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426 lines
9.0 KiB
JavaScript
426 lines
9.0 KiB
JavaScript
2 months ago
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import * as THREE from 'three';
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import { threejsLessonUtils } from './threejs-lesson-utils.js';
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{
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function makeSphere( widthDivisions, heightDivisions ) {
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const radius = 7;
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return new THREE.SphereGeometry( radius, widthDivisions, heightDivisions );
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}
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const highPolySphereGeometry = function () {
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const widthDivisions = 100;
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const heightDivisions = 50;
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return makeSphere( widthDivisions, heightDivisions );
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}();
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const lowPolySphereGeometry = function () {
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const widthDivisions = 12;
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const heightDivisions = 9;
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return makeSphere( widthDivisions, heightDivisions );
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}();
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function smoothOrFlat( flatShading, radius = 7 ) {
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const widthDivisions = 12;
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const heightDivisions = 9;
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const geometry = new THREE.SphereGeometry( radius, widthDivisions, heightDivisions );
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const material = new THREE.MeshPhongMaterial( {
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flatShading,
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color: 'hsl(300,50%,50%)',
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} );
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return new THREE.Mesh( geometry, material );
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}
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function basicLambertPhongExample( MaterialCtor, lowPoly, params = {} ) {
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const geometry = lowPoly ? lowPolySphereGeometry : highPolySphereGeometry;
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const material = new MaterialCtor( {
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color: 'hsl(210,50%,50%)',
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...params,
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} );
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return {
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obj3D: new THREE.Mesh( geometry, material ),
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trackball: lowPoly,
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};
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}
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function sideExample( side ) {
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const base = new THREE.Object3D();
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const size = 6;
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const geometry = new THREE.PlaneGeometry( size, size );
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[
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{ position: [ - 1, 0, 0 ], up: [ 0, 1, 0 ], },
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{ position: [ 1, 0, 0 ], up: [ 0, - 1, 0 ], },
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{ position: [ 0, - 1, 0 ], up: [ 0, 0, - 1 ], },
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{ position: [ 0, 1, 0 ], up: [ 0, 0, 1 ], },
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{ position: [ 0, 0, - 1 ], up: [ 1, 0, 0 ], },
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{ position: [ 0, 0, 1 ], up: [ - 1, 0, 0 ], },
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].forEach( ( settings, ndx ) => {
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const material = new THREE.MeshBasicMaterial( { side } );
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material.color.setHSL( ndx / 6, .5, .5 );
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const mesh = new THREE.Mesh( geometry, material );
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mesh.up.set( ...settings.up );
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mesh.lookAt( ...settings.position );
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mesh.position.set( ...settings.position ).multiplyScalar( size * .75 );
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base.add( mesh );
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} );
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return base;
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}
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function makeStandardPhysicalMaterialGrid( elem, physical, update ) {
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const numMetal = 5;
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const numRough = 7;
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const meshes = [];
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const MatCtor = physical ? THREE.MeshPhysicalMaterial : THREE.MeshStandardMaterial;
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const color = physical ? 'hsl(160,50%,50%)' : 'hsl(140,50%,50%)';
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for ( let m = 0; m < numMetal; ++ m ) {
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const row = [];
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for ( let r = 0; r < numRough; ++ r ) {
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const material = new MatCtor( {
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color,
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roughness: r / ( numRough - 1 ),
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metalness: 1 - m / ( numMetal - 1 ),
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} );
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const mesh = new THREE.Mesh( highPolySphereGeometry, material );
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row.push( mesh );
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}
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meshes.push( row );
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}
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return {
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obj3D: null,
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trackball: false,
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render( renderInfo ) {
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const { camera, scene, renderer } = renderInfo;
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const rect = elem.getBoundingClientRect();
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const width = ( rect.right - rect.left ) * renderInfo.pixelRatio;
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const height = ( rect.bottom - rect.top ) * renderInfo.pixelRatio;
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const left = rect.left * renderInfo.pixelRatio;
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const bottom = ( renderer.domElement.clientHeight - rect.bottom ) * renderInfo.pixelRatio;
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const cellSize = Math.min( width / numRough, height / numMetal ) | 0;
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const xOff = ( width - cellSize * numRough ) / 2;
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const yOff = ( height - cellSize * numMetal ) / 2;
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camera.aspect = 1;
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camera.updateProjectionMatrix();
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if ( update ) {
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update( meshes );
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}
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for ( let m = 0; m < numMetal; ++ m ) {
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for ( let r = 0; r < numRough; ++ r ) {
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const x = left + xOff + r * cellSize;
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const y = bottom + yOff + m * cellSize;
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renderer.setViewport( x, y, cellSize, cellSize );
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renderer.setScissor( x, y, cellSize, cellSize );
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const mesh = meshes[ m ][ r ];
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scene.add( mesh );
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renderer.render( scene, camera );
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scene.remove( mesh );
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}
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}
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},
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};
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}
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threejsLessonUtils.addDiagrams( {
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smoothShading: {
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create() {
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return smoothOrFlat( false );
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},
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},
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flatShading: {
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create() {
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return smoothOrFlat( true );
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},
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},
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MeshBasicMaterial: {
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create() {
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return basicLambertPhongExample( THREE.MeshBasicMaterial );
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},
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},
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MeshLambertMaterial: {
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create() {
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return basicLambertPhongExample( THREE.MeshLambertMaterial );
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},
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},
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MeshPhongMaterial: {
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create() {
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return basicLambertPhongExample( THREE.MeshPhongMaterial );
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},
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},
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MeshBasicMaterialLowPoly: {
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create() {
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return basicLambertPhongExample( THREE.MeshBasicMaterial, true );
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},
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},
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MeshLambertMaterialLowPoly: {
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create() {
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return basicLambertPhongExample( THREE.MeshLambertMaterial, true );
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},
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},
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MeshPhongMaterialLowPoly: {
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create() {
