The expression library
Use
to easily include the methods and classes listed here to your expressions.
These methods take the name (listed here) of the function/class as arguments.
Use
DuAEExpression.Library.get and DuAEExpression.Library.getRequirementsto easily include the methods and classes listed here to your expressions.
These methods take the name (listed here) of the function/class as arguments.
Classes
Methods
# static "addNoise"(val, quantity)
Adds some noise to a value.
You may use seedRandom() before using this function as it will influence the generated noise. A timeless noise can be achieved with
You may use seedRandom() before using this function as it will influence the generated noise. A timeless noise can be achieved with
seedRandom(index,true) for example.
Parameters:
| Name | Type | Description |
|---|---|---|
val |
number
|
Array.<number>
|
The value to add noise to. |
quantity |
float
|
The quantity of noise. A percentage. 100 means the value can range from (val * 0) to (val * 2). |
Examples
seedRandom(index, true) // a timeless noise
addNoise(value, 50 ); // the property value will have noise between (value * 0.5) and (value * 1.5) which won't vary through time.seedRandom(index, false);
addNoise(value, 33 ); // the noise will change at each frame, varying between (value * .66) and (value * 1.33)# static "addPath"(path1, path2, path2weight) → {Object}
Adds two paths together.
The paths must be objects with three array attributes: points, inTangents, outTangents
The paths must be objects with three array attributes: points, inTangents, outTangents
Parameters:
| Name | Type | Description |
|---|---|---|
path1 |
Object
|
First path |
path2 |
Object
|
Second path |
path2weight |
float
|
A weight to multiply the second path values |
- module:addPoints
A path object with three array attributes: points, inTangents, outTangents
Object
# static "addPoints"(p1, p2, w) → {Array.<Array.<float>>}
Adds two lists of points/vectors.
Parameters:
| Name | Type | Description |
|---|---|---|
p1 |
Array.<Array.<float>>
|
The list of points |
p2 |
Array.<Array.<float>>
|
The other list of points |
w |
float
|
A weight to multiply the values of p2 |
The added points
Array.<Array.<float>>
# static "animate"(keyframes, loopOutopt, loopInopt, timeopt) → {number}
Animates the property using the given keyframes
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
keyframes |
Array.<Object>
|
The keyframes. An object with four properties:value The value of the keyframetime The time of the keyframeinterpolation (optional. Default: linear) A function taking 5 arguments to interpolate between this keyframe and the next oneparams (optional.) A sixth argument passed to the interpolation function. To be used with DuAEF interpolations.Note that the keyframes must be sorted. The function does not sort them, as it would have a bad impact on performance. |
||
loopOut |
string
|
<optional> |
'none' | One of 'none', 'cycle', 'pingpong'. |
loopIn |
string
|
<optional> |
'none' | One of 'none', 'cycle', 'pingpong'. |
time |
float
|
<optional> |
time | Use this to control how time flows. |
the animated value.
number
Example
var keyframes = [
{value: 0, time: 1, interpolation: linear},
{value: 180, time: 2, interpolation: gaussianInterpolation, params: -0.5}, //You need to include the gaussianInterpolation function from DuAEF
{value: 250, time: 4, interpolation: ease},
{value: 360, time: 5},
];
animate(keyframes, 'cycle', 'pingpong');# static "bezierInterpolation"(t, tMinopt, tMaxopt, value1opt, value2opt, bezierPointsopt) → {number}
Interpolates a value with a bezier curve.
This method can replace
This method can replace
linear() and ease() with a custom bézier interpolation.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
number
|
The value to interpolate | ||
tMin |
number
|
<optional> |
0 | The minimum value of the initial range |
tMax |
number
|
<optional> |
1 | The maximum value of the initial range |
value1 |
number
|
<optional> |
0 | The minimum value of the interpolated result |
value2 |
number
|
<optional> |
1 | The maximum value of the interpolated result |
bezierPoints |
Array.<number>
|
<optional> |
[0.33,0.0,0.66,1.0] | an Array of 4 coordinates wihtin the [0.0, 1.0] range which describes the Bézier interpolation. The default mimics the native ease() function [ outTangentX, outTangentY, inTangentX, inTangentY ] |
the value.
