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grDevices (version 3.4.0)

trans3d: 3D to 2D Transformation for Perspective Plots

Description

Projection of 3-dimensional to 2-dimensional points using a 4x4 viewing transformation matrix. Mainly for adding to perspective plots such as persp.

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
x,y
the projected 2d coordinates of the 3d input (x,y,z).

See Also

persp

Examples

Run this code
<!-- %% it would be nice to have an independent example -->
## See  help(persp) {after attaching the 'graphics' package}
##      -----------

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