Class SplineData<T>

The SplineData{T} class is used to store information relative to a Spline without coupling data directly to the Spline class. SplineData can store any type of data, and provides options for how to index DataPoints.

Inheritance

Object

SplineData<T>

Namespace: UnityEngine.Splines

Syntax

public class SplineData<T> : IEnumerable<DataPoint<T>>

Type Parameters

Name	Description
T	The type of data to store.

Constructors

SplineData()

Create a new SplineData instance.

Declaration

public SplineData()

SplineData(T)

Create a new SplineData instance with a single value in it.

Declaration

public SplineData(T init)

Parameters

Type	Name	Description
T	init	A single value to add to the spline data at t = 0.`

SplineData(IEnumerable<DataPoint<T>>)

Create a new SplineData instance and initialize it with a collection of data points. DataPoints will be sorted and stored in ascending order by Index.

Declaration

public SplineData(IEnumerable<DataPoint<T>> dataPoints)

Parameters

Type	Name	Description
IEnumerable<DataPoint<T>>	dataPoints	A collection of DataPoints to initialize SplineData.`

Properties

Count

How many data points the SplineData collection contains.

Declaration

public int Count { get; }

Property Value

Type	Description
Int32

Indexes

The DataPoint Indexes of the current SplineData.

Declaration

public IEnumerable<float> Indexes { get; }

Property Value

Type	Description
IEnumerable<Single>

Item[Int32]

Access a DataPoint<TDataType> by index. DataPoints are sorted in ascending order by the Index value.

Declaration

public DataPoint<T> this[int index] { get; set; }

Parameters

Type	Name	Description
Int32	index	The index of the DataPoint to access.

Property Value

Type	Description
DataPoint<T>

PathIndexUnit

PathIndexUnit defines how SplineData will interpret 't' values when interpolating data.

Declaration

public PathIndexUnit PathIndexUnit { get; set; }

Property Value

Type	Description
PathIndexUnit

See Also

PathIndexUnit

Methods

Add(Single, T)

Append a DataPoint<TDataType> to this collection.

Declaration

public void Add(float t, T data)

Parameters

Type	Name	Description
Single	t	The interpolant relative to Spline. How this value is interpreted is dependent on UnityEngine.Splines.SplineData`1.get_PathIndexUnit.
T	data	The data to store in the created data point.

Add(DataPoint<T>)

Append a DataPoint<TDataType> to this collection.

Declaration

public int Add(DataPoint<T> dataPoint)

Parameters

Type	Name	Description
DataPoint<T>	dataPoint	The data point to append to the SplineData collection.

Returns

Type	Description
Int32	The index of the inserted dataPoint.

AddDataPointWithDefaultValue(Single)

Append a DataPoint<TDataType> with default value to this collection.

Declaration

public int AddDataPointWithDefaultValue(float t)

Parameters

Type	Name	Description
Single	t	The interpolant relative to Spline. How this value is interpreted is dependent on UnityEngine.Splines.SplineData`1.get_PathIndexUnit.

Returns

Type	Description
Int32	The index of the inserted dataPoint.

Clear()

Remove all data points.

Declaration

public void Clear()

ConvertPathUnit<TSplineType>(TSplineType, PathIndexUnit)

Given a spline and a target PathIndex Unit, convert the SplineData to a new PathIndexUnit without changing the final positions on the Spline.

Declaration

public void ConvertPathUnit<TSplineType>(TSplineType spline, PathIndexUnit toUnit)
    where TSplineType : ISpline

Parameters

Type	Name	Description
TSplineType	spline	The Spline to use for the conversion, this is necessary to compute most of PathIndexUnits.
PathIndexUnit	toUnit	The unit to convert SplineData to.

Type Parameters

Name	Description
TSplineType	The Spline type.

Evaluate<TSpline, TInterpolator>(TSpline, Single, TInterpolator)

Calculate an interpolated value at a given 't' along a spline.

Declaration

public T Evaluate<TSpline, TInterpolator>(TSpline spline, float t, TInterpolator interpolator)
    where TSpline : ISpline where TInterpolator : IInterpolator<T>

Parameters

Type	Name	Description
TSpline	spline	The Spline to interpolate.
Single	t	The interpolator value. How this is interpreted is defined by PathIndexUnit.
TInterpolator	interpolator	The IInterpolator<T> to use. A collection of commonly used interpolators are available in the UnityEngine.Splines.Interpolators namespace.

Returns

Type	Description
T	An interpolated value.

Type Parameters

Name	Description
TSpline	The Spline type.
TInterpolator	The IInterpolator type.

Evaluate<TSpline, TInterpolator>(TSpline, Single, PathIndexUnit, TInterpolator)

Calculate an interpolated value at a given 't' along a spline.

Declaration

public T Evaluate<TSpline, TInterpolator>(TSpline spline, float t, PathIndexUnit indexUnit, TInterpolator interpolator)
    where TSpline : ISpline where TInterpolator : IInterpolator<T>

Parameters

Type	Name	Description
TSpline	spline	The Spline to interpolate.
Single	t	The interpolator value. How this is interpreted is defined by PathIndexUnit.
PathIndexUnit	indexUnit	The PathIndexUnit that t is represented as.
TInterpolator	interpolator	The IInterpolator<T> to use. A collection of commonly used interpolators are available in the UnityEngine.Splines.Interpolators namespace.

Returns

Type	Description
T	An interpolated value.

Type Parameters

Name	Description
TSpline	The Spline type.
TInterpolator	The IInterpolator type.

GetEnumerator()

Returns an enumerator that iterates through the DataPoints collection.

Declaration

public IEnumerator<DataPoint<T>> GetEnumerator()

Returns

Type	Description
IEnumerator<DataPoint<T>>	An IEnumerator{DataPoint{T}} for this collection.

GetNormalizedInterpolation<TSplineType>(TSplineType, Single)

Given a time value using a certain PathIndexUnit type, calculate the normalized time value regarding a specific spline.

Declaration

public float GetNormalizedInterpolation<TSplineType>(TSplineType spline, float t)
    where TSplineType : ISpline

Parameters

Type	Name	Description
TSplineType	spline	The Spline to use for the conversion, this is necessary to compute Normalized and Distance PathIndexUnits.
Single	t	The time to normalize in the original PathIndexUnit.

Returns

Type	Description
Single	The normalized time.

Type Parameters

Name	Description
TSplineType	The Spline type.

MoveDataPoint(Int32, Single)

Move a DataPoint<TDataType> (if it exists) from this collection, from one index to the another.

Declaration

public int MoveDataPoint(int index, float newIndex)

Parameters

Type	Name	Description
Int32	index	The index of the DataPoint<TDataType> to move.
Single	newIndex	The new index for this DataPoint<TDataType>.

Returns

Type	Description
Int32	The index of the modified DataPoint<TDataType>.

RemoveAt(Int32)

Remove a DataPoint<TDataType> at index.

Declaration

public void RemoveAt(int index)

Parameters

Type	Name	Description
Int32	index	The index to remove.

RemoveDataPoint(Single)

Remove a DataPoint<TDataType> from this collection, if one exists.

Declaration

public bool RemoveDataPoint(float t)

Parameters

Type	Name	Description
Single	t	The interpolant relative to Spline. How this value is interpreted is dependent on UnityEngine.Splines.SplineData`1.get_PathIndexUnit.

Returns

Type	Description
Boolean	True is deleted, false otherwise.

SetDataPoint(Int32, DataPoint<T>)

Set the data for a DataPoint<TDataType> at an index.

Declaration

public void SetDataPoint(int index, DataPoint<T> value)

Parameters

Type	Name	Description
Int32	index	The DataPoint index.
DataPoint<T>	value	The value to set.

Remarks

Using this method will search the DataPoint list and invoke the changed callback every time. This may be inconvenient when setting multiple DataPoints during the same frame. In this case, consider calling SetDataPointNoSort(Int32, DataPoint<T>) for each DataPoint, followed by a single call to SortIfNecessary(). Note that the call to SortIfNecessary() is optional and can be omitted if DataPoint sorting is not required and the changed callback should not be invoked.

SetDataPointNoSort(Int32, DataPoint<T>)

Set the data for a DataPoint<TDataType> at an index.

Declaration

public void SetDataPointNoSort(int index, DataPoint<T> value)

Parameters

Type	Name	Description
Int32	index	The DataPoint index.
DataPoint<T>	value	The value to set.

Remarks

Use this method as an altenative to SetDataPoint(Int32, DataPoint<T>) when manual control over DataPoint sorting and the changed callback is required. See also SortIfNecessary().

SortIfNecessary()

Triggers sorting of the DataPoint<TDataType> list if the data is dirty.

Declaration

public void SortIfNecessary()

Remarks

Call this after a single or series of calls to SetDataPointNoSort(Int32, DataPoint<T>). This will trigger DataPoint sort and invoke the changed callback. This method has two main use cases: to prevent frequent changed callback calls within the same frame and to reduce multiple DataPoints list searches to a single sort in performance critical paths.

Events

changed

Invoked any time a SplineData is modified.

Declaration

public event Action changed

Event Type

Type	Description
Action

Remarks

In the editor this can be invoked many times per-frame. Prefer to use RegisterSplineDataChanged<T>(Action<SplineData<T>>) when working with splines in the editor.