astex
Class Geometry

java.lang.Object
  astex.Geometry

public class Geometry
extends java.lang.Object

Various involved geometrical operations for the renderer. The ray cylinder intersection is adapted from WildMagics software renderer http://www.geometrictools.com/ Which is available under LGPL license

Constructor Summary

Geometry()

Method Summary

static double	cross(double[] a, double[] b, double[] c) Form cross product of two vectors(a = b x c).
static double	dot(double[] a, double[] b) Generate the dot product.
static void	generateOrthonormalBasis(double[] rkU, double[] rkV, double[] rkW, boolean bUnitLengthW) Generate orthogonal normalised vector set.
static double	normalise(double[] p) Normalise the vector.
static int	rayCapsuleInt(double[] ray0, double[] ray1, double[] pint, double[] nint, boolean top) Peform ray-cylinder intersection and normal generation.
static void	rayCapsuleIntInit(double[] c0, double[] c1, double cr, double zrange) Initialise cylinder calculations.
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Methods inherited from class java.lang.Object

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

Constructor Detail

Geometry

public Geometry()

Method Detail

rayCapsuleIntInit

public static void rayCapsuleIntInit(double[] c0,
                                     double[] c1,
                                     double cr,
                                     double zrange)

Initialise cylinder calculations.

raySphereInt

public static int raySphereInt(double[] ray0,
                               double[] ray1,
                               double x,
                               double y,
                               double z,
                               double r,
                               double[] pint,
                               double[] nint,
                               boolean top)

Peform ray-sphere intersection and normal generation.

rayCapsuleInt

public static int rayCapsuleInt(double[] ray0,
                                double[] ray1,
                                double[] pint,
                                double[] nint,
                                boolean top)

Peform ray-cylinder intersection and normal generation.

normalise

public static double normalise(double[] p)

Normalise the vector.

generateOrthonormalBasis

public static void generateOrthonormalBasis(double[] rkU,
                                            double[] rkV,
                                            double[] rkW,
                                            boolean bUnitLengthW)

Generate orthogonal normalised vector set.

cross

public static double cross(double[] a,
                           double[] b,
                           double[] c)

Form cross product of two vectors(a = b x c).

dot

public static double dot(double[] a,
                         double[] b)

Generate the dot product.