siFCurveKeyConstraint

Description

Function curve key constraints. The last seven tangent constraints apply only to standard function curves. FCurve key constraints can be set and retrieved via the FCurveKey.Constraint property.

The constraints are not mutally exclusive for example if you have the siParameterConstraint set and clear the siLockConstraint you will also clear the siParameterConstraint. You cannot set constraints on a raw function curve. They will be ignored.

C# Syntax

siFCurveKeyConstraint.siParameterConstraint                                 // 1
siFCurveKeyConstraint.siLeftRightValuesConstraint                           // 2
siFCurveKeyConstraint.siG1ContinuousConstraint                              // 4
siFCurveKeyConstraint.siLeftRightTangentDirectionConstraint                 // 8
siFCurveKeyConstraint.siLeftRightTangentLengthConstraint                    // 16
siFCurveKeyConstraint.siLockConstraint                                      // 32
siFCurveKeyConstraint.siHorizontalTangentConstraint                         // 64
siFCurveKeyConstraint.siExtremumHorizontalTangentConstraint                 // 128
siFCurveKeyConstraint.siAdjustedTangentConstraint                           // 256
siFCurveKeyConstraint.siZeroLengthTangentConstraint                         // 512
siFCurveKeyConstraint.siSameLengthTangentConstraint                         // 1024
siFCurveKeyConstraint.siNeighborTangentConstraint                           // 2048
siFCurveKeyConstraint.siMirrorTangentConstraint                             // 4096

Constant

Value

Description

siParameterConstraint

1

If on, the parameter (or key time) is locked.

siLeftRightValuesConstraint

2

If on, the left and right key values are locked.

siG1ContinuousConstraint

4

If on, the left and right tangent orientations are the same.

siLeftRightTangentDirectionConstraint

8

If on, the left and right tangent directions are locked.

siLeftRightTangentLengthConstraint

16

If on, the left and right tangent lengths are locked.

siLockConstraint

32

If on, the parameter, values, and tangents are locked.

siHorizontalTangentConstraint

64

If on, the tangents are considered horizontal.

siExtremumHorizontalTangentConstraint

128

If on, the tangents are considered as horizontal when the key is a local extremum.

siAdjustedTangentConstraint

256

If on, the tangents are adjusted automatically when neighbouring keys are created or moved.

siZeroLengthTangentConstraint

512

If on, the left and right tangent lengths are constrained to be zero.

siSameLengthTangentConstraint

1024

If on, the left and right tangent lengths are the same.

siNeighborTangentConstraint

2048

If on, the left and right tangent point at the previous and next keys.

siMirrorTangentConstraint

4096

If on, the left and right tangents are mirrored.

Applies To

FCurveKey.Constraint

FCurveKey.GetConstraint2

FCurveKey::GetConstraint

FCurveKey::PutConstraint

See Also

FCurve.SI3DStyle

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