Package net.imglib2.mesh.util

Class MeshUtil

java.lang.Object

net.imglib2.mesh.util.MeshUtil

public class MeshUtil
extends Object

Constructor Summary

Constructors

Constructor	Description
MeshUtil()

Method Summary

Modifier and Type	Method	Description
static void	cross(double x1, double y1, double z1, double x2, double y2, double z2, double[] out)	Cross product between vectors V1 and V2.
static double	dotProduct(double x1, double y1, double z1, double x2, double y2, double z2)	Dot product between vectors V1 and V2.
static long	edgeID(int v1, int v2)	Builds a unique id for an edge between the two specified vertices.
static String	edgeStr(long l)
static int	edgeV1(long l)	Returns the id of the first vertex of the specified edge.
static int	edgeV2(long l)	Returns the id of the second vertex of the specified edge.
static double	maxZ(Vertices vertices, long v0, long v1, long v2, double eps)	Return the maximal Z value of a given triangle, rounded to twice the specified scale.
static double	minZ(Vertices vertices, long v0, long v1, long v2, double eps)	Return the minimal Z value of a given triangle, rounded to twice the specified scale.
static double	mround(double v, double eps, int mod, int rem)	Rounds a position to a multiple of small number, plus reminder.
static String	triangleStr(Mesh mesh, long id)	Produces a string representation of a triangle.

Methods inherited from class java.lang.Object

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

Constructor Detail

MeshUtil

public MeshUtil()

Method Detail

dotProduct

public static final double dotProduct(double x1,
                                      double y1,
                                      double z1,
                                      double x2,
                                      double y2,
                                      double z2)

Dot product between vectors V1 and V2.

Parameters:

x1 -

y1 -

z1 -

x2 -

y2 -

z2 -

Returns:

cross

public static final void cross(double x1,
                               double y1,
                               double z1,
                               double x2,
                               double y2,
                               double z2,
                               double[] out)

Cross product between vectors V1 and V2. Stores the results in the specified double array.

Parameters:

x1 -

y1 -

z1 -

x2 -

y2 -

z2 -

out - a double array of size at least 3 to store the coordinates of resulting vector.

edgeID

public static final long edgeID(int v1,
                                int v2)

Builds a unique id for an edge between the two specified vertices. Such an edge is undirected; the edge v1->v2 and v2->v1 have the the same id.

Parameters:

v1 - the id of the first vertex.

v2 - the id of the second vertex.

Returns:

the edge id, as a long.

edgeV1

public static final int edgeV1(long l)

Returns the id of the first vertex of the specified edge.

Parameters:

l - the edge id.

Returns:

the first vertex id, as an int.

edgeV2

public static final int edgeV2(long l)

Returns the id of the second vertex of the specified edge.

Parameters:

l - the edge id.

Returns:

the second vertex id, as an int.

edgeStr

public static final String edgeStr(long l)

mround

public static final double mround(double v,
                                  double eps,
                                  int mod,
                                  int rem)

Rounds a position to a multiple of small number, plus reminder. This is used typically to ensure a ray will not cross a vertex in a mesh, causing a singularity.

Parameters:

v - the value to round.

eps - the scale to round to.

mod - the number of time eps to round. For instance if you put 2, everything will be a multiple of 2*eps.

rem - the remainder to add to the rounded value. For instance if you put a remainder of 1 and a mod of, all values will be rounded to 2 times eps + eps.

Returns:

the rounded value.

minZ

public static final double minZ(Vertices vertices,
                                long v0,
                                long v1,
                                long v2,
                                double eps)

Return the minimal Z value of a given triangle, rounded to twice the specified scale.

Parameters:

vertices - the vertices structure.

v0 - the triangle first vertex.

v1 - the triangle second vertex.

v2 - the triangle third vertex. Order does not matter.

eps - the rounding scale.

Returns:

the minimal Z value of the triangle, rounded to twice the specified scale.

maxZ

public static final double maxZ(Vertices vertices,
                                long v0,
                                long v1,
                                long v2,
                                double eps)

Return the maximal Z value of a given triangle, rounded to twice the specified scale.

Parameters:

vertices - the vertices structure.

v0 - the triangle first vertex.

v1 - the triangle second vertex.

v2 - the triangle third vertex. Order does not matter.

eps - the rounding scale.

Returns:

the maximal Z value of the triangle, rounded to twice the specified scale.

triangleStr

public static String triangleStr(Mesh mesh,
                                 long id)

Produces a string representation of a triangle.

Parameters:

mesh - the mesh.

id - the if of the triangle in the mesh.

Returns:

a string representation.