subdivision3d: generic subdivision surface method

In trestletech/rgl: 3D visualization device system (OpenGL)

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.

See Also

r3d mesh3d

Examples

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

trestletech/rgl documentation built on May 31, 2019, 7:49 p.m.