OffsetCurveBuilder

com.vividsolutions.jts.operation.buffer

Class OffsetCurveBuilder

java.lang.Object
- com.vividsolutions.jts.operation.buffer.OffsetCurveBuilder

```
public class OffsetCurveBuilder
extends Object
```
Computes the raw offset curve for a single Geometry component (ring, line or point). A raw offset curve line is not noded - it may contain self-intersections (and usually will). The final buffer polygon is computed by forming a topological graph of all the noded raw curves and tracing outside contours. The points in the raw curve are rounded to a given PrecisionModel.

Constructor Summary

Constructors

Constructor and Description
`OffsetCurveBuilder(PrecisionModel precisionModel, BufferParameters bufParams)`

Method Summary

All Methods

Instance Methods

Concrete Methods
Modifier and Type	Method and Description
`BufferParameters`	`getBufferParameters()` Gets the buffer parameters being used to generate the curve.
`Coordinate[]`	`getLineCurve(Coordinate[] inputPts, double distance)` This method handles single points as well as LineStrings.
`Coordinate[]`	`getOffsetCurve(Coordinate[] inputPts, double distance)`
`Coordinate[]`	`getRingCurve(Coordinate[] inputPts, int side, double distance)` This method handles the degenerate cases of single points and lines, as well as rings.

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

- Constructor Detail
  - OffsetCurveBuilder
```
public OffsetCurveBuilder(PrecisionModel precisionModel,
                          BufferParameters bufParams)
```
- Method Detail
  - getBufferParameters
```
public BufferParameters getBufferParameters()
```
    Gets the buffer parameters being used to generate the curve.
    
    Returns:
    
    the buffer parameters being used
  - getLineCurve
```
public Coordinate[] getLineCurve(Coordinate[] inputPts,
                                 double distance)
```
    This method handles single points as well as LineStrings. LineStrings are assumed not to be closed (the function will not fail for closed lines, but will generate superfluous line caps).
    
    Parameters:
    
    inputPts - the vertices of the line to offset
    
    distance - the offset distance
    
    Returns:
    
    a Coordinate array representing the curve or null if the curve is empty
  - getRingCurve
```
public Coordinate[] getRingCurve(Coordinate[] inputPts,
                                 int side,
                                 double distance)
```
    This method handles the degenerate cases of single points and lines, as well as rings.
    
    Returns:
    
    a Coordinate array representing the curve or null if the curve is empty
  - getOffsetCurve
```
public Coordinate[] getOffsetCurve(Coordinate[] inputPts,
                                   double distance)
```