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drop_to_ground.py
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drop_to_ground.py
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# ##### BEGIN GPL LICENSE BLOCK #####
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# ##### END GPL LICENSE BLOCK #####
bl_info = {
"name": "Drop to ground",
"author": "Unnikrishnan(kodemax), Florian Meyer(testscreenings)",
"version": (1, 1),
"blender": (2, 5, 9),
"api": 39740,
"location": "Tool shelf",
"description": "Drops the selected objects to the active object",
"warning": "Before using it do :- ctrl+a -> apply rotation on the object to be dropped",
"wiki_url": "http://wiki.blender.org/index.php/Extensions:2.5/Py/Scripts/Object/Drop_to_ground",
"tracker_url": "http://projects.blender.org/tracker/?func=detail&atid=467&aid=25349",
"category": "Object"}
import bpy
from bpy.props import *
import mathutils
import math
def get_align_matrix(location, normal):
up = mathutils.Vector((0,0,1))
angle = normal.angle(up)
axis = up.cross(normal)
mat_rot = mathutils.Matrix.Rotation(angle, 4, axis)
mat_loc = mathutils.Matrix.Translation(location)
mat_align = mat_rot * mat_loc
return mat_align
def get_lowest_Coord1(ob):
matrix = ob.matrix_world.copy()
verts = ob.data.vertices
lowest = mathutils.Vector((0,0,10000))
for vert in verts:
if (matrix * vert.co).z < lowest.z:
lowest = matrix * vert.co
return lowest
def do_drop(context,tmpObj, ob):
print('\n', ob.name)
align_object = context.scene.align_object
use_center = context.scene.use_center
lowest = get_lowest_Coord1(ob)
location, normal, index = tmpObj.ray_cast(lowest, lowest + mathutils.Vector((0,0,-10000)))
if not index == -1:
if not use_center:
temp = (bpy.context.scene.cursor_location).copy()
bpy.context.scene.cursor_location = lowest
bpy.ops.object.origin_set(type = 'ORIGIN_CURSOR')
if align_object:
sca = ob.scale.copy()
mat_align = get_align_matrix(location, normal)
ob.matrix_world = mat_align
ob.scale = sca
else:
ob.location = location
if not use_center:
bpy.context.scene.cursor_location = temp
bpy.ops.object.origin_set(type = 'ORIGIN_GEOMETRY')
else:
print('\nno hit')
return
def main(self, context):
print('\n_______START__________')
obs = bpy.context.selected_objects
ground = bpy.context.active_object
obs.remove(ground)
context = bpy.context
sc = context.scene
tmpMesh = ground.to_mesh(sc, True, 'PREVIEW')
tmpMesh.transform(ground.matrix_world)
tmpObj = bpy.data.objects.new('tmpGround', tmpMesh)
"""tmpObj.update(sc, 1, 1, 1)"""
sc.objects.link(tmpObj)
sc.update()
for ob in obs:
bpy.ops.object.select_all(action='DESELECT')
ob.select = True
do_drop(context, tmpObj, ob)
bpy.ops.object.select_all(action='DESELECT')
tmpObj.select = True
bpy.ops.object.delete('EXEC_DEFAULT')
for ob in obs:
ob.select = True
ground.select = True
class VIEW3D_PT_tools_drop_to_ground(bpy.types.Panel):
bl_space_type = 'VIEW_3D'
bl_region_type = 'TOOLS'
bl_label = "Drop to ground"
bl_context = "objectmode"
def draw(self, context):
active_obj = context.active_object
layout = self.layout
col = layout.column(align=True)
col.operator("object.drop_to_ground", text="Drop")
col.prop(context.scene, "align_object")
col.prop(context.scene, "use_center")
class OBJECT_OT_drop_to_ground(bpy.types.Operator):
"""Drop to ground"""
bl_idname = "object.drop_to_ground"
bl_label = "Drop to ground"
bl_description = "Drops selected objects onto the active object"
bl_options = {'REGISTER', 'UNDO'}
def execute(self, context):
main(self, context)
return {'FINISHED'}
#### REGISTER ####
def register():
bpy.utils.register_module(__name__)
bpy.types.Scene.align_object = BoolProperty(
name="Align object to ground",
description="Aligns the object to the ground",
default=True)
bpy.types.Scene.use_center = BoolProperty(
name="Use the center to drop",
description="When dropping the object will be relocated on the basis of its senter",
default=False)
def unregister():
bpy.utils.unregister_module(__name__)
del bpy.types.Scene.align_object
del bpy.types.Scene.use_center
if __name__ == '__main__':
register()

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