563 lines
21 KiB
ReStructuredText
563 lines
21 KiB
ReStructuredText
:github_url: hide
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.. DO NOT EDIT THIS FILE!!!
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.. Generated automatically from Godot engine sources.
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.. Generator: https://github.com/godotengine/godot/tree/3.6/doc/tools/make_rst.py.
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.. XML source: https://github.com/godotengine/godot/tree/3.6/doc/classes/Light.xml.
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.. _class_Light:
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Light
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=====
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**Inherits:** :ref:`VisualInstance<class_VisualInstance>` **<** :ref:`CullInstance<class_CullInstance>` **<** :ref:`Spatial<class_Spatial>` **<** :ref:`Node<class_Node>` **<** :ref:`Object<class_Object>`
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**Inherited By:** :ref:`DirectionalLight<class_DirectionalLight>`, :ref:`OmniLight<class_OmniLight>`, :ref:`SpotLight<class_SpotLight>`
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Provides a base class for different kinds of light nodes.
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.. rst-class:: classref-introduction-group
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Description
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-----------
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Light is the *abstract* base class for light nodes. As it can't be instanced, it shouldn't be used directly. Other types of light nodes inherit from it. Light contains the common variables and parameters used for lighting.
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.. rst-class:: classref-introduction-group
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Tutorials
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---------
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- :doc:`3D lights and shadows <../tutorials/3d/lights_and_shadows>`
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- `Third Person Shooter Demo <https://godotengine.org/asset-library/asset/678>`__
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.. rst-class:: classref-reftable-group
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Properties
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----------
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.. table::
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:widths: auto
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+--------------------------------------+--------------------------------------------------------------------------------+-------------------------+
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| :ref:`bool<class_bool>` | :ref:`editor_only<class_Light_property_editor_only>` | ``false`` |
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+--------------------------------------+--------------------------------------------------------------------------------+-------------------------+
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| :ref:`BakeMode<enum_Light_BakeMode>` | :ref:`light_bake_mode<class_Light_property_light_bake_mode>` | ``1`` |
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+--------------------------------------+--------------------------------------------------------------------------------+-------------------------+
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| :ref:`Color<class_Color>` | :ref:`light_color<class_Light_property_light_color>` | ``Color( 1, 1, 1, 1 )`` |
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+--------------------------------------+--------------------------------------------------------------------------------+-------------------------+
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| :ref:`int<class_int>` | :ref:`light_cull_mask<class_Light_property_light_cull_mask>` | ``4294967295`` |
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+--------------------------------------+--------------------------------------------------------------------------------+-------------------------+
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| :ref:`float<class_float>` | :ref:`light_energy<class_Light_property_light_energy>` | ``1.0`` |
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+--------------------------------------+--------------------------------------------------------------------------------+-------------------------+
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| :ref:`float<class_float>` | :ref:`light_indirect_energy<class_Light_property_light_indirect_energy>` | ``1.0`` |
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+--------------------------------------+--------------------------------------------------------------------------------+-------------------------+
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| :ref:`bool<class_bool>` | :ref:`light_negative<class_Light_property_light_negative>` | ``false`` |
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+--------------------------------------+--------------------------------------------------------------------------------+-------------------------+
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| :ref:`float<class_float>` | :ref:`light_size<class_Light_property_light_size>` | ``0.0`` |
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+--------------------------------------+--------------------------------------------------------------------------------+-------------------------+
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| :ref:`float<class_float>` | :ref:`light_specular<class_Light_property_light_specular>` | ``0.5`` |
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+--------------------------------------+--------------------------------------------------------------------------------+-------------------------+
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| :ref:`float<class_float>` | :ref:`shadow_bias<class_Light_property_shadow_bias>` | ``0.15`` |
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+--------------------------------------+--------------------------------------------------------------------------------+-------------------------+
