DatumHueEnterprise v0.0.24datumhue.com
Contents

handle5 methods, 1 fieldUI apps only

PhysicsWorld

An isolated physics world created by datumhue.physics.world(). Bodies join it via add_body{world = ...}; queries and gravity are scoped to it.

Obtained from
datumhue.physics.world
Accepted by
SceneNode:add_body, DrawCanvas:body, DrawPrimitive:add_body

The examples on this page start from:

lua
local vec3 = datumhue.math.vec3
local canvas =
    datumhue.draw.new({ background = datumhue.color("#2d353b") })
canvas:mount({ width = 400, height = 300 })
local world = datumhue.physics.world()
local floor =
    canvas:rect({ pos = vec3(-200, -150, 0), width = 400, height = 20 })
floor:add_body({ type = "static", world = world })

Fields 1

FieldTypeAccessDescription
gravityVec3read/writeThis world's gravity vector (Y-up; default {0, -9.81, 0}). 2D bodies feel its X/Y components. Assign a vec2/vec3.
Example
-- Each world falls its own way.
world.gravity = vec3(0, 200, 0)
print(world.gravity) --> vec3(0.0, 200.0, 0.0)
print(datumhue.physics.gravity) --> vec3(0.0, -9.8100004196167, 0.0)

Methods 5

PhysicsWorld:raycast

method
PhysicsWorld:raycast(ray: Ray, options?: physics.RaycastOptions) -> physics.RayHit?

Cast a ray and return the nearest body hit, or nil. An options value that is not a table is ignored.

Example
-- New bodies are found once the simulation has stepped.
datumhue.time.sleep(0.1)
local down = datumhue.math.ray(vec3(0, 100, 0), vec3(0, -1, 0))
print(world:raycast(down, { max_distance = 500 }).distance) --> 230.0
-- The app's own world holds no floor.
print(datumhue.physics.raycast(down)) --> nil

options physics.RaycastOptions options 4 keys

KeyTypeDefaultDescription
max_distancenumber1000000Maximum ray length in world units, 0 or more; math.huge casts without a limit.
layersinteger[]every layerOnly hit bodies in these layer bit indices 0..=31.
excludeDrawPrimitive | SceneNode | Voxelno body is ignoredA body to ignore.
solidbooleantrueCount a ray starting inside a collider as a hit at distance 0.

returns physics.RayHit record 4 keys

KeyTypeDescription
bodyDrawPrimitive | SceneNode | VoxelThe body that was hit.
pointVec3World-space contact point.
normalVec3World-space surface normal at the hit.
distancenumberDistance from the origin to the hit.

PhysicsWorld:raycast_all

method
PhysicsWorld:raycast_all(ray: Ray, options?: physics.RaycastAllOptions) -> physics.RayHit[]

Cast a ray and return every body along it, nearest first. An options value that is not a table is ignored.

options physics.RaycastAllOptions options 5 keys, 4 inherited

KeyTypeDefaultDescription
max_hitsinteger64Maximum hits to return, 0 or more.
From physics.RaycastOptions
max_distancenumber1000000Maximum ray length in world units, 0 or more; math.huge casts without a limit.
layersinteger[]every layerOnly hit bodies in these layer bit indices 0..=31.
excludeDrawPrimitive | SceneNode | Voxelno body is ignoredA body to ignore.
solidbooleantrueCount a ray starting inside a collider as a hit at distance 0.

returns physics.RayHit record 4 keys

KeyTypeDescription
bodyDrawPrimitive | SceneNode | VoxelThe body that was hit.
pointVec3World-space contact point.
normalVec3World-space surface normal at the hit.
distancenumberDistance from the origin to the hit.

PhysicsWorld:point_query

method
PhysicsWorld:point_query(point: Vec2 | Vec3, options?: physics.PointQueryOptions) -> (DrawPrimitive | SceneNode | Voxel)[]

Return every body whose collider overlaps the given world-space point. An options value that is not a table is ignored.

options physics.PointQueryOptions options 2 keys

KeyTypeDefaultDescription
layersinteger[]every layerOnly include bodies in these layer bit indices 0..=31.
excludeDrawPrimitive | SceneNode | Voxelno body is ignoredA body to ignore.

PhysicsWorld:shapecast

method
PhysicsWorld:shapecast(ray: Ray, options: physics.ShapecastOptions) -> physics.RayHit?

Sweep a 3D collider shape along the ray and return the nearest body hit, or nil.

options physics.ShapecastOptions options 9 keys

KeyTypeDefaultDescription
shapephysics.Shape"cube"3D collider shape to cast.
widthnumber1Box width.
heightnumber1Box height / capsule length.
depthnumber1Box depth.
radiusnumber0.5Sphere / capsule / cylinder / cone radius.
rotationQuatdatumhue.math.quat.identity()Shape orientation.
max_distancenumber1000000Maximum cast length in world units, 0 or more; math.huge casts without a limit.
layersinteger[]every layerOnly hit bodies in these layer bit indices 0..=31.
excludeDrawPrimitive | SceneNode | Voxelno body is ignoredA body to ignore.

returns physics.RayHit record 4 keys

KeyTypeDescription
bodyDrawPrimitive | SceneNode | VoxelThe body that was hit.
pointVec3World-space contact point.
normalVec3World-space surface normal at the hit.
distancenumberDistance from the origin to the hit.

PhysicsWorld:remove

method
PhysicsWorld:remove()

Drop this world and every body and joint simulating in it.

datumhue.com

(c) 2026 Shuusei AB. Quote excerpts of this manual, with attribution to DatumHue, in your own documentation, tutorials, course materials, reviews, and other writing or video. Republishing it in whole or in substantial part needs written permission: support@datumhue.com.

Victor Mono is licensed under the SIL Open Font License 1.1
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This Font Software is licensed under the SIL Open Font License, Version 1.1.
This license is copied below, and is also available with a FAQ at:
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