number
# static "bounce"(t, elasticity, damping, vAtTimeopt) → {float|Array.<float>}
Bounce, to be used when the speed is 0.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
float
|
The time at which the value must be got. To end the loop, pass the same time for all subsequent frames. | ||
elasticity |
float
|
The elasticity, which controls the amplitude and frequence according to the last known velocity | ||
damping |
float
|
Damping | ||
vAtTime |
function
|
<optional> |
valueAtTime | A function to replace valueAtTime. Use this to loop after an expression+keyframe controlled animation, by providing a function used to generate the animation. |
- module:getPrevKey
- module:bezierInterpolation
The new value
float
|
Array.<float>
# static "checkDuikEffect"(fx, duikMatchName) → {boolean}
Checks the type of a pseudo-effect used by Duik.
This is a workaround for the missing matchName in expressions.
Pseudo-Effects used by Duik start with a hidden property which name is the same as the matchName of the effect itself (without the 'Pseudo/' part).
This is a workaround for the missing matchName in expressions.
Pseudo-Effects used by Duik start with a hidden property which name is the same as the matchName of the effect itself (without the 'Pseudo/' part).
Parameters:
| Name | Type | Description |
|---|---|---|
fx |
Property
|
The effect to check |
duikMatchName |
string
|
The matchName of a pseudo-effect used by Duik (without the 'Pseudo/' part) |
True when the property at propIndex is named propName
boolean
Example
if ( checkEffect(thisLayer.effect(1), "DUIK parentConstraint2") ) { "This is the second version of the parent constraint by Duik" }
else { "Who knows what this is?" }# static "checkEffect"(fx, propIndex, propName) → {boolean}
Checks the type of an effect.
This is a workaround for the missing matchName in expressions.
It checks if the given effect has a specific property at a specific index.
This is a workaround for the missing matchName in expressions.
It checks if the given effect has a specific property at a specific index.
Parameters:
| Name | Type | Description |
|---|---|---|
fx |
Property
|
The effect to check |
propIndex |
int
|
The index of the property |
propName |
string
|
The expected name of the property. Be careful with the internationalization of After Effects... |
True when the property at propIndex is named propName
boolean
Example
if ( checkEffect(thisLayer.effect(1), 1, "Blur") ) { "The first effect is a blur!" }
else { "Who knows what this is?" }# static "continueIn"(t, dampingopt) → {float|Array.<float>}
Animatable equivalent to loopIn('continue').
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
float
|
The time at which the value must be got. To end the loop, pass the same time for all previous frames. | ||
damping |
float
|
<optional> |
0 | Exponentially attenuates the effect over time |
- module:getNextKey
The new value
float
|
Array.<float>
# static "continueOut"(t, dampingopt) → {float|Array.<float>}
Animatable equivalent to loopOut('continue').
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
float
|
The time at which the value must be got. To end the loop, pass the same time for all subsequent frames. | ||
damping |
float
|
<optional> |
0 | Exponentially attenuates the effect over time |
- module:getNextKey
The new value
float
|
Array.<float>
# static "cycleIn"(t, nK, o, vAtTimeopt, dampingopt) → {float|Array.<float>}
Animatable equivalent to loopIn('cycle') and loopIn('offset').
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
float
|
The time at which the value must be got. To end the loop, pass the same time for all previous frames. | ||
nK |
int
|
The number of keyframes to loop. Use 0 to loop all keyframes | ||
o |
Boolean
|
Wether to offset or cycle | ||
vAtTime |
function
|
<optional> |
valueAtTime | A function to replace valueAtTime. Use this to loop after an expression+keyframe controlled animation, by providing a function used to generate the animation. |
damping |
float
|
<optional> |
0 | Exponentially attenuates the effect over time |
- module:getNextKey
The new value
float
|
Array.<float>
# static "cycleOut"(t, nK, o, vAtTimeopt, dampingopt) → {float|Array.<float>}
Animatable equivalent to loopOut('cycle') and loopOut('offset').
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
float
|
The time at which the value must be got. To end the loop, pass the same time for all subsequent frames. | ||
nK |
int
|
The number of keyframes to loop. Use 0 to loop all keyframes | ||
o |
Boolean
|
Wether to offset or cycle | ||
vAtTime |
function
|
<optional> |
valueAtTime | A function to replace valueAtTime. Use this to loop after an expression+keyframe controlled animation, by providing a function used to generate the animation. |
damping |
float
|
<optional> |
0 | Exponentially attenuates the effect over time |
- module:getPrevKey
The new value
float
|
Array.<float>
# static "dishineritRotation"(lopt) → {float}
Removes the ancestors rotation from the rotation of a layer.
