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Storyboard Scripting (Cheat Sheet)

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Original Post: [Official Specifications] Storyboarding by Scripting by: Echo


Storyboarding by Scripting

In the .osu file, under [Events]: Note: underscores can be replaced with spaces.

Sprites and Animations

The size of the active playfield is 640 pixels wide by 480 pixels high. For static background images/effects, it is best to limit images to these dimensions.

Static Sprite:

_event, easing, starttime, endtime, [params]
_event, [...]
_event, [...]


_event, [...]
_event, [...]

For animations, specify a filename like "sliderball.png", and name your files "sliderball0.png" to "sliderball9.png" for a 10 frame animation.

frameCount: number of frames in the animation frameDelay: delay in milliseconds between each frame. looptype: LoopForever by default

  • LoopForever - Loops over and over again
  • LoopOnce - Loops once and stops on last frame.

Z-order (back to front) is determined by the order the files appear in the .osu file. The first storyboard event will be behind everything else, ie. if storyboard event 'A' is above storyboard event 'B', 'B' will be on top of 'A'.


  • Background
  • Fail
  • Pass
  • Foreground

Note: Background and Foreground are always visible.


  • TopLeft
  • TopCentre
  • TopRight
  • CentreLeft
  • Centre
  • CentreRight
  • BottomLeft
  • BottomCentre
  • BottomRight

All Rotations and Size changes (Including Vector Scaling) are affected by origin.

filepath: relative path of the image file (should be in the same directory as the .osu file) Note: file path must be in double quotes if it has spaces in the filename

x, y: the position of the image Note: (0,0) is the top left corner while (640,480) is the bottom right corner.

For each of the event types below, the initial value(s) of that event will assume the first assignment given to that event.

event type:

  • F - fade
  • M - move
  • S - scale
  • V - vector scale (width and height separately)
  • R - rotate
  • C - colour
  • L - loop
  • T - Event-triggered loop
  • P - Parameters


  • 0 - none
  • 1 - start fast and slow down
  • 2 - start slow and speed up

starttime, endtime: the times in milliseconds between which the event will be animated



startopacity: the opacity at the beginning of the animation

endopacity: the opacity at the end of the animation

Note: 0 - invisible, 1 - fully visible


startx, starty: the position at the beginning of the animation endx, endy: the position at the end of the animation Note: the size of the play field is (640,480), with (0,0) being top left corner.


startscale: the scale factor at the beginning of the animation endscale: the scale factor at the end of the animation

Note: 1 = 100%, 2 = 200% etc. decimals are allowed.

startx, starty: the scale factor at the beginning of the animation endx, endy: the scale factor at the end of the animation 1 = 100%, 2 = 200% etc. decimals are allowed.


startangle: the angle to rotate by in radians at the beginning of the animation endangle: the angle to rotate by in radians at the end of the animation

Note: positive angle is clockwise rotation

r1, g1, b1: the starting component-wise colour r2, g2, b2: the finishing component-wise colour

sprites with (255,255,255) will be their original colour. sprites with (0,0,0) will be totally black. anywhere in between will result in subtractive colouring. to make full use of this, brighter grayscale sprites work very well.


startx: the x position at the beginning of the animation endx: the x position at the end of the animation


starty: the y position at the beginning of the animation endy: the y position at the end of the animation


p: the effect parameter to apply H - horizontal flip V - vertical flip A - additive-blend colour (as opposed to alpha-blend)

using the shorthand below with parameters is possible. the applied parameters will take effect during the duration specified only.

shorthand: This notation can be used to quickly script a large number of the same kind of event over the same time span.


would create events:

_event,easing,starttime + duration,endtime + duration,val2,val3
_event,easing,starttime + 2duration,endtime + 2duration,val3,val4


shorthand2: This notation can be used when the start and end time of the event is the same.




Please note the blank space in the endtime field - this is required.

shorthand3: This notation can be used when the start and end values of the event are the same.





Standard Loops: Loops can be defined to repeat a set of events constantly for a set number of iterations.

__event, [...]
__event, [...]

starttime: the time of the first loop's start. loopcount: number of times to repeat the loop.

Note that events inside a loop should be timed with a [b]zero-base[/b]. This means that you should [b]start from 0ms[/b] for the inner event's timing and work up from there. The loop event's start time will be added to this value at game runtime.

__event, [...]
__event, [...]

Trigger Loops:

Trigger loops can be used to trigger animations based on play-time events. Although called loops, trigger loops only execute once when triggered.

__event, [...]
__event, [...]

start: When the trigger is valid end : When the trigger stops being valid

Current triggers supported are:

  • HitSoundClap
  • HitSoundFinish
  • HitSoundWhistle
  • Passing (transition from fail state to pass state)
  • Failing (transition from pass state to fail state)

Trigger loops are zero-based similar to normal loops. If two overlap, the first will be halted and replaced by a new loop from the beginning. If they overlap any existing storyboarded events, they will not trigger until those transformations are not in effect.

Sound effects


time: the time in milliseconds to start playing the sound effect


Background = 0
Fail = 1
Pass = 2
Foreground = 3

filepath: relative path of the sound file (should be in the same directory as the .osu file)

Note: file path must be in double quotes

volume: volume of the sound file. (1-100) Can be left off for 100.


Primitive support for variables is now available. You can define any number of variables by includin a [Variables] section in the .osb file (currently not supported in .osu-specific storyboarding).


Once you define variables, you can use them *anywhere* in the storyboard. This means you can have a variable containing as much as a whole line. Please don't make variable too small for the moment (ie. don't assign $var=1) because the editor is not smart enough to know where to put variables when it saves. All occurrences of the variables will currently be replaced at save time (so if you have one place you used $white and another you used 255,255,255 they will both become $white after a save in the editor).

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