gov.nist.microanalysis.NISTMonte
Class SimpleBlock

java.lang.Object
  gov.nist.microanalysis.NISTMonte.SimpleBlock

All Implemented Interfaces:

MonteCarloSS.Shape, TrajectoryVRML.IRender

public class SimpleBlock
extends java.lang.Object
implements MonteCarloSS.Shape, TrajectoryVRML.IRender

Implements the MonteCarloSS.Shape interface for a simple block shaped region. The edges of the block are aligned with the coordinate axes. The extent of the block is defined by two corners.

Copyright: Pursuant to title 17 Section 105 of the United States Code this software is not subject to copyright protection and is in the public domain

Company: National Institute of Standards and Technology

Version:

1.0

Author:

Nicholas W. M. Ritchie

Constructor Summary

SimpleBlock(double[] corner0, double[] corner1)
SimpleBlock - Constructs a SimpleBlock, simple shape definition class that implements the Shape interface.

Method Summary

boolean	contains(double[] pos) contains - Is the specified point inside the item represented by this Shape interface? A point on the interface between two Shapes is considered to be inside both Shapes.
double	getFirstIntersection(double[] pos0, double[] pos1) getFirstIntersection - Consider a ray starting at pos0 towards pos1.
void	render(TrajectoryVRML.RenderContext rc, java.io.Writer wr) render - Renders a SimpleBlock as VRML

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleBlock

public SimpleBlock(double[] corner0,
                   double[] corner1)

SimpleBlock - Constructs a SimpleBlock, simple shape definition class that implements the Shape interface.

Parameters:

corner0 - double[] - The x,y & z coordinates of one corner

corner1 - double[] - The coordinates of the diagonal corner

Method Detail

contains

public boolean contains(double[] pos)

Description copied from interface: MonteCarloSS.Shape

contains - Is the specified point inside the item represented by this Shape interface? A point on the interface between two Shapes is considered to be inside both Shapes.

Specified by:

contains in interface MonteCarloSS.Shape

Parameters:

pos - double[] - a three item array

Returns:

boolean

getFirstIntersection

public double getFirstIntersection(double[] pos0,
                                   double[] pos1)

Description copied from interface: MonteCarloSS.Shape

getFirstIntersection - Consider a ray starting at pos0 towards pos1. If the ray does not intersect this shape return Double.MAX_VALUE. If the ray does intersect the Shape, return the u such that p(u)=pos0+u*(pos1-pos0) is the point at which the intersection occurs. If u is greater or equal to 0 but less than or equal to 1, the intersection occurs on the interval [pos0,pos1]. This indicates that a full step from pos0 to pos1 will not remain entirely inside Shape. In fact, the longest possible step is between pos0 and p(u). Intersections before pos0 (ie u<0.0) are not relevant and should be ignored. You may optimize getFirstIntersection in the case that u is greater than 1.0. Since the distance between pos0 and pos1 represents a single step and u=1.0 represents taking the full step, you may return a number greater than 1.0 but less than the real u when the real u is greater than one and it would require additional computation to discover the actual value of u.

Specified by:

getFirstIntersection in interface MonteCarloSS.Shape

Parameters:

pos0 - double[] - three element array

pos1 - double[] - three element array

Returns:

double - The fraction of the length from pos0 to pos1 at which the first intersection occurs. Otherwise Double.MAX_VALUE.

render

public void render(TrajectoryVRML.RenderContext rc,
                   java.io.Writer wr)
            throws java.io.IOException

render - Renders a SimpleBlock as VRML

Specified by:

render in interface TrajectoryVRML.IRender

Parameters:

rc -

wr -

Throws:

java.io.IOException - (non-Javadoc)

See Also:

TrajectoryVRML.IRender.render(gov.nist.microanalysis.NISTMonte.TrajectoryVRML.RenderContext, java.io.Writer)