This is very useful to make a layer keep its orientation without being influenced by its parents.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
l |
Layer
|
<optional> |
thisLayer | The layer |
- module:sign
The new rotation value, in degrees.
float
Examples
//in a rotation property, just include the function and use:
dishineritRotation();
//the layer will now keep its own orientation.//you can also combine the result with something else
var result = dishineritRotation();
result + wiggle(5,20);# static "dishineritScale"(lopt) → {Array.<float>}
Removes the ancestors scale from the scale of a layer.
This is very useful to make a layer keep its scale without being influenced by its parents.
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
l |
Layer
|
<optional> |
thisLayer | The layer |
The new scale value, in percent.
Array.<float>
Examples
//in a rotation property, just include the function and use:
dishineritScale();
//the layer will now keep its own scale.//you can also combine the result with something else
var result = dishineritScale();
result + wiggle(5,20);# static "distanceToLine"(point, line) → {float}
Gets the distance of a point to a line
Parameters:
| Name | Type | Description |
|---|---|---|
point |
Array.<float>
|
The point [x,y] |
line |
Array.<Array.<float>>
|
The line [ A , B ] where A and B are two points |
The distance
float
# static "expInterpolation"(t, tMinopt, tMaxopt, value1opt, value2opt, rateopt) → {number}
Interpolates a value with an exponential function.
This method can replace
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
This method can replace
linear() and ease() with a gaussian interpolation.Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
number
|
The value to interpolate | ||
tMin |
number
|
<optional> |
0 | The minimum value of the initial range |
tMax |
number
|
<optional> |
1 | The maximum value of the initial range |
value1 |
number
|
<optional> |
0 | The minimum value of the interpolated result |
value2 |
number
|
<optional> |
1 | The maximum value of the interpolated result |
rate |
number
|
<optional> |
1 | The raising speed in the range [0, inf]. |
- module:linearExtrapolation
the value.
number
# static "fromGroupToLayer"(point) → {Array.<number>}
Converts the point coordinates from the current group in the shape layer to the Layer.
Use toWorld and toComp with the result if you need te coordinates in the world or the comp.
Use toWorld and toComp with the result if you need te coordinates in the world or the comp.
Parameters:
| Name | Type | Description |
|---|---|---|
point |
Array.<number>
|
The 2D coordinates of the point in the current group. |
- module:Matrix
- module:getGroupTransformMatrix
The 2D coordinates of the point in the Layer.
Array.<number>
# static "fromLayerToGroup"(point) → {Array.<number>}
Converts the point coordinates from Layer to the current group in the shape layer.
Use fromWorld or fromComp first if you need to convert from the world or composition coordinates, and pass the result to this function.
Use fromWorld or fromComp first if you need to convert from the world or composition coordinates, and pass the result to this function.
Parameters:
| Name | Type | Description |
|---|---|---|
point |
Array.<number>
|
The 2D coordinates of the point in the Layer. |
- module:Matrix
- module:getGroupTransformMatrix
The 2D coordinates of the point in the current group.
Array.<number>
# static "gaussian"(value, minopt, maxopt, centeropt, fwhmopt) → {Number}
The gaussian function
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
value |
Number
|
The variable | ||
min |
Number
|
<optional> |
0 | The minimum return value |
max |
Number
|
<optional> |
1 | The maximum return value |
center |
Number
|
<optional> |
0 | The center of the peak |
fwhm |
Number
|
<optional> |
1 | The full width at half maximum of the curve |
The result
Number
# static "gaussianInterpolation"(t, tMinopt, tMaxopt, value1opt, value2opt, rateopt) → {number}
Interpolates a value with a gaussian function.
