---
name: "gleScrew"
section: "3gle"
platform: "linux"
package: "libgle3-dev"
version: "3.1.2-1+b2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/gleScrew"
---

# gleScrew(3gle)

Draws screw-type shapes.

## NAME

gleScrew - Draws screw-type shapes.

## SYNTAX

```

```

void gleScrew (int ncp,\
                gleDouble contour\[\]\[2\],\
                gleDouble cont\_normal\[\]\[2\],\
                gleDouble up\[3\],\
 	       gleDouble startz,\
 	       gleDouble endz,\
 	       gleDouble twist);

## ARGUMENTS

- *ncp*

  number of contour points

- *contour*

  2D contour

- *cont\_normal*

  2D contour normals

- *up*

  up vector for contour

- *startx*

  start of segment

- *endz*

  end of segment

- *twist*

  number of rotations

## DESCRIPTION

Draws screw-type shapes. Takes a contour, and extrudes it along the z-axis, from a start z value of startz to an end z-value of endz. During the extrusion, it will spin the contour along the contour origin by twist degrees.

## SEE ALSO

gleExtrusion

## AUTHOR

Linas Vepstas (linas@linas.org)