org.deegree.tools.rendering.manager.buildings.generalisation
Class WorldObjectSimplifier

java.lang.Object
  org.deegree.tools.rendering.manager.buildings.generalisation.WorldObjectSimplifier

public class WorldObjectSimplifier
extends Object

This class simplifies a 3D-Object. Two different simplifications will be performed. The first one create a simplified version of the original geometry by calculating and simplifying the convex hull of its two-dimensional projection. The second one calculates a transformation matrix to move, rotated und stretch a box of size 1,1,1 located at 0,0,0 to the 3D envelope of an object.

Author:

Andreas Poth, last edited by: $Author: mschneider $

Constructor Summary

WorldObjectSimplifier()
Instantiate the simplifier..

Method Summary

void	createSimplified3DObject(org.deegree.rendering.r3d.opengl.rendering.model.geometry.WorldRenderableObject wro, int levelOfInterest, int targetQualityLevel) For this five steps will be performed.

Methods inherited from class java.lang.Object

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

Constructor Detail

WorldObjectSimplifier

public WorldObjectSimplifier()

Instantiate the simplifier..

Method Detail

createSimplified3DObject

public void createSimplified3DObject(org.deegree.rendering.r3d.opengl.rendering.model.geometry.WorldRenderableObject wro,
                                     int levelOfInterest,
                                     int targetQualityLevel)

For this five steps will be performed.

• 1. map all points to a planar horizontal surface
• 2. calculate convex hull of the points
• 3. simplify convex hull (using Douglas-Peucker algorithm)
• 4. extrude polygon represented by convex hull to height of the original geometry (first simplification result)
• 5. calculate 3D bounding box (currently not supported)

Parameters:

wro - to get the qualitylevel from.

levelOfInterest - the simplifications should be created from.

targetQualityLevel - to which the generalisation should be saved.