## FCurve.RemoveKeys

### Introduced

v3.0

### Description

Removes all keys between StartFrame and EndFrame and returns the number of keys removed.
Note: If the fcurve is locked then the method raises an 'Access Denied' (E_ACCESSDENIED) error. Key locks can be overridden using the OverrideKeyLock argument.

### C# Syntax

    Int32 FCurve.RemoveKeys( Object in_StartFrame, Object in_EndFrame, Boolean in_OverrideKeyLock );

### Scripting Syntax

    oLong = FCurve.RemoveKeys( [StartFrame], [EndFrame], [OverrideKeyLock] );

### Return Value

Long

### Parameters

Parameter | Type | Description
--- | --- | ---
StartFrame | Variant | The time in frames at which to start removing keys. Default Value: The frame of the first key on the function curve.
EndFrame | Variant | The time in frames at which to end resampling. Default Value: The frame of the last key on the function curve
OverrideKeyLock | Boolean | Override the FCurveKey.Locked value to force keys to be removed. Default Value: false

### Examples

#### JScript Example

    /*
            This JScript example illustrates how to use the FCurve.RemoveKeys method
            to remove keys from the entire curve or from an interval on the fcurve.
    */
    // Create a null
    Application.NewScene( null, false );
    var nullobj = ActiveSceneRoot.AddNull();
    var empty;
    // Create a custom property set on the null
    var cpset = nullobj.AddCustomProperty( "CustomPSet" );
    var x = cpset.AddParameter( "X", siDouble, empty, siAnimatable, "X", "X", empty, 0.25, 0, 10 );
    var y = cpset.AddParameter( "Y", siInt4, empty, siAnimatable, "Y", "Y", empty, 5, 0, 100 );
    var z = cpset.AddParameter( "Z", siBool, empty, siAnimatable, "Z", "Z", empty, true );
    // Create some fcurves
    var fc1 = x.AddFCurve();
    var fc2 = y.AddFCurve();
    var fc3 = z.AddFCurve();
    // Add keys to the fcurves
    fc1.Resample();
    fc2.Resample();
    fc3.Resample();
    // Lock all the keys on fc3
    for ( i=0; i<fc3.GetNumKeys(); i++ )
    {
            key = fc3.GetKeyAtIndex(i);
            key.Locked = true;
    }
    var cKeys;
    // Remove all keys between frame 1 and 10 and override the key lock
    LogMessage( "keys in interval 1-10 : " +  fc3.GetNumKeys(1,10) );
    cKeys = fc3.RemoveKeys( 1, 10, true );
    LogMessage( "keys removed " + cKeys );
    // Remove all the keys from fc1
    LogMessage( "total num keys : " +  fc3.GetNumKeys() );
    cKeys = fc1.RemoveKeys();
    LogMessage( "keys removed " + cKeys );
    // Remove all keys between frame 10 and 20
    LogMessage( "keys in interval 10-20 : " +  fc3.GetNumKeys(10,20) );
    cKeys = fc2.RemoveKeys( 10, 20 );
    LogMessage( "keys removed " + cKeys );
    // Outputs:
    //INFO : "keys in interval 1-10 : 10"
    //INFO : "keys removed 10"
    //INFO : "total num keys : 90"
    //INFO : "keys removed 100"
    //INFO : "keys in interval 10-20 : 10"
    //INFO : "keys removed 11"

### See Also

FCurve.Locked FCurve.RemoveKey FCurve.RemoveKeyAtIndex FCurve.RemoveKeysAtIndex