trans3d
3D to 2D Transformation for Perspective Plots
Projection of 3dimensional to 2dimensional points using a 4x4
viewing transformation matrix. Mainly for adding to
perspective plots such as persp
.
 Keywords
 dplot
Usage
trans3d(x, y, z, pmat)
Arguments
 x, y, z
 numeric vectors of equal length, specifying points in 3D space.
 pmat
 a $4 x 4$ viewing transformation matrix,
suitable for projecting the 3D coordinates $(x,y,z)$ into the 2D
plane using homogeneous 4D coordinates $(x,y,z,t)$;
such matrices are returned by
persp()
.
Value

a list with two components
 x,y
 the projected 2d coordinates of the 3d input
(x,y,z)
.
See Also
Examples
library(grDevices)
## See help(persp) {after attaching the 'graphics' package}
## 
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