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 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

bpy_struct.id_data

Inherited Functions

References