bascenev1lib package

Library of stuff using the bascenev1 api: games, actors, etc.

Subpackages

• bascenev1lib.activity package
• bascenev1lib.actor package
• bascenev1lib.game package
• bascenev1lib.mapdata package
• bascenev1lib.session package

Submodules

bascenev1lib.characterviewer module

A viewer showing a character standing around.

bascenev1lib.characterviewer.STAND_HEIGHT = -0.58

Where to stand a spaz for it to start out at rest on our floor.

bascenev1lib.gameutils module

Various utilities useful for gameplay.

class bascenev1lib.gameutils.SharedObjects

Bases: object

Various common components for use in games.

Objects contained here are created on-demand as accessed and shared by everything in the current activity. This includes things such as standard materials.

property attack_material: Material

A bascenev1.Material applied to explosion shapes, punch shapes, etc. An object not wanting to receive impulse/etc messages can disable collisions against this material.

property death_material: Material

A bascenev1.Material that sends a ba.DieMessage() to anything that touches it; handy for terrain below a cliff, etc.

property footing_material: Material

Anything that can be ‘walked on’ should have this bascenev1.Material applied; generally just terrain and whatnot. A character will snap upright whenever touching something with this material so it should not be applied to props, etc.

classmethod get() → SharedObjects

Fetch/create the instance of this class for the current activity.

property object_material: Material

A bascenev1.Material that should be applied to any small, normal, physical objects such as bombs, boxes, players, etc. Other materials often check for the presence of this material as a prerequisite for performing certain actions (such as disabling collisions between initially-overlapping objects)

property pickup_material: Material

A bascenev1.Material; collision shapes used for picking things up will have this material applied. To prevent an object from being picked up, you can add a material that disables collisions against things containing this material.

property player_material: Material

a bascenev1.Material to be applied to player parts. Generally, materials related to the process of scoring when reaching a goal, etc will look for the presence of this material on things that hit them.

property railing_material: Material

A bascenev1.Material with a very low friction/stiffness/etc that can be applied to invisible ‘railings’ useful for gently keeping characters from falling off of cliffs.

property region_material: Material

A bascenev1.Material used for non-physical collision shapes (regions); collisions can generally be allowed with this material even when initially overlapping since it is not physical.

bascenev1lib.mainmenu module

Session and Activity for displaying the main menu bg.

class bascenev1lib.mainmenu.MainMenuActivity(settings: dict)

Bases: Activity[Player, Team]

Activity showing the rotating main menu bg stuff.

on_transition_in() → None

Called when the activity is first becoming visible.

Upon this call, the activity should fade in backgrounds, start playing music, etc. It does not yet have access to players or teams, however. They remain owned by the previous activity up until on_begin() is called.

class bascenev1lib.mainmenu.MainMenuSession

Bases: Session

Session that runs the main menu environment.

on_activity_end(activity: Activity, results: Any) → None

Called when the current activity has ended.

The session should look at the results and start another activity.

on_player_request(player: SessionPlayer) → bool

Called when a new player wants to join the session.

This should return True or False to accept/reject.

bascenev1lib.maps module

Standard maps.

class bascenev1lib.maps.BigG

Bases: Map

Large G shaped map for racing

defs = <module 'bascenev1lib.mapdata.big_g' from '/home/runner/work/ballistica/ballistica/.cache/sphinxfiltered/ba_data/bascenev1lib/mapdata/big_g.py'>

classmethod get_play_types() → list[str]

Return valid play types for this map.

classmethod get_preview_texture_spec() → TextureSpec

Return this map’s preview texture as an asset-package spec.

This is the hook maps should override – typically returning a texture straight off an asset-package wrapper (someassets.textures.my_map_preview). Unlike a loaded texture, a spec can go anywhere a texture is described rather than drawn directly, such as doc-ui pages (the playlist browser shows previews this way). get_preview_texture() loads it.

name = 'Big G'

classmethod on_preload() → Any

Called when the map is being preloaded.

It should return any media/data it requires to operate

class bascenev1lib.maps.Bridgit

Bases: Map

Map with a narrow bridge in the middle.

dataname = 'bridgit'

defs = <module 'bascenev1lib.mapdata.bridgit' from '/home/runner/work/ballistica/ballistica/.cache/sphinxfiltered/ba_data/bascenev1lib/mapdata/bridgit.py'>

classmethod get_play_types() → list[str]

Return valid play types for this map.

classmethod get_preview_texture_spec() → TextureSpec

Return this map’s preview texture as an asset-package spec.

