Triangle Mesh Functions
Functions to create and modify triangle mesh objects representing 3D surfaces..
makeTriangles(v1, v2, v3, color = "red", color2 = NA, alpha = 1,
fill = TRUE, col.mesh = if (fill) NA else color,
smooth = 0, material = "default")
updateTriangles(triangles, color, color2, alpha, fill, col.mesh,
material, smooth)
translateTriangles(triangles, x = 0, y = 0, z = 0)
scaleTriangles(triangles, x = 1, y = x, z = x)
transformTriangles(triangles, R)v1,v2,v3 |
specification of triangle coordinates. If all three
are provided then they should be matrices with three columns
representing coordinates of the first, second, and third vertices of
the triangles. If only |
triangles |
triangle mesh object. |
x,y,z |
numeric of length one. Amounts by which to translate or scale corresponding coordinates. |
color |
color to use for the surface. Can also be a function of three arguments. This is called with three arguments, the coordinates of the midpoints of the triangles making up the surface. The function should return a vector of colors to use for the triangles. |
color2 |
opposite face color. |
alpha |
alpha channel level, a number between 0 and 1. |
fill |
logical; if |
col.mesh |
color to use for the wire frame. |
smooth |
integer or logical specifying Phong shading level for "standard" and "grid" engines or whether or not to use shading for the "rgl" engine. |
material |
material specification; currently only used by "standard" and "grid" engines. Currently possible values are the character strings "dull", "shiny", "metal", and "default". |
R |
4 by 4 homogeneous coordinate transformation matrix to apply. |
makeTriangles creates a triangle mesh object.
updateTriangles modifies fields of such an object. Both may
perform some consistency checks.
translateTriangles and scaleTriangles translate or scale
the vertex locations of triangle mesh objects by specified amounts.
transformTriangles applies a transformation specified by a 4 by
4 homogeneous transformation matrix.
A triangle mesh object of class Triangles3D.
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