## Interface BoundSurfaceInterpolator

• public interface BoundSurfaceInterpolator
A surface interpolator that has been bound to a specific surface.

A bound interpolator is created from a SurfaceInterpolator. The bind process takes the definition of the interpolator and combines it with the x-y-z values. This allows implementations to optimize interpolation calculations.

• ### Method Summary

All Methods
Modifier and Type Method Description
ValueDerivatives firstPartialDerivatives​(double x, double y)
Computes the partial derivatives of the surface.
double interpolate​(double x, double y)
Computes the z-value for the specified x-y-value by interpolation.
DoubleArray parameterSensitivity​(double x, double y)
Computes the sensitivity of the x-y-value with respect to the surface parameters.
• ### Method Detail

• #### interpolate

double interpolate​(double x,
double y)
Computes the z-value for the specified x-y-value by interpolation.
Parameters:
x - the x-value to find the z-value for
y - the y-value to find the z-value for
Returns:
the value at the x-y-value
Throws:
RuntimeException - if the z-value cannot be calculated
• #### firstPartialDerivatives

ValueDerivatives firstPartialDerivatives​(double x,
double y)
Computes the partial derivatives of the surface.

The first derivatives are dz/dx and dz/dy. The derivatives are in the following order:

•  derivative with respect to x
•  derivative with respect to y
Parameters:
x - the x-value at which the partial derivative is taken
y - the y-value at which the partial derivative is taken
Returns:
the z-value and it's partial first derivatives
Throws:
RuntimeException - if the derivative cannot be calculated
• #### parameterSensitivity

DoubleArray parameterSensitivity​(double x,
double y)
Computes the sensitivity of the x-y-value with respect to the surface parameters.

This returns an array with one element for each parameter of the surface. The array contains the sensitivity of the z-value at the specified x-y-value to each parameter.

Parameters:
x - the x-value at which the parameter sensitivity is computed
y - the y-value at which the parameter sensitivity is computed
Returns:
the sensitivity
Throws:
RuntimeException - if the sensitivity cannot be calculated