This method can replace
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
This method can replace
linear() and ease() with a gaussian interpolation.Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
number
|
The value to interpolate | ||
tMin |
number
|
<optional> |
0 | The minimum value of the initial range |
tMax |
number
|
<optional> |
1 | The maximum value of the initial range |
value1 |
number
|
<optional> |
0 | The minimum value of the interpolated result |
value2 |
number
|
<optional> |
1 | The maximum value of the interpolated result |
rate |
number
|
<optional> |
0 | The raising speed in the range [-1.0, 1.0]. |
the value.
number
# static "gaussianRateToBezierPoints"(rate) → {number}
Converts a Gaussian rate (as used with
gaussianInterpolation) to the closest possible Bézier controls for use with bezierInterpolation.
Parameters:
| Name | Type | Description |
|---|---|---|
rate |
number
|
The raising speed in the range [-1.0, 1.0]. |
the value.
number
# static "getCompScale"(lopt, topt) → {number}
Gets the "real" scale of a layer, resulting to its scale property, the scale of its parents, and it's location in Z-space if it's 3D.
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
l |
Layer
|
<optional> |
thisLayer | The layer |
t |
number
|
<optional> |
time | The time when to get the scale |
The scale ratio. This is not a percent, 1.0 is 100%.
number
# static "getEffectLayer"(fx, ind) → {Layer|null}
Gets a layer from a layer property in an effect, without generating an error if "None" is selected with the Legacy expression engine.
Parameters:
| Name | Type | Description |
|---|---|---|
fx |
Property
|
The effect |
ind |
int
|
string
|
The index or the name of the property |
The layer, or null if set to "None"
Layer
|
null
# static "getGroupTransformMatrix"(propopt) → {Matrix}
Gets the transformation Matrix for the current group in a shape layer, including the transformation from the ancestor groups
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
prop |
Property
|
<optional> |
thisProperty | The property from which to get the matrix |
- module:isLayer
- module:Matrix
The 2D Transform Matrix.
# static "getLayerCompPos"(topt, lopt) → {Array.<number>}
Gets the comp position (2D Projection in the comp) of a layer.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
number
|
<optional> |
time | Time from when to get the position |
l |
Layer
|
<optional> |
thisLayer | The layer |
The comp position
Array.<number>
# static "getLayerDistance"(other, originopt, topt) → {Array.<number>}
Gets the world position of a layer.
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
other |
Layer
|
The other layer | ||
origin |
Layer
|
<optional> |
thisLayer | The origin |
t |
number
|
<optional> |
time | Time from when to get the position |
- module:getLayerWorldPos
The world position
Array.<number>
# static "getLayerWorldPos"(topt, lopt) → {Array.<number>}
Gets the world position of a layer.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
number
|
<optional> |
time | Time from when to get the position |
l |
Layer
|
<optional> |
thisLayer | The layer |
The world position
Array.<number>
# static "getLayerWorldSpeed"(topt, lopt) → {number}
Gets the world instant speed of a layer.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
number
|
<optional> |
time | The time when to get the velocity |
l |
Layer
|
<optional> |
thisLayer | The layer |
- module:getLayerWorldVelocity
A positive number. The speed.
number
# static "getLayerWorldVelocity"(topt, lopt) → {Array.<number>}
Gets the world instant velocity of a layer.
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
number
|
<optional> |
time | The time when to get the velocity |
l |
Layer
|
<optional> |
thisLayer | The layer |
- module:getLayerWorldPos
The velocity.
Array.<number>
# static "getNextKey"(topt, propopt) → {Key|null}
Gets the key immediately before the given time
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
number
|
<optional> |
time | Time at which to get the key |
prop |
Property
|
<optional> |
thisProperty | The property from which to get the key |
The key, or null if there's no key before.
Key
|
null
# static "getNextStopKey"(topt, propopt) → {Key|null}
Gets the next key where there is no motion after it
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
number
|
<optional> |
time | Time at which to get the key |
prop |
Property
|
<optional> |
thisProperty | The property from which to get the key |
- module:isStill
- module:getNextKey
The key, or null if there's no key before.
Key
|
null
# static "getOrientation"(l) → {float}
Gets the world orientation of a (2D) layer.
Parameters:
| Name | Type | Description |
|---|---|---|
l |
Layer
|
The layer to get the orientation from |
- module:sign
The orientation, in degrees.
float
# static "getOrientationAtTime"(l, topt) → {float}
Gets the world orientation of a (2D) layer at a specific time.
