godot-docs/classes/class_mesh.rst

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.. _class_Mesh:

Mesh
====

**Inherits:** :ref:`Resource<class_resource>` **<** :ref:`Reference<class_reference>` **<** :ref:`Object<class_object>`

**Category:** Core

Brief Description
-----------------

A :ref:`Resource<class_resource>` that contains vertex-array based geometry.

Member Functions
----------------

+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                             | :ref:`add_morph_target<class_Mesh_add_morph_target>`  **(** :ref:`String<class_string>` name  **)**                                                                                                                 |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>`            | :ref:`get_morph_target_count<class_Mesh_get_morph_target_count>`  **(** **)** const                                                                                                                                 |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`String<class_string>`      | :ref:`get_morph_target_name<class_Mesh_get_morph_target_name>`  **(** :ref:`int<class_int>` index  **)** const                                                                                                      |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                             | :ref:`clear_morph_targets<class_Mesh_clear_morph_targets>`  **(** **)**                                                                                                                                             |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                             | :ref:`set_morph_target_mode<class_Mesh_set_morph_target_mode>`  **(** :ref:`int<class_int>` mode  **)**                                                                                                             |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>`            | :ref:`get_morph_target_mode<class_Mesh_get_morph_target_mode>`  **(** **)** const                                                                                                                                   |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                             | :ref:`add_surface<class_Mesh_add_surface>`  **(** :ref:`int<class_int>` primitive, :ref:`Array<class_array>` arrays, :ref:`Array<class_array>` morph_arrays=Array(), :ref:`bool<class_bool>` alphasort=false  **)** |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>`            | :ref:`get_surface_count<class_Mesh_get_surface_count>`  **(** **)** const                                                                                                                                           |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                             | :ref:`surface_remove<class_Mesh_surface_remove>`  **(** :ref:`int<class_int>` surf_idx  **)**                                                                                                                       |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>`            | :ref:`surface_get_array_len<class_Mesh_surface_get_array_len>`  **(** :ref:`int<class_int>` surf_idx  **)** const                                                                                                   |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>`            | :ref:`surface_get_array_index_len<class_Mesh_surface_get_array_index_len>`  **(** :ref:`int<class_int>` surf_idx  **)** const                                                                                       |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>`            | :ref:`surface_get_format<class_Mesh_surface_get_format>`  **(** :ref:`int<class_int>` surf_idx  **)** const                                                                                                         |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>`            | :ref:`surface_get_primitive_type<class_Mesh_surface_get_primitive_type>`  **(** :ref:`int<class_int>` surf_idx  **)** const                                                                                         |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                             | :ref:`surface_set_material<class_Mesh_surface_set_material>`  **(** :ref:`int<class_int>` surf_idx, :ref:`Material<class_material>` material  **)**                                                                 |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Material<class_material>`  | :ref:`surface_get_material<class_Mesh_surface_get_material>`  **(** :ref:`int<class_int>` surf_idx  **)** const                                                                                                     |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                             | :ref:`surface_set_name<class_Mesh_surface_set_name>`  **(** :ref:`int<class_int>` surf_idx, :ref:`String<class_string>` name  **)**                                                                                 |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`String<class_string>`      | :ref:`surface_get_name<class_Mesh_surface_get_name>`  **(** :ref:`int<class_int>` surf_idx  **)** const                                                                                                             |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                             | :ref:`center_geometry<class_Mesh_center_geometry>`  **(** **)**                                                                                                                                                     |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                             | :ref:`regen_normalmaps<class_Mesh_regen_normalmaps>`  **(** **)**                                                                                                                                                   |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                             | :ref:`set_custom_aabb<class_Mesh_set_custom_aabb>`  **(** :ref:`AABB<class_aabb>` aabb  **)**                                                                                                                       |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`AABB<class_aabb>`          | :ref:`get_custom_aabb<class_Mesh_get_custom_aabb>`  **(** **)** const                                                                                                                                               |
+----------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

