Function patternPath

Three.js/js/Three56.js:14376–14468

( x0, y0, x1, y1, x2, y2, u0, v0, u1, v1, u2, v2, texture )

		}

		function patternPath( x0, y0, x1, y1, x2, y2, u0, v0, u1, v1, u2, v2, texture ) {

			if ( texture instanceof THREE.DataTexture || texture.image === undefined || texture.image.width == 0 ) return;

			if ( texture.needsUpdate === true ) {

				var repeatX = texture.wrapS == THREE.RepeatWrapping;
				var repeatY = texture.wrapT == THREE.RepeatWrapping;

				_patterns[ texture.id ] = _context.createPattern(
					texture.image, repeatX === true && repeatY === true
						? 'repeat'
						: repeatX === true && repeatY === false
							? 'repeat-x'
							: repeatX === false && repeatY === true
								? 'repeat-y'
								: 'no-repeat'
				);

				texture.needsUpdate = false;

			}

			_patterns[ texture.id ] === undefined
				? setFillStyle( 'rgba(0,0,0,1)' )
				: setFillStyle( _patterns[ texture.id ] );

			// http://extremelysatisfactorytotalitarianism.com/blog/?p=2120

			var a, b, c, d, e, f, det, idet,
			offsetX = texture.offset.x / texture.repeat.x,
			offsetY = texture.offset.y / texture.repeat.y,
			width = texture.image.width * texture.repeat.x,
			height = texture.image.height * texture.repeat.y;

			u0 = ( u0 + offsetX ) * width;
			v0 = ( 1.0 - v0 + offsetY ) * height;

			u1 = ( u1 + offsetX ) * width;
			v1 = ( 1.0 - v1 + offsetY ) * height;

			u2 = ( u2 + offsetX ) * width;
			v2 = ( 1.0 - v2 + offsetY ) * height;

			x1 -= x0; y1 -= y0;
			x2 -= x0; y2 -= y0;

			u1 -= u0; v1 -= v0;
			u2 -= u0; v2 -= v0;

			det = u1 * v2 - u2 * v1;

			if ( det === 0 ) {

				if ( _imagedatas[ texture.id ] === undefined ) {

					var canvas = document.createElement( 'canvas' )
					canvas.width = texture.image.width;