com.luciad.tea.hypsometry

Terrain Analysis EngineClass TLcdHypsometric3x3NormalProvider

java.lang.Object

com.luciad.tea.hypsometry.TLcdHypsometric3x3NormalProvider

All Implemented Interfaces:

ILcdHypsometricNormalProvider

public class TLcdHypsometric3x3NormalProvider
extends Object
implements ILcdHypsometricNormalProvider

This ILcdHypsometricNormalProvider estimates normals based on 3x3 neighboring elevation values.

Constructor Summary

Constructors

Constructor and Description
TLcdHypsometric3x3NormalProvider()

Method Summary

Modifier and Type	Method and Description
void	computeNormal(ILcdMatrixView aMatrixView, int aX, int aY, double aElevationScale, double[] aNormalSFCT) Computes the normal at the given point.
Rectangle	getFootPrint() Returns the rectangle (-1, -1, 3, 3).

Methods inherited from class java.lang.Object

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

Constructor Detail

TLcdHypsometric3x3NormalProvider

public TLcdHypsometric3x3NormalProvider()

Method Detail

getFootPrint

public Rectangle getFootPrint()

Returns the rectangle (-1, -1, 3, 3).

Specified by:

getFootPrint in interface ILcdHypsometricNormalProvider

Returns:

the foot print of this provider.

computeNormal

public void computeNormal(ILcdMatrixView aMatrixView,
                          int aX,
                          int aY,
                          double aElevationScale,
                          double[] aNormalSFCT)

Description copied from interface: ILcdHypsometricNormalProvider

Computes the normal at the given point. For reasons of efficiency, the normals are not necessarily normalized yet. It is up to the user to normalize them if necessary. The components of the normal may be NaN if they can't be computed, for instance if not all required elevations are known.

Specified by:

computeNormal in interface ILcdHypsometricNormalProvider

Parameters:

aMatrixView - the matrix containing elevation values.

aX - the x ordinate in the matrix.

aY - the y ordinate in the matrix.

aElevationScale - the scale of the elevation values in the tiles, expressed in matrix distance units per tile elevation unit.

aNormalSFCT - an array of 3 doubles to store the computed normal.