Created
September 18, 2015 08:06
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import bpy | |
from math import floor | |
scalar_z = 2.3 | |
scalar_xy = 0.2 | |
def generate_face_keys(num_x, num_y): | |
faces = [] | |
verts_per_side_x = num_x | |
for i in range((num_x - 1) * (num_y - 1)): | |
x = (i % (num_x - 1)) | |
y = floor(i / (num_x - 1)) | |
level = x + (y * verts_per_side_x) | |
idx1 = level | |
idx2 = level + 1 | |
idx3 = level + verts_per_side_x + 1 | |
idx4 = level + verts_per_side_x | |
faces.append([idx1, idx2, idx3, idx4]) | |
return faces | |
def geometry_function(image_name): | |
img = bpy.data.images[image_name] | |
num_x = w = img_width = img.size[0] | |
num_y = h = img_height = img.size[1] | |
# work on copy only | |
pxls = img.pixels[:] | |
num_pixels = int(len(pxls) / 4) | |
verts = [] | |
add_vertex = verts.append | |
# generator expression | |
gen_obj = (i for i in pxls) | |
for idx in range(num_pixels): | |
y = int(idx / w) * scalar_xy | |
x = (idx % w) * scalar_xy | |
r = next(gen_obj) | |
g = next(gen_obj) | |
b = next(gen_obj) | |
a = next(gen_obj) | |
# height-map, would be grayscale, so z can be set to r*scalar | |
z = r * scalar_z | |
add_vertex((x, y, z)) | |
faces = generate_face_keys(num_x, num_y) | |
return verts, faces | |
def generate(func, image_name, geometry_name): | |
verts, faces = func(image_name) | |
mesh = bpy.data.meshes.new(geometry_name + "_mesh") | |
mesh.from_pydata(verts, [], faces) | |
mesh.update() | |
obj = bpy.data.objects.new(geometry_name, mesh) | |
bpy.context.scene.objects.link(obj) | |
obj.select = True | |
obj.show_bounds = True | |
generate(geometry_function, "arch_00MMM.png", "3d_Surface_Object") |
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