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ViewHelper: Simplified and prettified #28312

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May 8, 2024
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ViewHelper: Simplified and prettified #28312

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99 changes: 32 additions & 67 deletions examples/jsm/helpers/ViewHelper.js
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
import {
BoxGeometry,
CylinderGeometry,
CanvasTexture,
Color,
Euler,
Expand All @@ -11,6 +11,7 @@ import {
Raycaster,
Sprite,
SpriteMaterial,
SRGBColorSpace,
Vector2,
Vector3,
Vector4
Expand All @@ -27,9 +28,10 @@ class ViewHelper extends Object3D {
this.animating = false;
this.center = new Vector3();

const color1 = new Color( '#ff3653' );
const color2 = new Color( '#8adb00' );
const color3 = new Color( '#2c8fff' );
const color1 = new Color( '#ff4466' );
const color2 = new Color( '#88ff44' );
const color3 = new Color( '#4488ff' );
const color4 = new Color( '#000000' );

const interactiveObjects = [];
const raycaster = new Raycaster();
Expand All @@ -39,7 +41,7 @@ class ViewHelper extends Object3D {
const orthoCamera = new OrthographicCamera( - 2, 2, 2, - 2, 0, 4 );
orthoCamera.position.set( 0, 0, 2 );

const geometry = new BoxGeometry( 0.8, 0.05, 0.05 ).translate( 0.4, 0, 0 );
const geometry = new CylinderGeometry( 0.04, 0.04, 0.8, 5 ).rotateZ( - Math.PI / 2 ).translate( 0.4, 0, 0 );

const xAxis = new Mesh( geometry, getAxisMaterial( color1 ) );
const yAxis = new Mesh( geometry, getAxisMaterial( color2 ) );
Expand All @@ -52,28 +54,35 @@ class ViewHelper extends Object3D {
this.add( zAxis );
this.add( yAxis );

const posXAxisHelper = new Sprite( getSpriteMaterial( color1, 'X' ) );
posXAxisHelper.userData.type = 'posX';
const posYAxisHelper = new Sprite( getSpriteMaterial( color2, 'Y' ) );
posYAxisHelper.userData.type = 'posY';
const posZAxisHelper = new Sprite( getSpriteMaterial( color3, 'Z' ) );
posZAxisHelper.userData.type = 'posZ';
const negXAxisHelper = new Sprite( getSpriteMaterial( color1 ) );
negXAxisHelper.userData.type = 'negX';
const negYAxisHelper = new Sprite( getSpriteMaterial( color2 ) );
negYAxisHelper.userData.type = 'negY';
const negZAxisHelper = new Sprite( getSpriteMaterial( color3 ) );
negZAxisHelper.userData.type = 'negZ';
const spriteMaterial1 = getSpriteMaterial( color1 );
const spriteMaterial2 = getSpriteMaterial( color2 );
const spriteMaterial3 = getSpriteMaterial( color3 );
const spriteMaterial4 = getSpriteMaterial( color4 );

const posXAxisHelper = new Sprite( spriteMaterial1 );
const posYAxisHelper = new Sprite( spriteMaterial2 );
const posZAxisHelper = new Sprite( spriteMaterial3 );
const negXAxisHelper = new Sprite( spriteMaterial4 );
const negYAxisHelper = new Sprite( spriteMaterial4 );
const negZAxisHelper = new Sprite( spriteMaterial4 );

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 );

negXAxisHelper.material.opacity = 0.2;
negYAxisHelper.material.opacity = 0.2;
negZAxisHelper.material.opacity = 0.2;

posXAxisHelper.userData.type = 'posX';
posYAxisHelper.userData.type = 'posY';
posZAxisHelper.userData.type = 'posZ';
negXAxisHelper.userData.type = 'negX';
negYAxisHelper.userData.type = 'negY';
negZAxisHelper.userData.type = 'negZ';

this.add( posXAxisHelper );
this.add( posYAxisHelper );
Expand Down Expand Up @@ -101,42 +110,6 @@ class ViewHelper extends Object3D {
point.set( 0, 0, 1 );
point.applyQuaternion( camera.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 = domElement.offsetWidth - dim;
Expand Down Expand Up @@ -298,29 +271,21 @@ class ViewHelper extends Object3D {

}

function getSpriteMaterial( color, text = null ) {
function getSpriteMaterial( color ) {

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.arc( 32, 32, 14, 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 CanvasTexture( canvas );
texture.colorSpace = SRGBColorSpace;

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

Expand Down
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