Light2D

Light2D

Inherits: Node2D < CanvasItem < Node < Object

Casts light in a 2D environment.

Description

Casts light in a 2D environment. Light is defined by a (usually grayscale) texture, a color, an energy value, a mode (see constants), and various other parameters (range and shadows-related).

Note: Light2D can also be used as a mask.

Tutorials

2D 灯光和阴影

Properties

Color	color	`Color( 1, 1, 1, 1 )`
bool	editor_only	`false`
bool	enabled	`true`
float	energy	`1.0`
Mode	mode	`0`
Vector2	offset	`Vector2( 0, 0 )`
float	range_height	`0.0`
int	range_item_cull_mask	`1`
int	range_layer_max	`0`
int	range_layer_min	`0`
int	range_z_max	`1024`
int	range_z_min	`-1024`
int	shadow_buffer_size	`2048`
Color	shadow_color	`Color( 0, 0, 0, 0 )`
bool	shadow_enabled	`false`
ShadowFilter	shadow_filter	`0`
float	shadow_filter_smooth	`0.0`
float	shadow_gradient_length	`0.0`
int	shadow_item_cull_mask	`1`
Texture	texture
float	texture_scale	`1.0`

Enumerations

enum Mode:

MODE_ADD = 0 —- Adds the value of pixels corresponding to the Light2D to the values of pixels under it. This is the common behavior of a light.
MODE_SUB = 1 —- Subtracts the value of pixels corresponding to the Light2D to the values of pixels under it, resulting in inversed light effect.
MODE_MIX = 2 —- Mix the value of pixels corresponding to the Light2D to the values of pixels under it by linear interpolation.
MODE_MASK = 3 —- The light texture of the Light2D is used as a mask, hiding or revealing parts of the screen underneath depending on the value of each pixel of the light (mask) texture.

enum ShadowFilter:

SHADOW_FILTER_NONE = 0 —- No filter applies to the shadow map. See shadow_filter.
SHADOW_FILTER_PCF3 = 1 —- Percentage closer filtering (3 samples) applies to the shadow map. See shadow_filter.
SHADOW_FILTER_PCF5 = 2 —- Percentage closer filtering (5 samples) applies to the shadow map. See shadow_filter.
SHADOW_FILTER_PCF7 = 3 —- Percentage closer filtering (7 samples) applies to the shadow map. See shadow_filter.
SHADOW_FILTER_PCF9 = 4 —- Percentage closer filtering (9 samples) applies to the shadow map. See shadow_filter.
SHADOW_FILTER_PCF13 = 5 —- Percentage closer filtering (13 samples) applies to the shadow map. See shadow_filter.

Property Descriptions

Color color

Default	`Color( 1, 1, 1, 1 )`
Setter	set_color(value)
Getter	get_color()

The Light2D’s Color.

bool editor_only

Default	`false`
Setter	set_editor_only(value)
Getter	is_editor_only()

If true, Light2D will only appear when editing the scene.

bool enabled

Default	`true`
Setter	set_enabled(value)
Getter	is_enabled()

If true, Light2D will emit light.

float energy

Default	`1.0`
Setter	set_energy(value)
Getter	get_energy()

The Light2D’s energy value. The larger the value, the stronger the light.

Mode mode

Default	`0`
Setter	set_mode(value)
Getter	get_mode()

The Light2D’s mode. See Mode constants for values.

Vector2 offset

Default	`Vector2( 0, 0 )`
Setter	set_texture_offset(value)
Getter	get_texture_offset()

The offset of the Light2D’s texture.

float range_height

Default	`0.0`
Setter	set_height(value)
Getter	get_height()

The height of the Light2D. Used with 2D normal mapping.

int range_item_cull_mask

Default	`1`
Setter	set_item_cull_mask(value)
Getter	get_item_cull_mask()

The layer mask. Only objects with a matching mask will be affected by the Light2D.

int range_layer_max

Default	`0`
Setter	set_layer_range_max(value)
Getter	get_layer_range_max()

Maximum layer value of objects that are affected by the Light2D.

int range_layer_min

Default	`0`
Setter	set_layer_range_min(value)
Getter	get_layer_range_min()

Minimum layer value of objects that are affected by the Light2D.

int range_z_max

Default	`1024`
Setter	set_z_range_max(value)
Getter	get_z_range_max()

Maximum z value of objects that are affected by the Light2D.

int range_z_min

Default	`-1024`
Setter	set_z_range_min(value)
Getter	get_z_range_min()

Minimum z value of objects that are affected by the Light2D.

int shadow_buffer_size

Default	`2048`
Setter	set_shadow_buffer_size(value)
Getter	get_shadow_buffer_size()

Shadow buffer size.

Color shadow_color

Default	`Color( 0, 0, 0, 0 )`
Setter	set_shadow_color(value)
Getter	get_shadow_color()

Color of shadows cast by the Light2D.

bool shadow_enabled

Default	`false`
Setter	set_shadow_enabled(value)
Getter	is_shadow_enabled()

If true, the Light2D will cast shadows.

ShadowFilter shadow_filter

Default	`0`
Setter	set_shadow_filter(value)
Getter	get_shadow_filter()

Shadow filter type. See ShadowFilter for possible values.

float shadow_filter_smooth

Default	`0.0`
Setter	set_shadow_smooth(value)
Getter	get_shadow_smooth()

Smoothing value for shadows.

float shadow_gradient_length

Default	`0.0`
Setter	set_shadow_gradient_length(value)
Getter	get_shadow_gradient_length()

Smooth shadow gradient length.

int shadow_item_cull_mask

Default	`1`
Setter	set_item_shadow_cull_mask(value)
Getter	get_item_shadow_cull_mask()

The shadow mask. Used with LightOccluder2D to cast shadows. Only occluders with a matching light mask will cast shadows.

Texture texture

Setter	set_texture(value)
Getter	get_texture()

Texture used for the Light2D’s appearance.

float texture_scale

Default	`1.0`
Setter	set_texture_scale(value)
Getter	get_texture_scale()

The texture‘s scale factor.