Package com.ardor3d.util.geom

Class NonIndexedNormalGenerator

java.lang.Object

com.ardor3d.util.geom.NonIndexedNormalGenerator

public class NonIndexedNormalGenerator
extends Object

A utility class to generate normals for a set of vertices. The triangles must be defined by just the vertices, so that every 3 consecutive vertices define one triangle. However, an index array must be specified to identify identical vertices properly (see method generateNormals(double[], int[], double). If the index aray is not specified, the vertex normals are currently simply taken from the faces they belong to (this might be changed in the future, so that vertices are compared by their values).

Constructor Summary

Constructors

Constructor	Description
NonIndexedNormalGenerator()

Method Summary

Modifier and Type	Method	Description
double[]	generateNormals(double[] vertices, int[] indices, double creaseAngle)	Calculates the normals for a set of faces determined by the specified vertices.
void	generateNormals(Mesh mesh)

Methods inherited from class java.lang.Object

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

Constructor Details

NonIndexedNormalGenerator

public NonIndexedNormalGenerator()

Method Details

generateNormals

public double[] generateNormals(double[] vertices,
 int[] indices,
 double creaseAngle)

Calculates the normals for a set of faces determined by the specified vertices. Every 3 consecutive vertices define one triangle.
Please note: This method uses class fields and is not synchronized! Therefore it should only be called from a single thread, unless synchronization is taken care of externally.

Parameters:

vertices - The vertex coordinates. Every three values define one vertex

indices - An array containing int values. Each value belongs to one vertex in the vertices array, the values are stored in the same order as the vertices. For equal vertices in the vertices array, the indices are also equal.

creaseAngle - The maximum angle in radians between faces to which normals between the faces are interpolated to create a smooth transition

Returns:

An array containing the generated normals for the geometry

generateNormals

public void generateNormals(Mesh mesh)