R Graphical Manual

Browse All

Last data update: 2014.03.03

R: generic subdivision surface method

subdivision3d

R Documentation

generic subdivision surface method

Description

The Subdivision surface algorithm divide and refine (deform) a given mesh recursively to certain degree (depth). The mesh3d algorithm consists of two stages: divide and deform. The divide step generates for each triangle or quad four new triangles or quads, the deform step drags the points (refinement step).

Usage

  subdivision3d( x,  ...)
  ## S3 method for class 'mesh3d'
subdivision3d( x, depth = 1, normalize = FALSE, deform = TRUE, ... )
  divide.mesh3d(mesh,  vb = mesh$vb, ib = mesh$ib, it = mesh$it )
  normalize.mesh3d(mesh)
  deform.mesh3d(mesh, vb = mesh$vb, ib = mesh$ib, it = mesh$it )

Arguments

`x`	3d geometry mesh
`mesh`	3d geometry mesh
`depth`	recursion depth
`normalize`	normalize mesh3d coordinates after division if `deform` is `TRUE`
`deform`	deform mesh
`it`	indices for triangular faces
`ib`	indices for quad faces
`vb`	matrix 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 mesh3d objects.

Examples

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