Generate extrusion mesh
Given a two-dimensional polygon, this generates a three-dimensional extrusion of the shape by triangulating the polygon and creating a cylinder with that shape as the end faces.
extrude3d(x, y = NULL, thickness = 1, smooth = FALSE, ...)
x, y |
A polygon description in one of the forms supported by |
thickness |
The extrusion will have this thickness. |
smooth |
logical; should normals be added so that the edges of the extrusion appear smooth? |
... |
Other parameters to pass to |
The extrusion is always constructed with the polygon in the xy plane at
z = 0 and another copy at z = thickness. Use
the transformation functions (e.g. rotate3d) to
obtain other orientations and placements.
A mesh object containing a triangulation of the polygon for each face, and quadrilaterals for the sides.
Duncan Murdoch
polygon3d for a simple polygon, triangulate for
the triangulation, turn3d for a solid of rotation.
x <- c(1:10, 10:1) y <- rev(c(rep(c(0, 2), 5), rep(c(1.5, -0.5), 5))) plot(x, y, type = "n") polygon(x, y) open3d() shade3d( extrude3d(x, y), col = "red" )
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