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| import bpy
import bmesh
import numpy as np
np.random.seed(42)
def generate_continuous_fiber(z_base, z_variation, num_fibers, num_segments, step_size, square_size):
verts = []
edges = []
half_square = square_size / 2 # 正方形边界的一半
vert_index = 0
for _ in range(num_fibers):
start_point = np.array([
np.random.uniform(-half_square, half_square),
np.random.uniform(-half_square, half_square),
z_base
])
verts.append(start_point)
for _ in range(1, num_segments):
while True:
step_direction = np.random.uniform(-1, 1, 3)
step_direction[2] = 0
step = step_size * step_direction / np.linalg.norm(step_direction)
next_point = verts[-1] + step
next_point[2] = z_base + np.random.uniform(-z_variation, z_variation)
if -half_square <= next_point[0] <= half_square and -half_square <= next_point[1] <= half_square:
verts.append(next_point)
edges.append((vert_index, vert_index + 1))
vert_index += 1
break
return verts, edges
\# 参数
z_base = 0.5
z_variation = 0.005
num_fibers = 1
num_segments_per_fiber = 8000
step_size = 0.6
square_size = 2.0
verts, edges = generate_continuous_fiber(z_base, z_variation, num_fibers, num_segments_per_fiber, step_size, square_size)
\# 创建一个新的Mesh数据
mesh = bpy.data.meshes.new("fiber_mesh")
obj = bpy.data.objects.new("Fiber", mesh)
\# 将对象添加到场景中，并确保它是可见的
scene = bpy.context.scene
scene.collection.objects.link(obj)
bpy.context.view_layer.objects.active = obj
\# 使用verts和edges更新mesh
mesh = obj.data
bm = bmesh.new()
for v in verts:
bm.verts.new(v)
for e in edges:
bm.edges.new((bm.verts[e[0]], bm.verts[e[1]]))
bm.to_mesh(mesh)
bm.free()
|
