first app vibe

app/node_modules/three/src/objects/Line.js

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+import { Sphere } from '../math/Sphere.js';
+import { Ray } from '../math/Ray.js';
+import { Matrix4 } from '../math/Matrix4.js';
+import { Object3D } from '../core/Object3D.js';
+import { Vector3 } from '../math/Vector3.js';
+import { LineBasicMaterial } from '../materials/LineBasicMaterial.js';
+import { BufferGeometry } from '../core/BufferGeometry.js';
+import { Float32BufferAttribute } from '../core/BufferAttribute.js';
+
+const _vStart = /*@__PURE__*/ new Vector3();
+const _vEnd = /*@__PURE__*/ new Vector3();
+
+const _inverseMatrix = /*@__PURE__*/ new Matrix4();
+const _ray = /*@__PURE__*/ new Ray();
+const _sphere = /*@__PURE__*/ new Sphere();
+
+const _intersectPointOnRay = /*@__PURE__*/ new Vector3();
+const _intersectPointOnSegment = /*@__PURE__*/ new Vector3();
+
+/**
+ * A continuous line. The line are rendered by connecting consecutive
+ * vertices with straight lines.
+ *
+ * ```js
+ * const material = new THREE.LineBasicMaterial( { color: 0x0000ff } );
+ *
+ * const points = [];
+ * points.push( new THREE.Vector3( - 10, 0, 0 ) );
+ * points.push( new THREE.Vector3( 0, 10, 0 ) );
+ * points.push( new THREE.Vector3( 10, 0, 0 ) );
+ *
+ * const geometry = new THREE.BufferGeometry().setFromPoints( points );
+ *
+ * const line = new THREE.Line( geometry, material );
+ * scene.add( line );
+ * ```
+ *
+ * @augments Object3D
+ */
+class Line extends Object3D {
+
+	/**
+	 * Constructs a new line.
+	 *
+	 * @param {BufferGeometry} [geometry] - The line geometry.
+	 * @param {Material|Array<Material>} [material] - The line material.
+	 */
+	constructor( geometry = new BufferGeometry(), material = new LineBasicMaterial() ) {
+
+		super();
+
+		/**
+		 * This flag can be used for type testing.
+		 *
+		 * @type {boolean}
+		 * @readonly
+		 * @default true
+		 */
+		this.isLine = true;
+
+		this.type = 'Line';
+
+		/**
+		 * The line geometry.
+		 *
+		 * @type {BufferGeometry}
+		 */
+		this.geometry = geometry;
+
+		/**
+		 * The line material.
+		 *
+		 * @type {Material|Array<Material>}
+		 * @default LineBasicMaterial
+		 */
+		this.material = material;
+
+		/**
+		 * A dictionary representing the morph targets in the geometry. The key is the
+		 * morph targets name, the value its attribute index. This member is `undefined`
+		 * by default and only set when morph targets are detected in the geometry.
+		 *
+		 * @type {Object<String,number>|undefined}
+		 * @default undefined
+		 */
+		this.morphTargetDictionary = undefined;
+
+		/**
+		 * An array of weights typically in the range `[0,1]` that specify how much of the morph
+		 * is applied. This member is `undefined` by default and only set when morph targets are
+		 * detected in the geometry.
+		 *
+		 * @type {Array<number>|undefined}
+		 * @default undefined
+		 */
+		this.morphTargetInfluences = undefined;
+
+		this.updateMorphTargets();
+
+	}
+
+	copy( source, recursive ) {
+
+		super.copy( source, recursive );
+
+		this.material = Array.isArray( source.material ) ? source.material.slice() : source.material;
+		this.geometry = source.geometry;
+
+		return this;
+
+	}
+
+	/**
+	 * Computes an array of distance values which are necessary for rendering dashed lines.
+	 * For each vertex in the geometry, the method calculates the cumulative length from the
+	 * current point to the very beginning of the line.
+	 *
+	 * @return {Line} A reference to this line.
+	 */
+	computeLineDistances() {
+
+		const geometry = this.geometry;
+
+		// we assume non-indexed geometry
+
+		if ( geometry.index === null ) {
+
+			const positionAttribute = geometry.attributes.position;
+			const lineDistances = [ 0 ];
+
+			for ( let i = 1, l = positionAttribute.count; i < l; i ++ ) {
+
+				_vStart.fromBufferAttribute( positionAttribute, i - 1 );
+				_vEnd.fromBufferAttribute( positionAttribute, i );
+
+				lineDistances[ i ] = lineDistances[ i - 1 ];
+				lineDistances[ i ] += _vStart.distanceTo( _vEnd );
+
+			}
+
+			geometry.setAttribute( 'lineDistance', new Float32BufferAttribute( lineDistances, 1 ) );
+
+		} else {
+
+			console.warn( 'THREE.Line.computeLineDistances(): Computation only possible with non-indexed BufferGeometry.' );
+
+		}
+
+		return this;
+
+	}
+
+	/**
+	 * Computes intersection points between a casted ray and this line.
+	 *
+	 * @param {Raycaster} raycaster - The raycaster.
