threeD.raytracer.primitives
Class CSG

java.lang.Object
  threeD.raytracer.engine.AbstractSurface
      threeD.raytracer.primitives.CSG

All Implemented Interfaces:

Surface

public class CSG

extends AbstractSurface

A CSG object represents an object produced using a boolean combination of two surfaces.

Field Summary

static int	DIFFERENCE Integer code for boolean difference (A - B).
static int	INTERSECTION Integer code for boolean intersection (A & B).
static int	UNION Integer code for boolean union (A + B).

Constructor Summary

CSG(AbstractSurface a, AbstractSurface b, int type)
Constructs a new CSG object using the specified Surface objects.

Method Summary

Vector	getNormalAt(Vector point) Returns a Vector object that represents the vector normal to the 3d surface at the point represented by the specified Vector object.
boolean	intersect(Ray ray) This method calls intersectAt to determine the value to return.
Intersection	intersectAt(Ray ray) Returns an Intersection object that represents the values for t that solve the vector equation p = o + t * d where p is a point of intersection of the specified ray and the surface.
double[]	interval(double[] intersect)
double[][]	intervalDifference(double[] ia, double[] ib)
double[]	intervalIntersection(double[] ia, double[] ib)

Methods inherited from class threeD.raytracer.engine.AbstractSurface

addShader, addTexture, addTransform, calculateTransform, getColor, getColorAt, getLocation, getParent, getRotationCoefficients, getScaleCoefficients, getShadeBack, getShadeFront, getShaderSet, getSize, getTexture, getTextures, getTextureSet, getTransform, getTransform, getTransforms, removeTexture, removeTransform, setColor, setLocation, setParent, setRotationCoefficients, setScaleCoefficients, setShadeBack, setShadeFront, setShaders, setSize, setTexture, setTextures, setTransform, setTransforms, shade

Methods inherited from class java.lang.Object

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

Field Detail

UNION

public static final int UNION

Integer code for boolean union (A + B).

See Also:

Constant Field Values

DIFFERENCE

public static final int DIFFERENCE

Integer code for boolean difference (A - B).

See Also:

Constant Field Values

INTERSECTION

public static final int INTERSECTION

Integer code for boolean intersection (A & B).

See Also:

Constant Field Values

Constructor Detail

CSG

public CSG(AbstractSurface a,
           AbstractSurface b,
           int type)

Constructs a new CSG object using the specified Surface objects.

Parameters:

a - Surface A.

b - Surface B.

type - The type of boolean operation to perform (UNION, DIFFERENCE, INTERSECTION).

Throws:

java.lang.IllegalArgumentException - If the type code is not valid.

Method Detail

getNormalAt

public Vector getNormalAt(Vector point)

Description copied from interface: Surface

Returns a Vector object that represents the vector normal to the 3d surface at the point represented by the specified Vector object.

Returns:

null.

intersect

public boolean intersect(Ray ray)

This method calls intersectAt to determine the value to return.

See Also:

Surface.intersect(threeD.raytracer.engine.Ray)

intersectAt

public Intersection intersectAt(Ray ray)

Description copied from interface: Surface

Returns an Intersection object that represents the values for t that solve the vector equation p = o + t * d where p is a point of intersection of the specified ray and the surface.

See Also:

Surface.intersectAt(threeD.raytracer.engine.Ray)

interval

public double[] interval(double[] intersect)

intervalDifference

public double[][] intervalDifference(double[] ia,
                                     double[] ib)

intervalIntersection

public double[] intervalIntersection(double[] ia,
                                     double[] ib)