feat: initialize project with core dependencies and game entry point

node_modules/three/examples/jsm/lines/LineSegmentsGeometry.js

@@ -0,0 +1,298 @@
+import {
+	Box3,
+	Float32BufferAttribute,
+	InstancedBufferGeometry,
+	InstancedInterleavedBuffer,
+	InterleavedBufferAttribute,
+	Sphere,
+	Vector3,
+	WireframeGeometry
+} from 'three';
+
+const _box = new Box3();
+const _vector = new Vector3();
+
+/**
+ * A series of vertex pairs, forming line segments.
+ *
+ * This is used in {@link LineSegments2} to describe the shape.
+ *
+ * @augments InstancedBufferGeometry
+ * @three_import import { LineSegmentsGeometry } from 'three/addons/lines/LineSegmentsGeometry.js';
+ */
+class LineSegmentsGeometry extends InstancedBufferGeometry {
+
+	/**
+	 * Constructs a new line segments geometry.
+	 */
+	constructor() {
+
+		super();
+
+		/**
+		 * This flag can be used for type testing.
+		 *
+		 * @type {boolean}
+		 * @readonly
+		 * @default true
+		 */
+		this.isLineSegmentsGeometry = true;
+
+		this.type = 'LineSegmentsGeometry';
+
+		const positions = [ - 1, 2, 0, 1, 2, 0, - 1, 1, 0, 1, 1, 0, - 1, 0, 0, 1, 0, 0, - 1, - 1, 0, 1, - 1, 0 ];
+		const uvs = [ - 1, 2, 1, 2, - 1, 1, 1, 1, - 1, - 1, 1, - 1, - 1, - 2, 1, - 2 ];
+		const index = [ 0, 2, 1, 2, 3, 1, 2, 4, 3, 4, 5, 3, 4, 6, 5, 6, 7, 5 ];
+
+		this.setIndex( index );
+		this.setAttribute( 'position', new Float32BufferAttribute( positions, 3 ) );
+		this.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );
+
+	}
+
+	/**
+	 * Applies the given 4x4 transformation matrix to the geometry.
+	 *
+	 * @param {Matrix4} matrix - The matrix to apply.
+	 * @return {LineSegmentsGeometry} A reference to this instance.
+	 */
+	applyMatrix4( matrix ) {
+
+		const start = this.attributes.instanceStart;
+		const end = this.attributes.instanceEnd;
+
+		if ( start !== undefined ) {
+
+			start.applyMatrix4( matrix );
+
+			end.applyMatrix4( matrix );
+
+			start.needsUpdate = true;
+
+		}
+
+		if ( this.boundingBox !== null ) {
+
+			this.computeBoundingBox();
+
+		}
+
+		if ( this.boundingSphere !== null ) {
+
+			this.computeBoundingSphere();
+
+		}
+
+		return this;
+
+	}
+
+	/**
+	 * Sets the given line positions for this geometry. The length must be a multiple of six since
+	 * each line segment is defined by a start end vertex in the pattern `(xyz xyz)`.
+	 *
+	 * @param {Float32Array|Array<number>} array - The position data to set.
+	 * @return {LineSegmentsGeometry} A reference to this geometry.
+	 */
+	setPositions( array ) {
+
+		let lineSegments;
+
+		if ( array instanceof Float32Array ) {
+
+			lineSegments = array;
+
+		} else if ( Array.isArray( array ) ) {
+
+			lineSegments = new Float32Array( array );
+
+		}
+
+		const instanceBuffer = new InstancedInterleavedBuffer( lineSegments, 6, 1 ); // xyz, xyz
+
+		this.setAttribute( 'instanceStart', new InterleavedBufferAttribute( instanceBuffer, 3, 0 ) ); // xyz
+		this.setAttribute( 'instanceEnd', new InterleavedBufferAttribute( instanceBuffer, 3, 3 ) ); // xyz
+
+		this.instanceCount = this.attributes.instanceStart.count;
+
+		//
+
+		this.computeBoundingBox();
+		this.computeBoundingSphere();
+
+		return this;
+
+	}
+
+	/**
+	 * Sets the given line colors for this geometry. The length must be a multiple of six since
+	 * each line segment is defined by a start end color in the pattern `(rgb rgb)`.
+	 *
+	 * @param {Float32Array|Array<number>} array - The position data to set.
+	 * @return {LineSegmentsGeometry} A reference to this geometry.