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
l |
Layer
|
The layer to get the orientation from | ||
t |
float
|
<optional> |
time | The time at which to get the orientation |
The orientation, in degrees.
float
# static "getPath"() → {Object}
Gets the path from the current property at a given time.
A path object with three array attributes: points, inTangents, outTangents
Object
# static "getPrevKey"(topt, propopt) → {Key|null}
Gets the key immediately before the given time
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
number
|
<optional> |
time | Time at which to get the key |
prop |
Property
|
<optional> |
thisProperty | The property from which to get the key |
The key, or null if there's no key before.
Key
|
null
# static "getPrevStartKey"(topt, propopt) → {Key|null}
Gets the previous key where there is no motion before it
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
number
|
<optional> |
time | Time at which to get the key |
prop |
Property
|
<optional> |
thisProperty | The property from which to get the key |
- module:isStill
- module:getPrevKey
The key, or null if there's no key before.
Key
|
null
# static "getPropFromPath"(l, p) → {Property}
Gets a property from an array of indices as returned by getPropPath.
Parameters:
| Name | Type | Description |
|---|---|---|
l |
Layer
|
The layer containing the needed property |
p |
Array.<int>
|
The indices to the property. |
The property.
Property
# static "getPropPath"() → {Array.<int>}
Gets an array of all indices needed to get the current property from the layer level.
All indices to the property.
Array.<int>
# static "getPropWorldSpeed"(topt, propopt) → {Array.<number>}
Gets the world speed of a property.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
number
|
<optional> |
time | Time from when to get the position |
prop |
Layer
|
<optional> |
thisProperty | The property |
- module:getPropWorldVelocity
The world speed
Array.<number>
# static "getPropWorldValue"(topt, propopt) → {Array.<number>}
Gets the world coordinates of a property.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
number
|
<optional> |
time | Time from when to get the position |
prop |
Layer
|
<optional> |
thisProperty | The property |
- module:getLayerWorldPos
- module:isPosition
The world coordinates
Array.<number>
# static "getPropWorldVelocity"(topt, propopt) → {Array.<number>}
Gets the world velocity of a property.
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
number
|
<optional> |
time | Time from when to get the position |
prop |
Layer
|
<optional> |
thisProperty | The property |
- module:getPropWorldValue
The world velocity
Array.<number>
# static "getSameProp"(l) → {Property}
Gets the same property as the current one but from another layer.
Parameters:
| Name | Type | Description |
|---|---|---|
l |
Layer
|
The layer containing the needed property |
- module:getPropFromPath
- module:getPropPath
The property.
Property
# static "getScale"(l) → {Array.<float>}
Gets the world scale of a layer.
Parameters:
| Name | Type | Description |
|---|---|---|
l |
Layer
|
The layer to get the scale from |
The scale, in percent.
Array.<float>
# static "inside"(point, points) → {object}
Checks if a point is inside a given polygon.
Parameters:
| Name | Type | Description |
|---|---|---|
point |
Array.<float>
|
A 2D point [x, y] |
points |
Array.<Array.<float>>
|
The vertices of the polygon |
An object with two properties:
- `inside (bool)` is true if the point is inside the polygon
- `closestVertex` is the index of the closest vertex of the polygon
object
# static "integrateLinearKeys"(propopt)
Integrates the (linear) keyframe values. Useful to animate frequencies!
cf. http://www.motionscript.com/articles/speed-control.html for more explanation.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
prop |
Property
|
<optional> |
thisProperty | The property with the keyframes. |
# static "inverseGaussian"(v, minopt, maxopt, centeropt, fwhmopt) → {Array.<Number>}
The inverse gaussian function
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
v |
Number
|
The variable | ||
min |
Number
|
<optional> |
0 | The minimum return value of the corresponding gaussian function |
max |
Number
|
<optional> |
1 | The maximum return value of the corresponding gaussian function |
center |
Number
|
<optional> |
0 | The center of the peak of the corresponding gaussian function |
fwhm |
Number
|
<optional> |
1 | The full width at half maximum of the curve of the corresponding gaussian function |
The two possible results, the lower is the first in the list. If both are the same, it is the maximum
Array.<Number>
# static "inverseLogistic"(v, midValueopt, minopt, maxopt, rateopt) → {Number}
The inverse logistic function (inverse sigmoid)
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
v |
Number
|
The variable | ||
midValue |
Number
|
<optional> |
0 | The midpoint value, at which the function returns max/2 in the original logistic function |
min |
Number
|
<optional> |
0 | The minimum return value of the original logistic function |
max |
Number
|
<optional> |
1 | The maximum return value of the original logistic function |
rate |
Number
|
<optional> |
1 | The logistic growth rate or steepness of the original logistic function |
The result
Number
# static "isAfterLastKey"() → {boolean}
Checks if current time is after the time of the last key in the property
true if time is > lastkey.time
boolean
# static "isKeyTop"(k, axis) → {boolean}
Checks if the key is a maximum or minimum
Parameters:
| Name | Type | Description |
|---|---|---|
k |
Keyframe
|
The key to check |
axis |
int
|
The axis to check for multi-dimensionnal properties |
true if the key is a maximum or minimum
boolean
# static "isLayer"(prop) → {boolean}
Checks if a property is a layer. Useful when traversing up the property tree to stop when getting the layer.
