---
name: "cad2d"
section: "1"
platform: "linux"
package: "qepcad"
version: "1.74+ds-5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/cad2d"
---

# cad2d(1)

A Program for producing CADs of R^2 Decomposition

## NAME

CAD2D - A Program for producing CADs of R^2 Decomposition

## SYNOPSIS

**cad2d \[-h\|-v\] \[-noecho\] \[-t** *\<num\>* **\] \[+N** *\<numcells\>* **\]**

## DESCRIPTION

The CAD2D program is a minor modification of QEPCAD for quantifier-free formulas in 2 variables. It is able to do some lifting steps completely with validated floating-point arithmetic, which can lead to much reduced overall time for 2-dimensional CAD computation. Particularly, if you're interested in plotting a 2-dimensional CAD, this is a better choice than QEPCAD.

## OPTIONS

- \-h

  Help information

- \-v

  Print version string

- \-noecho

  Turns off echoing of input

- \-t \<num\>

  Sets a timeout of *\<num\>* seconds.

- \+N\<numcells\>

  Sets garbage collected space to *\<numcells\>.* Default is 2000000.  Maximum allowable is 1073741822 (Because "Word" is 32 bits).

- \+h

  Prints Saclib help message.

## AUTHORS

The principal author of the original QEPCAD is Hoon Hong. Other contributors include:

- •

  Christopher W. Brown

- •

  George E. Collins

- •

  Mark J. Encarnacion

- •

  Jeremy R, Johnson

- •

  Werner Krandick

- •

  Scott McCallum

- •

  Stanly Steinberg

- •

  Richard Liska

- •

  Nicolas Robidoux

  The author of Version B is Christopher W. Brown \<wcbrown@usna.edu\>.

  This manual page was written by Doug Torrance \<dtorrance@piedmont.edu\> for the Debian GNU/Linux system (but may be used by others).

## SEE ALSO

[**qepcad**(1)](/qepcad/1.md)