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91 lines
5.2 KiB
ReStructuredText
91 lines
5.2 KiB
ReStructuredText
:github_url: hide
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.. _class_Cubemap:
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Cubemap
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=======
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**Hereda:** :ref:`ImageTextureLayered<class_ImageTextureLayered>` **<** :ref:`TextureLayered<class_TextureLayered>` **<** :ref:`Texture<class_Texture>` **<** :ref:`Resource<class_Resource>` **<** :ref:`RefCounted<class_RefCounted>` **<** :ref:`Object<class_Object>`
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Six square textures representing the faces of a cube. Commonly used as a skybox.
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.. rst-class:: classref-introduction-group
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Descripción
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----------------------
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A cubemap is made of 6 textures organized in layers. They are typically used for faking reflections in 3D rendering (see :ref:`ReflectionProbe<class_ReflectionProbe>`). It can be used to make an object look as if it's reflecting its surroundings. This usually delivers much better performance than other reflection methods.
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This resource is typically used as a uniform in custom shaders. Few core Godot methods make use of **Cubemap** resources.
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To create such a texture file yourself, reimport your image files using the Godot Editor import presets. To create a Cubemap from code, use :ref:`ImageTextureLayered.create_from_images()<class_ImageTextureLayered_method_create_from_images>` on an instance of the Cubemap class.
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The expected image order is X+, X-, Y+, Y-, Z+, Z- (in Godot's coordinate system, so Y+ is "up" and Z- is "forward"). You can use one of the following templates as a base:
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- `2×3 cubemap template (default layout option) <https://raw.githubusercontent.com/godotengine/godot-docs/master/tutorials/assets_pipeline/img/cubemap_template_2x3.webp>`__\
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- `3×2 cubemap template <https://raw.githubusercontent.com/godotengine/godot-docs/master/tutorials/assets_pipeline/img/cubemap_template_3x2.webp>`__\
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- `1×6 cubemap template <https://raw.githubusercontent.com/godotengine/godot-docs/master/tutorials/assets_pipeline/img/cubemap_template_1x6.webp>`__\
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- `6×1 cubemap template <https://raw.githubusercontent.com/godotengine/godot-docs/master/tutorials/assets_pipeline/img/cubemap_template_6x1.webp>`__\
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\ **Note:** Godot doesn't support using cubemaps in a :ref:`PanoramaSkyMaterial<class_PanoramaSkyMaterial>`. To use a cubemap as a skybox, convert the default :ref:`PanoramaSkyMaterial<class_PanoramaSkyMaterial>` to a :ref:`ShaderMaterial<class_ShaderMaterial>` using the **Convert to ShaderMaterial** resource dropdown option, then replace its code with the following:
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.. code:: text
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shader_type sky;
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uniform samplerCube source_panorama : filter_linear, source_color, hint_default_black;
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uniform float exposure : hint_range(0, 128) = 1.0;
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void sky() {
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// If importing a cubemap from another engine, you may need to flip one of the `EYEDIR` components below
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// by replacing it with `-EYEDIR`.
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vec3 eyedir = vec3(EYEDIR.x, EYEDIR.y, EYEDIR.z);
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COLOR = texture(source_panorama, eyedir).rgb * exposure;
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}
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After replacing the shader code and saving, specify the imported Cubemap resource in the Shader Parameters section of the ShaderMaterial in the inspector.
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Alternatively, you can use `this tool <https://danilw.github.io/GLSL-howto/cubemap_to_panorama_js/cubemap_to_panorama.html>`__ to convert a cubemap to an equirectangular sky map and use :ref:`PanoramaSkyMaterial<class_PanoramaSkyMaterial>` as usual.
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.. rst-class:: classref-reftable-group
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Métodos
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--------------
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.. table::
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:widths: auto
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+---------------------------------+----------------------------------------------------------------------------------+
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| :ref:`Resource<class_Resource>` | :ref:`create_placeholder<class_Cubemap_method_create_placeholder>`\ (\ ) |const| |
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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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Descripciones de Métodos
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------------------------------------------------
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.. _class_Cubemap_method_create_placeholder:
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.. rst-class:: classref-method
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:ref:`Resource<class_Resource>` **create_placeholder**\ (\ ) |const| :ref:`🔗<class_Cubemap_method_create_placeholder>`
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Creates a placeholder version of this resource (:ref:`PlaceholderCubemap<class_PlaceholderCubemap>`).
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.. |virtual| replace:: :abbr:`virtual (Normalmente, este método debería ser sobreescrito por el usuario para que tenga algún efecto.)`
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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 (Este método no tiene efectos secundarios. No modifica ninguna de las variables miembro de la instancia.)`
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.. |vararg| replace:: :abbr:`vararg (Este método permite agregar cualquier número de argumentos después de los descritos aquí.)`
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.. |constructor| replace:: :abbr:`constructor (Este método se utiliza para construir un tipo.)`
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.. |static| replace:: :abbr:`static (Este método no necesita una instancia para ser llamado, por lo que puede llamarse directamente utilizando el nombre de la clase.)`
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.. |operator| replace:: :abbr:`operator (Este método describe un operador válido para usar con este tipo como operando izquierdo.)`
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.. |bitfield| replace:: :abbr:`BitField (Este valor es un entero compuesto como una máscara de bits de las siguientes banderas.)`
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.. |void| replace:: :abbr:`void (Sin valor de retorno.)`
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