https://github.com/WWBN/AVideo/issues/8713

node_modules/three/examples/js/interactive/SelectionBox.js

@@ -0,0 +1,197 @@
+/**
+ * This is a class to check whether objects are in a selection area in 3D space
+ */
+
+THREE.SelectionBox = ( function () {
+
+	var frustum = new THREE.Frustum();
+	var center = new THREE.Vector3();
+
+	var tmpPoint = new THREE.Vector3();
+
+	var vecNear = new THREE.Vector3();
+	var vecTopLeft = new THREE.Vector3();
+	var vecTopRight = new THREE.Vector3();
+	var vecDownRight = new THREE.Vector3();
+	var vecDownLeft = new THREE.Vector3();
+
+	var vecFarTopLeft = new THREE.Vector3();
+	var vecFarTopRight = new THREE.Vector3();
+	var vecFarDownRight = new THREE.Vector3();
+	var vecFarDownLeft = new THREE.Vector3();
+
+	var vectemp1 = new THREE.Vector3();
+	var vectemp2 = new THREE.Vector3();
+	var vectemp3 = new THREE.Vector3();
+
+	function SelectionBox( camera, scene, deep ) {
+
+		this.camera = camera;
+		this.scene = scene;
+		this.startPoint = new THREE.Vector3();
+		this.endPoint = new THREE.Vector3();
+		this.collection = [];
+		this.deep = deep || Number.MAX_VALUE;
+
+	}
+
+	SelectionBox.prototype.select = function ( startPoint, endPoint ) {
+
+		this.startPoint = startPoint || this.startPoint;
+		this.endPoint = endPoint || this.endPoint;
+		this.collection = [];
+
+		this.updateFrustum( this.startPoint, this.endPoint );
+		this.searchChildInFrustum( frustum, this.scene );
+
+		return this.collection;
+
+	};
+
+	SelectionBox.prototype.updateFrustum = function ( startPoint, endPoint ) {
+
+		startPoint = startPoint || this.startPoint;
+		endPoint = endPoint || this.endPoint;
+
+		// Avoid invalid frustum
+
+		if ( startPoint.x === endPoint.x ) {
+
+			endPoint.x += Number.EPSILON;
+
+		}
+
+		if ( startPoint.y === endPoint.y ) {
+
+			endPoint.y += Number.EPSILON;
+
+		}
+
+		this.camera.updateProjectionMatrix();
+		this.camera.updateMatrixWorld();
+
+		if ( this.camera.isPerspectiveCamera ) {
+
+			tmpPoint.copy( startPoint );
+			tmpPoint.x = Math.min( startPoint.x, endPoint.x );
+			tmpPoint.y = Math.max( startPoint.y, endPoint.y );
+			endPoint.x = Math.max( startPoint.x, endPoint.x );
+			endPoint.y = Math.min( startPoint.y, endPoint.y );
+
+			vecNear.setFromMatrixPosition( this.camera.matrixWorld );
+			vecTopLeft.copy( tmpPoint );
+			vecTopRight.set( endPoint.x, tmpPoint.y, 0 );
+			vecDownRight.copy( endPoint );
+			vecDownLeft.set( tmpPoint.x, endPoint.y, 0 );
+
+			vecTopLeft.unproject( this.camera );
+			vecTopRight.unproject( this.camera );
+			vecDownRight.unproject( this.camera );
+			vecDownLeft.unproject( this.camera );
+
+			vectemp1.copy( vecTopLeft ).sub( vecNear );
+			vectemp2.copy( vecTopRight ).sub( vecNear );
+			vectemp3.copy( vecDownRight ).sub( vecNear );
+			vectemp1.normalize();
+			vectemp2.normalize();
+			vectemp3.normalize();
+
+			vectemp1.multiplyScalar( this.deep );
+			vectemp2.multiplyScalar( this.deep );
+			vectemp3.multiplyScalar( this.deep );
