MeshPointHasher

java.lang.Object
- worldBuilder.MeshPointHasher

```
public class MeshPointHasher
extends java.lang.Object
```
class generates a single unique MapPoint for each unique coordinate pair, and find the already allocated point when coordinates are repeated. I have chosen to do this with an open hash table for time efficiency.

Field Summary

Fields
Modifier and Type Field Description

int numVertices
number of (already) recorded MeshPoints

MeshPoint[] vertices
list of (already) recorded MeshPoints

Constructor Summary

Constructors
Constructor Description

MeshPointHasher(int max, double x_extent, double y_extent)
allocate a hash table and vertex list

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`MeshPoint`	`findPoint(double x, double y)`	find or create reference to MeshPoint at MapPoint(x,y)

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

- Field Detail
  - numVertices
```
public int numVertices
```
    number of (already) recorded MeshPoints
  - vertices
```
public MeshPoint[] vertices
```
    list of (already) recorded MeshPoints
- Constructor Detail
  - MeshPointHasher
```
public MeshPointHasher(int max,
                       double x_extent,
                       double y_extent)
```
    allocate a hash table and vertex list
    
    Parameters:
    
    max - ... max # of vertices
    
    x_extent - ... x diameter (in -0.5 to 0.5 map coordinates)
    
    y_extent - ... y_diameter (in -0.5 to 0.5 map coordinates)
- Method Detail
  - findPoint
```
public MeshPoint findPoint(double x,
                           double y)
```
    find or create reference to MeshPoint at MapPoint(x,y)
    
    Parameters:
    
    x - desired location (in -0.5 to 0.5 map coordinates)
    
    y - desired location (in -0.5 to 0.5 map coordinates)
    
    Returns:
    
    new (or already associated) MeshPoint We use an open hash table to note index associated w/each hash value