Parameters:
| Name | Type | Description |
|---|---|---|
prop |
Property
|
The property to test |
true if the prop is a layer
boolean
# static "isLayerFlipped"(lopt) → {bool}
Checks if the layer has been flipped (scale sign is not the same on both axis).
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
l |
Layer
|
<optional> |
thisLayer | The layer |
- module:sign
Whether the layer is flipped
bool
# static "isPath"(prop) → {boolean}
Checks if a property is a path property.
Parameters:
| Name | Type | Description |
|---|---|---|
prop |
Property
|
The property |
true if the property is a path property.
boolean
# static "isPosition"(propopt) → {boolean}
Checks if a property is a transform.position property.
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
prop |
Property
|
<optional> |
thisProperty | The property |
true if the property is the transform.position property.
boolean
# static "isSpatial"(propopt) → {boolean}
Checks if a property is spatial
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
prop |
Property
|
<optional> |
thisProperty | The property to check |
true if the property is spatial.
boolean
# static "isStill"(topt, thresholdopt, axisopt) → {boolean}
Checks if the current property is animated at a given time.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
number
|
<optional> |
time | The time |
threshold |
number
|
<optional> |
0.01 | The speed under which the property is considered still. |
axis |
number
|
<optional> |
-1 | The axis to check. If < 0, will check all axis. |
true if the property does not vary.
boolean
# static "isZero"(x) → {Boolean}
Checks if the value is 0; works with arrays.
Parameters:
| Name | Type | Description |
|---|---|---|
x |
Number
|
Array.<Number>
|
The value(s) |
true if all values are 0.
Boolean
# static "lastActiveTime"(prop, t) → {float}
Checks the last previous time at which the property value was not 0. (meant to be used on boolean property, works on single dimension properties too).
Parameters:
| Name | Type | Description |
|---|---|---|
prop |
Property
|
The property to check |
t |
float
|
The time before which to run the check |
- module:getPrevKey
The last active time before t
float
# static "limit"(value, minopt, maxopt, softnessopt)
Clamps a value, but with a smooth interpolation according to a softness parameter
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
value |
number
|
Array.<number>
|
The value to limit | ||
min |
number
|
Array.<number>
|
null
|
<optional> |
The minimum value | |
max |
number
|
Array.<number>
|
null
|
<optional> |
The maximum value | |
softness |
number
|
<optional> |
0 | The softness, a value corresponding value, from which the interpolation begins to slow down |
# static "linearExtrapolation"(t, tMinopt, tMaxopt, value1opt, value2opt) → {number}
Interpolates a value with a linear function, but also extrapolates it outside of known values.
This method can replace
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
This method can replace
linear(), adding extrapolation.Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
number
|
The value to interpolate and extrapolate | ||
tMin |
number
|
<optional> |
0 | The minimum value of the initial range |
tMax |
number
|
<optional> |
1 | The maximum value of the initial range |
value1 |
number
|
<optional> |
0 | The minimum value of the interpolated result |
value2 |
number
|
<optional> |
1 | The maximum value of the interpolated result |
the value.
number
# static "logInterpolation"(t, tMinopt, tMaxopt, value1opt, value2opt, rateopt) → {number}
Interpolates a value with a logarithmic function.
