Class Object

java.lang.Object
  |
  +--Object

Direct Known Subclasses:

Plane, Sphere

public abstract class Object

extends java.lang.Object

Object superclass Each type of object must extend and implement this class.

Field Summary

Material

SurfaceMaterial Holds the material of this object

Constructor Summary

Object()

Method Summary

abstract double	intersect(Ray ray) Find the intersection of an object and a given ray.
abstract Vector	normal(Point pt) Find the normal of an object at the given point on its surface.
abstract void	print(SceneWriter os) Print a human readable version of the object definition to the given destination
abstract void	read(SceneReader is) Read the object from the given source
abstract void	write(SceneWriter os) Write the object to the given destination

Methods inherited from class java.lang.Object

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

Field Detail

SurfaceMaterial

public Material SurfaceMaterial

Holds the material of this object

Constructor Detail

Object

public Object()

Method Detail

intersect

public abstract double intersect(Ray ray)

Find the intersection of an object and a given ray. The return value is positive is the intersection is found and this value gives the distance along the ray. Negative values imply that the intersection was either not successful or the intersection point was before the origin. This value can be used with the pointAt method of the Ray class (@see Ray#pointAt)

Parameters:

ray - the ray to intersect with

Returns:

a double value that gives the distance along the ray.

normal

public abstract Vector normal(Point pt)

Find the normal of an object at the given point on its surface.

Parameters:

pt - the surface point to find the normal at

Returns:

a vector that contains the required normal

read

public abstract void read(SceneReader is)
                   throws java.io.IOException,
                          java.lang.NumberFormatException

Read the object from the given source

Parameters:

is - the source to read from

Throws:

java.io.IOException - if the light can not be read

java.io.NumberFormatException - if there a number format error is encountered

write

public abstract void write(SceneWriter os)
                    throws java.io.IOException

Write the object to the given destination

Parameters:

os - the destination to write to

Throws:

java.io.IOException - if the write fails.

print

public abstract void print(SceneWriter os)
                    throws java.io.IOException

Print a human readable version of the object definition to the given destination

Parameters:

os - the destination to write to

Throws:

java.io.IOException - if the write fails.