This is the hook maps should override – typically returning a texture straight off an asset-package wrapper (someassets.textures.my_map_preview). Unlike a loaded texture, a spec can go anywhere a texture is described rather than drawn directly, such as doc-ui pages (the playlist browser shows previews this way). get_preview_texture() loads it.

name = 'Bridgit'

classmethod on_preload() → Any

Called when the map is being preloaded.

It should return any media/data it requires to operate

class bascenev1lib.maps.Courtyard

Bases: Map

A courtyard-ish looking map for co-op levels.

defs = <module 'bascenev1lib.mapdata.courtyard' from '/home/runner/work/ballistica/ballistica/.cache/sphinxfiltered/ba_data/bascenev1lib/mapdata/courtyard.py'>

classmethod get_play_types() → list[str]

Return valid play types for this map.

classmethod get_preview_texture_spec() → TextureSpec

Return this map’s preview texture as an asset-package spec.

This is the hook maps should override – typically returning a texture straight off an asset-package wrapper (someassets.textures.my_map_preview). Unlike a loaded texture, a spec can go anywhere a texture is described rather than drawn directly, such as doc-ui pages (the playlist browser shows previews this way). get_preview_texture() loads it.

is_point_near_edge(point: Vec3, running: bool = False) → bool

Return whether the provided point is near an edge of the map.

Simple bot logic uses this call to determine if they are approaching a cliff or wall. If this returns True they will generally not walk/run any farther away from the origin. If ‘running’ is True, the buffer should be a bit larger.

name = 'Courtyard'

classmethod on_preload() → Any

Called when the map is being preloaded.

It should return any media/data it requires to operate

class bascenev1lib.maps.CragCastle

Bases: Map

A lovely castle map.

defs = <module 'bascenev1lib.mapdata.crag_castle' from '/home/runner/work/ballistica/ballistica/.cache/sphinxfiltered/ba_data/bascenev1lib/mapdata/crag_castle.py'>

classmethod get_play_types() → list[str]

Return valid play types for this map.

classmethod get_preview_texture_spec() → TextureSpec

Return this map’s preview texture as an asset-package spec.

This is the hook maps should override – typically returning a texture straight off an asset-package wrapper (someassets.textures.my_map_preview). Unlike a loaded texture, a spec can go anywhere a texture is described rather than drawn directly, such as doc-ui pages (the playlist browser shows previews this way). get_preview_texture() loads it.

name = 'Crag Castle'

classmethod on_preload() → Any

Called when the map is being preloaded.

It should return any media/data it requires to operate

class bascenev1lib.maps.DoomShroom

Bases: Map

A giant mushroom. Of doom!

defs = <module 'bascenev1lib.mapdata.doom_shroom' from '/home/runner/work/ballistica/ballistica/.cache/sphinxfiltered/ba_data/bascenev1lib/mapdata/doom_shroom.py'>

classmethod get_play_types() → list[str]

Return valid play types for this map.

classmethod get_preview_texture_spec() → TextureSpec

Return this map’s preview texture as an asset-package spec.

This is the hook maps should override – typically returning a texture straight off an asset-package wrapper (someassets.textures.my_map_preview). Unlike a loaded texture, a spec can go anywhere a texture is described rather than drawn directly, such as doc-ui pages (the playlist browser shows previews this way). get_preview_texture() loads it.

is_point_near_edge(point: Vec3, running: bool = False) → bool

Return whether the provided point is near an edge of the map.

Simple bot logic uses this call to determine if they are approaching a cliff or wall. If this returns True they will generally not walk/run any farther away from the origin. If ‘running’ is True, the buffer should be a bit larger.

name = 'Doom Shroom'

classmethod on_preload() → Any

Called when the map is being preloaded.

It should return any media/data it requires to operate

class bascenev1lib.maps.FootballStadium

Bases: Map

Stadium map for football games.

defs = <module 'bascenev1lib.mapdata.football_stadium' from '/home/runner/work/ballistica/ballistica/.cache/sphinxfiltered/ba_data/bascenev1lib/mapdata/football_stadium.py'>

classmethod get_play_types() → list[str]

Return valid play types for this map.

classmethod get_preview_texture_spec() → TextureSpec

Return this map’s preview texture as an asset-package spec.

