init

python

PCSurvey/libs/three.js/extra/lines/LineSegmentsGeometry.js

@@ -0,0 +1,258 @@
+/**
+ * @author WestLangley / http://github.com/WestLangley
+ *
+ */
+
+THREE.LineSegmentsGeometry = function () {
+
+	THREE.InstancedBufferGeometry.call( this );
+
+	this.type = 'LineSegmentsGeometry';
+
+	var 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 ];
+	var uvs = [ - 1, 2, 1, 2, - 1, 1, 1, 1, - 1, - 1, 1, - 1, - 1, - 2, 1, - 2 ];
+	var index = [ 0, 2, 1, 2, 3, 1, 2, 4, 3, 4, 5, 3, 4, 6, 5, 6, 7, 5 ];
+
+	this.setIndex( index );
+	this.addAttribute( 'position', new THREE.Float32BufferAttribute( positions, 3 ) );
+	this.addAttribute( 'uv', new THREE.Float32BufferAttribute( uvs, 2 ) );
+
+};
+
+THREE.LineSegmentsGeometry.prototype = Object.assign( Object.create( THREE.InstancedBufferGeometry.prototype ), {
+
+	constructor: THREE.LineSegmentsGeometry,
+
+	isLineSegmentsGeometry: true,
+
+	applyMatrix: function ( matrix ) {
+
+		var start = this.attributes.instanceStart;
+		var end = this.attributes.instanceEnd;
+
+		if ( start !== undefined ) {
+
+			matrix.applyToBufferAttribute( start );
+
+			matrix.applyToBufferAttribute( end );
+
+			start.data.needsUpdate = true;
+
+		}
+
+		if ( this.boundingBox !== null ) {
+
+			this.computeBoundingBox();
+
+		}
+
+		if ( this.boundingSphere !== null ) {
+
+			this.computeBoundingSphere();
+
+		}
+
+		return this;
+
+	},
+
+	setPositions: function ( array ) {
+
+		var lineSegments;
+
+		if ( array instanceof Float32Array ) {
+
+			lineSegments = array;
+
+		} else if ( Array.isArray( array ) ) {
+
+			lineSegments = new Float32Array( array );
+
+		}
+
+		var instanceBuffer = new THREE.InstancedInterleavedBuffer( lineSegments, 6, 1 ); // xyz, xyz
+
+		this.addAttribute( 'instanceStart', new THREE.InterleavedBufferAttribute( instanceBuffer, 3, 0 ) ); // xyz
+		this.addAttribute( 'instanceEnd', new THREE.InterleavedBufferAttribute( instanceBuffer, 3, 3 ) ); // xyz
+
+		//
+
+		this.computeBoundingBox();
+		this.computeBoundingSphere();
+
+		return this;
+
+	},
+
+	setColors: function ( array ) {
+
+		var colors;
+
+		if ( array instanceof Float32Array ) {
+
+			colors = array;
+
+		} else if ( Array.isArray( array ) ) {
+
+			colors = new Float32Array( array );
+
+		}
+
+		var instanceColorBuffer = new THREE.InstancedInterleavedBuffer( colors, 6, 1 ); // rgb, rgb
+
+		this.addAttribute( 'instanceColorStart', new THREE.InterleavedBufferAttribute( instanceColorBuffer, 3, 0 ) ); // rgb
+		this.addAttribute( 'instanceColorEnd', new THREE.InterleavedBufferAttribute( instanceColorBuffer, 3, 3 ) ); // rgb
+
+		return this;
+
+	},
+
+	fromWireframeGeometry: function ( geometry ) {
+
+		this.setPositions( geometry.attributes.position.array );
+
+		return this;
+
+	},
+
+	fromEdgesGeometry: function ( geometry ) {
+
+		this.setPositions( geometry.attributes.position.array );
+
+		return this;
+
+	},
+
+	fromMesh: function ( mesh ) {
+
+		this.fromWireframeGeometry( new THREE.WireframeGeometry( mesh.geometry ) );
+
+		// set colors, maybe
+
+		return this;
+
+	},
+
+	fromLineSegements: function ( lineSegments ) {
+
+		var geometry = lineSegments.geometry;
+
+		if ( geometry.isGeometry ) {
+
+			this.setPositions( geometry.vertices );
+
+		} else if ( geometry.isBufferGeometry ) {
+
+			this.setPositions( geometry.position.array ); // assumes non-indexed
+
+		}
+
+		// set colors, maybe
+
+		return this;
+
+	},
+
+	computeBoundingBox: function () {
+
+		var box = new THREE.Box3();
+
+		return function computeBoundingBox() {
+
+			if ( this.boundingBox === null ) {
+
+				this.boundingBox = new THREE.Box3();
+
+			}
+
+			var start = this.attributes.instanceStart;
+			var end = this.attributes.instanceEnd;
+
+			if ( start !== undefined && end !== undefined ) {
+
+				this.boundingBox.setFromBufferAttribute( start );
+
+				box.setFromBufferAttribute( end );
+
+				this.boundingBox.union( box );
+
+			}
+
+		};
+
+	}(),
+
+	computeBoundingSphere: function () {
+
+		var vector = new THREE.Vector3();
+
+		return function computeBoundingSphere() {
+
+			if ( this.boundingSphere === null ) {
+
+				this.boundingSphere = new THREE.Sphere();
+
+			}
+
+			if ( this.boundingBox === null ) {
+
+				this.computeBoundingBox();
+
+			}
+
+			var start = this.attributes.instanceStart;
+			var end = this.attributes.instanceEnd;
+
+			if ( start !== undefined && end !== undefined ) {
+
+				var center = this.boundingSphere.center;
+
+				this.boundingBox.getCenter( center );
+
+				var maxRadiusSq = 0;
+
+				for ( var 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: function () {
+
+		// todo
+
+	},
+
+	clone: function () {
+
+		// todo
+
+	},
+
+	copy: function ( /* source */ ) {
+
+		// todo
+
+		return this;
+
+	}
+
+} );