This method can replace
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
This method can replace
linear() and ease() with a gaussian interpolation.Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
number
|
The value to interpolate | ||
tMin |
number
|
<optional> |
0 | The minimum value of the initial range |
tMax |
number
|
<optional> |
1 | The maximum value of the initial range |
value1 |
number
|
<optional> |
0 | The minimum value of the interpolated result |
value2 |
number
|
<optional> |
1 | The maximum value of the interpolated result |
rate |
number
|
<optional> |
1 | The raising speed in the range [0, inf]. |
- module:linearExtrapolation
the value.
number
# static "logistic"(value, midValueopt, minopt, maxopt, rateopt) → {Number}
The logistic function (sigmoid)
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
value |
Number
|
The value | ||
midValue |
Number
|
<optional> |
0 | The midpoint value, at which the function returns max/2 |
min |
Number
|
<optional> |
0 | The minimum return value |
max |
Number
|
<optional> |
1 | The maximum return value |
rate |
Number
|
<optional> |
1 | The logistic growth rate or steepness of the function |
The result in the range [min, max] (excluding min and max)
Number
# static "logisticInterpolation"(t, tMinopt, tMaxopt, value1opt, value2opt, rateopt, tMidopt) → {number}
Interpolates a value with a logistic (sigmoid) function.
This method can replace
This method can replace
linear() and ease() with a gaussian interpolation.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
number
|
The value to interpolate | ||
tMin |
number
|
<optional> |
0 | The minimum value of the initial range |
tMax |
number
|
<optional> |
1 | The maximum value of the initial range |
value1 |
number
|
<optional> |
0 | The minimum value of the interpolated result |
value2 |
number
|
<optional> |
1 | The maximum value of the interpolated result |
rate |
number
|
<optional> |
1 | The raising speed in the range [0, inf]. |
tMid |
number
|
<optional> |
The t value at which the interpolated value should be half way. By default, (tMin+tMax)/2 |
- module:logistic
- module:linearExtrapolation
the value.s
number
# static "mean"(values) → {Number}
Returns the mean of a set of values
Parameters:
| Name | Type | Description |
|---|---|---|
values |
Array.<Number>
|
The values |
The mean
Number
# static "multPath"(path, weight) → {Object}
Multiplies a path with a scalar.
The path must be an object with three array attributes: points, inTangents, outTangents
The path must be an object with three array attributes: points, inTangents, outTangents
Parameters:
| Name | Type | Description |
|---|---|---|
path |
Object
|
The path |
weight |
float
|
The multipliers |
- module:multPoints
A path object with three array attributes: points, inTangents, outTangents
Object
# static "multPoints"(p, w) → {Array.<Array.<float>>}
Multiplies a list of points/vectors with a scalar.
Parameters:
| Name | Type | Description |
|---|---|---|
p |
Array.<Array.<float>>
|
The list of points |
w |
float
|
The multiplier |
The multiplied points
Array.<Array.<float>>
# static "nextActiveTime"(prop, t) → {float}
Checks the next time at which the property value was not 0. (meant to be used on boolean property, works on single dimension properties too).
Parameters:
| Name | Type | Description |
|---|---|---|
prop |
Property
|
The property to check |
t |
float
|
The time after which to run the check |
- module:getNextKey
The next active time after t
float
# static "normalizeWeights"(weights, sumopt) → {Array.<float>}
Normalizes a list of weights so their sum equals 1.0
Parameters:
| Name | Type | Attributes | Description |
|---|---|---|---|
weights |
Array.<float>
|
The weights to normalize | |
sum |
float
|
<optional> |
The sum of the weights; provide it if it's already computed to improve performance. |
The normalized weights
Array.<float>
# static "overshoot"(t, elasticity, damping, vAtTimeopt) → {float|Array.<float>}
Overshoot animation, to be used when the speed is 0.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
float
|
The time at which the value must be got. To end the loop, pass the same time for all subsequent frames. | ||
elasticity |
float
|
The elasticity, which controls the amplitude and frequence according to the last known velocity | ||
damping |
float
|
Damping | ||
vAtTime |
function
|
<optional> |
valueAtTime | A function to replace valueAtTime. Use this to loop after an expression+keyframe controlled animation, by providing a function used to generate the animation. |
- module:getPrevKey
The new value
float
|
Array.<float>
# static "pingPongIn"(t, nK, vAtTimeopt, dampingopt) → {float}
Animatable equivalent to loopIn('pingpong').