+	 */
+	setColors( array ) {
+
+		let colors;
+
+		if ( array instanceof Float32Array ) {
+
+			colors = array;
+
+		} else if ( Array.isArray( array ) ) {
+
+			colors = new Float32Array( array );
+
+		}
+
+		const instanceColorBuffer = new InstancedInterleavedBuffer( colors, 6, 1 ); // rgb, rgb
+
+		this.setAttribute( 'instanceColorStart', new InterleavedBufferAttribute( instanceColorBuffer, 3, 0 ) ); // rgb
+		this.setAttribute( 'instanceColorEnd', new InterleavedBufferAttribute( instanceColorBuffer, 3, 3 ) ); // rgb
+
+		return this;
+
+	}
+
+	/**
+	 * Setups this line segments geometry from the given wireframe geometry.
+	 *
+	 * @param {WireframeGeometry} geometry - The geometry that should be used as a data source for this geometry.
+	 * @return {LineSegmentsGeometry} A reference to this geometry.
+	 */
+	fromWireframeGeometry( geometry ) {
+
+		this.setPositions( geometry.attributes.position.array );
+
+		return this;
+
+	}
+
+	/**
+	 * Setups this line segments geometry from the given edges geometry.
+	 *
+	 * @param {EdgesGeometry} geometry - The geometry that should be used as a data source for this geometry.
+	 * @return {LineSegmentsGeometry} A reference to this geometry.
+	 */
+	fromEdgesGeometry( geometry ) {
+
+		this.setPositions( geometry.attributes.position.array );
+
+		return this;
+
+	}
+
+	/**
+	 * Setups this line segments geometry from the given mesh.
+	 *
+	 * @param {Mesh} mesh - The mesh geometry that should be used as a data source for this geometry.
+	 * @return {LineSegmentsGeometry} A reference to this geometry.
+	 */
+	fromMesh( mesh ) {
+
+		this.fromWireframeGeometry( new WireframeGeometry( mesh.geometry ) );
+
+		// set colors, maybe
+
+		return this;
+
+	}
+
+	/**
+	 * Setups this line segments geometry from the given line segments.
+	 *
+	 * @param {LineSegments} lineSegments - The line segments that should be used as a data source for this geometry.
+	 * Assumes the source geometry is not using indices.
+	 * @return {LineSegmentsGeometry} A reference to this geometry.
+	 */
+	fromLineSegments( lineSegments ) {
+
+		const geometry = lineSegments.geometry;
+
+		this.setPositions( geometry.attributes.position.array ); // assumes non-indexed
+
+		// set colors, maybe
+
+		return this;
+
+	}
+
+	computeBoundingBox() {
+
+		if ( this.boundingBox === null ) {
+
+			this.boundingBox = new Box3();
+
+		}
+
+		const start = this.attributes.instanceStart;
+		const end = this.attributes.instanceEnd;
+
+		if ( start !== undefined && end !== undefined ) {
+
+			this.boundingBox.setFromBufferAttribute( start );
+
+			_box.setFromBufferAttribute( end );
+
+			this.boundingBox.union( _box );
+
+		}
+
+	}
+
+	computeBoundingSphere() {
+
+		if ( this.boundingSphere === null ) {
+
+			this.boundingSphere = new Sphere();
+
+		}
+
+		if ( this.boundingBox === null ) {
+
+			this.computeBoundingBox();
+
+		}
+
+		const start = this.attributes.instanceStart;
+		const end = this.attributes.instanceEnd;
+
+		if ( start !== undefined && end !== undefined ) {
+
+			const center = this.boundingSphere.center;
+
+			this.boundingBox.getCenter( center );
+
+			let maxRadiusSq = 0;
+
+			for ( let i = 0, il = start.count; i < il; i ++ ) {
+
+				_vector.fromBufferAttribute( start, i );
+				maxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( _vector ) );
+
+				_vector.fromBufferAttribute( end, i );
+				maxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( _vector ) );
+
+			}
+
+			this.boundingSphere.radius = Math.sqrt( maxRadiusSq );
+
+			if ( isNaN( this.boundingSphere.radius ) ) {
+
+				console.error( 'THREE.LineSegmentsGeometry.computeBoundingSphere(): Computed radius is NaN. The instanced position data is likely to have NaN values.', this );
+
+			}
+
+		}
+
+	}
+
+	toJSON() {
+
+		// todo
+
+	}
+
+}
+
+export { LineSegmentsGeometry };