Hook Modifier
The Hook Modifier is used to deform stroke points using another object (usually an empty or a bone but it can be any object).
As the hook moves, it pulls points from the strokes with it. You can think of it as animated Proportional Editing.
Options
![../../../_images/grease-pencil_modifiers_deform_hook_panel.png](../../../_images/grease-pencil_modifiers_deform_hook_panel.png)
The Hook modifier.
- Object
The name of the object to hook points to.
- Vertex Group
Restricts the effect only to a vertex group.
- Strength
Adjust this hooks influence on the stroke points, were (0.0 to 1.0) (no change to fully follow the hook).
Falloff
- Type
This can be used to adjust the type of curve for the Strength attenuation. You can also define a custom curve to get a much higher level of control.
- Radius
The size of the hooks influence.
- 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.
Influence
See Influence Filters.
Obs
The Hook Modifier stores points indices from the original strokes 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.
Example
![../../../_images/grease-pencil_modifiers_deform_hook_sample.png](../../../_images/grease-pencil_modifiers_deform_hook_sample.png)
Empty used as a hook to manipulate a vertex group (right eye of the monkey).