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
float
|
The time at which the value must be got. To end the loop, pass the same time for all previous frames. | ||
nK |
int
|
The number of keyframes to loop. Use 0 to loop all keyframes | ||
vAtTime |
function
|
<optional> |
valueAtTime | A function to replace valueAtTime. Use this to loop after an expression+keyframe controlled animation, by providing a function used to generate the animation. |
damping |
float
|
<optional> |
0 | Exponentially attenuates the effect over time |
- module:getNextKey
The new value
float
# static "pingPongOut"(t, nK, vAtTimeopt, dampingopt) → {float}
Animatable equivalent to loopOut('pingpong').
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
t |
float
|
The time at which the value must be got. To end the loop, pass the same time for all subsequent frames. | ||
nK |
int
|
The number of keyframes to loop. Use 0 to loop all keyframes | ||
vAtTime |
function
|
<optional> |
valueAtTime | A function to replace valueAtTime. Use this to loop after an expression+keyframe controlled animation, by providing a function used to generate the animation. |
damping |
float
|
<optional> |
0 | Exponentially attenuates the effect over time |
- module:getPrevKey
The new value
float
# static "pointsToWorld"(points, layer) → {Array.<Array.<float>>}
Transform the points from layer to world coordinates
Parameters:
| Name | Type | Description |
|---|---|---|
points |
Array.<Array.<float>>
|
The points |
layer |
Layer
|
The layer |
The points in world coordinates
Array.<Array.<float>>
# static "shapePointsToLayer"(prop) → {Array.<Array.<float>>}
Gets the points of the shape path in layer coordinates (applies the group transform)
Parameters:
| Name | Type | Description |
|---|---|---|
prop |
Property
|
The property from which to get the path |
- module:getGroupTransformMatrix
The points in layer coordinates
Array.<Array.<float>>
# static "subPath"(path1, path2, path2weight) → {Object}
Substracts two paths together.
The paths must be objects with three array attributes: points, inTangents, outTangents
The paths must be objects with three array attributes: points, inTangents, outTangents
Parameters:
| Name | Type | Description |
|---|---|---|
path1 |
Object
|
First path |
path2 |
Object
|
Second path |
path2weight |
float
|
A weight to multiply the second path values |
- module:subPoints
A path object with three array attributes: points, inTangents, outTangents
Object
# static "subPoints"(p1, p2, w) → {Array.<Array.<float>>}
Substracts two lists of points/vectors.
Parameters:
| Name | Type | Description |
|---|---|---|
p1 |
Array.<Array.<float>>
|
The list of points |
p2 |
Array.<Array.<float>>
|
The other list of points |
w |
float
|
A weight to multiply the values of p2 |
The substracted points
Array.<Array.<float>>
# static "translatePointWithLayer"(l, pointopt, startTopt, endTopt) → {Array.<float>}
Translates a point with a layer, as if it was parented to it.
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Note that for performance reasons with expressions, even if the parameters of the function are documented with optional/default values, you MUST provide ALL the arguments when using them.
Parameters:
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
l |
Layer
|
The layer to get the translation from. | ||
point |
Array.<float>
|
<optional> |
[0,0] | The [X,Y] point to translate (using world coordinates). |
startT |
float
|
<optional> |
0 | The start time of the translation |
endT |
float
|
<optional> |
time | The end time of the translation |
The coordinates of the translated point.
Array.<float>
# static "zero"() → {any}
Generates a "zero" value for the current property, i.e.
Note that for path properties, this method returns a path object with three array attributes: points, inTangents, outTangents.
0 or [0,0], etc. according to the property type.Note that for path properties, this method returns a path object with three array attributes: points, inTangents, outTangents.
The zero value.
any
# static get(functions) → {string}
Gets functions and their dependencies from the library.
Parameters:
| Name | Type | Description |
|---|---|---|
functions |
Array.<string>
|
The name of the functions to get |
The expression
string
# static getRequirements(functionName) → {Array.<string>}
A recursive method to get all the requirements (dependencies) of a function from a library
Parameters:
| Name | Type | Description |
|---|---|---|
functionName |
string
|
The name of the function |
The names of the required functions, including the querried one
Array.<string>