toxi.geom.mesh.subdiv
Class MidpointDisplacementSubdivision

java.lang.Object
  toxi.geom.mesh.subdiv.SubdivisionStrategy
      toxi.geom.mesh.subdiv.DisplacementSubdivision
          toxi.geom.mesh.subdiv.MidpointDisplacementSubdivision

public class MidpointDisplacementSubdivision
extends DisplacementSubdivision

This subdivision strategy splits an edge in two equal halves at its mid point. The midpoint itself is being displaced, however, in the direction of the vector going from the configured reference point (often the mesh centroid is used) towards the edge midpoint. The displacement amount is configurable as fraction of the original edge length. So given that:

 M = edge midpoint
 R = reference point
 l = edge length
 a = displacement amplification factor
 
 D  = normalized(M-R)
 M' = M + D * a * l
 

Field Summary

Vec3D

centroid

Fields inherited from class toxi.geom.mesh.subdiv.SubdivisionStrategy

DEFAULT_ORDERING

Constructor Summary

MidpointDisplacementSubdivision(Vec3D centroid, float amount)

Method Summary

java.util.List<Vec3D>

computeSplitPoints(WingedEdge edge) Computes a number of points on (or near) the given edge which are used for splitting the edge in smaller segments.

Methods inherited from class toxi.geom.mesh.subdiv.DisplacementSubdivision

getAmp, invertAmp, scaleAmp, setAmp

Methods inherited from class toxi.geom.mesh.subdiv.SubdivisionStrategy

getEdgeOrdering, setEdgeOrdering

Methods inherited from class java.lang.Object

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

Field Detail

centroid

public Vec3D centroid

Constructor Detail

MidpointDisplacementSubdivision

public MidpointDisplacementSubdivision(Vec3D centroid,
                                       float amount)

Method Detail

computeSplitPoints

public java.util.List<Vec3D> computeSplitPoints(WingedEdge edge)

Description copied from class: SubdivisionStrategy

Computes a number of points on (or near) the given edge which are used for splitting the edge in smaller segments.

Specified by:

computeSplitPoints in class SubdivisionStrategy

Parameters:

edge - edge to split

Returns:

list of split points