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2018-06-28T19:42:11Z

1版をインポートしました

wiki>Ideasman42: /* Hex Root */

2012-01-02T14:45:33Z

‎Hex Root

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=== Hex Root ===
A fun one, this is the 'hex', like the square, if you have a hexagon this is how to know the total number of hexagons in the center from the number on 1 side as well as the hex root.

<source lang="python">
import math

def hex(x):
a = (((x - 1.0) * 3.0) * x) + 1.0
return a

def hex_root(a):
x = (3.0 + math.sqrt(9.0 - (12.0 * (1.0 - a)))) / 6.0
return x
</source>

or more info http://en.wikipedia.org/wiki/Centered_hexagonal_number

=== Align Matrix Axis ===
Used this to create all possible axis flipping for blender python.
<source lang="python">
from mathutils import Vector, Matrix

def align_matrix(mat, axis, vec, eps=0.000001):
if axis == 'X':
ori = mat[2].copy()
if abs(vec.dot(ori)) > (1.0 - eps):
ori = mat[1].copy()
x = vec
y = ori.cross(x)
z = x.cross(y)
elif axis == 'Y':
ori = mat[0].copy()
if abs(vec.dot(ori)) > (1.0 - eps):
ori = mat[2].copy()
y = vec
z = ori.cross(y)
x = y.cross(z)
elif axis == 'Z':
ori = mat[1].copy()
if abs(vec.dot(ori)) > (1.0 - eps):
ori = mat[0].copy()
z = vec
x = ori.cross(z)
y = z.cross(x)

mat[0] = x.normalized()
mat[1] = y.normalized()
mat[2] = z.normalized()

def world_transform(axis, up):

axis_vec = Vector()
up_vec = Vector()

axis_vec[ord(axis[-1]) - ord('X')] = -1.0 if axis.startswith('-') else 1.0
up_vec[ord(up[-1]) - ord('X')] = -1.0 if up.startswith('-') else 1.0

mat = Matrix()
mat = mat.to_3x3()
mat.identity()

align_matrix(mat, 'Y', up_vec)
align_matrix(mat, 'Z', axis_vec)

# print(mat)
return mat

import bpy
# bpy.context.object.matrix_world = world_transform('Z', '-X').to_4x4()
opts = ('X', 'Y', 'Z', '-X', '-Y', '-Z')

for a in opts:
for b in opts:
if a[-1] != b[-1]:
mat = world_transform(a, b)
exp = tuple([tuple([j for j in k]) for k in mat])
print("%s: %s," % ((a, b), exp))
</source>

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Yamyam: 1版 をインポートしました

wiki>Ideasman42: /* Hex Root */

Yamyam: 1版をインポートしました