Interpolant.html.md 2.5 KB
Interpolant
Abstract base class of interpolants over parametric samples.
The parameter domain is one dimensional, typically the time or a path along a curve defined by the data.
The sample values can have any dimensionality and derived classes may apply special interpretations to the data.
This class provides the interval seek in a Template Method, deferring the actual interpolation to derived classes.
Time complexity is O(1) for linear access crossing at most two points and O(log N) for random access, where N is the number of positions.
References: http://www.oodesign.com/template-method-pattern.html
Constructor
new Interpolant( parameterPositions : TypedArray, sampleValues : TypedArray, sampleSize : number, resultBuffer : TypedArray ) (abstract)
Constructs a new interpolant.
parameterPositions
The parameter positions hold the interpolation factors.
sampleValues
The sample values.
sampleSize
The sample size
resultBuffer
The result buffer.
Properties
.DefaultSettings_ : Object
The default settings object.
.parameterPositions : TypedArray
The parameter positions.
.resultBuffer : TypedArray
The result buffer.
.sampleValues : TypedArray
The sample values.
.settings : Object
The interpolation settings.
Default is null.
.valueSize : TypedArray
The value size.
Methods
.copySampleValue_( index : number ) : TypedArray
Copies a sample value to the result buffer.
index
An index into the sample value buffer.
Returns: The result buffer.
.evaluate( t : number ) : TypedArray
Evaluate the interpolant at position t.
t
The interpolation factor.
Returns: The result buffer.
.getSettings_() : Object
Returns the interpolation settings.
Returns: The interpolation settings.
.interpolate_( i1 : number, t0 : number, t : number, t1 : number ) : TypedArray (abstract)
Copies a sample value to the result buffer.
i1
An index into the sample value buffer.
t0
The previous interpolation factor.
t
The current interpolation factor.
t1
The next interpolation factor.
Returns: The result buffer.
.intervalChanged_( i1 : number, t0 : number, t : number )
Optional method that is executed when the interval has changed.
i1
An index into the sample value buffer.
t0
The previous interpolation factor.
t
The current interpolation factor.