DirectionalLight

Inherits: Light < VisualInstance < CullInstance < Spatial < Node < Object

Directional light from a distance, as from the Sun.

Description

A directional light is a type of Light node that models an infinite number of parallel rays covering the entire scene. It is used for lights with strong intensity that are located far away from the scene to model sunlight or moonlight. The worldspace location of the DirectionalLight transform (origin) is ignored. Only the basis is used to determine light direction.

Tutorials

Properties

float

directional_shadow_bias_split_scale

0.25

bool

directional_shadow_blend_splits

false

ShadowDepthRange

directional_shadow_depth_range

0

float

directional_shadow_max_distance

100.0

ShadowMode

directional_shadow_mode

2

float

directional_shadow_normal_bias

0.8

float

directional_shadow_split_1

0.1

float

directional_shadow_split_2

0.2

float

directional_shadow_split_3

0.5

float

shadow_bias

0.1 (overrides Light)

Enumerations

enum ShadowMode:

  • SHADOW_ORTHOGONAL = 0 --- Renders the entire scene's shadow map from an orthogonal point of view. This is the fastest directional shadow mode. May result in blurrier shadows on close objects.

  • SHADOW_PARALLEL_2_SPLITS = 1 --- Splits the view frustum in 2 areas, each with its own shadow map. This shadow mode is a compromise between SHADOW_ORTHOGONAL and SHADOW_PARALLEL_4_SPLITS in terms of performance.

  • SHADOW_PARALLEL_4_SPLITS = 2 --- Splits the view frustum in 4 areas, each with its own shadow map. This is the slowest directional shadow mode.


enum ShadowDepthRange:

  • SHADOW_DEPTH_RANGE_STABLE = 0 --- Keeps the shadow stable when the camera moves, at the cost of lower effective shadow resolution.

  • SHADOW_DEPTH_RANGE_OPTIMIZED = 1 --- Tries to achieve maximum shadow resolution. May result in saw effect on shadow edges. This mode typically works best in games where the camera will often move at high speeds, such as most racing games.

Property Descriptions

  • float directional_shadow_bias_split_scale

Default

0.25

Setter

set_param(value)

Getter

get_param()

Amount of extra bias for shadow splits that are far away. If self-shadowing occurs only on the splits far away, increasing this value can fix them.


  • bool directional_shadow_blend_splits

Default

false

Setter

set_blend_splits(value)

Getter

is_blend_splits_enabled()

If true, shadow detail is sacrificed in exchange for smoother transitions between splits.


Default

0

Setter

set_shadow_depth_range(value)

Getter

get_shadow_depth_range()

Optimizes shadow rendering for detail versus movement. See ShadowDepthRange.


  • float directional_shadow_max_distance

Default

100.0

Setter

set_param(value)

Getter

get_param()

The maximum distance for shadow splits.


Default

2

Setter

set_shadow_mode(value)

Getter

get_shadow_mode()

The light's shadow rendering algorithm. See ShadowMode.


  • float directional_shadow_normal_bias

Default

0.8

Setter

set_param(value)

Getter

get_param()

Can be used to fix special cases of self shadowing when objects are perpendicular to the light.


  • float directional_shadow_split_1

Default

0.1

Setter

set_param(value)

Getter

get_param()

The distance from camera to shadow split 1. Relative to directional_shadow_max_distance. Only used when directional_shadow_mode is SHADOW_PARALLEL_2_SPLITS or SHADOW_PARALLEL_4_SPLITS.


  • float directional_shadow_split_2

Default

0.2

Setter

set_param(value)

Getter

get_param()

The distance from shadow split 1 to split 2. Relative to directional_shadow_max_distance. Only used when directional_shadow_mode is SHADOW_PARALLEL_2_SPLITS or SHADOW_PARALLEL_4_SPLITS.


  • float directional_shadow_split_3

Default

0.5

Setter

set_param(value)

Getter

get_param()

The distance from shadow split 2 to split 3. Relative to directional_shadow_max_distance. Only used when directional_shadow_mode is SHADOW_PARALLEL_4_SPLITS.