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.. DO NOT EDIT THIS FILE, but the Curve.xml source instead.
.. The source is found in doc/classes or modules/<name>/doc_classes.

.. _class_Curve:

Curve
=====

**Inherits:** :ref:`Resource<class_Resource>` **<** :ref:`Reference<class_Reference>` **<** :ref:`Object<class_Object>`

A mathematic curve.

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

A curve that can be saved and re-used for other objects. By default, it ranges between ``0`` and ``1`` on the Y axis and positions points relative to the ``0.5`` Y position.

Properties
----------

+---------------------------+--------------------------------------------------------------+---------+
| :ref:`int<class_int>`     | :ref:`bake_resolution<class_Curve_property_bake_resolution>` | ``100`` |
+---------------------------+--------------------------------------------------------------+---------+
| :ref:`float<class_float>` | :ref:`max_value<class_Curve_property_max_value>`             | ``1.0`` |
+---------------------------+--------------------------------------------------------------+---------+
| :ref:`float<class_float>` | :ref:`min_value<class_Curve_property_min_value>`             | ``0.0`` |
+---------------------------+--------------------------------------------------------------+---------+

Methods
-------

+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>`                      | :ref:`add_point<class_Curve_method_add_point>` **(** :ref:`Vector2<class_Vector2>` position, :ref:`float<class_float>` left_tangent=0, :ref:`float<class_float>` right_tangent=0, :ref:`TangentMode<enum_Curve_TangentMode>` left_mode=0, :ref:`TangentMode<enum_Curve_TangentMode>` right_mode=0 **)** |
+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                       | :ref:`bake<class_Curve_method_bake>` **(** **)**                                                                                                                                                                                                                                                        |
+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                       | :ref:`clean_dupes<class_Curve_method_clean_dupes>` **(** **)**                                                                                                                                                                                                                                          |
+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                       | :ref:`clear_points<class_Curve_method_clear_points>` **(** **)**                                                                                                                                                                                                                                        |
+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>`                      | :ref:`get_point_count<class_Curve_method_get_point_count>` **(** **)** |const|                                                                                                                                                                                                                          |
+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`TangentMode<enum_Curve_TangentMode>` | :ref:`get_point_left_mode<class_Curve_method_get_point_left_mode>` **(** :ref:`int<class_int>` index **)** |const|                                                                                                                                                                                      |
+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`float<class_float>`                  | :ref:`get_point_left_tangent<class_Curve_method_get_point_left_tangent>` **(** :ref:`int<class_int>` index **)** |const|                                                                                                                                                                                |
+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Vector2<class_Vector2>`              | :ref:`get_point_position<class_Curve_method_get_point_position>` **(** :ref:`int<class_int>` index **)** |const|                                                                                                                                                                                        |
+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`TangentMode<enum_Curve_TangentMode>` | :ref:`get_point_right_mode<class_Curve_method_get_point_right_mode>` **(** :ref:`int<class_int>` index **)** |const|                                                                                                                                                                                    |
+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`float<class_float>`                  | :ref:`get_point_right_tangent<class_Curve_method_get_point_right_tangent>` **(** :ref:`int<class_int>` index **)** |const|                                                                                                                                                                              |
+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`float<class_float>`                  | :ref:`interpolate<class_Curve_method_interpolate>` **(** :ref:`float<class_float>` offset **)** |const|                                                                                                                                                                                                 |
+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`float<class_float>`                  | :ref:`interpolate_baked<class_Curve_method_interpolate_baked>` **(** :ref:`float<class_float>` offset **)**                                                                                                                                                                                             |
+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                       | :ref:`remove_point<class_Curve_method_remove_point>` **(** :ref:`int<class_int>` index **)**                                                                                                                                                                                                            |
+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                       | :ref:`set_point_left_mode<class_Curve_method_set_point_left_mode>` **(** :ref:`int<class_int>` index, :ref:`TangentMode<enum_Curve_TangentMode>` mode **)**                                                                                                                                             |
+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                       | :ref:`set_point_left_tangent<class_Curve_method_set_point_left_tangent>` **(** :ref:`int<class_int>` index, :ref:`float<class_float>` tangent **)**                                                                                                                                                     |
+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>`                      | :ref:`set_point_offset<class_Curve_method_set_point_offset>` **(** :ref:`int<class_int>` index, :ref:`float<class_float>` offset **)**                                                                                                                                                                  |
+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                       | :ref:`set_point_right_mode<class_Curve_method_set_point_right_mode>` **(** :ref:`int<class_int>` index, :ref:`TangentMode<enum_Curve_TangentMode>` mode **)**                                                                                                                                           |
+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                       | :ref:`set_point_right_tangent<class_Curve_method_set_point_right_tangent>` **(** :ref:`int<class_int>` index, :ref:`float<class_float>` tangent **)**                                                                                                                                                   |
+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                       | :ref:`set_point_value<class_Curve_method_set_point_value>` **(** :ref:`int<class_int>` index, :ref:`float<class_float>` y **)**                                                                                                                                                                         |
+--------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

