Function patternPath

Three.js/js/Three62.js:16114–16206

( 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;