FCurve(bpy_struct)

base class — bpy_struct

class bpy.types.FCurve(bpy_struct)

F-Curve defining values of a period of time

array_index

Index to the specific property affected by F-Curve if applicable

Type

int in [0, inf], default 0

auto_smoothing

Algorithm used to compute automatic handles

  • NONE None, Automatic handles only take immediately adjacent keys into account.

  • CONT_ACCEL Continuous Acceleration, Automatic handles are adjusted to avoid jumps in acceleration, resulting in smoother curves. However, key changes may affect interpolation over a larger stretch of the curve.

Type

enum in [‘NONE’, ‘CONT_ACCEL’], default ‘NONE’

color

Color of the F-Curve in the Graph Editor

Type

float array of 3 items in [0, 1], default (0.0, 0.0, 0.0)

color_mode

Method used to determine color of F-Curve in Graph Editor

  • AUTO_RAINBOW Auto Rainbow, Cycle through the rainbow, trying to give each curve a unique color.

  • AUTO_RGB Auto XYZ to RGB, Use axis colors for transform and color properties, and auto-rainbow for the rest.

  • AUTO_YRGB Auto WXYZ to YRGB, Use axis colors for XYZ parts of transform, and yellow for the ‘W’ channel.

  • CUSTOM User Defined, Use custom hand-picked color for F-Curve.

Type

enum in [‘AUTO_RAINBOW’, ‘AUTO_RGB’, ‘AUTO_YRGB’, ‘CUSTOM’], default ‘AUTO_RAINBOW’

data_path

RNA Path to property affected by F-Curve

Type

string, default “”, (never None)

driver

Channel Driver (only set for Driver F-Curves)

Type

Driver, (readonly)

extrapolation

Method used for evaluating value of F-Curve outside first and last keyframes

  • CONSTANT Constant, Hold values of endpoint keyframes.

  • LINEAR Linear, Use slope of curve leading in/out of endpoint keyframes.

Type

enum in [‘CONSTANT’, ‘LINEAR’], default ‘CONSTANT’

group

Action Group that this F-Curve belongs to

Type

ActionGroup

hide

F-Curve and its keyframes are hidden in the Graph Editor graphs

Type

boolean, default False

is_empty

True if the curve contributes no animation due to lack of keyframes or useful modifiers, and should be deleted

Type

boolean, default False, (readonly)

is_valid

False when F-Curve could not be evaluated in past, so should be skipped when evaluating

Type

boolean, default False

keyframe_points

User-editable keyframes

Type

FCurveKeyframePoints bpy_prop_collection of Keyframe, (readonly)

lock

F-Curve’s settings cannot be edited

Type

boolean, default False

modifiers

Modifiers affecting the shape of the F-Curve

Type

FCurveModifiers bpy_prop_collection of FModifier, (readonly)

mute

Disable F-Curve Modifier evaluation

Type

boolean, default False

sampled_points

Sampled animation data

Type

bpy_prop_collection of FCurveSample, (readonly)

select

F-Curve is selected for editing

Type

boolean, default False

evaluate(frame)

Evaluate F-Curve

Parameters

frame (float in [-inf, inf]) – Frame, Evaluate F-Curve at given frame

Returns

Value, Value of F-Curve specific frame

Return type

float in [-inf, inf]

update()

Ensure keyframes are sorted in chronological order and handles are set correctly

range()

Get the time extents for F-Curve

Returns

Range, Min/Max values

Return type

float array of 2 items in [-inf, inf]

update_autoflags(data)

Update FCurve flags set automatically from affected property (currently, integer/discrete flags set when the property is not a float)

Parameters

data (AnyType, (never None)) – Data, Data containing the property controlled by given FCurve

convert_to_samples(start, end)

Convert current FCurve from keyframes to sample points, if necessary

Parameters
  • start (int in [-1048574, 1048574]) – Start Frame

  • end (int in [-1048574, 1048574]) – End Frame

convert_to_keyframes(start, end)

Convert current FCurve from sample points to keyframes (linear interpolation), if necessary

Parameters
  • start (int in [-1048574, 1048574]) – Start Frame

  • end (int in [-1048574, 1048574]) – End Frame

classmethod bl_rna_get_subclass(id, default=None)
Parameters

id (string) – The RNA type identifier.

Returns

The RNA type or default when not found.

Return type

bpy.types.Struct subclass

classmethod bl_rna_get_subclass_py(id, default=None)
Parameters

id (string) – The RNA type identifier.

Returns

The class or default when not found.

Return type

type

Inherited Properties

Inherited Functions

References