trans3d {grDevices} R Documentation

## 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).

persp