Animating a sprite using the songs BPM on the Music Wheel

Hi all,

I've been working on a theme and I need some advice, I want to animate a sprite using the BPM from the currently highlighted song on the music wheel.

Here's my sprite animation code:

t[#t+1] = Def.Sprite {
Condition=GAMESTATE:IsCourseMode() == false;
Condition=GAMESTATE:IsSideJoined(PLAYER_1) == true;
Texture="_sprite1 4x8.png",
InitCommand=function(self)
self:diffusealpha(0.5):zoom(1):vertalign(bottom):Center():xy(_screen.cx-350, _screen.cy+97)
self:SetAllStateDelays(0.0516)
end,
OnCommand=function(self)
--self:sleep(999):linear(1):diffusealpha(0)
end
};

t[#t+1] = Def.Sprite {
Condition=GAMESTATE:IsCourseMode() == false;
Condition=GAMESTATE:IsSideJoined(PLAYER_2) == true;
Texture="_sprite2 4x8.png",
InitCommand=function(self)
self:diffusealpha(0.5):zoom(1):vertalign(bottom):Center():xy(_screen.cx+350, _screen.cy+97)
self:SetAllStateDelays(0.0516)
end,
OnCommand=function(self)
--self:sleep(999):linear(1):diffusealpha(0)
end
};

I'd like to animate them "in time" with the music. I've worked out that I'd need to alter the "SetAllStateDelays" to do it but I'd need most of the values for that to be lower than 1 as 1 is too slow.

From what I've read I think I need to do something with GetSongBeat() but I'm not sure.

Any insight would be greatly appreciated, I've seen other themes animate things to the BPM (even the default SM5 theme animates the header to the BPM) - but I've only ever seen instances where it just zooms or changes the velocity of the object, not directly affecting a sprite animation.

Hope someone can help!

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https://github.com/MidflightDigital/ddrsn3-theme/blob/master/DDR%20SN3/BGAnimations/ScreenSelectMusic%20overlay/bpmmeter.lua

feel free to use it

Thanks for that. I ended up using "effectclock" to get the animation going in sync with the music. I had to change the state delays offset to a bit higher to get the desired result but it's working fantastically now! Hope this will help someone.

t[#t+1] = Def.Sprite {
Condition=GAMESTATE:IsCourseMode() == false;
Condition=GAMESTATE:IsSideJoined(PLAYER_1) == true;
Texture="_sprite 4x8.png",
InitCommand=function(self)
self:diffusealpha(0.5):zoom(1):vertalign(bottom):Center():xy(_screen.cx-350, _screen.cy+97):effectclock('beatnooffset')
local song = GAMESTATE:GetCurrentSong()
local getbeat = GAMESTATE:GetSongBeat()
local getbeatdown = (getbeat/60)/10
self:SetAllStateDelays(0.1200)
end,
OnCommand=function(self)
--self:sleep(999):linear(1):diffusealpha(0)
end
};

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