New hair editing feature "Shape Cut", for cutting hair based on a mesh

shape instead of a brush tool.

The brush cutting tool for hair, while useful, is not very accurate and
often requires rotating the model constantly to get the right trimming
on every side. This makes adjustments to a hair shape a very tedious
process.

On the other hand, making proxy meshes for hair shapes is a common
workflow. The new operator allows using such rough meshes as boundaries
for hair. All hairs that are outside the shape mesh are removed, while
those cutting it at some length are shortened accordingly.

The operator can be accessed in the particle edit mode toolbar via the
"Shape Cut" button. The "Shape Object" must be set first and stays
selected as a tool setting for repeatedly applying the shape.

1 files changed, 2 insertions, 0 deletions

diff --git a/source/blender/editors/physics/physics_intern.h b/source/blender/editors/physics/physics_intern.h
index b8955c8c397..705235a376e 100644
--- a/source/blender/editors/physics/physics_intern.h
+++ b/source/blender/editors/physics/physics_intern.h
@@ -56,6 +56,8 @@ void PARTICLE_OT_mirror(struct wmOperatorType *ot);
 
 void PARTICLE_OT_brush_edit(struct wmOperatorType *ot);
 
+void PARTICLE_OT_shape_cut(struct wmOperatorType *ot);
+
 void PARTICLE_OT_particle_edit_toggle(struct wmOperatorType *ot);
 void PARTICLE_OT_edited_clear(struct wmOperatorType *ot);