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| :ref:`Color<class_Color>` | :ref:`shadow_color<class_Light_property_shadow_color>` | ``Color( 0, 0, 0, 1 )`` |
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+--------------------------------------+--------------------------------------------------------------------------------+-------------------------+
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| :ref:`float<class_float>` | :ref:`shadow_contact<class_Light_property_shadow_contact>` | ``0.0`` |
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+--------------------------------------+--------------------------------------------------------------------------------+-------------------------+
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| :ref:`bool<class_bool>` | :ref:`shadow_enabled<class_Light_property_shadow_enabled>` | ``false`` |
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+--------------------------------------+--------------------------------------------------------------------------------+-------------------------+
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| :ref:`bool<class_bool>` | :ref:`shadow_reverse_cull_face<class_Light_property_shadow_reverse_cull_face>` | ``false`` |
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+--------------------------------------+--------------------------------------------------------------------------------+-------------------------+
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.. rst-class:: classref-reftable-group
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Methods
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-------
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.. table::
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:widths: auto
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+---------------------------+----------------------------------------------------------------------------------------------------------------------------------+
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| :ref:`float<class_float>` | :ref:`get_param<class_Light_method_get_param>` **(** :ref:`Param<enum_Light_Param>` param **)** |const| |
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+---------------------------+----------------------------------------------------------------------------------------------------------------------------------+
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| void | :ref:`set_param<class_Light_method_set_param>` **(** :ref:`Param<enum_Light_Param>` param, :ref:`float<class_float>` value **)** |
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+---------------------------+----------------------------------------------------------------------------------------------------------------------------------+
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.. rst-class:: classref-section-separator
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----
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.. rst-class:: classref-descriptions-group
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Enumerations
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------------
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.. _enum_Light_Param:
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.. rst-class:: classref-enumeration
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enum **Param**:
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.. _class_Light_constant_PARAM_ENERGY:
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.. rst-class:: classref-enumeration-constant
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:ref:`Param<enum_Light_Param>` **PARAM_ENERGY** = ``0``
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Constant for accessing :ref:`light_energy<class_Light_property_light_energy>`.
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.. _class_Light_constant_PARAM_INDIRECT_ENERGY:
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.. rst-class:: classref-enumeration-constant
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:ref:`Param<enum_Light_Param>` **PARAM_INDIRECT_ENERGY** = ``1``
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Constant for accessing :ref:`light_indirect_energy<class_Light_property_light_indirect_energy>`.
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.. _class_Light_constant_PARAM_SIZE:
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.. rst-class:: classref-enumeration-constant
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:ref:`Param<enum_Light_Param>` **PARAM_SIZE** = ``2``
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Constant for accessing :ref:`light_size<class_Light_property_light_size>`.
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.. _class_Light_constant_PARAM_SPECULAR:
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.. rst-class:: classref-enumeration-constant
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:ref:`Param<enum_Light_Param>` **PARAM_SPECULAR** = ``3``
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Constant for accessing :ref:`light_specular<class_Light_property_light_specular>`.
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.. _class_Light_constant_PARAM_RANGE:
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.. rst-class:: classref-enumeration-constant
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:ref:`Param<enum_Light_Param>` **PARAM_RANGE** = ``4``
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Constant for accessing :ref:`OmniLight.omni_range<class_OmniLight_property_omni_range>` or :ref:`SpotLight.spot_range<class_SpotLight_property_spot_range>`.
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.. _class_Light_constant_PARAM_ATTENUATION:
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.. rst-class:: classref-enumeration-constant
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:ref:`Param<enum_Light_Param>` **PARAM_ATTENUATION** = ``5``
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Constant for accessing :ref:`OmniLight.omni_attenuation<class_OmniLight_property_omni_attenuation>` or :ref:`SpotLight.spot_attenuation<class_SpotLight_property_spot_attenuation>`.
