computeLineDistances method

Wireframe computeLineDistances()

Implementation

Wireframe computeLineDistances() {
	final geometry = this.geometry!;

	final instanceStart = geometry.attributes['instanceStart'];
	final instanceEnd = geometry.attributes['instanceEnd'];
	final lineDistances = Float32Array( (2 * instanceStart.count).toInt() );

	for (int i = 0, j = 0, l = instanceStart.count; i < l; i ++, j += 2 ) {
		_start.fromBuffer( instanceStart, i );
		_end.fromBuffer( instanceEnd, i );

		lineDistances[ j ] = ( j == 0 ) ? 0 : lineDistances[ j - 1 ];
		lineDistances[ j + 1 ] = lineDistances[ j ] + _start.distanceTo( _end );
	}

	final instanceDistanceBuffer = InstancedInterleavedBuffer( lineDistances, 2, 1 ); // d0, d1

	geometry.setAttributeFromString( 'instanceDistanceStart', InterleavedBufferAttribute( instanceDistanceBuffer, 1, 0 ) ); // d0
	geometry.setAttributeFromString( 'instanceDistanceEnd', InterleavedBufferAttribute( instanceDistanceBuffer, 1, 1 ) ); // d1

	return this;
}