position by doing a slerp and then scaling the position on the unit sphere

q1.rotateTowards( q2, step );
editorCamera.position.set( 0, 0, 1 ).applyQuaternion( q1 ).multiplyScalar( radius ).add( focusPoint );

// animate orientation

editorCamera.quaternion.rotateTowards( targetQuaternion, step );

if ( q1.angleTo( q2 ) === 0 ) {

this.animating = false;

}

};

function prepareAnimationData( object, focusPoint ) {

switch ( object.userData.type ) {

case 'posX':
targetPosition.set( 1, 0, 0 );
targetQuaternion.setFromEuler( new THREE.Euler( 0, Math.PI * 0.5, 0 ) );
break;

case 'posY':
targetPosition.set( 0, 1, 0 );
targetQuaternion.setFromEuler( new THREE.Euler( - Math.PI * 0.5, 0, 0 ) );
break;

case 'posZ':
targetPosition.set( 0, 0, 1 );
targetQuaternion.setFromEuler( new THREE.Euler() );
break;

case 'negX':
targetPosition.set( - 1, 0, 0 );
targetQuaternion.setFromEuler( new THREE.Euler( 0, - Math.PI * 0.5, 0 ) );
break;

case 'negY':
targetPosition.set( 0, - 1, 0 );
targetQuaternion.setFromEuler( new THREE.Euler( Math.PI * 0.5, 0, 0 ) );
break;

case 'negZ':
targetPosition.set( 0, 0, - 1 );
targetQuaternion.setFromEuler( new THREE.Euler( 0, Math.PI, 0 ) );
break;

default:
console.error( 'ViewHelper: Invalid axis.' );

}

//

radius = editorCamera.position.distanceTo( focusPoint );
targetPosition.multiplyScalar( radius ).add( focusPoint );

dummy.position.copy( focusPoint );

dummy.lookAt( editorCamera.position );
q1.copy( dummy.quaternion );

dummy.lookAt( targetPosition );
q2.copy( dummy.quaternion );

}

function getAxisMaterial( color ) {

return new THREE.MeshBasicMaterial( { color: color, toneMapped: false } );

}

function getSpriteMaterial( color, text = null ) {

const canvas = document.createElement( 'canvas' );
canvas.width = 64;
canvas.height = 64;

const context = canvas.getContext( '2d' );
context.beginPath();
context.arc( 32, 32, 16, 0, 2 * Math.PI );
context.closePath();
context.fillStyle = color.getStyle();
context.fill();

if ( text !== null ) {

context.font = '24px Arial';
context.textAlign = 'center';
context.fillStyle = '#000000';
context.fillText( text, 32, 41 );

}

const texture = new THREE.CanvasTexture( canvas );

return new THREE.SpriteMaterial( { map: texture, toneMapped: false } );

}

}

}

ViewHelper.prototype.isViewHelper = true;

export { ViewHelper };
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