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.. _class_Light_constant_PARAM_SPOT_ANGLE:
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.. rst-class:: classref-enumeration-constant
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:ref:`Param<enum_Light_Param>` **PARAM_SPOT_ANGLE** = ``6``
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Constant for accessing :ref:`SpotLight.spot_angle<class_SpotLight_property_spot_angle>`.
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.. _class_Light_constant_PARAM_SPOT_ATTENUATION:
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.. rst-class:: classref-enumeration-constant
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:ref:`Param<enum_Light_Param>` **PARAM_SPOT_ATTENUATION** = ``7``
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Constant for accessing :ref:`SpotLight.spot_angle_attenuation<class_SpotLight_property_spot_angle_attenuation>`.
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.. _class_Light_constant_PARAM_CONTACT_SHADOW_SIZE:
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.. rst-class:: classref-enumeration-constant
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:ref:`Param<enum_Light_Param>` **PARAM_CONTACT_SHADOW_SIZE** = ``8``
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Constant for accessing :ref:`shadow_contact<class_Light_property_shadow_contact>`.
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.. _class_Light_constant_PARAM_SHADOW_MAX_DISTANCE:
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.. rst-class:: classref-enumeration-constant
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:ref:`Param<enum_Light_Param>` **PARAM_SHADOW_MAX_DISTANCE** = ``9``
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Constant for accessing :ref:`DirectionalLight.directional_shadow_max_distance<class_DirectionalLight_property_directional_shadow_max_distance>`.
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.. _class_Light_constant_PARAM_SHADOW_SPLIT_1_OFFSET:
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.. rst-class:: classref-enumeration-constant
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:ref:`Param<enum_Light_Param>` **PARAM_SHADOW_SPLIT_1_OFFSET** = ``10``
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Constant for accessing :ref:`DirectionalLight.directional_shadow_split_1<class_DirectionalLight_property_directional_shadow_split_1>`.
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.. _class_Light_constant_PARAM_SHADOW_SPLIT_2_OFFSET:
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.. rst-class:: classref-enumeration-constant
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:ref:`Param<enum_Light_Param>` **PARAM_SHADOW_SPLIT_2_OFFSET** = ``11``
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Constant for accessing :ref:`DirectionalLight.directional_shadow_split_2<class_DirectionalLight_property_directional_shadow_split_2>`.
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.. _class_Light_constant_PARAM_SHADOW_SPLIT_3_OFFSET:
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.. rst-class:: classref-enumeration-constant
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:ref:`Param<enum_Light_Param>` **PARAM_SHADOW_SPLIT_3_OFFSET** = ``12``
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Constant for accessing :ref:`DirectionalLight.directional_shadow_split_3<class_DirectionalLight_property_directional_shadow_split_3>`.
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.. _class_Light_constant_PARAM_SHADOW_NORMAL_BIAS:
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.. rst-class:: classref-enumeration-constant
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:ref:`Param<enum_Light_Param>` **PARAM_SHADOW_NORMAL_BIAS** = ``13``
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Constant for accessing :ref:`DirectionalLight.directional_shadow_normal_bias<class_DirectionalLight_property_directional_shadow_normal_bias>`.
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.. _class_Light_constant_PARAM_SHADOW_BIAS:
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.. rst-class:: classref-enumeration-constant
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:ref:`Param<enum_Light_Param>` **PARAM_SHADOW_BIAS** = ``14``
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Constant for accessing :ref:`shadow_bias<class_Light_property_shadow_bias>`.
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.. _class_Light_constant_PARAM_SHADOW_BIAS_SPLIT_SCALE:
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.. rst-class:: classref-enumeration-constant
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:ref:`Param<enum_Light_Param>` **PARAM_SHADOW_BIAS_SPLIT_SCALE** = ``15``
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Constant for accessing :ref:`DirectionalLight.directional_shadow_bias_split_scale<class_DirectionalLight_property_directional_shadow_bias_split_scale>`.
