CubicSplineSegment (Java 3D Javadocs 0-SNAPSHOT API)

java.lang.Object
- org.scijava.java3d.utils.behaviors.interpolators.CubicSplineSegment

```
public class CubicSplineSegment
extends Object
```
The CubicSplineSegment class creates the representation of a TCB (Kochanek-Bartels Spline). This class takes 4 key frames as its input (using TCBKeyFrame). If interpolating between the i^th and (i+1)^th key frame then the four key frames that need to be specified are the (i-1)^th, i^th, (i+1)^th and (i+2)^th keyframes in order. The CubicSegmentClass then pre-computes the hermite interpolation basis coefficients if the (i+1)^th frame has the linear flag set to zero. These are used to calculate the interpolated position, scale and quaternions when they requested by the user using the getInterpolated* methods. If the the (i+1)^th frame's linear flag is set to 1 then the class uses linear interpolation to calculate the interpolated position, sccale and quaternions it returns through the getInterpolated* methods.

Since:

Java3D 1.1

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`float`	`computeLength(float u)` Computes the length of the curve at a given point between key frames.
`void`	`getInterpolatedPosition(float u, Point3f newPos)` Computes the interpolated position along the curve at a given point between key frames and returns a Point3f with the interpolated x, y, and z scale components.
`void`	`getInterpolatedPositionVector(float u, Vector3f newPos)` Computes the interpolated position along the curve at a given point between key frames and returns a Vector3f with the interpolated x, y, and z scale components.
`void`	`getInterpolatedQuaternion(float u, Quat4f newQuat)` Computes the interpolated quaternion along the curve at a given point between key frames.
`void`	`getInterpolatedScale(float u, Point3f newScale)` Computes the interpolated scale along the curve at a given point between key frames and returns a Point3f with the interpolated x, y, and z scale components.
`float`	`getInterpolatedValue(float u)` Computes the ratio of the length of the spline from the i^th key frame to the position specified by u to the length of the entire spline segment from the i^th key frame to the (i+1) ^th key frame.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - computeLength
```
public float computeLength(float u)
```
    Computes the length of the curve at a given point between key frames.
    
    Parameters:
    
    u - specifies the point between keyframes where 0 <= u <= 1.
  - getInterpolatedQuaternion
```
public void getInterpolatedQuaternion(float u,
                                      Quat4f newQuat)
```
    Computes the interpolated quaternion along the curve at a given point between key frames. This routine uses linear interpolation if the (i+1)^th key frame's linear value is equal to 1.
    
    Parameters:
    
    u - specifies the point between keyframes where 0 <= u <= 1.
    
    newQuat - returns the value of the interpolated quaternion
  - getInterpolatedScale
```
public void getInterpolatedScale(float u,
                                 Point3f newScale)
```
    Computes the interpolated scale along the curve at a given point between key frames and returns a Point3f with the interpolated x, y, and z scale components. This routine uses linear interpolation if the (i+1)^th key frame's linear value is equal to 1.
    
    Parameters:
    
    u - specifies the point between keyframes where 0 <= u <= 1.
    
    newScale - returns the interpolated x,y,z scale value in a Point3f
  - getInterpolatedPosition
```
public void getInterpolatedPosition(float u,
                                    Point3f newPos)
```
    Computes the interpolated position along the curve at a given point between key frames and returns a Point3f with the interpolated x, y, and z scale components. This routine uses linear interpolation if the (i+1)^th key frame's linear value is equal to 1.
    
    Parameters:
    
    u - specifies the point between keyframes where 0 <= u <= 1.
    
    newPos - returns the interpolated x,y,z position in a Point3f
  - getInterpolatedPositionVector
```
public void getInterpolatedPositionVector(float u,
                                          Vector3f newPos)
```
    Computes the interpolated position along the curve at a given point between key frames and returns a Vector3f with the interpolated x, y, and z scale components. This routine uses linear interpolation if the (i+1)^th key frame's linear value is equal to 1.
    
    Parameters:
    
    u - specifies the point between keyframes where 0 <= u <= 1.
    
    newPos - returns the interpolated x,y,z position in a Vector3f.
  - getInterpolatedValue
```
public float getInterpolatedValue(float u)
```
    Computes the ratio of the length of the spline from the i^th key frame to the position specified by u to the length of the entire spline segment from the i^th key frame to the (i+1) ^th key frame. When the (i+1)^th key frame's linear value is equal to 1, this is meaninful otherwise it should return u.
    
    Parameters:
    
    u - specifies the point between keyframes where 0 <= u <= 1.
    
    Returns:
    
    the interpolated ratio

Class CubicSplineSegment

Method Summary

Methods inherited from class java.lang.Object

Method Detail

computeLength

getInterpolatedQuaternion

getInterpolatedScale

getInterpolatedPosition

getInterpolatedPositionVector

getInterpolatedValue