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85 lines
1.9 KiB
JavaScript
85 lines
1.9 KiB
JavaScript
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 addShape( color, geometry ) {
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const material = new THREE.MeshPhongMaterial( { color } );
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return new THREE.Mesh( geometry, material );
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}
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threejsLessonUtils.addDiagrams( {
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shapeCube: {
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create() {
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const width = 8;
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const height = 8;
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const depth = 8;
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return addShape( 'hsl(150,100%,40%)', new THREE.BoxGeometry( width, height, depth ) );
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},
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},
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shapeCone: {
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create() {
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const radius = 6;
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const height = 8;
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const segments = 24;
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return addShape( 'hsl(160,100%,40%)', new THREE.ConeGeometry( radius, height, segments ) );
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},
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},
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shapeCylinder: {
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create() {
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const radiusTop = 4;
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const radiusBottom = 4;
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const height = 8;
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const radialSegments = 24;
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return addShape( 'hsl(170,100%,40%)', new THREE.CylinderGeometry( radiusTop, radiusBottom, height, radialSegments ) );
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},
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},
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shapeSphere: {
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create() {
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const radius = 5;
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const widthSegments = 24;
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const heightSegments = 16;
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return addShape( 'hsl(180,100%,40%)', new THREE.SphereGeometry( radius, widthSegments, heightSegments ) );
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},
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},
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shapeFrustum: {
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create() {
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const width = 8;
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const height = 8;
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const depth = 8;
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const geometry = new THREE.BoxGeometry( width, height, depth );
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const perspMat = new THREE.Matrix4();
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perspMat.makePerspective( - 3, 3, - 3, 3, 4, 12 );
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const inMat = new THREE.Matrix4();
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inMat.makeTranslation( 0, 0, 8 );
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const mat = new THREE.Matrix4();
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mat.multiply( perspMat );
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mat.multiply( inMat );
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geometry.applyMatrix4( mat );
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geometry.computeBoundingBox();
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geometry.center();
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geometry.scale( 3, 3, 3 );
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geometry.rotateY( Math.PI );
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geometry.computeVertexNormals();
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return addShape( 'hsl(190,100%,40%)', geometry );
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},
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},
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} );
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}
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