/**
* @author WestLangley / http://github.com/WestLangley
*
*/
import {
Box3,
Float32BufferAttribute,
InstancedBufferGeometry,
InstancedInterleavedBuffer,
InterleavedBufferAttribute,
Sphere,
Vector3,
WireframeGeometry
} from "../../../build/three.module.js";
var LineSegmentsGeometry = function () {
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.setAttribute( 'position', new Float32BufferAttribute( positions, 3 ) );
this.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );
};
LineSegmentsGeometry.prototype = Object.assign( Object.create( InstancedBufferGeometry.prototype ), {
constructor: 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 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.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 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;
},
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 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 Box3();
return function computeBoundingBox() {
if ( this.boundingBox === null ) {
this.boundingBox = new 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 Vector3();
return function computeBoundingSphere() {
if ( this.boundingSphere === null ) {
this.boundingSphere = new 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
}
} );
export { LineSegmentsGeometry };
