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images
images
 
 
pt_BR
pt_BR
 
 
ru
ru
 
 
Background.md
Background.md
 
 
Copy.md
Copy.md
 
 
README.md
README.md
 
 
Room.md
Room.md
 
 
actions.md
actions.md
 
 
bitmap-fonts.md
bitmap-fonts.md
 
 
catmoddocs.md
catmoddocs.md
 
 
ct-concepts.md
ct-concepts.md
 
 
ct.backgrounds.md
ct.backgrounds.md
 
 
ct.camera.md
ct.camera.md
 
 
ct.emitters.md
ct.emitters.md
 
 
ct.inputs.md
ct.inputs.md
 
 
ct.md
ct.md
 
 
ct.res.md
ct.res.md
 
 
ct.rooms.md
ct.rooms.md
 
 
ct.sound.md
ct.sound.md
 
 
ct.styles.md
ct.styles.md
 
 
ct.tilemaps.md
ct.tilemaps.md
 
 
ct.timer.md
ct.timer.md
 
 
ct.types.md
ct.types.md
 
 
ct.u.md
ct.u.md
 
 
event-order.md
event-order.md
 
 
game-and-ui-coordinates.md
game-and-ui-coordinates.md
 
 
game-pause.md
game-pause.md
 
 
jsintro_pt1.md
jsintro_pt1.md
 
 
jsintro_pt2.md
jsintro_pt2.md
 
 
localstorage.md
localstorage.md
 
 
migration-0to1.md
migration-0to1.md
 
 
migration-1-2to1-3.md
migration-1-2to1-3.md
 
 
modding-events-and-injections.md
modding-events-and-injections.md
 
 
modding-fields-declaration.md
modding-fields-declaration.md
 
 
modding-input-methods.md
modding-input-methods.md
 
 
modding-settings-and-extensions.md
modding-settings-and-extensions.md
 
 
modding-structure.md
modding-structure.md
 
 
modding-typings-and-intellisense.md
modding-typings-and-intellisense.md
 
 
movement.md
movement.md
 
 
skeletal-animation.md
skeletal-animation.md
 
 
textures-magic-properties.md
textures-magic-properties.md
 
 
troubleshooting-leaking-pixels.md
troubleshooting-leaking-pixels.md
 
 
troubleshooting-sounds-not-playing.md
troubleshooting-sounds-not-playing.md
 
 
troubleshooting-teared-background.md
troubleshooting-teared-background.md
 
 
tut-making-jettycat.md
tut-making-jettycat.md
 
 
tut-making-platformer.md
tut-making-platformer.md
 
 
tut-making-shooter.md
tut-making-shooter.md
 
 
tut-polishing-jettycat.md
tut-polishing-jettycat.md
 
 
viewport-management.md
viewport-management.md
 
 

README.md

home heroText tagline actionText actionLink footer
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Welcome to the official ct.js docs!
Learn ct.js, complete tutorials, and contribute to ct.js documentation
Read the docs →
/ct-concepts.html
Ct.js documentation. Except where otherwise noted, content is licensed under a Creative Commons Attribution 4.0 International License.

Learn JavaScript

Games made in ct.js use JavaScript, or simply JS, to code its gameplay logic. Learn the needed part of it in our little Introduction to JS.

Learn JavaScript →

Complete tutorials

The best way to learn is by making, and you can create real games with our step-by-step tutorials:

Learn the core library

See additional methods and properties of copies, camera, rooms, and procedurally create tilemaps, backgrounds, and new copies.

Go to ct.js docs →

Notable additions in ct.js v1.5

  • ct.backgrounds and ct.tilemaps — two new built-in APIs appeared for your needs in procedural generation.
  • ct.place got a bunch of tracing functions that you can use to test for collisions in an arbitrary area. See them in a new doc page at ct.js.
  • ct.tween module got three new interpolation methods thanks to kkornushin: elastic, bouncing motion, and motion with backwards overshoot. See ct.tween's docs at your ct.js editor.
  • You can now mark a room as a UI layer in room's properties instead of using isUi property!
  • New methods: ct.types.isCopy, ct.u.hexToPixi, ct.u.pixiToHex.
Changelog →

Get the cheatsheet

Download the cheatsheet →

Join the community

Join our Discord server to meet other game developers, receive help, aid others, and share your creations. Alternatively, you can also post on our forum.

Discord Server → Forum →

Contribute

Set up a dev environment to run a local docs server and use simple Markdown syntax to write new tutorials and send fixes.

Visit the repo →