Functional Specification of Liechtenauer’s Strikes


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The following is a not so serious idea to apply the method of systems engineering and software development. There the functional specification is the documentation that describes the requested behavior of an engineering system. Using that method we can define what the user wants from a system and how it should be functionally implemented.

Document objectives

This document describes a system in which the user can fight his opponent and win the fight. Every use case is described as a situation in which the implemented strikes where done only from above. All the definitions are more or less applicable to a mirrored situation, in which the strikes are done from below. But it is to acknowledge that system limitations of the executing bodies are given, so that there is – especially when using two handed weapons – a reduced system available for strikes from below.

Third Party References

The system requires the use of a third party tool named sword. There are the following definitions to the tool:


Document Definitions

SPEED: The following use of the term speed is to be seen as the rotational speed in radians per milliseconds, and not as meter per second in covering distance.

In the document are the terms INSIDE and OUTSIDE used frequently. These terms relate to the fencers body and weapon. The following figures show the Outside as red and the Inside as green.  Each fighter owns an Outside and Inside, the display in the image is optimized for displaying.

inside outside

It is to remark that the arm and leg of the side without the weapon has to be seen as an own system which owns an Outside and Inside of their own. Therefore they are not marked in the image. The Outside and Inside in a weapon based system are first most related to the arm wearing the weapon of the longest reach. Only if the other arm comes into contact it will be of interest if the contact is outside or inside in regard of it.

Module Zornhau

Use Case Description

The user wants to push the opponent’s blade back and outside, and attack inside. The force pushing must be generated at begin of the strike and there must not be any need to push further to the side in contact.

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