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83 lines
3.4 KiB
ReStructuredText
83 lines
3.4 KiB
ReStructuredText
:github_url: hide
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.. _class_RDPipelineSpecializationConstant:
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RDPipelineSpecializationConstant
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================================
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**繼承：** :ref:`RefCounted<class_RefCounted>` **<** :ref:`Object<class_Object>`
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管線特化常數（由 :ref:`RenderingDevice<class_RenderingDevice>` 使用）。
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.. rst-class:: classref-introduction-group
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說明
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----
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*特化常數*\ 可以建立同一著色器的額外版本，但不會導致實際編譯的著色器版本數增加。這樣就能減少著色器的版本數、減少 ``if`` 分支，從而提升性能，但與此同時保持著色器能夠在不同場合靈活運用。
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這個物件由 :ref:`RenderingDevice<class_RenderingDevice>` 使用。
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.. rst-class:: classref-reftable-group
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屬性
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----
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.. table::
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:widths: auto
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+-------------------------------+---------------------------------------------------------------------------------+-------+
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| :ref:`int<class_int>` | :ref:`constant_id<class_RDPipelineSpecializationConstant_property_constant_id>` | ``0`` |
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+-------------------------------+---------------------------------------------------------------------------------+-------+
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| :ref:`Variant<class_Variant>` | :ref:`value<class_RDPipelineSpecializationConstant_property_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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屬性說明
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--------
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.. _class_RDPipelineSpecializationConstant_property_constant_id:
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.. rst-class:: classref-property
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:ref:`int<class_int>` **constant_id** = ``0`` :ref:`🔗<class_RDPipelineSpecializationConstant_property_constant_id>`
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.. rst-class:: classref-property-setget
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- |void| **set_constant_id**\ (\ value\: :ref:`int<class_int>`\ )
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- :ref:`int<class_int>` **get_constant_id**\ (\ )
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特化常數的識別字。這個值從 ``0`` 開始，給定著色器中每一個不同的特化常數都會將其遞增。
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.. rst-class:: classref-item-separator
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----
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.. _class_RDPipelineSpecializationConstant_property_value:
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.. rst-class:: classref-property
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:ref:`Variant<class_Variant>` **value** :ref:`🔗<class_RDPipelineSpecializationConstant_property_value>`
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.. rst-class:: classref-property-setget
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- |void| **set_value**\ (\ value\: :ref:`Variant<class_Variant>`\ )
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- :ref:`Variant<class_Variant>` **get_value**\ (\ )
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特化常數的值。只有 :ref:`bool<class_bool>`\ 、\ :ref:`int<class_int>`\ 、\ :ref:`float<class_float>` 型別是有效的特化常數。
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.. |virtual| replace:: :abbr:`virtual (本方法通常需要使用者覆寫才能生效。)`
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.. |required| replace:: :abbr:`required (This method is required to be overridden when extending its base class.)`
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.. |const| replace:: :abbr:`const (本方法沒有副作用。不會修改該實例的任何成員變數。)`
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.. |vararg| replace:: :abbr:`vararg (本方法除了這裡描述的參數外，還可以接受任意數量的參數。)`
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.. |constructor| replace:: :abbr:`constructor (本方法用於建構一個型別。)`
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.. |static| replace:: :abbr:`static (本方法無需實例即可呼叫，因此可以直接使用類別名稱呼叫。)`
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.. |operator| replace:: :abbr:`operator (本方法描述將本型別作為左運算元時可用的有效運算子。)`
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.. |bitfield| replace:: :abbr:`BitField (此值是由下列旗標組成的位元遮罩整數。)`
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.. |void| replace:: :abbr:`void (無回傳值。)`
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