LightSource class

Describes a light source in the 3-D scene.

three_d_ui_builder uses this to compute dynamic shadows and surface highlights in the painter layer. All shading is approximated using custom painters — no GPU hardware lighting is used.

Three types are supported:

Annotations

Constructors

LightSource.ambient({Color color = Colors.white, double intensity = 0.3})
Uniform ambient light — no direction, no shadows.
const
LightSource.directional({Vec3 direction = const Vec3(-0.4, -0.8, 0.4), Color color = Colors.white, double intensity = 0.9})
A directional light shining from direction.
const
LightSource.point({required Vec3 position, Color color = Colors.white, double intensity = 1.0, double radius = 400})
A point light at position with decay radius.
const

Properties

color → Color
Colour of the emitted light.
final
direction → Vec3
Light direction (used by LightType.directional; should be normalised).
final
hashCode → int
The hash code for this object.
no setterinherited
intensity → double
Intensity multiplier in 0, 1.
final
position → Vec3
World-space position (used by LightType.point).
final
radius → double
Maximum reach of a LightType.point light in logical pixels.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
type → LightType
final

Methods

diffuseFactor(Vec3 point, Vec3 normal) → double
Computes the diffuse lighting factor 0, 1 for a surface at point with the given outward normal.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited