modeling-app/docs/kcl-std/consts/std-X.md

---
title: "X"
subtitle: "Constant in std"
excerpt: "The X-axis (can be used in both 2d and 3d contexts)."
layout: manual
---

The X-axis (can be used in both 2d and 3d contexts).

```kcl
X: Axis3d
```


### Type

[`Axis3d`](/docs/kcl-std/types/std-types-Axis3d) - An abstract and infinite line in 3d space.
Move axes to std constants; move helix, revolve, and mirror2d to be declared in KCL (#6105) Move axes to std constants; move helix, revolve, and mirror2d to be declated in KCL Signed-off-by: Nick Cameron <nrc@ncameron.org> 2025-04-03 22:44:52 +13:00			`---`
Add subtitle to docs and fix primitive type links (#6724) Signed-off-by: Nick Cameron <nrc@ncameron.org> 2025-05-07 10:33:23 +12:00			`title: "X"`
More docs fixes (#6733) * Fix various docs errors around std module Signed-off-by: Nick Cameron <nrc@ncameron.org> * remove KCL from lang docs titles and move settings docs Signed-off-by: Nick Cameron <nrc@ncameron.org> * Include functions declared in Rust in module docs Signed-off-by: Nick Cameron <nrc@ncameron.org> --------- Signed-off-by: Nick Cameron <nrc@ncameron.org> 2025-05-08 08:26:56 +12:00			`subtitle: "Constant in std"`
Docs content (#6792) * Add documentation to modules, and some constants and types Signed-off-by: Nick Cameron <nrc@ncameron.org> * Improve the language reference Signed-off-by: Nick Cameron <nrc@ncameron.org> --------- Signed-off-by: Nick Cameron <nrc@ncameron.org> 2025-05-11 19:32:33 +12:00			`excerpt: "The X-axis (can be used in both 2d and 3d contexts)."`
Move axes to std constants; move helix, revolve, and mirror2d to be declared in KCL (#6105) Move axes to std constants; move helix, revolve, and mirror2d to be declated in KCL Signed-off-by: Nick Cameron <nrc@ncameron.org> 2025-04-03 22:44:52 +13:00			`layout: manual`
			`---`

Docs content (#6792) * Add documentation to modules, and some constants and types Signed-off-by: Nick Cameron <nrc@ncameron.org> * Improve the language reference Signed-off-by: Nick Cameron <nrc@ncameron.org> --------- Signed-off-by: Nick Cameron <nrc@ncameron.org> 2025-05-11 19:32:33 +12:00			`The X-axis (can be used in both 2d and 3d contexts).`
Move axes to std constants; move helix, revolve, and mirror2d to be declared in KCL (#6105) Move axes to std constants; move helix, revolve, and mirror2d to be declated in KCL Signed-off-by: Nick Cameron <nrc@ncameron.org> 2025-04-03 22:44:52 +13:00
Some improvements to the boxed signatures in the docs (#6593) * Show a more reasonable name in function docs Signed-off-by: Nick Cameron <nrc@ncameron.org> * Fix buggy docs for union types Signed-off-by: Nick Cameron <nrc@ncameron.org> * Make types in the docs signatures into links Signed-off-by: Nick Cameron <nrc@ncameron.org> --------- Signed-off-by: Nick Cameron <nrc@ncameron.org> 2025-05-01 04:03:22 +12:00			```kcl
Tag types (#7458) * Replace tag type with tagIdent and tagDecl Signed-off-by: Nick Cameron <nrc@ncameron.org> * Replace tagIdent with TaggedEdge and TaggedFace Signed-off-by: Nick Cameron <nrc@ncameron.org> --------- Signed-off-by: Nick Cameron <nrc@ncameron.org> 2025-06-16 09:10:36 +12:00			`X: Axis3d`
Move axes to std constants; move helix, revolve, and mirror2d to be declared in KCL (#6105) Move axes to std constants; move helix, revolve, and mirror2d to be declated in KCL Signed-off-by: Nick Cameron <nrc@ncameron.org> 2025-04-03 22:44:52 +13:00			```


Add subtitle to docs and fix primitive type links (#6724) Signed-off-by: Nick Cameron <nrc@ncameron.org> 2025-05-07 10:33:23 +12:00
Tag types (#7458) * Replace tag type with tagIdent and tagDecl Signed-off-by: Nick Cameron <nrc@ncameron.org> * Replace tagIdent with TaggedEdge and TaggedFace Signed-off-by: Nick Cameron <nrc@ncameron.org> --------- Signed-off-by: Nick Cameron <nrc@ncameron.org> 2025-06-16 09:10:36 +12:00			`### Type`

			[`Axis3d`](/docs/kcl-std/types/std-types-Axis3d) - An abstract and infinite line in 3d space.

Add subtitle to docs and fix primitive type links (#6724) Signed-off-by: Nick Cameron <nrc@ncameron.org> 2025-05-07 10:33:23 +12:00