Automatically set Electronic Emission Beam Data and System Data length (DIS 6) #114
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…h' into electronic_emission_lenghts_patch
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src/main/java/edu/nps/moves/dis/ElectronicEmissionBeamData.java
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src/main/java/edu/nps/moves/dis/ElectronicEmissionSystemData.java
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| public short getSystemDataLength() { | ||
| return systemDataLength; | ||
| } | ||
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| private short calculateSystemDataLength() { | ||
| //systemdata length = 13*beamCount + SUM(beamsCount)2*track/jamTargets | ||
| short size = 5; |
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What's the size = 5 represent here?
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The 5 represents 32-bit words for the fields in the pdu shown in figure below, and is a part of the System Data Length.
System Data Length. This field shall specify the length of this emitter system’s data (including
beam data and its track/jam information) in 32-bit words. The length shall include the System
Data Length field. This field shall be represented by an 8-bit unsigned integer.
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Thanks @fo-ifad ! |
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The "Beam Data Length" field, for Elecromagnetic Emission PDU, in "IEEE Std 1278.1-1995(R2002)" section 5.3.7.1- > e.1, is defined as :
Beam Data Length. This field shall specify the length of this beam’s data (including track/
jam information) in 32-bit words. The length shall include the Beam Data Length field,
and shall be represented by an 8-bit unsigned integer.
This field is set manually by the user of open-dis-java, but could be set automatically with the formula `((2 * getTrackJamTargets().size()) + 13)
`
The fields are shown in the attached image, and these are grouped in 32-bit words, so that the number of words become apparent.