This is the hook maps should override – typically returning a texture straight off an asset-package wrapper (someassets.textures.my_map_preview). Unlike a loaded texture, a spec can go anywhere a texture is described rather than drawn directly, such as doc-ui pages (the playlist browser shows previews this way). get_preview_texture() loads it.

is_point_near_edge(point: Vec3, running: bool = False) → bool

Return whether the provided point is near an edge of the map.

Simple bot logic uses this call to determine if they are approaching a cliff or wall. If this returns True they will generally not walk/run any farther away from the origin. If ‘running’ is True, the buffer should be a bit larger.

name = 'Football Stadium'

classmethod on_preload() → Any

Called when the map is being preloaded.

It should return any media/data it requires to operate

class bascenev1lib.maps.HappyThoughts

Bases: Map

Flying map.

defs = <module 'bascenev1lib.mapdata.happy_thoughts' from '/home/runner/work/ballistica/ballistica/.cache/sphinxfiltered/ba_data/bascenev1lib/mapdata/happy_thoughts.py'>

classmethod get_music_type() → MusicType

Return a music-type string that should be played on this map.

If None is returned, default music will be used.

classmethod get_play_types() → list[str]

Return valid play types for this map.

classmethod get_preview_texture_spec() → TextureSpec

Return this map’s preview texture as an asset-package spec.

This is the hook maps should override – typically returning a texture straight off an asset-package wrapper (someassets.textures.my_map_preview). Unlike a loaded texture, a spec can go anywhere a texture is described rather than drawn directly, such as doc-ui pages (the playlist browser shows previews this way). get_preview_texture() loads it.

name = 'Happy Thoughts'

classmethod on_preload() → Any

Called when the map is being preloaded.

It should return any media/data it requires to operate

class bascenev1lib.maps.HockeyStadium

Bases: Map

Stadium map used for ice hockey games.

defs = <module 'bascenev1lib.mapdata.hockey_stadium' from '/home/runner/work/ballistica/ballistica/.cache/sphinxfiltered/ba_data/bascenev1lib/mapdata/hockey_stadium.py'>

classmethod get_play_types() → list[str]

Return valid play types for this map.

classmethod get_preview_texture_spec() → TextureSpec

Return this map’s preview texture as an asset-package spec.

This is the hook maps should override – typically returning a texture straight off an asset-package wrapper (someassets.textures.my_map_preview). Unlike a loaded texture, a spec can go anywhere a texture is described rather than drawn directly, such as doc-ui pages (the playlist browser shows previews this way). get_preview_texture() loads it.

name = 'Hockey Stadium'

classmethod on_preload() → Any

Called when the map is being preloaded.

It should return any media/data it requires to operate

class bascenev1lib.maps.LakeFrigid

Bases: Map

An icy lake fit for racing.

defs = <module 'bascenev1lib.mapdata.lake_frigid' from '/home/runner/work/ballistica/ballistica/.cache/sphinxfiltered/ba_data/bascenev1lib/mapdata/lake_frigid.py'>

classmethod get_play_types() → list[str]

Return valid play types for this map.

classmethod get_preview_texture_spec() → TextureSpec

Return this map’s preview texture as an asset-package spec.

This is the hook maps should override – typically returning a texture straight off an asset-package wrapper (someassets.textures.my_map_preview). Unlike a loaded texture, a spec can go anywhere a texture is described rather than drawn directly, such as doc-ui pages (the playlist browser shows previews this way). get_preview_texture() loads it.

name = 'Lake Frigid'

classmethod on_preload() → Any

Called when the map is being preloaded.

It should return any media/data it requires to operate

class bascenev1lib.maps.MonkeyFace

Bases: Map

Map sorta shaped like a monkey face; teehee!

defs = <module 'bascenev1lib.mapdata.monkey_face' from '/home/runner/work/ballistica/ballistica/.cache/sphinxfiltered/ba_data/bascenev1lib/mapdata/monkey_face.py'>

classmethod get_play_types() → list[str]

Return valid play types for this map.

classmethod get_preview_texture_spec() → TextureSpec

Return this map’s preview texture as an asset-package spec.

