Function patternPath

Three.js/js/ThreeDebug.js:9896–9981

( 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.image.width == 0 ) return;

			if ( texture.needsUpdate == true || _patterns[ texture.id ] == undefined ) {

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

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

				texture.needsUpdate = false;

			}

			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 = ( v0 + offsetY ) * height;

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

			u2 = ( u2 + offsetX ) * width;
			v2 = ( 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;
					canvas.height = texture.image.height;

					var context = canvas.getContext( '2d' );
					context.drawImage( texture.image, 0, 0 );

					_imagedatas[ texture.id ] = context.getImageData( 0, 0, texture.image.width, texture.image.height ).data;

					// variables cannot be deleted in ES5 strict mode
					//delete canvas;