Line

java.lang.Object
- de.grogra.vecmath.geom.Line

```
public class Line
extends java.lang.Object
```
This class represents the geometry of a line.

Author:

Ole Kniemeyer

Field Summary

Fields
Modifier and Type	Field and Description
`Vector3d`	`direction` Specifies the direction of the line.
`float`	`directionDensity` The probability density of direction for this ray.
`double`	`end` The line ends at `origin + end * direction`.
`Tuple3d`	`origin` Origin of the line.
`float`	`originDensity` The probability density of origin for this ray.
`boolean`	`reflected`
`Color3f`	`spectrum` The spectrum of the ray.
`double`	`start` The line starts at `origin + start * direction`.
`boolean`	`valid`
`float`	`x`
`float`	`y`

Constructor Summary

Constructors
Constructor and Description

Line()

Line(Tuple3d origin, Vector3d direction, double start, double end)

Constructors
Constructor and Description
`Line()`
`Line(Tuple3d origin, Vector3d direction, double start, double end)`

Method Summary

Methods
Modifier and Type	Method and Description
`Line`	`deepCopy()`
`double`	`distance(Tuple3d point)` Computes the distance between `point` and this line.
`double`	`distanceSquared(Tuple3d point)` Computes the square of the distance between `point` and this line.
`double`	`length()` Returns the length of this line.
`double`	`lengthSquared()` Returns the square of the length of this line.
`void`	`setLineAttributes(double start, double end)`
`java.lang.String`	`toString()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - direction
```
public Vector3d direction
```
    Specifies the direction of the line. This vector is not necessarily normalized.
  - directionDensity
```
public float directionDensity
```
    The probability density of direction for this ray. This field is set by Shader.generateRandomRays and Light.generateRandomRays. If p_ω⁺ is the probability density that has been used for generating the random ray direction (measured with respect to projected solid angle ω⁺, i.e., dω⁺ = cos θ dω), then this field is set to p_ω⁺(direction). It is not defined for rays emanating from a directional light source. It may be Float.POSITIVE_INFINITY as a result of Shader.generateRandomRays, namely for ideal specular reflection or transmission.
  - end
```
public double end
```
    The line ends at origin + end * direction. The condition start <= end has to be satisfied.
  - origin
```
public Tuple3d origin
```
    Origin of the line.
  - originDensity
```
public float originDensity
```
    The probability density of origin for this ray. This field is set by Light.generateRandomRays. If p_x is the probability density that has been used for generating the random ray origin, then this field is set to p_x(origin). It is not defined for rays emanating from a point light source.
  - reflected
```
public boolean reflected
```
  - spectrum
```
public Color3f spectrum
```
    The spectrum of the ray. Depending on context, this may represent the ray's spectral radiant power or other properties.
  - start
```
public double start
```
    The line starts at origin + start * direction.
  - valid
```
public boolean valid
```
  - x
```
public float x
```
  - y
```
public float y
```
- Constructor Detail
  - Line
```
public Line()
```
  - Line
```
public Line(Tuple3d origin,
    Vector3d direction,
    double start,
    double end)
```
- Method Detail
  - deepCopy
```
public Line deepCopy()
```
  - distance
```
public double distance(Tuple3d point)
```
    Computes the distance between point and this line. The distance is defined to be the distance between point and the closest point of this line.
    
    Parameters:
    point - a point
    
    Returns:
    distance to point
  - distanceSquared
```
public double distanceSquared(Tuple3d point)
```
    Computes the square of the distance between point and this line. The distance is defined to be the distance between point and the closest point of this line.
    
    Parameters:
    point - a point
    
    Returns:
    squared distance to point
  - length
```
public double length()
```
    Returns the length of this line.
    
    Returns:
    length of this line
  - lengthSquared
```
public double lengthSquared()
```
    Returns the square of the length of this line.
    
    Returns:
    squared length of this line
  - setLineAttributes
```
public void setLineAttributes(double start,
                     double end)
```
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object

Class Line

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

direction

directionDensity

end

origin

originDensity

reflected

spectrum

start

valid

x

y

Constructor Detail

Line

Line

Method Detail

deepCopy

distance

distanceSquared

length

lengthSquared

setLineAttributes

toString