Signals
-------

.. _class_Curve_signal_range_changed:

- **range_changed** **(** **)**

Emitted when :ref:`max_value<class_Curve_property_max_value>` or :ref:`min_value<class_Curve_property_min_value>` is changed.

Enumerations
------------

.. _enum_Curve_TangentMode:

.. _class_Curve_constant_TANGENT_FREE:

.. _class_Curve_constant_TANGENT_LINEAR:

.. _class_Curve_constant_TANGENT_MODE_COUNT:

enum **TangentMode**:

- **TANGENT_FREE** = **0** --- The tangent on this side of the point is user-defined.

- **TANGENT_LINEAR** = **1** --- The curve calculates the tangent on this side of the point as the slope halfway towards the adjacent point.

- **TANGENT_MODE_COUNT** = **2** --- The total number of available tangent modes.

Property Descriptions
---------------------

.. _class_Curve_property_bake_resolution:

- :ref:`int<class_int>` **bake_resolution**

+-----------+----------------------------+
| *Default* | ``100``                    |
+-----------+----------------------------+
| *Setter*  | set_bake_resolution(value) |
+-----------+----------------------------+
| *Getter*  | get_bake_resolution()      |
+-----------+----------------------------+

The number of points to include in the baked (i.e. cached) curve data.

----

.. _class_Curve_property_max_value:

- :ref:`float<class_float>` **max_value**

+-----------+----------------------+
| *Default* | ``1.0``              |
+-----------+----------------------+
| *Setter*  | set_max_value(value) |
+-----------+----------------------+
| *Getter*  | get_max_value()      |
+-----------+----------------------+

The maximum value the curve can reach.

----

.. _class_Curve_property_min_value:

- :ref:`float<class_float>` **min_value**

+-----------+----------------------+
| *Default* | ``0.0``              |
+-----------+----------------------+
| *Setter*  | set_min_value(value) |
+-----------+----------------------+
| *Getter*  | get_min_value()      |
+-----------+----------------------+

The minimum value the curve can reach.

Method Descriptions
-------------------

.. _class_Curve_method_add_point:

- :ref:`int<class_int>` **add_point** **(** :ref:`Vector2<class_Vector2>` position, :ref:`float<class_float>` left_tangent=0, :ref:`float<class_float>` right_tangent=0, :ref:`TangentMode<enum_Curve_TangentMode>` left_mode=0, :ref:`TangentMode<enum_Curve_TangentMode>` right_mode=0 **)**

Adds a point to the curve. For each side, if the ``*_mode`` is :ref:`TANGENT_LINEAR<class_Curve_constant_TANGENT_LINEAR>`, the ``*_tangent`` angle (in degrees) uses the slope of the curve halfway to the adjacent point. Allows custom assignments to the ``*_tangent`` angle if ``*_mode`` is set to :ref:`TANGENT_FREE<class_Curve_constant_TANGENT_FREE>`.

----

.. _class_Curve_method_bake:

- void **bake** **(** **)**

Recomputes the baked cache of points for the curve.

----

.. _class_Curve_method_clean_dupes:

- void **clean_dupes** **(** **)**

Removes points that are closer than ``CMP_EPSILON`` (0.00001) units to their neighbor on the curve.

