QuaternionSpline - SuperMap3D Documentation

QuaternionSpline

A spline that uses spherical quadrangle (squad) interpolation to create a quaternion curve. The generated curve is in the class C¹.

Name Type Description

options

Object

Object with the following properties:

Name	Type	Description
`times`	Array.<Number>	An array of strictly increasing, unit-less, floating-point times at each point. The values are in no way connected to the clock time. They are the parameterization for the curve.
`points`	Array.<Quaternion>	The array of `Quaternion` control points.
`firstInnerQuadrangle`	Quaternion	optional The inner quadrangle of the curve at the first control point. If the inner quadrangle is not given, it will be estimated.
`lastInnerQuadrangle`	Quaternion	optional The inner quadrangle of the curve at the last control point. If the inner quadrangle is not given, it will be estimated.

readonlyinnerQuadrangles : Array.<Quaternion>

An array of Quaternion inner quadrangles for the control points.

readonlypoints : Array.<Quaternion>

An array of Quaternion control points.

readonlytimes : Array.<Number>

An array of times for the control points.

evaluate(time, result) → Quaternion

Evaluates the curve at a given time.

Name	Type	Description
`time`	Number	The time at which to evaluate the curve.
`result`	Quaternion	optional The object onto which to store the result.

The modified result parameter or a new instance of the point on the curve at the given time.

DeveloperError : time must be in the range [t₀, t_n], where t₀ is the first element in the array times and t_n is the last element in the array times.

findTimeInterval(time) → Number

Finds an index i in times such that the parameter time is in the interval [times[i], times[i + 1]].

Name	Type	Description
`time`	Number	The time.

The index for the element at the start of the interval.

DeveloperError : time must be in the range [t₀, t_n], where t₀ is the first element in the array times and t_n is the last element in the array times.