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# SPDX-License-Identifier: GPL-2.0-or-later
# Author: Phil Cote, cotejrp1, (http://www.blenderaddons.com)
import bpy
import bmesh
from bpy.props import (
FloatProperty,
IntProperty,
StringProperty,
BoolProperty,
)
from math import pi
from mathutils import (
Quaternion,
Vector,
)
from bpy_extras import object_utils
def create_step(width, base_level, step_height, num_sides):
axis = [0, 0, -1]
PI2 = pi * 2
rad = width / 2
quat_angles = [(cur_side / num_sides) * PI2
for cur_side in range(num_sides)]
quaternions = [Quaternion(axis, quat_angle)
for quat_angle in quat_angles]
init_vectors = [Vector([rad, 0, base_level])] * len(quaternions)
quat_vector_pairs = list(zip(quaternions, init_vectors))
vectors = [quaternion @ vec for quaternion, vec in quat_vector_pairs]
bottom_list = [(vec.x, vec.y, vec.z) for vec in vectors]
top_list = [(vec.x, vec.y, vec.z + step_height) for vec in vectors]
full_list = bottom_list + top_list
return full_list
def split_list(l, n):
"""
split the blocks up. Credit to oremj for this one.
http://stackoverflow.com/questions/312443/how-do-you-split-a-list-into-evenly-sized-chunks-in-python
"""
n *= 2
returned_list = [l[i: i + n] for i in range(0, len(l), n)]
return returned_list
def get_connector_pairs(lst, n_sides):
# chop off the verts that get used for the base and top
lst = lst[n_sides:]
lst = lst[:-n_sides]
lst = split_list(lst, n_sides)
return lst
def pyramid_mesh(self, context):
all_verts = []
height_offset = 0
cur_width = self.width
for i in range(self.num_steps):
verts_loc = create_step(cur_width, height_offset, self.height,
self.num_sides)
height_offset += self.height
cur_width -= self.reduce_by
all_verts.extend(verts_loc)
mesh = bpy.data.meshes.new("Pyramid")
bm = bmesh.new()
for v_co in all_verts:
bm.verts.new(v_co)
def add_faces(n, block_vert_sets):
for bvs in block_vert_sets:
for i in range(self.num_sides - 1):
bm.faces.new([bvs[i], bvs[i + n], bvs[i + n + 1], bvs[i + 1]])
bm.faces.new([bvs[n - 1], bvs[(n * 2) - 1], bvs[n], bvs[0]])
# get the base and cap faces done.
bm.faces.new(bm.verts[0:self.num_sides])
bm.faces.new(reversed(bm.verts[-self.num_sides:])) # otherwise normal faces intern... T44619.
# side faces
block_vert_sets = split_list(bm.verts, self.num_sides)
add_faces(self.num_sides, block_vert_sets)
# connector faces between faces and faces of the block above it.
connector_pairs = get_connector_pairs(bm.verts, self.num_sides)
add_faces(self.num_sides, connector_pairs)
bm.to_mesh(mesh)
mesh.update()
return mesh
class AddPyramid(bpy.types.Operator, object_utils.AddObjectHelper):
bl_idname = "mesh.primitive_steppyramid_add"
bl_label = "Pyramid"
bl_description = "Construct a step pyramid mesh"
bl_options = {'REGISTER', 'UNDO', 'PRESET'}
Pyramid : BoolProperty(name = "Pyramid",
default = True,
description = "Pyramid")
change : BoolProperty(name = "Change",
default = False,
description = "change Pyramid")
num_sides: IntProperty(
name="Number Sides",
description="How many sides each step will have",
min=3,
default=4
)
num_steps: IntProperty(
name="Number of Steps",
description="How many steps for the overall pyramid",
min=1,
default=10
)
width: FloatProperty(
name="Initial Width",
description="Initial base step width",
min=0.01,
default=2
)
height: FloatProperty(
name="Height",
description="How tall each step will be",
min=0.01,
default=0.1
)
reduce_by: FloatProperty(
name="Reduce Step By",
description="How much to reduce each succeeding step by",
min=.01,
default=.20
)
def draw(self, context):
layout = self.layout
layout.prop(self, 'num_sides', expand=True)
layout.prop(self, 'num_steps', expand=True)
layout.prop(self, 'width', expand=True)
layout.prop(self, 'height', expand=True)
layout.prop(self, 'reduce_by', expand=True)
if self.change == False:
col = layout.column(align=True)
col.prop(self, 'align', expand=True)
col = layout.column(align=True)
col.prop(self, 'location', expand=True)
col = layout.column(align=True)
col.prop(self, 'rotation', expand=True)
def execute(self, context):
# turn off 'Enter Edit Mode'
use_enter_edit_mode = bpy.context.preferences.edit.use_enter_edit_mode
bpy.context.preferences.edit.use_enter_edit_mode = False
if bpy.context.mode == "OBJECT":
if context.selected_objects != [] and context.active_object and \
(context.active_object.data is not None) and ('Pyramid' in context.active_object.data.keys()) and \
(self.change == True):
obj = context.active_object
oldmesh = obj.data
oldmeshname = obj.data.name
obj.data = pyramid_mesh(self, context)
for material in oldmesh.materials:
obj.data.materials.append(material)
bpy.data.meshes.remove(oldmesh)
obj.data.name = oldmeshname
else:
mesh = pyramid_mesh(self, context)
obj = object_utils.object_data_add(context, mesh, operator=self)
obj.data["Pyramid"] = True
obj.data["change"] = False
for prm in PyramidParameters():
obj.data[prm] = getattr(self, prm)
if bpy.context.mode == "EDIT_MESH":
active_object = context.active_object
name_active_object = active_object.name
bpy.ops.object.mode_set(mode='OBJECT')
mesh = pyramid_mesh(self, context)
obj = object_utils.object_data_add(context, mesh, operator=self)
obj.select_set(True)
active_object.select_set(True)
bpy.context.view_layer.objects.active = active_object
bpy.ops.object.join()
context.active_object.name = name_active_object
bpy.ops.object.mode_set(mode='EDIT')
if use_enter_edit_mode:
bpy.ops.object.mode_set(mode = 'EDIT')
# restore pre operator state
bpy.context.preferences.edit.use_enter_edit_mode = use_enter_edit_mode
return {'FINISHED'}
def PyramidParameters():
PyramidParameters = [
"num_sides",
"num_steps",
"width",
"height",
"reduce_by",
]
return PyramidParameters
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