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.. _class_Light_constant_PARAM_SHADOW_FADE_START:
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.. rst-class:: classref-enumeration-constant
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:ref:`Param<enum_Light_Param>` **PARAM_SHADOW_FADE_START** = ``16``
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Constant for accessing :ref:`DirectionalLight.directional_shadow_fade_start<class_DirectionalLight_property_directional_shadow_fade_start>`.
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.. _class_Light_constant_PARAM_MAX:
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.. rst-class:: classref-enumeration-constant
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:ref:`Param<enum_Light_Param>` **PARAM_MAX** = ``17``
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Represents the size of the :ref:`Param<enum_Light_Param>` enum.
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.. rst-class:: classref-item-separator
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----
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.. _enum_Light_BakeMode:
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.. rst-class:: classref-enumeration
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enum **BakeMode**:
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.. _class_Light_constant_BAKE_DISABLED:
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.. rst-class:: classref-enumeration-constant
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:ref:`BakeMode<enum_Light_BakeMode>` **BAKE_DISABLED** = ``0``
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Light is ignored when baking.
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\ **Note:** Hiding a light does *not* affect baking.
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.. _class_Light_constant_BAKE_INDIRECT:
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.. rst-class:: classref-enumeration-constant
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:ref:`BakeMode<enum_Light_BakeMode>` **BAKE_INDIRECT** = ``1``
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Only indirect lighting will be baked (default).
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.. _class_Light_constant_BAKE_ALL:
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.. rst-class:: classref-enumeration-constant
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:ref:`BakeMode<enum_Light_BakeMode>` **BAKE_ALL** = ``2``
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Both direct and indirect light will be baked.
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\ **Note:** You should hide the light if you don't want it to appear twice (dynamic and baked).
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.. rst-class:: classref-section-separator
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----
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.. rst-class:: classref-descriptions-group
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Property Descriptions
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---------------------
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.. _class_Light_property_editor_only:
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.. rst-class:: classref-property
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:ref:`bool<class_bool>` **editor_only** = ``false``
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.. rst-class:: classref-property-setget
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- void **set_editor_only** **(** :ref:`bool<class_bool>` value **)**
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- :ref:`bool<class_bool>` **is_editor_only** **(** **)**
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If ``true``, the light only appears in the editor and will not be visible at runtime.
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.. rst-class:: classref-item-separator
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----
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.. _class_Light_property_light_bake_mode:
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.. rst-class:: classref-property
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:ref:`BakeMode<enum_Light_BakeMode>` **light_bake_mode** = ``1``
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.. rst-class:: classref-property-setget
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- void **set_bake_mode** **(** :ref:`BakeMode<enum_Light_BakeMode>` value **)**
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- :ref:`BakeMode<enum_Light_BakeMode>` **get_bake_mode** **(** **)**
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The light's bake mode. See :ref:`BakeMode<enum_Light_BakeMode>`.
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.. rst-class:: classref-item-separator
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----
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.. _class_Light_property_light_color:
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.. rst-class:: classref-property
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:ref:`Color<class_Color>` **light_color** = ``Color( 1, 1, 1, 1 )``
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.. rst-class:: classref-property-setget
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- void **set_color** **(** :ref:`Color<class_Color>` value **)**
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- :ref:`Color<class_Color>` **get_color** **(** **)**
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The light's color. An *overbright* color can be used to achieve a result equivalent to increasing the light's :ref:`light_energy<class_Light_property_light_energy>`.
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.. rst-class:: classref-item-separator
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----
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.. _class_Light_property_light_cull_mask:
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.. rst-class:: classref-property
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:ref:`int<class_int>` **light_cull_mask** = ``4294967295``
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.. rst-class:: classref-property-setget
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- void **set_cull_mask** **(** :ref:`int<class_int>` value **)**
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- :ref:`int<class_int>` **get_cull_mask** **(** **)**
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The light will affect objects in the selected layers.
