ReadWebField

Synopsis

An application module that reads a web-based AVS/Express field.

Input Port

None.

Parameters

URL UItext OutFile UItext Status UItext portable_toggle UItoggle swap_toggle UItoggle flip_toggle UItoggle

Output Port

obj DefaultObject

Description

This module accepts a web-based URL pointing at an AVS/Express field data file hosted by a WWW server. The field data file is then cached locally and read as though it were a field data type.

Input

None.

Parameters

URL

Specify a valid URL address. The ReadWebField module reads and caches the contents contained at the location specified. If the URL is invalid or points to unretrievable information, the phrase " URL contains no data " appears in the Status parameter.

OutFile

The location of the URL content cache. It is also the port that is used as input to another AVS/Express data reader. The default location is /tmp/xp_out.da t, but a you can change the location at any time.

If two URLs are fetched in a row, the contents of the second URL overwrite the contents of the first URL if the location of the cache file is not changed. The OutFile _parameter receives an notify _event after every valid URL retrieval.

Status

A text field that contains status information for the current URL fetch. Messages are displayed in this field as the URL collection progresses; these messages are described in W3Cget_URL .

portable_toggle

Toggle XDR mode on/off.

swap_toggle

Turn byte swapping on/off.

flip_toggle

Flip the x-axis of the field.

Output Port

obj

Renderable output geometry from reading the field.

Example

Examples.Graphics_Display.WebMultiView

v/gd_examp/URLread1.v

File

v/w3c.v

See also related modules