trans3d
3D to 2D Transformation for Perspective Plots
Projection of 3-dimensional to 2-dimensional 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 \(4 \times 4\) 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
the projected 2d coordinates of the 3d input (x,y,z).
See Also
Examples
library(grDevices)
<!-- %% it would be nice to have an independent example -->
## See help(persp) {after attaching the 'graphics' package}
## -----------
Community examples
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