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intersect_bug.py
Valeri Barashkov (valera)
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intersect_bug.py
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#
# RUN THIS FIRST TO MAKE COPIES OF OBJECTS
# SELECT SURFACE AND THEN RUN
#
import bpy
import bmesh
import time
from mathutils.bvhtree import BVHTree
from mathutils import Vector
from random import randint
scene = bpy.context.scene
sphere = scene.objects["Sphere"]
surface = bpy.context.selected_objects[0]
obj_bvh_list = []
num_of_copies = 30 #user specified number of objects
def deleteThis(obj):
if bpy.context.mode != 'OBJECT':
print("Error: Change to Object Mode before running script!")
bpy.ops.object.select_all(action = 'DESELECT')
bpy.data.objects[obj.name].select = True
bpy.ops.object.delete(use_global=False)
def makeBVH(obj):
bm = bmesh.new()
bm.from_mesh(obj.data)
bm.transform(obj.matrix_world)
obj_bvh = BVHTree.FromBMesh(bm)
bm.free()
return obj_bvh
def isIntersect(target_bvh):
for o in obj_bvh_list:
inter = target_bvh.overlap(o)
if inter != []:
return True
return False
#makes a copy of an object if there is space
def spawn(thing, v_loc, v_normal):
print("Making copy of object and object BVH")
new_obj = thing.copy()
new_obj.data = thing.data
#location
new_obj.matrix_world.translation = surface.matrix_world.translation + v_loc
#rotation
dirVector = Vector(v_normal)
new_obj.rotation_mode = 'QUATERNION'
new_obj.rotation_quaternion = dirVector.to_track_quat('Z','Y')
new_obj_bvh = makeBVH(new_obj)
if not isIntersect(new_obj_bvh):
obj_bvh_list.append(new_obj_bvh)
scene.objects.link(new_obj)
else:
deleteThis(new_obj)
return False
return True
if __name__ == "__main__":
print("\nRUNNING....")
verts = surface.data.vertices
i = 0 #used to prevent using previous vertices
while i < len(verts) and len(obj_bvh_list) < num_of_copies:
print("while")
for v in verts[i:]:
i += 1
if(spawn(sphere, v.co, v.normal)):
print("Spawn")
break
print("FINISHED")

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