Scoring System FAQ (cutoff calculation explained!)

[krimsunmunkeys]

I'm bored, so I'll go test this out for you.

[krimsunmunkeys]

I'm bored, so I'll go test this out for you.

[MaximusDM]

[MaximusDM]

[Echelar]

I've never been able to use it *immediately* after getting it. I think the time discrepancy is that it takes a few milliseconds for the meter to actually fill, and the message to come on screen. If there's at least an 8th pause, I can usually squeeze it off if I try enough times.
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[Echelar]

I've never been able to use it *immediately* after getting it. I think the time discrepancy is that it takes a few milliseconds for the meter to actually fill, and the message to come on screen. If there's at least an 8th pause, I can usually squeeze it off if I try enough times.
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[krimsunmunkeys]

[krimsunmunkeys]

[Echelar]

I'd never really thought about the 49% + another combo being different from 25% + another combo, but it makes sense.

It also explains why I never have trouble using SP really fast when I'm whammying out the half bar instead of getting it from just a normal sequence.

Yet another variable to include in the program JCirri and I are (slowly) working on...
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[Echelar]

I'd never really thought about the 49% + another combo being different from 25% + another combo, but it makes sense.

It also explains why I never have trouble using SP really fast when I'm whammying out the half bar instead of getting it from just a normal sequence.

Yet another variable to include in the program JCirri and I are (slowly) working on...
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[Echelar]

For a visual illustration:

(this is Ace of Spades by the way)

Test 1: 25% -> 50%

Before hitting the SP:



After hitting the SP, while it's filling the bar:
Elapsed time: 1 thin line



Bar filled up to 50%:
Elapsed time: ~1.5 thin lines



When I managed to use the SP:
Elapsed time: 2 thin lines = 1 bold line



Test #2: 49% -> 50%

Same place. I had almost a half bar from whammying the first SP of the song almost up to half. Got it and used it as fast as I could:
Elapsed time: 1/4 thin line?


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[Echelar]

For a visual illustration:

(this is Ace of Spades by the way)

Test 1: 25% -> 50%

Before hitting the SP:



After hitting the SP, while it's filling the bar:
Elapsed time: 1 thin line



Bar filled up to 50%:
Elapsed time: ~1.5 thin lines



When I managed to use the SP:
Elapsed time: 2 thin lines = 1 bold line



Test #2: 49% -> 50%

Same place. I had almost a half bar from whammying the first SP of the song almost up to half. Got it and used it as fast as I could:
Elapsed time: 1/4 thin line?


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[JCirri]

After analyzing PS2 video output frame-by-frame. It seems regardless of tempo it always takes 10 frames to fill the meter by 25% and 11 frames before the message pops up.

At 29.97 Hz, this means 10 frames = 0.333 secs

So esentially it takes a third of a second for star power to fill up after completing a starpower combo.

I also noticed that it begins filling the meter as soon as you hit the last note (not necessarilly at the note's true location, if you hit the note early or late).
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[JCirri]

After analyzing PS2 video output frame-by-frame. It seems regardless of tempo it always takes 10 frames to fill the meter by 25% and 11 frames before the message pops up.

At 29.97 Hz, this means 10 frames = 0.333 secs

So esentially it takes a third of a second for star power to fill up after completing a starpower combo.

I also noticed that it begins filling the meter as soon as you hit the last note (not necessarilly at the note's true location, if you hit the note early or late).
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[Echelar]

While testing the "does it fill up as soon as you hit it" question, I was able to redo test #2...

I hit the note early, and used SP as fast as possible. What resulted was that I had SP going before I even crossed the line that the note was on.

The line is a bit hard to see, the pic was taken from a paused VCR... look on the edges of the fret board around the orange circle and you can see the note line.


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[Echelar]

While testing the "does it fill up as soon as you hit it" question, I was able to redo test #2...

I hit the note early, and used SP as fast as possible. What resulted was that I had SP going before I even crossed the line that the note was on.

The line is a bit hard to see, the pic was taken from a paused VCR... look on the edges of the fret board around the orange circle and you can see the note line.


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[JCirri]

I've just confirmed the star power meter fills up after completing a combo 25% within 0.333 secs.

I've also been testing the allowable timing windows for hitting notes. It seems the timing window corresponds to the amount of time that a note overlaps the fret icons at the bottom of the screen. This implies that the timing window is dependent on the scroll rate of the screen which is different for each difficulty. Hence the timing window is smaller on Expert and larger on Easy (since notes will be overlapping the fret icons for a longer period of time on Easy).

Based on analyzing frames, I've calculated the timing window on expert to be 0.1667 secs (a sixth of a second).

Note that this is exactly half of the time it takes to fill SP after finishing a combo (a third of a second).

However, after further testing, this relationship between the rate of SP filling up and the timing window does not hold true for other difficulties. While the timing window becomes larger for easier difficulties, the rate at which the SP meter fills up remains constant (25% within 0.333 secs).

This may sound confusing, but I wanted to document my results on here so I have them to develop my optimal scoring program as accurately as possible.
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[JCirri]

I've just confirmed the star power meter fills up after completing a combo 25% within 0.333 secs.

I've also been testing the allowable timing windows for hitting notes. It seems the timing window corresponds to the amount of time that a note overlaps the fret icons at the bottom of the screen. This implies that the timing window is dependent on the scroll rate of the screen which is different for each difficulty. Hence the timing window is smaller on Expert and larger on Easy (since notes will be overlapping the fret icons for a longer period of time on Easy).

Based on analyzing frames, I've calculated the timing window on expert to be 0.1667 secs (a sixth of a second).

Note that this is exactly half of the time it takes to fill SP after finishing a combo (a third of a second).

However, after further testing, this relationship between the rate of SP filling up and the timing window does not hold true for other difficulties. While the timing window becomes larger for easier difficulties, the rate at which the SP meter fills up remains constant (25% within 0.333 secs).

This may sound confusing, but I wanted to document my results on here so I have them to develop my optimal scoring program as accurately as possible.
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[MaximusDM]

[MaximusDM]

[JCirri]

[JCirri]

[krimsunmunkeys]

Nice. I don't have the equipment to test things frame by frame.

[krimsunmunkeys]

Nice. I don't have the equipment to test things frame by frame.

[IEatGlue]

tru.dat
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[IEatGlue]

tru.dat
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[Dandaman]

jeez u really have to know your math to work for scorehero XD

[Dandaman]

jeez u really have to know your math to work for scorehero XD

[b3nz0r]

This stuff is very interesting. Great research, Ech/JC.
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[b3nz0r]

This stuff is very interesting. Great research, Ech/JC.
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