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.. rst-class:: classref-item-separator
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----
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.. _class_Light_property_light_energy:
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.. rst-class:: classref-property
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:ref:`float<class_float>` **light_energy** = ``1.0``
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.. rst-class:: classref-property-setget
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- void **set_param** **(** :ref:`Param<enum_Light_Param>` param, :ref:`float<class_float>` value **)**
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- :ref:`float<class_float>` **get_param** **(** :ref:`Param<enum_Light_Param>` param **)** |const|
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The light's strength multiplier (this is not a physical unit). For :ref:`OmniLight<class_OmniLight>` and :ref:`SpotLight<class_SpotLight>`, changing this value will only change the light color's intensity, not the light's radius.
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.. rst-class:: classref-item-separator
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----
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.. _class_Light_property_light_indirect_energy:
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.. rst-class:: classref-property
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:ref:`float<class_float>` **light_indirect_energy** = ``1.0``
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.. rst-class:: classref-property-setget
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- void **set_param** **(** :ref:`Param<enum_Light_Param>` param, :ref:`float<class_float>` value **)**
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- :ref:`float<class_float>` **get_param** **(** :ref:`Param<enum_Light_Param>` param **)** |const|
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Secondary multiplier used with indirect light (light bounces). This works on both :ref:`BakedLightmap<class_BakedLightmap>` and :ref:`GIProbe<class_GIProbe>`.
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.. rst-class:: classref-item-separator
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----
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.. _class_Light_property_light_negative:
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.. rst-class:: classref-property
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:ref:`bool<class_bool>` **light_negative** = ``false``
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.. rst-class:: classref-property-setget
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- void **set_negative** **(** :ref:`bool<class_bool>` value **)**
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- :ref:`bool<class_bool>` **is_negative** **(** **)**
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If ``true``, the light's effect is reversed, darkening areas and casting bright shadows.
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.. rst-class:: classref-item-separator
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----
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.. _class_Light_property_light_size:
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.. rst-class:: classref-property
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:ref:`float<class_float>` **light_size** = ``0.0``
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.. rst-class:: classref-property-setget
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- void **set_param** **(** :ref:`Param<enum_Light_Param>` param, :ref:`float<class_float>` value **)**
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- :ref:`float<class_float>` **get_param** **(** :ref:`Param<enum_Light_Param>` param **)** |const|
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The size of the light in Godot units. Only considered in baked lightmaps and only if :ref:`light_bake_mode<class_Light_property_light_bake_mode>` is set to :ref:`BAKE_ALL<class_Light_constant_BAKE_ALL>`. Increasing this value will make the shadows appear blurrier. This can be used to simulate area lights to an extent.
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\ **Note:** :ref:`light_size<class_Light_property_light_size>` is not affected by :ref:`Spatial.scale<class_Spatial_property_scale>` (the light's scale or its parent's scale).
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.. rst-class:: classref-item-separator
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----
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.. _class_Light_property_light_specular:
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.. rst-class:: classref-property
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:ref:`float<class_float>` **light_specular** = ``0.5``
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.. rst-class:: classref-property-setget
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- void **set_param** **(** :ref:`Param<enum_Light_Param>` param, :ref:`float<class_float>` value **)**
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- :ref:`float<class_float>` **get_param** **(** :ref:`Param<enum_Light_Param>` param **)** |const|
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The intensity of the specular blob in objects affected by the light. At ``0``, the light becomes a pure diffuse light. When not baking emission, this can be used to avoid unrealistic reflections when placing lights above an emissive surface.
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.. rst-class:: classref-item-separator
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----
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.. _class_Light_property_shadow_bias:
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.. rst-class:: classref-property
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:ref:`float<class_float>` **shadow_bias** = ``0.15``
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.. rst-class:: classref-property-setget
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- void **set_param** **(** :ref:`Param<enum_Light_Param>` param, :ref:`float<class_float>` value **)**
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- :ref:`float<class_float>` **get_param** **(** :ref:`Param<enum_Light_Param>` param **)** |const|
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Used to adjust shadow appearance. Too small a value results in self-shadowing ("shadow acne"), while too large a value causes shadows to separate from casters ("peter-panning"). Adjust as needed.
