Author Topic: Correct Terminology for a Phase Related Concept...  (Read 673 times)

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Offline AntiProtonBoyTopic starter

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Correct Terminology for a Phase Related Concept...
« on: April 01, 2021, 07:20:43 am »
So I'm coding up a function that performs anti-aliasing for a periodic pattern in a fragment shader. One of the function arguments is a phase attribute for the periodic signal. Instead of representing phase offset in angles (or time), it is represented as an offset percentage within the total period width (kinda like how duty cycle is typically defined). My question, is there a specific name/terminology/nomenclature used to describe "phase percentage"?
 

Offline jwet

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Re: Correct Terminology for a Phase Related Concept...
« Reply #1 on: April 26, 2021, 02:18:26 am »
I think "phase percentage" is as good a name as any, "phase fraction" might be more precise, "phase/360", "relative phase in %"?   I've owned test equipment- a Tek storage scope that displayed phase this way when you were looking at signal without a time scale in X,  but I've never heard of a name.  I looked at its manual and it just avoids giving it a name.  Good luck.
 

Online 2N3055

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Re: Correct Terminology for a Phase Related Concept...
« Reply #2 on: April 26, 2021, 05:56:07 am »
Well what are you explaining is the PHASE. Phase is timing relation between two signals, expressed as a fraction of a full cycle of signal. You can express it as percentage (0-100%), degrees of circle (0-360°) or radians of circle (2Pi). That is only dimension. It will usually be periodic, or can be that it needs several rotations to sync up so you might have 720° of phase delay relative to some signal.
Time delay is absolute measure, phase is relative to cycle time.
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Offline David Hess

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Re: Correct Terminology for a Phase Related Concept...
« Reply #3 on: April 26, 2021, 09:39:34 pm »
Phase percent or percentage seems right to me since it literally is per 100.  Just be glad I did not select the units; I would have used phase per 256 to make the binary math easy.  Doing so is a major advantage because it removes all need for modulo operations.
 


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