raja.shape
Class BasicForm

java.lang.Object
  |
  +--raja.shape.BasicForm

All Implemented Interfaces:

Form, Shape3D

Direct Known Subclasses:

Cone, Cylinder, Plane, Sphere

public abstract class BasicForm

extends Object

implements Form

Constructor Summary

BasicForm()

Method Summary

protected abstract Point3D	computeIntersection(Ray r)
protected abstract Vector3D	computeNormal(Point3D p)
boolean	contains(Point3D p)
protected abstract boolean	exactlyContains(Point3D p)
protected abstract boolean	exactlyStrictlyContains(Point3D p)
protected boolean	hasLG(Point3D p)
LocalGeometry	intersection(Ray r)
boolean	intersects(LightRay r)
protected Point3D	solve2ndOrder(double a, double b, double c, Ray r) Returns the point on the ray corresponding to the smallest positive solution to the equation a*X^2 + b*X + c = 0.
boolean	strictlyContains(Point3D p)

Methods inherited from class java.lang.Object

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

Constructor Detail

BasicForm

public BasicForm()

Method Detail

computeIntersection

protected abstract Point3D computeIntersection(Ray r)

computeNormal

protected abstract Vector3D computeNormal(Point3D p)

exactlyContains

protected abstract boolean exactlyContains(Point3D p)

exactlyStrictlyContains

protected abstract boolean exactlyStrictlyContains(Point3D p)

intersection

public LocalGeometry intersection(Ray r)

Specified by:

intersection in interface Form

intersects

public boolean intersects(LightRay r)

Specified by:

intersects in interface Shape3D

contains

public boolean contains(Point3D p)

Specified by:

contains in interface Shape3D

strictlyContains

public boolean strictlyContains(Point3D p)

Specified by:

strictlyContains in interface Shape3D

solve2ndOrder

protected Point3D solve2ndOrder(double a,
                                double b,
                                double c,
                                Ray r)

Returns the point on the ray corresponding to the smallest positive solution to the equation a*X^2 + b*X + c = 0.

Parameters:

a, - b, c the coefficients of the equation.

r - the ray.

Returns:

the point r.origin + t*r.direction where t is the smallest X > 0 such that a*X^2 + b*X + c = 0 if there is any; null otherwise.

hasLG

protected boolean hasLG(Point3D p)