visad

Class Contour2D

java.lang.Object

visad.Contour2D

public class Contour2D
extends Object

Contour2D is a class equipped with a 2-D contouring function.

Field Summary

Fields

Modifier and Type	Field and Description
static byte	CLOCKWISE
static byte	CNTRCLOCKWISE
protected int	cols
protected Contour2D	con
static int	DIFFICULTY_THRESHOLD
static float	DIMENSION_THRESHOLD
protected int[]	num1
protected int[]	num2
protected int[]	num3
protected int[]	num4
protected int	rows
protected int	scale
protected boolean	showgrid
static byte	SIDE_BOTTOM
static byte	SIDE_LEFT
static byte	SIDE_NONE
static byte	SIDE_RIGHT
static byte	SIDE_TOP
static boolean	TRUEVALUE
static int	vertexCnt
protected float[][]	vx1
protected float[][]	vy1
protected int	whichlabels

Constructor Summary

Constructors

Constructor and Description
Contour2D()

Method Summary

Methods

Modifier and Type	Method and Description
static visad.Contour2D.ContourOutput	contour(float[] g, int nr, int nc, float[] values, float lowlimit, float highlimit, float base, boolean dash, byte[][] auxValues, boolean[] swap, boolean fill, float[][][] grd_normals, byte[][] interval_colors, double[] scale, double scale_ratio, int label_freq, double label_size, boolean labelAlign, byte[] labelColor, Object labelFont, boolean sphericalDisplayCS, Gridded3DSet spatial_set)
static void	contour(float[] g, int nr, int nc, float interval, float lowlimit, float highlimit, float base, float[][] vx1, float[][] vy1, int[] numv1, byte[][] auxValues, boolean[] swap, boolean fill, float[][][] grd_normals, byte[][] interval_colors, float[][][][] lbl_vv, byte[][][][] lbl_cc, float[][][] lbl_loc, double[] scale, double scale_ratio, int label_freq, double label_size, boolean labelAlign, byte[] labelColor, Object labelFont, boolean sphericalDisplayCS, Gridded3DSet spatial_set) Compute contour lines for a 2-D array.
static int[]	getTriOrientation(float[][] verts)
static float[]	intervalToLevels(float interval, float low, float high, float ba, boolean[] dash) Returns an array of contour values and an indication on whether to use dashed lines below the base value.

Methods inherited from class java.lang.Object

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

Field Detail

con

protected Contour2D con

whichlabels

protected int whichlabels

showgrid

protected boolean showgrid

rows

protected int rows

cols

protected int cols

scale

protected int scale

num1

protected int[] num1

num2

protected int[] num2

num3

protected int[] num3

num4

protected int[] num4

vx1

protected float[][] vx1

vy1

protected float[][] vy1

DIFFICULTY_THRESHOLD

public static final int DIFFICULTY_THRESHOLD

See Also:

Constant Field Values

DIMENSION_THRESHOLD

public static final float DIMENSION_THRESHOLD

See Also:

Constant Field Values

SIDE_LEFT

public static final byte SIDE_LEFT

See Also:

Constant Field Values

SIDE_RIGHT

public static final byte SIDE_RIGHT

See Also:

Constant Field Values

SIDE_TOP

public static final byte SIDE_TOP

See Also:

Constant Field Values

SIDE_BOTTOM

public static final byte SIDE_BOTTOM

See Also:

Constant Field Values

SIDE_NONE

public static final byte SIDE_NONE

See Also:

Constant Field Values

CLOCKWISE

public static final byte CLOCKWISE

See Also:

Constant Field Values

CNTRCLOCKWISE

public static final byte CNTRCLOCKWISE

See Also:

Constant Field Values

vertexCnt

public static int vertexCnt

TRUEVALUE

public static boolean TRUEVALUE

Constructor Detail

Contour2D

public Contour2D()

Method Detail

contour

public static void contour(float[] g,
           int nr,
           int nc,
           float interval,
           float lowlimit,
           float highlimit,
           float base,
           float[][] vx1,
           float[][] vy1,
           int[] numv1,
           byte[][] auxValues,
           boolean[] swap,
           boolean fill,
           float[][][] grd_normals,
           byte[][] interval_colors,
           float[][][][] lbl_vv,
           byte[][][][] lbl_cc,
           float[][][] lbl_loc,
           double[] scale,
           double scale_ratio,
           int label_freq,
           double label_size,
           boolean labelAlign,
           byte[] labelColor,
           Object labelFont,
           boolean sphericalDisplayCS,
           Gridded3DSet spatial_set)
                    throws VisADException

Compute contour lines for a 2-D array. If the interval is negative, then contour lines less than base will be drawn as dashed lines. The contour lines will be computed for all V such that:

 lowlimit <= V <= highlimit
 

and

 V = base + n*interval  for some integer n
 

Note that the input array, g, should be in column-major (FORTRAN) order.

Parameters:

g - the 2-D array to contour.

nr - size of 2-D array in rows

nc - size of 2-D array in columns.

interval - contour interval

lowlimit - the lower limit on values to contour.

highlimit - the upper limit on values to contour.

base - base value to start contouring at.

vx1 - array to put contour line vertices (x value)

vy1 - array to put contour line vertices (y value)

numv1 - pointer to int to return number of vertices in vx1,vy1

auxValues - colors corresponding to grid points

swap -

fill - true if filling contours

grd_normals -

interval_colors -

lbl_vv - values for label line segments

lbl_cc - label color triples

lbl_loc - center points for label locations

scale_ratio -

label_size -

labelColor -

spatial_set -

Throws:

VisADException

intervalToLevels

public static float[] intervalToLevels(float interval,
                       float low,
                       float high,
                       float ba,
                       boolean[] dash)
                                throws VisADException

Returns an array of contour values and an indication on whether to use dashed lines below the base value.

Parameters:

interval - The contouring interval. Must be non-zero. If the interval is negative, then contour lines less than the base will be drawn as dashed lines. Must not be NaN.

low - The minimum contour value. The returned array will not contain a value below this. Must not be NaN.

high - The maximum contour value. The returned array will not contain a value above this. Must not be NaN.

ba - The base contour value. The returned values will be integer multiples of the interval away from this this value. Must not be NaN. dash Whether or not contour lines less than the base should be drawn as dashed lines. This is a computed and returned value.

dash -

Returns:

Levels array

Throws:

VisADException - The contour interval is zero or too small.

contour

public static visad.Contour2D.ContourOutput contour(float[] g,
                                    int nr,
                                    int nc,
                                    float[] values,
                                    float lowlimit,
                                    float highlimit,
                                    float base,
                                    boolean dash,
                                    byte[][] auxValues,
                                    boolean[] swap,
                                    boolean fill,
                                    float[][][] grd_normals,
                                    byte[][] interval_colors,
                                    double[] scale,
                                    double scale_ratio,
                                    int label_freq,
                                    double label_size,
                                    boolean labelAlign,
                                    byte[] labelColor,
                                    Object labelFont,
                                    boolean sphericalDisplayCS,
                                    Gridded3DSet spatial_set)
                                             throws VisADException

Throws:

VisADException

getTriOrientation

public static int[] getTriOrientation(float[][] verts)