Ràng Buộc IK Chốt Trục (Spline IK Constraint)¶
The Spline IK constraint fits a chain of bones to the shape of a Curve. It's particularly well suited for rigging flexible body parts such as tails, tentacles, and spines, as well as inorganic objects such as ropes.
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The IK constraints are special in that they modify multiple bones. For this reason, they ignore their position in the stack and always run after all other constraints on the affected bones. To apply constraints after IK, it is necessary to first copy the final transformation to a new bone chain, e.g. using Copy Transforms.
Các Tùy Chọn (Options)¶
Spline IK constraint.¶
- Target
The Curve whose shape to match.
- Tác Động/Ảnh Hưởng (Influence)
How strongly the constraint affects the bone chain.
Khít Vừa (Fitting)¶
- Chiều Dài của Dây Chuyền (Chain Length)
The number of bones affected by the constraint, starting with the owner bone and walking up its chain of ancestors. A value of 1 will only fit the bone itself, a value of 2 will fit the bone and its parent, and so on.
- Even Divisions
When disabled, each bone will cover a distance along the curve relative to its rest length. When enabled, each bone will cover the same distance regardless of its rest length.
- Dịch Chuyển của Dây Chuyền (Chain Offset)
When disabled, the bone chain will move to match the position of the curve. When enabled, the bone chain will stay at its original starting location and mimic the shape of the curve from there.
Đổi Tỷ Lệ Dây Chuyền (Chain Scaling)¶
- Dùng Bán Kính Đường Cong (Use Curve Radius)
Whether to use the radii of the curve control points as additional X and Z scaling factors for the bones.
- Chế Độ Tỷ Lệ Hóa Y (Y Scale Mode)
How to stretch the bones along the length of the curve.
- Không (None):
Reset the bones to their rest length.
- Khít Vừa Đường Cong (Fit Curve):
Stretch the bones to cover the entire length of the curve.
- Nguyên Gốc của Xương (Bone Original):
Keep the bones' original length (including their Pose Mode scale).
- Chế Độ Đổi Tỷ Lệ XZ (XZ Scale Mode)
How to scale the bones along the normals of the curve (or in other words, how to determine the thickness of the bones).
- Không (None):
Reset the bones' X and Z scales to 1.
- Nguyên Gốc của Xương (Bone Original):
Keep the bones' original X and Z scales from Pose Mode.
- Đảo Nghịch Tỷ Lệ (Inverse Scale):
Set the X and Z scales to the inverse of the Y scale.
- Giữ Nguyên Thể Tích (Volume Preservation):
Similar to the Kéo Giãn tới (Stretch To) constraint.
- Sử Dụng Tỷ Lệ Gốc (Use Original Scale)
Apply Inverse Scale or Volume Preservation on top of the Pose Mode bone scales, like in the Stretch To constraint.
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This subject is seen in-depth in the Armature Posing section.