最新代码

public/sdk/three/jsm/geometries/ConvexGeometry.js

@@ -0,0 +1,53 @@
+import {
+	BufferGeometry,
+	Float32BufferAttribute
+} from 'three';
+import { ConvexHull } from '../math/ConvexHull.js';
+
+class ConvexGeometry extends BufferGeometry {
+
+	constructor( points = [] ) {
+
+		super();
+
+		// buffers
+
+		const vertices = [];
+		const normals = [];
+
+		const convexHull = new ConvexHull().setFromPoints( points );
+
+		// generate vertices and normals
+
+		const faces = convexHull.faces;
+
+		for ( let i = 0; i < faces.length; i ++ ) {
+
+			const face = faces[ i ];
+			let edge = face.edge;
+
+			// we move along a doubly-connected edge list to access all face points (see HalfEdge docs)
+
+			do {
+
+				const point = edge.head().point;
+
+				vertices.push( point.x, point.y, point.z );
+				normals.push( face.normal.x, face.normal.y, face.normal.z );
+
+				edge = edge.next;
+
+			} while ( edge !== face.edge );
+
+		}
+
+		// build geometry
+
+		this.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
+		this.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
+
+	}
+
+}
+
+export { ConvexGeometry };