The Hook Modifier is used to deform a Mesh, Curve a Lattice using another object (usually an Empty or a Bone but it can be any object).
As the hook moves, it pulls vertices from the mesh with it. You can think of it as animated proportional editing.
While hooks do not give you the fine control over vertices movement that shape keys do, they have the advantage that you can grab vertices directly for manipulation.
- The name of the object to hook vertices to.
- Vertex Group
Allows you to define the influence per vertex.
Useful when you do not something other than a spherical field of influence.
- The size of the hooks influence.
Adjust this hooks influence on the vertices, were (0.0 to 1.0) (no change to fully follows the hook).
Since multiple hooks can work on the same vertices, you can weight the influence of a hook using this property.
- Falloff Type
- This can be used to adjust the kind of curve that the hook has on the mesh. You can also define a custom curve to get a much higher level of control.
- Uniform Falloff
This setting is useful when using hooks on scaled objects, especially in cases where non-uniform scale would stretch the result of the hook.
This is especially useful for lattices, where its common to use non-uniform scaling.
The following settings are only available in Edit Mode:
- Recalculate and clear the offset transform of hook.
- Set hook center to the 3D cursor position.
- Select the vertices affected by this hook.
- Assigns selected vertices to this hook.
The Hook Modifier stores vertex indices from the original mesh to determine what to affect; this means that modifiers that generate geometry, like a Subdivision Surface Modifier, should always be applied after the Hook Modifier; otherwise the generated geometry will be left out of the hook’s influence.