----

.. _class_Curve_method_clear_points:

- void **clear_points** **(** **)**

Removes all points from the curve.

----

.. _class_Curve_method_get_point_count:

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

Returns the number of points describing the curve.

----

.. _class_Curve_method_get_point_left_mode:

- :ref:`TangentMode<enum_Curve_TangentMode>` **get_point_left_mode** **(** :ref:`int<class_int>` index **)** |const|

Returns the left :ref:`TangentMode<enum_Curve_TangentMode>` for the point at ``index``.

----

.. _class_Curve_method_get_point_left_tangent:

- :ref:`float<class_float>` **get_point_left_tangent** **(** :ref:`int<class_int>` index **)** |const|

Returns the left tangent angle (in degrees) for the point at ``index``.

----

.. _class_Curve_method_get_point_position:

- :ref:`Vector2<class_Vector2>` **get_point_position** **(** :ref:`int<class_int>` index **)** |const|

Returns the curve coordinates for the point at ``index``.

----

.. _class_Curve_method_get_point_right_mode:

- :ref:`TangentMode<enum_Curve_TangentMode>` **get_point_right_mode** **(** :ref:`int<class_int>` index **)** |const|

Returns the right :ref:`TangentMode<enum_Curve_TangentMode>` for the point at ``index``.

----

.. _class_Curve_method_get_point_right_tangent:

- :ref:`float<class_float>` **get_point_right_tangent** **(** :ref:`int<class_int>` index **)** |const|

Returns the right tangent angle (in degrees) for the point at ``index``.

----

.. _class_Curve_method_interpolate:

- :ref:`float<class_float>` **interpolate** **(** :ref:`float<class_float>` offset **)** |const|

Returns the Y value for the point that would exist at the X position ``offset`` along the curve.

----

.. _class_Curve_method_interpolate_baked:

- :ref:`float<class_float>` **interpolate_baked** **(** :ref:`float<class_float>` offset **)**

Returns the Y value for the point that would exist at the X position ``offset`` along the curve using the baked cache. Bakes the curve's points if not already baked.

----

.. _class_Curve_method_remove_point:

- void **remove_point** **(** :ref:`int<class_int>` index **)**

Removes the point at ``index`` from the curve.

----

.. _class_Curve_method_set_point_left_mode:

- void **set_point_left_mode** **(** :ref:`int<class_int>` index, :ref:`TangentMode<enum_Curve_TangentMode>` mode **)**

Sets the left :ref:`TangentMode<enum_Curve_TangentMode>` for the point at ``index`` to ``mode``.

----

.. _class_Curve_method_set_point_left_tangent:

- void **set_point_left_tangent** **(** :ref:`int<class_int>` index, :ref:`float<class_float>` tangent **)**

Sets the left tangent angle for the point at ``index`` to ``tangent``.

----

.. _class_Curve_method_set_point_offset:

- :ref:`int<class_int>` **set_point_offset** **(** :ref:`int<class_int>` index, :ref:`float<class_float>` offset **)**

Sets the offset from ``0.5``.

----

.. _class_Curve_method_set_point_right_mode:

- void **set_point_right_mode** **(** :ref:`int<class_int>` index, :ref:`TangentMode<enum_Curve_TangentMode>` mode **)**

Sets the right :ref:`TangentMode<enum_Curve_TangentMode>` for the point at ``index`` to ``mode``.

----

.. _class_Curve_method_set_point_right_tangent:

- void **set_point_right_tangent** **(** :ref:`int<class_int>` index, :ref:`float<class_float>` tangent **)**

Sets the right tangent angle for the point at ``index`` to ``tangent``.

----

.. _class_Curve_method_set_point_value:

- void **set_point_value** **(** :ref:`int<class_int>` index, :ref:`float<class_float>` y **)**

Assigns the vertical position ``y`` to the point at ``index``.

.. |virtual| replace:: :abbr:`virtual (This method should typically be overridden by the user to have any effect.)`
.. |const| replace:: :abbr:`const (This method has no side effects. It doesn't modify any of the instance's member variables.)`
.. |vararg| replace:: :abbr:`vararg (This method accepts any number of arguments after the ones described here.)`