Numeric Constants
-----------------

- **NO_INDEX_ARRAY** = **-1** --- Default value used for index_array_len when no indices are present.
- **ARRAY_WEIGHTS_SIZE** = **4** --- Amount of weights/bone indices per vertex (always 4).
- **ARRAY_VERTEX** = **0** --- Vertex array (array of :ref:`Vector3<class_vector3>` vertices).
- **ARRAY_NORMAL** = **1** --- Normal array (array of :ref:`Vector3<class_vector3>` normals).
- **ARRAY_TANGENT** = **2** --- Tangent array, array of groups of 4 floats. first 3 floats determine the tangent, and the last the binormal direction as -1 or 1.
- **ARRAY_COLOR** = **3** --- Vertex array (array of :ref:`Color<class_color>` colors).
- **ARRAY_TEX_UV** = **4** --- UV array (array of :ref:`Vector3<class_vector3>` UVs or float array of groups of 2 floats (u,v)).
- **ARRAY_TEX_UV2** = **5** --- Second UV array (array of :ref:`Vector3<class_vector3>` UVs or float array of groups of 2 floats (u,v)).
- **ARRAY_BONES** = **6** --- Array of bone indices, as a float array. Each element in groups of 4 floats.
- **ARRAY_WEIGHTS** = **7** --- Array of bone weights, as a float array. Each element in groups of 4 floats.
- **ARRAY_INDEX** = **8** --- Array of integers, used as indices referencing vertices. No index can be beyond the vertex array size.
- **ARRAY_FORMAT_VERTEX** = **1** --- Array format will include vertices (mandatory).
- **ARRAY_FORMAT_NORMAL** = **2** --- Array format will include normals
- **ARRAY_FORMAT_TANGENT** = **4** --- Array format will include tangents
- **ARRAY_FORMAT_COLOR** = **8** --- Array format will include a color array.
- **ARRAY_FORMAT_TEX_UV** = **16** --- Array format will include UVs.
- **ARRAY_FORMAT_TEX_UV2** = **32** --- Array format will include another set of UVs.
- **ARRAY_FORMAT_BONES** = **64** --- Array format will include bone indices.
- **ARRAY_FORMAT_WEIGHTS** = **128** --- Array format will include bone weights.
- **ARRAY_FORMAT_INDEX** = **256** --- Index array will be used.
- **PRIMITIVE_POINTS** = **0** --- Render array as points (one vertex equals one point).
- **PRIMITIVE_LINES** = **1** --- Render array as lines (every two vertices a line is created).
- **PRIMITIVE_LINE_STRIP** = **2** --- Render array as line strip.
- **PRIMITIVE_LINE_LOOP** = **3** --- Render array as line loop (like line strip, but closed).
- **PRIMITIVE_TRIANGLES** = **4** --- Render array as triangles (every three vertices a triangle is created).
- **PRIMITIVE_TRIANGLE_STRIP** = **5** --- Render array as triangle strips.
- **PRIMITIVE_TRIANGLE_FAN** = **6** --- Render array as triangle fans.

Description
-----------

Mesh is a type of :ref:`Resource<class_resource>` that contains vertex-array based geometry, divided in *surfaces*. Each surface contains a completely separate array and a material used to draw it. Design wise, a mesh with multiple surfaces is preferred to a single surface, because objects created in 3D editing software commonly contain multiple materials.

Member Function Description
---------------------------

.. _class_Mesh_add_morph_target:

- void  **add_morph_target**  **(** :ref:`String<class_string>` name  **)**

.. _class_Mesh_get_morph_target_count:

- :ref:`int<class_int>`  **get_morph_target_count**  **(** **)** const

.. _class_Mesh_get_morph_target_name:

- :ref:`String<class_string>`  **get_morph_target_name**  **(** :ref:`int<class_int>` index  **)** const

.. _class_Mesh_clear_morph_targets:

- void  **clear_morph_targets**  **(** **)**

.. _class_Mesh_set_morph_target_mode:

- void  **set_morph_target_mode**  **(** :ref:`int<class_int>` mode  **)**

.. _class_Mesh_get_morph_target_mode:

- :ref:`int<class_int>`  **get_morph_target_mode**  **(** **)** const

.. _class_Mesh_add_surface:

- void  **add_surface**  **(** :ref:`int<class_int>` primitive, :ref:`Array<class_array>` arrays, :ref:`Array<class_array>` morph_arrays=Array(), :ref:`bool<class_bool>` alphasort=false  **)**

Create a new surface (:ref:`get_surface_count<class_Mesh_get_surface_count>` that will become surf_idx for this.

