non uniform cell shape, currently only xyz scale.

object_fracture_cell/__init__.py

@@ -40,6 +40,7 @@ from bpy.props import (StringProperty,
                        BoolProperty,
                        IntProperty,
                        FloatProperty,
+                       FloatVectorProperty,
                        EnumProperty)
 
 from bpy.types import Operator
@@ -192,6 +193,14 @@ class FractureCell(Operator):
             default=0.0,
             )
 
+    cell_scale = FloatVectorProperty(
+            name="Scale",
+            description="Scale Cell Shape",
+            size=3,
+            min=0.0, max=1.0,
+            default=(1.0, 1.0, 1.0),
+            )
+
     # -------------------------------------------------------------------------
     # Recursion
 
@@ -330,6 +339,7 @@ class FractureCell(Operator):
         rowsub.prop(self, "source_limit")
         rowsub.prop(self, "source_noise")
         rowsub = col.row()
+        rowsub.prop(self, "cell_scale")
 
         box = layout.box()
         col = box.column()

object_fracture_cell/fracture_cell_calc.py

@@ -21,7 +21,9 @@
 # Script copyright (C) Blender Foundation 2012
 
 
-def points_as_bmesh_cells(verts, points,
+def points_as_bmesh_cells(verts,
+                          points,
+                          points_scale=None,
                           margin_bounds=0.05,
                           margin_cell=0.0):
     from math import sqrt
@@ -29,6 +31,14 @@ def points_as_bmesh_cells(verts, points,
     from mathutils import Vector
 
     cells = []
+    
+    '''
+    if points_scale:
+        points_scale = (1.0 / points_scale[0],
+                        1.0 / points_scale[1],
+                        1.0 / points_scale[2],
+                        )
+    '''
 
     points_sorted_current = [p for p in points]
     plane_indices = []
@@ -65,6 +75,20 @@ def points_as_bmesh_cells(verts, points,
         for j in range(1, len(points)):
             normal = points_sorted_current[j] - point_cell_current
             nlength = normal.length
+
+            if points_scale is not None:                
+                normal_alt = normal.copy()
+                normal_alt.x *= points_scale[0]
+                normal_alt.y *= points_scale[1]
+                normal_alt.z *= points_scale[2]
+
+                # rotate plane to new distance
+                # should always be positive!! - but abs incase
+                scalar = normal_alt.normalized().dot(normal.normalized())
+                # assert(scalar >= 0.0)
+                nlength *= scalar
+                normal = normal_alt
+
             if nlength > distance_max:
                 break
 

object_fracture_cell/fracture_cell_setup.py

@@ -125,6 +125,7 @@ def cell_fracture_objects(scene, obj,
                           margin=0.0,
                           material_index=0,
                           use_debug_redraw=False,
+                          cell_scale=(1.0, 1.0, 1.0),
                           ):
     
     from . import fracture_cell_calc
@@ -136,7 +137,7 @@ def cell_fracture_objects(scene, obj,
 
     if not points:
         # print using fallback
-        points = _points_from_object(obj, source | {'VERT_OWN'})
+        points = _points_from_object(obj, {'VERT_OWN'})
 
     if not points:
         print("no points found")
@@ -187,7 +188,9 @@ def cell_fracture_objects(scene, obj,
     matrix = obj.matrix_world.copy()
     verts = [matrix * v.co for v in mesh.vertices]
 
-    cells = fracture_cell_calc.points_as_bmesh_cells(verts, points,
+    cells = fracture_cell_calc.points_as_bmesh_cells(verts,
+                                                     points,
+                                                     cell_scale,
                                                      margin_cell=margin)
 
     # some hacks here :S