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.. rst-class:: classref-item-separator
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----
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.. _class_Light_property_shadow_color:
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.. rst-class:: classref-property
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:ref:`Color<class_Color>` **shadow_color** = ``Color( 0, 0, 0, 1 )``
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.. rst-class:: classref-property-setget
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- void **set_shadow_color** **(** :ref:`Color<class_Color>` value **)**
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- :ref:`Color<class_Color>` **get_shadow_color** **(** **)**
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The color of shadows cast by this light.
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.. rst-class:: classref-item-separator
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----
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.. _class_Light_property_shadow_contact:
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.. rst-class:: classref-property
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:ref:`float<class_float>` **shadow_contact** = ``0.0``
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.. rst-class:: classref-property-setget
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- void **set_param** **(** :ref:`Param<enum_Light_Param>` param, :ref:`float<class_float>` value **)**
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- :ref:`float<class_float>` **get_param** **(** :ref:`Param<enum_Light_Param>` param **)** |const|
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Attempts to reduce :ref:`shadow_bias<class_Light_property_shadow_bias>` gap by rendering screen-space contact shadows. This has a performance impact, especially at higher values.
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\ **Note:** Contact shadows can look broken, so leaving this property to ``0.0`` is recommended.
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.. rst-class:: classref-item-separator
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----
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.. _class_Light_property_shadow_enabled:
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.. rst-class:: classref-property
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:ref:`bool<class_bool>` **shadow_enabled** = ``false``
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.. rst-class:: classref-property-setget
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- void **set_shadow** **(** :ref:`bool<class_bool>` value **)**
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- :ref:`bool<class_bool>` **has_shadow** **(** **)**
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If ``true``, the light will cast shadows.
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.. rst-class:: classref-item-separator
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----
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.. _class_Light_property_shadow_reverse_cull_face:
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.. rst-class:: classref-property
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:ref:`bool<class_bool>` **shadow_reverse_cull_face** = ``false``
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.. rst-class:: classref-property-setget
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- void **set_shadow_reverse_cull_face** **(** :ref:`bool<class_bool>` value **)**
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- :ref:`bool<class_bool>` **get_shadow_reverse_cull_face** **(** **)**
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If ``true``, reverses the backface culling of the mesh. This can be useful when you have a flat mesh that has a light behind it. If you need to cast a shadow on both sides of the mesh, set the mesh to use double-sided shadows with :ref:`GeometryInstance.SHADOW_CASTING_SETTING_DOUBLE_SIDED<class_GeometryInstance_constant_SHADOW_CASTING_SETTING_DOUBLE_SIDED>`.
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.. rst-class:: classref-section-separator
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----
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.. rst-class:: classref-descriptions-group
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Method Descriptions
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-------------------
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.. _class_Light_method_get_param:
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.. rst-class:: classref-method
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:ref:`float<class_float>` **get_param** **(** :ref:`Param<enum_Light_Param>` param **)** |const|
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Returns the value of the specified :ref:`Param<enum_Light_Param>` parameter.
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.. rst-class:: classref-item-separator
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----
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.. _class_Light_method_set_param:
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.. rst-class:: classref-method
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void **set_param** **(** :ref:`Param<enum_Light_Param>` param, :ref:`float<class_float>` value **)**
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Sets the value of the specified :ref:`Param<enum_Light_Param>` parameter.
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.. |virtual| replace:: :abbr:`virtual (This method should typically be overridden by the user to have any effect.)`
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.. |const| replace:: :abbr:`const (This method has no side effects. It doesn't modify any of the instance's member variables.)`
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.. |vararg| replace:: :abbr:`vararg (This method accepts any number of arguments after the ones described here.)`
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.. |static| replace:: :abbr:`static (This method doesn't need an instance to be called, so it can be called directly using the class name.)`
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