com.brackeen.javagamebook.graphics3D
Class SortedScanConverter

java.lang.Object
  com.brackeen.javagamebook.graphics3D.ScanConverter
      com.brackeen.javagamebook.graphics3D.SortedScanConverter

public class SortedScanConverter

extends ScanConverter

A ScanConverter used to draw sorted polygons from front-to-back with no overdraw. Polygons are added and clipped to a list of what's in the view window. Call clear() before drawing every frame.

Nested Class Summary

Nested classes inherited from class com.brackeen.javagamebook.graphics3D.ScanConverter

ScanConverter.Scan

Constructor Summary

SortedScanConverter(ViewWindow view)
Creates a new SortedScanConverter for the specified ViewWindow.

Method Summary

void	clear() Clears the current view scan.
boolean	convert(Polygon3D polygon) Scan-converts a polygon, and if sortedMode is on, adds and clips it to a list of what's in the view window.
int	getNumScans(int y) Gets the number of scans for the specified row.
ScanConverter.Scan	getScan(int y, int index) Gets the nth scan for the specified row.
boolean	isFilled() Checks if the view is filled.
void	setSortedMode(boolean b) Sets sorted mode, so this scan converter can assume the polygons are drawn front-to-back, and should be clipped against polygons already scanned for this view.

Methods inherited from class com.brackeen.javagamebook.graphics3D.ScanConverter

getBottomBoundary, getScan, getTopBoundary

Methods inherited from class java.lang.Object

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

Constructor Detail

SortedScanConverter

public SortedScanConverter(ViewWindow view)

Creates a new SortedScanConverter for the specified ViewWindow. The ViewWindow's properties can change in between scan conversions. By default, sorted mode is off, but can be turned on by calling setSortedMode().

Method Detail

clear

public void clear()

Clears the current view scan. Call this method every frame.

setSortedMode

public void setSortedMode(boolean b)

Sets sorted mode, so this scan converter can assume the polygons are drawn front-to-back, and should be clipped against polygons already scanned for this view.

getScan

public ScanConverter.Scan getScan(int y,
                                  int index)

Gets the nth scan for the specified row.

getNumScans

public int getNumScans(int y)

Gets the number of scans for the specified row.

isFilled

public boolean isFilled()

Checks if the view is filled.

convert

public boolean convert(Polygon3D polygon)

Scan-converts a polygon, and if sortedMode is on, adds and clips it to a list of what's in the view window.

Overrides:

convert in class ScanConverter