( function () {
const _box = new THREE.Box3();
const _vector = new THREE.Vector3();
class LineSegmentsGeometry extends THREE.InstancedBufferGeometry {
constructor() {
super();
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 THREE.Float32BufferAttribute( positions, 3 ) );
this.setAttribute( 'uv', new THREE.Float32BufferAttribute( uvs, 2 ) );
}
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;
}
setPositions( array ) {
let lineSegments;
if ( array instanceof Float32Array ) {
lineSegments = array;
} else if ( Array.isArray( array ) ) {
lineSegments = new Float32Array( array );
}
const instanceBuffer = new THREE.InstancedInterleavedBuffer( lineSegments, 6, 1 ); // xyz, xyz
this.setAttribute( 'instanceStart', new THREE.InterleavedBufferAttribute( instanceBuffer, 3, 0 ) ); // xyz
this.setAttribute( 'instanceEnd', new THREE.InterleavedBufferAttribute( instanceBuffer, 3, 3 ) ); // xyz
//
this.computeBoundingBox();
this.computeBoundingSphere();
return this;
}
setColors( array ) {
let colors;
if ( array instanceof Float32Array ) {
colors = array;
} else if ( Array.isArray( array ) ) {
colors = new Float32Array( array );
}
const instanceColorBuffer = new THREE.InstancedInterleavedBuffer( colors, 6, 1 ); // rgb, rgb
this.setAttribute( 'instanceColorStart', new THREE.InterleavedBufferAttribute( instanceColorBuffer, 3, 0 ) ); // rgb
this.setAttribute( 'instanceColorEnd', new THREE.InterleavedBufferAttribute( instanceColorBuffer, 3, 3 ) ); // rgb
return this;
}
fromWireframeGeometry( geometry ) {
this.setPositions( geometry.attributes.position.array );
return this;
}
fromEdgesGeometry( geometry ) {
this.setPositions( geometry.attributes.position.array );
return this;
}
fromMesh( mesh ) {
this.fromWireframeGeometry( new THREE.WireframeGeometry( mesh.geometry ) ); // set colors, maybe
return this;
}
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 THREE.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 THREE.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
}
applyMatrix( matrix ) {
console.warn( 'THREE.LineSegmentsGeometry: applyMatrix() has been renamed to applyMatrix4().' );
return this.applyMatrix4( matrix );
}
}
THREE.LineSegmentsGeometry = LineSegmentsGeometry;
} )();
