enzyme69
commented
4 years ago Advanced version with SNL Recursive Subdivision, "subdiv_probability" by Benny:
"""
in quad_verts v
in quad_faces s
in seed s d=1 n=2
in random_factor s d=0.1 n=2
in iterations s d=1 n=2
in subdiv_probability s d=0.1 n=2
out verts v
out edges s
out faces s
"""
from sverchok.utils.modules.geom_utils import interp_v3_v3v3 as lerp
from sverchok.utils.sv_mesh_utils import mesh_join
from sverchok.utils.sv_bmesh_utils import remove_doubles
import random
# loosly based on https://www.youtube.com/watch?v=GhquYJ9m1Oc
sort = lambda vex, pox: [vex[i] for i in pox]
def random_subdiv_mesh(verts_m, pols_m, iteration):
verts, faces = [], []
for pol in pols_m:
verts_out, faces_out = [], []
new_quad = faces_out.append
pts = sort(verts_m, pol)
if random.random()>subdiv_probability:
X = 0.5 +(random.random() - 0.5) * random_factor
Y = 0.5 +(random.random() - 0.5) * random_factor
pos_a = lerp(pts[0], pts[1], Y)
pos_b = lerp(pts[1], pts[2], X)
pos_c = lerp(pts[3], pts[2], 1-Y)
pos_d = lerp(pts[0], pts[3], X)
pos_e = lerp(pos_d, pos_b, Y)
pos_f = lerp(pos_d, pos_b, 1-Y)
# indices = 0, 1, 2, 3
verts_out.extend(pts)
# indices = 4, 5, 6, 7, 8, 9
verts_out.extend([pos_a, pos_b, pos_c, pos_d, pos_e, pos_f])
new_quad([0, 4, 8, 7])
new_quad([4, 1, 5, 8])
new_quad([5, 2, 6, 9])
new_quad([7, 9, 6, 3])
else:
verts_out.extend(pts)
new_quad([0, 1, 2, 3])
faces.append(faces_out)
verts.append(verts_out)
verts, _, faces = mesh_join(verts, [], faces)
if iteration < 2:
return verts, faces
else:
return random_subdiv_mesh(verts, faces, iteration - 1)
if quad_verts and quad_faces:
random.seed(seed)
verts, faces = random_subdiv_mesh(quad_verts[0], quad_faces[0], iterations)
verts, edges, faces = remove_doubles(verts, [], faces, 1e-5)
verts = [verts]
edges = [edges]
faces = [faces]
tile_recursive_004.blend.zip