PointLight

Qualified name: algan.rendering.lights.PointLight

class PointLight(*args, intensity=1.0, decay=0.0, distance=0.0, shadow_radius=0.0, **kwargs)

Bases: Light

Omnidirectional light emitting from a single point.

Parameters:

• intensity – As on Light: a dimensionless multiplier on the light’s color, animatable like any Mob attribute. Defaults to 1.0.

• decay – Distance falloff exponent (0 = none – the legacy Algan default; 2 = physically correct inverse-square).

• distance – Maximum range of the light (0 = unlimited). When set, the light fades out smoothly toward this distance.

• shadow_radius – World-space radius of the emitting disk used for soft shadows (0 = sharp/hard shadows).

Methods

Attributes

animation_manager	This mob's scene-owned animation manager.
basis	The Mob's orientation and scale, as a flattened 3x3 matrix of shape (*, 9).
casts_shadows	Whether this Mob's geometry blocks light on its way from a light source to another surface -- whether it casts a shadow.
children	The Mobs attached below this one, in attachment order.
closed_shell	Whether this Mob's triangles form a CLOSED shell -- every camera ray that enters the geometry crosses a second time on its way out.
draws_descendants	Whether get_render_primitives returns geometry belonging to this Mob's DESCENDANTS as well as its own.
forward	Get the direction the Mob is facing.
lifespan	This mob's [spawn, despawn) interval on its Scene timeline (a Lifespan).
light_type
location	The Mob's position in world space, shape (*, 3).
normalized_basis	The Mob's orientation with scale divided out, shape (*, 9).
parents	The Mobs this one is attached to, in attachment order.
receives_shadows	Whether this Mob's surfaces are darkened by shadows cast onto them.
right	Get the Mob's own rightward direction.
scale_coefficient	The Mob's scale along its own right, up and forward axes, shape (*, 3).
two_sided	Whether this Mob's geometry should be lit from whichever side the ray arrives on.
up	Get the Mob's own upward direction.
x	The Mob's x coordinate in world units, shape (*, 1).
xy	The Mob's x and y coordinates in world units, shape (*, 2).
y	The Mob's y coordinate in world units, shape (*, 1).
z	The Mob's z coordinate in world units, shape (*, 1).