This is the hook maps should override – typically returning a texture straight off an asset-package wrapper (someassets.textures.my_map_preview). Unlike a loaded texture, a spec can go anywhere a texture is described rather than drawn directly, such as doc-ui pages (the playlist browser shows previews this way). get_preview_texture() loads it.

name = 'Monkey Face'

classmethod on_preload() → Any

Called when the map is being preloaded.

It should return any media/data it requires to operate

class bascenev1lib.maps.Rampage

Bases: Map

Wee little map with ramps on the sides.

defs = <module 'bascenev1lib.mapdata.rampage' from '/home/runner/work/ballistica/ballistica/.cache/sphinxfiltered/ba_data/bascenev1lib/mapdata/rampage.py'>

classmethod get_play_types() → list[str]

Return valid play types for this map.

classmethod get_preview_texture_spec() → TextureSpec

Return this map’s preview texture as an asset-package spec.

This is the hook maps should override – typically returning a texture straight off an asset-package wrapper (someassets.textures.my_map_preview). Unlike a loaded texture, a spec can go anywhere a texture is described rather than drawn directly, such as doc-ui pages (the playlist browser shows previews this way). get_preview_texture() loads it.

is_point_near_edge(point: Vec3, running: bool = False) → bool

Return whether the provided point is near an edge of the map.

Simple bot logic uses this call to determine if they are approaching a cliff or wall. If this returns True they will generally not walk/run any farther away from the origin. If ‘running’ is True, the buffer should be a bit larger.

name = 'Rampage'

classmethod on_preload() → Any

Called when the map is being preloaded.

It should return any media/data it requires to operate

class bascenev1lib.maps.Roundabout

Bases: Map

CTF map featuring two platforms and a long way around between them

defs = <module 'bascenev1lib.mapdata.roundabout' from '/home/runner/work/ballistica/ballistica/.cache/sphinxfiltered/ba_data/bascenev1lib/mapdata/roundabout.py'>

classmethod get_play_types() → list[str]

Return valid play types for this map.

classmethod get_preview_texture_spec() → TextureSpec

Return this map’s preview texture as an asset-package spec.

This is the hook maps should override – typically returning a texture straight off an asset-package wrapper (someassets.textures.my_map_preview). Unlike a loaded texture, a spec can go anywhere a texture is described rather than drawn directly, such as doc-ui pages (the playlist browser shows previews this way). get_preview_texture() loads it.

name = 'Roundabout'

classmethod on_preload() → Any

Called when the map is being preloaded.

It should return any media/data it requires to operate

class bascenev1lib.maps.StepRightUp

Bases: Map

Wide stepped map good for CTF or Assault.

defs = <module 'bascenev1lib.mapdata.step_right_up' from '/home/runner/work/ballistica/ballistica/.cache/sphinxfiltered/ba_data/bascenev1lib/mapdata/step_right_up.py'>

classmethod get_play_types() → list[str]

Return valid play types for this map.

classmethod get_preview_texture_spec() → TextureSpec

Return this map’s preview texture as an asset-package spec.

This is the hook maps should override – typically returning a texture straight off an asset-package wrapper (someassets.textures.my_map_preview). Unlike a loaded texture, a spec can go anywhere a texture is described rather than drawn directly, such as doc-ui pages (the playlist browser shows previews this way). get_preview_texture() loads it.

name = 'Step Right Up'

classmethod on_preload() → Any

Called when the map is being preloaded.

It should return any media/data it requires to operate

class bascenev1lib.maps.ThePad(main_menu_style: bool = False)

Bases: Map

A simple square shaped map with a raised edge.

defs = <module 'bascenev1lib.mapdata.the_pad' from '/home/runner/work/ballistica/ballistica/.cache/sphinxfiltered/ba_data/bascenev1lib/mapdata/the_pad.py'>

classmethod get_play_types() → list[str]

Return valid play types for this map.

classmethod get_preview_texture_spec() → TextureSpec

Return this map’s preview texture as an asset-package spec.

This is the hook maps should override – typically returning a texture straight off an asset-package wrapper (someassets.textures.my_map_preview). Unlike a loaded texture, a spec can go anywhere a texture is described rather than drawn directly, such as doc-ui pages (the playlist browser shows previews this way). get_preview_texture() loads it.

name = 'The Pad'

classmethod on_preload() → Any

Called when the map is being preloaded.

It should return any media/data it requires to operate

class bascenev1lib.maps.TipTop

Bases: Map

A pointy map good for king-of-the-hill-ish games.

defs = <module 'bascenev1lib.mapdata.tip_top' from '/home/runner/work/ballistica/ballistica/.cache/sphinxfiltered/ba_data/bascenev1lib/mapdata/tip_top.py'>

classmethod get_play_types() → list[str]

Return valid play types for this map.

classmethod get_preview_texture_spec() → TextureSpec

Return this map’s preview texture as an asset-package spec.

This is the hook maps should override – typically returning a texture straight off an asset-package wrapper (someassets.textures.my_map_preview). Unlike a loaded texture, a spec can go anywhere a texture is described rather than drawn directly, such as doc-ui pages (the playlist browser shows previews this way). get_preview_texture() loads it.

name = 'Tip Top'

classmethod on_preload() → Any

Called when the map is being preloaded.

It should return any media/data it requires to operate

class bascenev1lib.maps.TowerD

Bases: Map

Map used for runaround mini-game.

defs = <module 'bascenev1lib.mapdata.tower_d' from '/home/runner/work/ballistica/ballistica/.cache/sphinxfiltered/ba_data/bascenev1lib/mapdata/tower_d.py'>

classmethod get_play_types() → list[str]

Return valid play types for this map.

classmethod get_preview_texture_spec() → TextureSpec

Return this map’s preview texture as an asset-package spec.

This is the hook maps should override – typically returning a texture straight off an asset-package wrapper (someassets.textures.my_map_preview). Unlike a loaded texture, a spec can go anywhere a texture is described rather than drawn directly, such as doc-ui pages (the playlist browser shows previews this way). get_preview_texture() loads it.

is_point_near_edge(point: Vec3, running: bool = False) → bool

Return whether the provided point is near an edge of the map.

Simple bot logic uses this call to determine if they are approaching a cliff or wall. If this returns True they will generally not walk/run any farther away from the origin. If ‘running’ is True, the buffer should be a bit larger.

name = 'Tower D'

classmethod on_preload() → Any

Called when the map is being preloaded.

It should return any media/data it requires to operate

class bascenev1lib.maps.ZigZag

Bases: Map

A very long zig-zaggy map

defs = <module 'bascenev1lib.mapdata.zig_zag' from '/home/runner/work/ballistica/ballistica/.cache/sphinxfiltered/ba_data/bascenev1lib/mapdata/zig_zag.py'>

classmethod get_play_types() → list[str]

Return valid play types for this map.

classmethod get_preview_texture_spec() → TextureSpec

Return this map’s preview texture as an asset-package spec.

This is the hook maps should override – typically returning a texture straight off an asset-package wrapper (someassets.textures.my_map_preview). Unlike a loaded texture, a spec can go anywhere a texture is described rather than drawn directly, such as doc-ui pages (the playlist browser shows previews this way). get_preview_texture() loads it.

name = 'Zigzag'

classmethod on_preload() → Any

Called when the map is being preloaded.

It should return any media/data it requires to operate

bascenev1lib.maps.register_all_maps() → None

Registering all maps.

bascenev1lib.tutorial module

Wrangles the game tutorial sequence.

class bascenev1lib.tutorial.AnalyticsScreen(screen: str)

Bases: object

run(a: TutorialActivity) → None

class bascenev1lib.tutorial.Bomb(delay: int = 0, release: bool = True, release_delay: int = 500)

Bases: ButtonPress

class bascenev1lib.tutorial.BombRelease(delay: int = 0)

Bases: ButtonRelease

class bascenev1lib.tutorial.ButtonPress(button: str, delay: int = 0, release: bool = True, release_delay: int = 0)

Bases: object

run(a: TutorialActivity) → None

class bascenev1lib.tutorial.ButtonRelease(button: str, delay: int = 0)

Bases: object

run(a: TutorialActivity) → None

class bascenev1lib.tutorial.Celebrate(celebrate_type: str = 'both', spaz_num: int | None = None, duration: int = 1000)

Bases: object

run(a: TutorialActivity) → None

class bascenev1lib.tutorial.Delay(time: int)

Bases: object

run(a: TutorialActivity) → int

class bascenev1lib.tutorial.DelayOld(time: int)

