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#  as published by the Free Software Foundation; either version 2
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#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
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#  along with this program; if not, write to the Free Software Foundation,
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# <pep8 compliant>

import bpy


def randomize_selected(seed, delta, loc, rot, scale, scale_even):

    import random
    from random import uniform
    from mathutils import Vector

    random.seed(seed)

    def rand_vec(vec_range):
        return Vector(uniform(-val, val) for val in vec_range)

    for obj in bpy.context.selected_objects:

        if loc:
            if delta:
                obj.delta_location += rand_vec(loc)
            else:
                obj.location += rand_vec(loc)
        else:  # otherwise the values change under us
            uniform(0.0, 0.0), uniform(0.0, 0.0), uniform(0.0, 0.0)

        if rot:  # TODO, non euler's
            vec = rand_vec(rot)
            if delta:
                obj.delta_rotation_euler[0] += vec[0]
                obj.delta_rotation_euler[1] += vec[1]
                obj.delta_rotation_euler[2] += vec[2]
            else:
                obj.rotation_euler[0] += vec[0]
                obj.rotation_euler[1] += vec[1]
                obj.rotation_euler[2] += vec[2]
        else:
            uniform(0.0, 0.0), uniform(0.0, 0.0), uniform(0.0, 0.0)

        if scale:
            if delta:
                org_sca_x, org_sca_y, org_sca_z = obj.delta_scale
            else:
                org_sca_x, org_sca_y, org_sca_z = obj.scale

            if scale_even:
                sca_x = sca_y = sca_z = uniform(scale[0], - scale[0])
                uniform(0.0, 0.0), uniform(0.0, 0.0)
            else:
                sca_x, sca_y, sca_z = rand_vec(scale)

            if scale_even:
                aX = -(sca_x * org_sca_x) + org_sca_x
                aY = -(sca_x * org_sca_y) + org_sca_y
                aZ = -(sca_x * org_sca_z) + org_sca_z
            else:
                aX = sca_x + org_sca_x
                aY = sca_y + org_sca_y
                aZ = sca_z + org_sca_z

            if delta:
                obj.delta_scale = aX, aY, aZ
            else:
                obj.scale = aX, aY, aZ
        else:
            uniform(0.0, 0.0), uniform(0.0, 0.0), uniform(0.0, 0.0)


from bpy.props import *


class RandomizeLocRotSize(bpy.types.Operator):
    '''Randomize objects loc/rot/scale'''
    bl_idname = "object.randomize_transform"
    bl_label = "Randomize Transform"
    bl_options = {'REGISTER', 'UNDO'}

    random_seed = IntProperty(name="Random Seed",
        description="Seed value for the random generator",
        default=0, min=0, max=1000)

    use_delta = BoolProperty(name="Transform Delta",
        description="Randomize delta transform values instead of regular transform", default=False)

    use_loc = BoolProperty(name="Randomize Location",
        description="Randomize the location values", default=True)

    loc = FloatVectorProperty(name="Location",
        description="Maximun distance the objects can spread over each axis",
        default=(0.0, 0.0, 0.0), min=-100.0, max=100.0, subtype='TRANSLATION')

    use_rot = BoolProperty(name="Randomize Rotation",
        description="Randomize the rotation values", default=True)

    rot = FloatVectorProperty(name="Rotation",
        description="Maximun rotation over each axis",
        default=(0.0, 0.0, 0.0), min=-180.0, max=180.0, subtype='TRANSLATION')

    use_scale = BoolProperty(name="Randomize Scale",
        description="Randomize the scale values", default=True)

    scale_even = BoolProperty(name="Scale Even",
        description="Use the same scale value for all axis", default=False)

    '''scale_min = FloatProperty(name="Minimun Scale Factor",
        description="Lowest scale percentage possible",
        default=0.15, min=-1.0, max=1.0, precision=3)'''

    scale = FloatVectorProperty(name="Scale",
        description="Maximum scale randomization over each axis",
        default=(0.0, 0.0, 0.0), min=-100.0, max=100.0, subtype='TRANSLATION')

    def execute(self, context):
        from math import radians

        seed = self.random_seed

        delta = self.use_delta

        loc = None if not self.use_loc else self.loc
        rot = None if not self.use_rot else self.rot * radians(1.0)
        scale = None if not self.use_scale else self.scale

        scale_even = self.scale_even
        #scale_min = self.scale_min

        randomize_selected(seed, delta, loc, rot, scale, scale_even)

        return {'FINISHED'}


def menu_func(self, context):
    if context.mode == 'OBJECT':
        self.layout.operator(RandomizeLocRotSize.bl_idname,
        text="Randomize Transform")


def register():
    bpy.types.VIEW3D_MT_transform.append(menu_func)


def unregister():
    bpy.types.VIEW3D_MT_transform.remove(menu_func)

if __name__ == "__main__":
    register()
