endrov.windowLineage
Class HierarchicalPainter

java.lang.Object
  endrov.windowLineage.HierarchicalPainter

public class HierarchicalPainter
extends java.lang.Object

Hierarchical 2D rendering system. When drawing really large charts that do not fit within the screen, the most important optimization is culling of objects that are outside the screen. This class does it by storing objects in a tree such that a sub-object is within the bounding box of the parent. This logarithmically reduces the number of objects that has to be considered for rendering.

Nested Class Summary

static class	HierarchicalPainter.BoundingBox Bounding box around something to draw
static class	HierarchicalPainter.Camera Location of camera and current zoom
static class	HierarchicalPainter.DrawNode One drawable node in the hierarchical tree
static class	HierarchicalPainter.DrawNodeContainer Node that doesn't draw anything

Field Summary

java.util.List<HierarchicalPainter.DrawNode>

topNodes

Constructor Summary

HierarchicalPainter()

Method Summary

HierarchicalPainter.BoundingBox	getTotalBoundingBox() Get a bounding box around all objects, or null if there are no objects
int	paint_(java.awt.Graphics g, double width, double height, HierarchicalPainter.Camera cam, HierarchicalPainter.BoundingBox screenBB, HierarchicalPainter.DrawNode n)
void	paint(java.awt.Graphics g, double width, double height, HierarchicalPainter.Camera cam) Paint everything

Methods inherited from class java.lang.Object

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

Field Detail

topNodes

public java.util.List<HierarchicalPainter.DrawNode> topNodes

Constructor Detail

HierarchicalPainter

public HierarchicalPainter()

Method Detail

getTotalBoundingBox

public HierarchicalPainter.BoundingBox getTotalBoundingBox()

Get a bounding box around all objects, or null if there are no objects

paint

public void paint(java.awt.Graphics g,
                  double width,
                  double height,
                  HierarchicalPainter.Camera cam)

Paint everything

Parameters:

width - Width of output g

height - Height of output g

cam - Camera

paint_

public int paint_(java.awt.Graphics g,
                  double width,
                  double height,
                  HierarchicalPainter.Camera cam,
                  HierarchicalPainter.BoundingBox screenBB,
                  HierarchicalPainter.DrawNode n)