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Rewinding time-based script sequences

  • US 5,475,811 A
  • Filed: 09/13/1994
  • Issued: 12/12/1995
  • Est. Priority Date: 03/31/1993
  • Status: Expired due to Term
First Claim
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1. A method for rewinding a time-based script, for use with a plurality of data objects each having a state, the script comprising an ordered sequence of commands for modifying the state of one or more of the data objects over time, each command associated with a corresponding time value, and one or more of the commands being conditional, said method comprising the following steps:

  • generating a sequence of time values in real-time, using a clock, starting from an initial time value;

    executing, using a digital computer, the script command associated with each generated time value;

    tagging each data object created by the script commands;

    interactively specifying a desired time value earlier than a currently generated time value;

    deleting one or more of the tagged data objects, thereby restoring each data object to its state as of the initial time value, using the digital computer;

    after the preceding step, skipping ahead to the desired time value by restoring each data object to its state as of the desired time value, in less time than the difference between the initial time value and the desired time value; and

    resetting the clock to the desired time value, thereby rewinding the time-based script to the desired time value.

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