rgl (version 0.83-3)

subdivision3d: generic subdivision surface method

Description

The Subdivision surface algorithm divide and refine (deform) a given mesh recursively to certain degree (depth). The qmesh3d algorithm consists of two stages: divide and deform. The divide step generates for each quad four new quads, the deform step drags the points (refinement step).

Usage

subdivision3d( x,  ...)
  ## S3 method for class 'qmesh3d':
subdivision3d( x, depth=1, normalize=FALSE, deform=TRUE, ... )
  divide.qmesh3d(mesh,  vb=mesh$vb, ib=mesh$ib )
  normalize.qmesh3d(mesh)
  deform.qmesh3d(mesh,vb=mesh$vb,ib=mesh$ib)

Arguments

x

3d geometry mesh

mesh

3d geometry mesh

depth

recursion depth

normalize

normalize qmesh3d coordinates after division if deform is TRUE otherwise

deform

deform mesh after normalization

ib

vector of indices (i.e., which sets of vertices to combine into quads); 4xn matrix or equivalent vector

vb

vector of vertices: 4xn matrix (rows x,y,z,h) or equivalent vector, where h indicates scaling of each plotted quad

...

other arguments (unused)

Details

Generic subdivision surface method. Currently there exists an algorithm that can be applied on qmesh3d objects.

See Also

r3d qmesh3d

Examples

open3d()
  shade3d( subdivision3d( cube3d(), depth=3 ), color="red", alpha=0.5 )