Initial commit

HTML/ThreeJS/node_modules/three/examples/js/helpers/OctreeHelper.js

@@ -0,0 +1,74 @@
+( function () {
+
+	class OctreeHelper extends THREE.LineSegments {
+
+		constructor( octree, color = 0xffff00 ) {
+
+			const vertices = [];
+
+			function traverse( tree ) {
+
+				for ( let i = 0; i < tree.length; i ++ ) {
+
+					const min = tree[ i ].box.min;
+					const max = tree[ i ].box.max;
+					vertices.push( max.x, max.y, max.z );
+					vertices.push( min.x, max.y, max.z ); // 0, 1
+
+					vertices.push( min.x, max.y, max.z );
+					vertices.push( min.x, min.y, max.z ); // 1, 2
+
+					vertices.push( min.x, min.y, max.z );
+					vertices.push( max.x, min.y, max.z ); // 2, 3
+
+					vertices.push( max.x, min.y, max.z );
+					vertices.push( max.x, max.y, max.z ); // 3, 0
+
+					vertices.push( max.x, max.y, min.z );
+					vertices.push( min.x, max.y, min.z ); // 4, 5
+
+					vertices.push( min.x, max.y, min.z );
+					vertices.push( min.x, min.y, min.z ); // 5, 6
+
+					vertices.push( min.x, min.y, min.z );
+					vertices.push( max.x, min.y, min.z ); // 6, 7
+
+					vertices.push( max.x, min.y, min.z );
+					vertices.push( max.x, max.y, min.z ); // 7, 4
+
+					vertices.push( max.x, max.y, max.z );
+					vertices.push( max.x, max.y, min.z ); // 0, 4
+
+					vertices.push( min.x, max.y, max.z );
+					vertices.push( min.x, max.y, min.z ); // 1, 5
+
+					vertices.push( min.x, min.y, max.z );
+					vertices.push( min.x, min.y, min.z ); // 2, 6
+
+					vertices.push( max.x, min.y, max.z );
+					vertices.push( max.x, min.y, min.z ); // 3, 7
+
+					traverse( tree[ i ].subTrees );
+
+				}
+
+			}
+
+			traverse( octree.subTrees );
+			const geometry = new THREE.BufferGeometry();
+			geometry.setAttribute( 'position', new THREE.Float32BufferAttribute( vertices, 3 ) );
+			super( geometry, new THREE.LineBasicMaterial( {
+				color: color,
+				toneMapped: false
+			} ) );
+			this.octree = octree;
+			this.color = color;
+			this.type = 'OctreeHelper';
+
+		}
+
+	}
+
+	THREE.OctreeHelper = OctreeHelper;
+
+} )();