Bases: object

run(a: TutorialActivity) → int

class bascenev1lib.tutorial.DelayOld2(time: int)

Bases: object

run(a: TutorialActivity) → int

class bascenev1lib.tutorial.End

Bases: object

run(a: TutorialActivity) → None

class bascenev1lib.tutorial.Jump(delay: int = 0, release: bool = True, release_delay: int = 500)

Bases: ButtonPress

class bascenev1lib.tutorial.JumpRelease(delay: int = 0)

Bases: ButtonRelease

class bascenev1lib.tutorial.KillSpaz(num: int, explode: bool = False)

Bases: object

run(a: TutorialActivity) → None

class bascenev1lib.tutorial.Move(x: float, y: float)

Bases: object

run(a: TutorialActivity) → None

class bascenev1lib.tutorial.MoveLR(x: float)

Bases: object

run(a: TutorialActivity) → None

class bascenev1lib.tutorial.MoveUD(y: float)

Bases: object

run(a: TutorialActivity) → None

class bascenev1lib.tutorial.PickUp(delay: int = 0, release: bool = True, release_delay: int = 500)

Bases: ButtonPress

class bascenev1lib.tutorial.PickUpRelease(delay: int = 0)

Bases: ButtonRelease

class bascenev1lib.tutorial.Player

Bases: Player[Team]

Our player type for this game.

class bascenev1lib.tutorial.Powerup(num: int, position: Sequence[float], *, color: Sequence[float] = (1.0, 1.0, 1.0), make_current: bool = False, relative_to: int | None = None)

Bases: object

run(a: TutorialActivity) → None

class bascenev1lib.tutorial.PrintPos(spaz_num: int | None = None)

Bases: object

run(a: TutorialActivity) → None

class bascenev1lib.tutorial.Punch(delay: int = 0, release: bool = True, release_delay: int = 500)

Bases: ButtonPress

class bascenev1lib.tutorial.PunchRelease(delay: int = 0)

Bases: ButtonRelease

class bascenev1lib.tutorial.RemoveGloves

Bases: object

run(a: TutorialActivity) → None

class bascenev1lib.tutorial.Reset

Bases: object

run(a: TutorialActivity) → None

class bascenev1lib.tutorial.RestorePos(pos: Sequence[float])

Bases: object

run(a: TutorialActivity) → None

class bascenev1lib.tutorial.Run(delay: int = 0, release: bool = True, release_delay: int = 500)

Bases: ButtonPress

class bascenev1lib.tutorial.RunRelease(delay: int = 0)

Bases: ButtonRelease

class bascenev1lib.tutorial.SetSpeed(speed: int)

Bases: object

run(a: TutorialActivity) → None

class bascenev1lib.tutorial.ShowControls

Bases: object

run(a: TutorialActivity) → None

class bascenev1lib.tutorial.SpawnSpaz(num: int, position: Sequence[float], *, color: Sequence[float] = (1.0, 1.0, 1.0), make_current: bool = False, relative_to: int | None = None, name: str | Lstr | LangStr = '', flash: bool = True, angle: float = 0.0)

Bases: object

run(a: TutorialActivity) → None

class bascenev1lib.tutorial.Team

Bases: Team[Player]

Our team type for this game.

class bascenev1lib.tutorial.Text(text: str | Lstr | LangStr)

Bases: object

run(a: TutorialActivity) → None

class bascenev1lib.tutorial.TutorialActivity(settings: dict | None = None)

Bases: Activity[Player, Team]

legacy_spaz_limbs = True

If True, spazzes in this activity get the older (pre-1.8) spaz physics: limbs simulated in the main sim instead of on the background-dynamics rig, and punches placed at the end of the punching arm. For content calibrated against the old physics, such as the tutorial’s recorded input script.

on_begin() → None

Called once the previous activity has finished transitioning out.

At this point the activity’s initial players and teams are filled in and it should begin its actual game logic.

on_player_join(player: Player) → None

Called when a player joins the activity.

(including the initial set of players)

on_player_leave(player: Player) → None

Called when a player is leaving the Activity.

on_transition_in() → None

Called when the activity is first becoming visible.

Upon this call, the activity should fade in backgrounds, start playing music, etc. It does not yet have access to players or teams, however. They remain owned by the previous activity up until on_begin() is called.

set_stick_image_position(x: float, y: float) → None