jabble.indicators
Class FieldFunctionField

java.lang.Object
  jabble.indicators.FieldFunctionField

All Implemented Interfaces:

FunctionField

public class FieldFunctionField
extends java.lang.Object
implements FunctionField

Returns the value of a field at a point.

Constructor Summary

FieldFunctionField(java.lang.String fieldName)

Method Summary

double	calculateAt(Point point) Calculates the expression at a given point.
void	setupFields(java.util.List<Slice> slices) Sets the set of slices on which the expression will be calculated.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FieldFunctionField

public FieldFunctionField(java.lang.String fieldName)

Method Detail

setupFields

public void setupFields(java.util.List<Slice> slices)

Description copied from interface: FunctionField

Sets the set of slices on which the expression will be calculated. The implementation of this method should extract all the fields and constants that are going to be needed for calculateAt().

Specified by:

setupFields in interface FunctionField

Parameters:

slices - a list of slices in reverse evolution order (newest first)

calculateAt

public double calculateAt(Point point)

Description copied from interface: FunctionField

Calculates the expression at a given point.

Specified by:

calculateAt in interface FunctionField

Parameters:

point - the Point at which the expression is calculated.

Returns:

the value of the expression.