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three

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JavaScript 3D library

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console.warn( "THREE.SelectionBox: As part of the transition to ES6 Modules, the files in 'examples/js' were deprecated in May 2020 (r117) and will be deleted in December 2020 (r124). You can find more information about developing using ES6 Modules in https://threejs.org/docs/#manual/en/introduction/Installation." ); /** * 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; } )();