Class Plane

java.lang.Object
  |
  +--Object
        |
        +--Plane

public class Plane

extends Object

Plane represents an infinite plane object

Field Summary

double	Constant Holds the constant of the plane equation
Vector	Normal Holds the normal that defines this plane

Fields inherited from class Object

SurfaceMaterial

Constructor Summary

Plane()
Create a default plane

Plane(Material n, Vector v, double c)
Create a plane with the given material and plane equation Note values are referenced not copied in the new object

Method Summary

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

Methods inherited from class java.lang.Object

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

Field Detail

Normal

public Vector Normal

Holds the normal that defines this plane

Constant

public double Constant

Holds the constant of the plane equation

Constructor Detail

Plane

public Plane()

Create a default plane

Plane

public Plane(Material n,
             Vector v,
             double c)

Create a plane with the given material and plane equation Note values are referenced not copied in the new object

Parameters:

n - the material for the plane

v - the vector that plane is normal to

c - the constant of the plane equation

Method Detail

normal

public Vector normal(Point p)

Find the normal of an object at the given point on its surface. Note that for planes the normal is constant and a reference to the internal vector is returned.

Parameters:

pt - the surface point to find the normal at

Returns:

a reference to the fixed normal of the plane

Overrides:

normal in class Object

intersect

public double intersect(Ray ray)

Find the intersection of the plane 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.

Overrides:

intersect in class Object

read

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

Read the plane 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

Overrides:

read in class Object

write

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

Write the plane to the given destination

Parameters:

os - the destination to write to

Throws:

java.io.IOException - if the write fails.

Overrides:

write in class Object

print

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

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

Parameters:

os - the destination to write to

Throws:

java.io.IOException - if the write fails.

Overrides:

print in class Object