Surfaces are created to be rendered using a "primitive", which may be PRIMITIVE_POINTS, PRIMITIVE_LINES, PRIMITIVE_LINE_STRIP, PRIMITIVE_LINE_LOOP, PRIMITIVE_TRIANGLES, PRIMITIVE_TRIANGLE_STRIP, PRIMITIVE_TRIANGLE_FAN. (As a note, when using indices, it is recommended to only use just points, lines or triangles).

The format of a surface determines which arrays it will allocate and hold, so "format" is a combination of ARRAY_FORMAT\_\* mask constants ORed together. ARRAY_FORMAT_VERTEX must be always present. "array_len" determines the amount of vertices in the array (not primitives!). if ARRAY_FORMAT_INDEX is in the format mask, then it means that an index array will be allocated and "index_array_len" must be passed.

.. _class_Mesh_get_surface_count:

- :ref:`int<class_int>`  **get_surface_count**  **(** **)** const

Return the amount of surfaces that the :ref:`Mesh<class_mesh>` holds.

.. _class_Mesh_surface_remove:

- void  **surface_remove**  **(** :ref:`int<class_int>` surf_idx  **)**

Remove a surface at position surf_idx, shifting greater surfaces one surf_idx slot down.

.. _class_Mesh_surface_get_array_len:

- :ref:`int<class_int>`  **surface_get_array_len**  **(** :ref:`int<class_int>` surf_idx  **)** const

Return the length in vertices of the vertex array in the requested surface (see :ref:`add_surface<class_Mesh_add_surface>`).

.. _class_Mesh_surface_get_array_index_len:

- :ref:`int<class_int>`  **surface_get_array_index_len**  **(** :ref:`int<class_int>` surf_idx  **)** const

Return the length in indices of the index array in the requested surface (see :ref:`add_surface<class_Mesh_add_surface>`).

.. _class_Mesh_surface_get_format:

- :ref:`int<class_int>`  **surface_get_format**  **(** :ref:`int<class_int>` surf_idx  **)** const

Return the format mask of the requested surface (see :ref:`add_surface<class_Mesh_add_surface>`).

.. _class_Mesh_surface_get_primitive_type:

- :ref:`int<class_int>`  **surface_get_primitive_type**  **(** :ref:`int<class_int>` surf_idx  **)** const

Return the primitive type of the requested surface (see :ref:`add_surface<class_Mesh_add_surface>`).

.. _class_Mesh_surface_set_material:

- void  **surface_set_material**  **(** :ref:`int<class_int>` surf_idx, :ref:`Material<class_material>` material  **)**

Set a :ref:`Material<class_material>` for a given surface. Surface will be rendered using this material.

.. _class_Mesh_surface_get_material:

- :ref:`Material<class_material>`  **surface_get_material**  **(** :ref:`int<class_int>` surf_idx  **)** const

Return a :ref:`Material<class_material>` in a given surface. Surface is rendered using this material.

.. _class_Mesh_surface_set_name:

- void  **surface_set_name**  **(** :ref:`int<class_int>` surf_idx, :ref:`String<class_string>` name  **)**

.. _class_Mesh_surface_get_name:

- :ref:`String<class_string>`  **surface_get_name**  **(** :ref:`int<class_int>` surf_idx  **)** const

.. _class_Mesh_center_geometry:

- void  **center_geometry**  **(** **)**

.. _class_Mesh_regen_normalmaps:

- void  **regen_normalmaps**  **(** **)**

.. _class_Mesh_set_custom_aabb:

- void  **set_custom_aabb**  **(** :ref:`AABB<class_aabb>` aabb  **)**

.. _class_Mesh_get_custom_aabb:

- :ref:`AABB<class_aabb>`  **get_custom_aabb**  **(** **)** const