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 [-inf, inf], default 0

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

Type:enum in [‘AUTO_RAINBOW’, ‘AUTO_RGB’, ‘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_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

F-Curve is not evaluated

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 [-300000, 300000]) – Start Frame
• end (int in [-300000, 300000]) – End Frame

convert_to_keyframes(start, end)

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

Parameters:

• start (int in [-300000, 300000]) – Start Frame
• end (int in [-300000, 300000]) – End Frame

Inherited Properties

bpy_struct.id_data

Inherited Functions

bpy_struct.as_pointer bpy_struct.driver_add bpy_struct.driver_remove bpy_struct.get bpy_struct.is_property_hidden bpy_struct.is_property_set bpy_struct.items bpy_struct.keyframe_delete

bpy_struct.keyframe_insert bpy_struct.keys bpy_struct.path_from_id bpy_struct.path_resolve bpy_struct.property_unset bpy_struct.type_recast bpy_struct.values

References

Action.fcurves ActionFCurves.new ActionFCurves.remove ActionGroup.channels

AnimData.drivers AnimDataDrivers.from_existing AnimDataDrivers.from_existing NlaStrip.fcurves