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return basicLambertPhongExample( THREE.MeshPhongMaterial, true );
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},
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},
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MeshPhongMaterialShininess0: {
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create() {
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return basicLambertPhongExample( THREE.MeshPhongMaterial, false, {
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color: 'red',
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shininess: 0,
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} );
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},
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},
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MeshPhongMaterialShininess30: {
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create() {
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return basicLambertPhongExample( THREE.MeshPhongMaterial, false, {
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color: 'red',
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shininess: 30,
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} );
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},
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},
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MeshPhongMaterialShininess150: {
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create() {
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return basicLambertPhongExample( THREE.MeshPhongMaterial, false, {
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color: 'red',
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shininess: 150,
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} );
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},
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},
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MeshBasicMaterialCompare: {
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create() {
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return basicLambertPhongExample( THREE.MeshBasicMaterial, false, {
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color: 'purple',
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} );
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},
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},
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MeshLambertMaterialCompare: {
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create() {
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return basicLambertPhongExample( THREE.MeshLambertMaterial, false, {
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color: 'black',
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emissive: 'purple',
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} );
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},
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},
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MeshPhongMaterialCompare: {
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create() {
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return basicLambertPhongExample( THREE.MeshPhongMaterial, false, {
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color: 'black',
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emissive: 'purple',
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shininess: 0,
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} );
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},
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},
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MeshToonMaterial: {
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create() {
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return basicLambertPhongExample( THREE.MeshToonMaterial );
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},
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},
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MeshStandardMaterial: {
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create( props ) {
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return makeStandardPhysicalMaterialGrid( props.renderInfo.elem, false );
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},
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},
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MeshPhysicalMaterial: {
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create( props ) {
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const settings = {
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clearcoat: .5,
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clearcoatRoughness: 0,
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};
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function addElem( parent, type, style = {} ) {
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const elem = document.createElement( type );
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Object.assign( elem.style, style );
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parent.appendChild( elem );
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return elem;
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}
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function addRange( elem, obj, prop, min, max ) {
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const outer = addElem( elem, 'div', {
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width: '100%',
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textAlign: 'center',
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'font-family': 'monospace',
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} );
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const div = addElem( outer, 'div', {
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textAlign: 'left',
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display: 'inline-block',
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} );
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const label = addElem( div, 'label', {
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display: 'inline-block',
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width: '12em',
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} );
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label.textContent = prop;
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const num = addElem( div, 'div', {
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display: 'inline-block',
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width: '3em',
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} );
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function updateNum() {
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num.textContent = obj[ prop ].toFixed( 2 );
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}
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updateNum();
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const input = addElem( div, 'input', {
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} );
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Object.assign( input, {
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type: 'range',
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min: 0,
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max: 100,
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value: ( obj[ prop ] - min ) / ( max - min ) * 100,
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} );
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input.addEventListener( 'input', () => {
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obj[ prop ] = min + ( max - min ) * input.value / 100;
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updateNum();
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} );
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}
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const { elem } = props.renderInfo;
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addRange( elem, settings, 'clearcoat', 0, 1 );
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addRange( elem, settings, 'clearcoatRoughness', 0, 1 );
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const area = addElem( elem, 'div', {
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width: '100%',
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height: '400px',
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} );
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return makeStandardPhysicalMaterialGrid( area, true, ( meshes ) => {
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meshes.forEach( row => row.forEach( mesh => {
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mesh.material.clearcoat = settings.clearcoat;
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mesh.material.clearcoatRoughness = settings.clearcoatRoughness;
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} ) );
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} );
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},
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},
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MeshDepthMaterial: {
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create( props ) {
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const { camera } = props;
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const radius = 4;
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const tube = 1.5;
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const radialSegments = 8;
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const tubularSegments = 64;
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const p = 2;
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const q = 3;
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const geometry = new THREE.TorusKnotGeometry( radius, tube, tubularSegments, radialSegments, p, q );
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const material = new THREE.MeshDepthMaterial();
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camera.near = 7;
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camera.far = 20;
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return new THREE.Mesh( geometry, material );
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},
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},
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MeshNormalMaterial: {
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create() {
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const radius = 4;
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const tube = 1.5;
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const radialSegments = 8;
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const tubularSegments = 64;
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const p = 2;
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const q = 3;
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const geometry = new THREE.TorusKnotGeometry( radius, tube, tubularSegments, radialSegments, p, q );
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const material = new THREE.MeshNormalMaterial();
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return new THREE.Mesh( geometry, material );
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},
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},
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sideDefault: {
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create() {
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return sideExample( THREE.FrontSide );
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},
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},
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sideDouble: {
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create() {
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return sideExample( THREE.DoubleSide );
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},
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},
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} );
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}
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