Authors CurseForge

Quote from Mizh

I'm currently preparing my addon for MoP.
I've started with the Warlock class where I've found out by experimenting that:
UnitPower('player', 15) = Demonic Fury
UnitPower('player', 7) = Soul Shards
UnitPower('player', 14) = Burning Embers*

It looks like http://www.wowpedia.org/PowerType has been updated with new information and new constants.

So is there any 'top-secret' (easy) way of getting the 'real' amount of Burning Embers?

edit: I think I see what you're asking, maybe. Here's how the Blizzard GUI is currently updated ("self" here is the embers bar, and "self.emberN" is a specific ember graphic). I've elided some extraneous stuff for brevity. Comments are Blizzard's except for the obvious "...." pseudocode text.

local MAX_POWER_PER_EMBER = 10

function BurningEmbersBar_Update(self, powerType, forceUpdate)
.....
	local maxPower = UnitPowerMax("player", SPELL_POWER_BURNING_EMBERS, [b]true[/b])
	local power = UnitPower("player", SPELL_POWER_BURNING_EMBERS, [b]true[/b])
	local numEmbers = floor(maxPower / MAX_POWER_PER_EMBER)

	if ( self.emberCount ~= numEmbers ) then
		if ( numEmbers == 3 ) then
			self.ember1:SetPoint("TOPLEFT", 17, 7)
			self.ember2:SetPoint("LEFT", self.ember1, 40, 0)
			self.ember3:SetPoint("LEFT", self.ember2, 40, 0)
			self.ember4.fire:Hide()
			self.ember4.active = false
			self.ember4:Hide()
		else
			self.ember1:SetPoint("TOPLEFT", 16, 7)
			self.ember2:SetPoint("LEFT", self.ember1, 26, 0)
			self.ember3:SetPoint("LEFT", self.ember2, 26, 0)
			self.ember4:Show()
		end
		self.emberCount = numEmbers
	end
	self.power = power
	self.maxPower = maxPower
	if ( forceUpdate ) then
		BurningEmbersBar_SetPower(self, power)
	end
end

function BurningEmbersBar_SetPower(self, power)
	self.displayedPower = power
	for i = 1, self.emberCount do
		local ember = self["ember"..i]
		WarlockPowerFrame_UpdateFill(ember.fill, WARLOCK_POWER_FILLBAR["Destruction"], power, MAX_POWER_PER_EMBER)

		-- animate?
		if ( power >= MAX_POWER_PER_EMBER ) then
			.... animate the "heating up" graphics
		else
			.... animate the "smoking / cooling off" graphics
		end
		
		-- leftover for the other embers
		power = power - MAX_POWER_PER_EMBER
	end
end

That may or may not answer your question.

The WarlockPowerFrame_UpdateFill function is just handling which texcoords to use and :Show based on the warlock spec; it doesn't do anything with the current ember value other than "do we show this at all?"

Note the bolded "true"s passed in. That 3rd parameter is used nowhere else in Blizzard's code, not even for the other two warlock specs. It apparently means "use the fractional units". I printed out values while nuking a targeting dummy on my premade beta toon; by default UnitPowerMax always returned 3 and UnitPower was the 1/2/3 number of embers I had filled. With the 3rd param, UnitPowerMax returned 30 and UnitPower returned numbers like 9, 13, 24, eventually 30. So that may be what you're looking for.

I have no idea what game effect would activate the 4th hidden-by-default ember. Presumably it's in preparation for a future tier set bonus or something.

... And is there a place where one can read in detail about that kind of changes..? (wowpedia doesn't seem to provide much detail about this kind of stuff...)

There's a list accumulating at http://www.wowpedia.org/Patch_5.0.1/API_changes but, like all other wowpedia pages, it's community driven. "This kind of stuff" has to be discovered and then also written down.

Quote from Farmbuyer

I have no idea what game effect would activate the 4th hidden-by-default ember. Presumably it's in preparation for a future tier set bonus or something.

Oh, and there's a hidden 4th soul shard too, for future affliction bonuses.

Doesn't seem to be anything graphical for demonic fury. Guessing they just get more demonically pissed off.

Quote from Mizh

Doesn't seem to be anything graphical for demonic fury.

Demonic Fury is displayed in a bar with Demonology :)

I meant in terms of extra resources, akin to the 4th shard or 4th ember.

All of this stuff can be extracted from the beta client (link), although you'd have to remember to do that each time there's a patch. Ketho and Tekkub often host the diffs themselves (link).

Quote from Mizh

The 4th soul shard is from a glyph, and soul shards is only used for Affliction it seems.

IIRC there is a glyph for a 4th burning ember too.

Quote from Mizh

Where do you find the code for the Blizzard GUI?

I'm googling something like "wow ui sources tekkub", first link to GitHub, there by link branches with MoP Beta. Downloadable as zip.

Quote from another

I'm googling something like "wow ui sources tekkub", first link to GitHub, there by link branches with MoP Beta. Downloadable as zip.

You can also get it directly from the game files installed on your PC: Viewing Blizzard's interface code