+			vectemp1.add( vecNear );
+			vectemp2.add( vecNear );
+			vectemp3.add( vecNear );
+
+			var planes = frustum.planes;
+
+			planes[ 0 ].setFromCoplanarPoints( vecNear, vecTopLeft, vecTopRight );
+			planes[ 1 ].setFromCoplanarPoints( vecNear, vecTopRight, vecDownRight );
+			planes[ 2 ].setFromCoplanarPoints( vecDownRight, vecDownLeft, vecNear );
+			planes[ 3 ].setFromCoplanarPoints( vecDownLeft, vecTopLeft, vecNear );
+			planes[ 4 ].setFromCoplanarPoints( vecTopRight, vecDownRight, vecDownLeft );
+			planes[ 5 ].setFromCoplanarPoints( vectemp3, vectemp2, vectemp1 );
+			planes[ 5 ].normal.multiplyScalar( - 1 );
+
+		} else if ( this.camera.isOrthographicCamera ) {
+
+			var left = Math.min( startPoint.x, endPoint.x );
+			var top = Math.max( startPoint.y, endPoint.y );
+			var right = Math.max( startPoint.x, endPoint.x );
+			var down = Math.min( startPoint.y, endPoint.y );
+
+			vecTopLeft.set( left, top, - 1 );
+			vecTopRight.set( right, top, - 1 );
+			vecDownRight.set( right, down, - 1 );
+			vecDownLeft.set( left, down, - 1 );
+
+			vecFarTopLeft.set( left, top, 1 );
+			vecFarTopRight.set( right, top, 1 );
+			vecFarDownRight.set( right, down, 1 );
+			vecFarDownLeft.set( left, down, 1 );
+
+			vecTopLeft.unproject( this.camera );
+			vecTopRight.unproject( this.camera );
+			vecDownRight.unproject( this.camera );
+			vecDownLeft.unproject( this.camera );
+
+			vecFarTopLeft.unproject( this.camera );
+			vecFarTopRight.unproject( this.camera );
+			vecFarDownRight.unproject( this.camera );
+			vecFarDownLeft.unproject( this.camera );
+
+			var planes = frustum.planes;
+
+			planes[ 0 ].setFromCoplanarPoints( vecTopLeft, vecFarTopLeft, vecFarTopRight );
+			planes[ 1 ].setFromCoplanarPoints( vecTopRight, vecFarTopRight, vecFarDownRight );
+			planes[ 2 ].setFromCoplanarPoints( vecFarDownRight, vecFarDownLeft, vecDownLeft );
+			planes[ 3 ].setFromCoplanarPoints( vecFarDownLeft, vecFarTopLeft, vecTopLeft );
+			planes[ 4 ].setFromCoplanarPoints( vecTopRight, vecDownRight, vecDownLeft );
+			planes[ 5 ].setFromCoplanarPoints( vecFarDownRight, vecFarTopRight, vecFarTopLeft );
+			planes[ 5 ].normal.multiplyScalar( - 1 );
+
+		} else {
+
+			console.error( 'THREE.SelectionBox: Unsupported camera type.' );
+
+		}
+
+	};
+
+	SelectionBox.prototype.searchChildInFrustum = function ( frustum, object ) {
+
+		if ( object.isMesh || object.isLine || object.isPoints ) {
+
+			if ( object.material !== undefined ) {
+
+				if ( object.geometry.boundingSphere === null ) object.geometry.computeBoundingSphere();
+
+				center.copy( object.geometry.boundingSphere.center );
+
+				center.applyMatrix4( object.matrixWorld );
+
+				if ( frustum.containsPoint( center ) ) {
+
+					this.collection.push( object );
+
+				}
+
+			}
+
+		}
+
+		if ( object.children.length > 0 ) {
+
+			for ( var x = 0; x < object.children.length; x ++ ) {
+
+				this.searchChildInFrustum( frustum, object.children[ x ] );
+
+			}
+
+		}
+
+	};
+
+	return SelectionBox;
+
+} )();