+	 * @param {Array<Object>} intersects - The target array that holds the intersection points.
+	 */
+	raycast( raycaster, intersects ) {
+
+		const geometry = this.geometry;
+		const matrixWorld = this.matrixWorld;
+		const threshold = raycaster.params.Line.threshold;
+		const drawRange = geometry.drawRange;
+
+		// Checking boundingSphere distance to ray
+
+		if ( geometry.boundingSphere === null ) geometry.computeBoundingSphere();
+
+		_sphere.copy( geometry.boundingSphere );
+		_sphere.applyMatrix4( matrixWorld );
+		_sphere.radius += threshold;
+
+		if ( raycaster.ray.intersectsSphere( _sphere ) === false ) return;
+
+		//
+
+		_inverseMatrix.copy( matrixWorld ).invert();
+		_ray.copy( raycaster.ray ).applyMatrix4( _inverseMatrix );
+
+		const localThreshold = threshold / ( ( this.scale.x + this.scale.y + this.scale.z ) / 3 );
+		const localThresholdSq = localThreshold * localThreshold;
+
+		const step = this.isLineSegments ? 2 : 1;
+
+		const index = geometry.index;
+		const attributes = geometry.attributes;
+		const positionAttribute = attributes.position;
+
+		if ( index !== null ) {
+
+			const start = Math.max( 0, drawRange.start );
+			const end = Math.min( index.count, ( drawRange.start + drawRange.count ) );
+
+			for ( let i = start, l = end - 1; i < l; i += step ) {
+
+				const a = index.getX( i );
+				const b = index.getX( i + 1 );
+
+				const intersect = checkIntersection( this, raycaster, _ray, localThresholdSq, a, b, i );
+
+				if ( intersect ) {
+
+					intersects.push( intersect );
+
+				}
+
+			}
+
+			if ( this.isLineLoop ) {
+
+				const a = index.getX( end - 1 );
+				const b = index.getX( start );
+
+				const intersect = checkIntersection( this, raycaster, _ray, localThresholdSq, a, b, end - 1 );
+
+				if ( intersect ) {
+
+					intersects.push( intersect );
+
+				}
+
+			}
+
+		} else {
+
+			const start = Math.max( 0, drawRange.start );
+			const end = Math.min( positionAttribute.count, ( drawRange.start + drawRange.count ) );
+
+			for ( let i = start, l = end - 1; i < l; i += step ) {
+
+				const intersect = checkIntersection( this, raycaster, _ray, localThresholdSq, i, i + 1, i );
+
+				if ( intersect ) {
+
+					intersects.push( intersect );
+
+				}
+
+			}
+
+			if ( this.isLineLoop ) {
+
+				const intersect = checkIntersection( this, raycaster, _ray, localThresholdSq, end - 1, start, end - 1 );
+
+				if ( intersect ) {
+
+					intersects.push( intersect );
+
+				}
+
+			}
+
+		}
+
+	}
+
+	/**
+	 * Sets the values of {@link Line#morphTargetDictionary} and {@link Line#morphTargetInfluences}
+	 * to make sure existing morph targets can influence this 3D object.
+	 */
+	updateMorphTargets() {
+
+		const geometry = this.geometry;
+
+		const morphAttributes = geometry.morphAttributes;
+		const keys = Object.keys( morphAttributes );
+
+		if ( keys.length > 0 ) {
+
+			const morphAttribute = morphAttributes[ keys[ 0 ] ];
+
+			if ( morphAttribute !== undefined ) {
+
+				this.morphTargetInfluences = [];
+				this.morphTargetDictionary = {};
+
+				for ( let m = 0, ml = morphAttribute.length; m < ml; m ++ ) {
+
+					const name = morphAttribute[ m ].name || String( m );
+
+					this.morphTargetInfluences.push( 0 );
+					this.morphTargetDictionary[ name ] = m;
+
+				}
+
+			}
+
+		}
+
+	}
+
+}
+
+function checkIntersection( object, raycaster, ray, thresholdSq, a, b, i ) {
+
+	const positionAttribute = object.geometry.attributes.position;
+
+	_vStart.fromBufferAttribute( positionAttribute, a );
+	_vEnd.fromBufferAttribute( positionAttribute, b );
+
+	const distSq = ray.distanceSqToSegment( _vStart, _vEnd, _intersectPointOnRay, _intersectPointOnSegment );
+
+	if ( distSq > thresholdSq ) return;
+
+	_intersectPointOnRay.applyMatrix4( object.matrixWorld ); // Move back to world space for distance calculation
+
+	const distance = raycaster.ray.origin.distanceTo( _intersectPointOnRay );
+
+	if ( distance < raycaster.near || distance > raycaster.far ) return;
+
+	return {
+
+		distance: distance,
+		// What do we want? intersection point on the ray or on the segment??
+		// point: raycaster.ray.at( distance ),
+		point: _intersectPointOnSegment.clone().applyMatrix4( object.matrixWorld ),
+		index: i,
+		face: null,
+		faceIndex: null,
+		barycoord: null,
+		object: object
+
+	};
+
+}
+
+export { Line };