To write the continuation three years later ...

Introduction to blender python script_Part 01

I touched Blender's Python console three years ago, and I had the opportunity to touch it for the first time in three years, so I would like to continue writing.

Blender version

Blender 2.8.1a: It looks like there have been major UI and API changes.

Debug environment on Blender

The layout is as follows.

無題.png

I placed the Text Editor at the bottom left of the figure display and the Python Editor at the bottom right.

Try to display the minimum point data.

The script is based on the reference Visualize point cloud with Blender + Python article.

import bpy
import numpy as np

def render(points):
    bpy.ops.object.select_all(action="SELECT")
    bpy.ops.object.delete(True)

    mat = bpy.data.materials.new("BLUE")
    mat.diffuse_color = (.33, .43, .95, 1)

    bpy.ops.mesh.primitive_plane_add(location=(0, 0, -1))
    plane = bpy.context.object
    plane.scale = (100, 100, 1)

    for x, y, z in points:
        bpy.ops.mesh.primitive_uv_sphere_add(location=(x, y, z))
        sphere = bpy.context.object
        sphere.scale = (0.02, 0.02, 0.02)
        sphere.data.materials.append(mat)

    for loc, rot in [[(0, -5, 5), (-np.pi * 1 / 4, 0, np.pi)],
                     [(0, 5, 5), (np.pi * 1 / 4, 0, -np.pi)],
                     [(-5, 0, 5), (-np.pi * 1 / 4, 0, np.pi / 2)],
                     [(5, 0, 5), (-np.pi * 1 / 4, 0, -np.pi / 2)]]:
        light_data = bpy.data.lights.new(name="light", type="AREA")
        light_data.energy = 500
        light_object = bpy.data.objects.new(name="light", object_data=light_data)
        bpy.context.collection.objects.link(light_object)
        bpy.context.view_layer.objects.active = light_object
        light_object.location = loc
        light_object.rotation_euler = rot

    bpy.ops.object.camera_add(location=(3.25, -2.48, 0.745))
    camera_rotations = (np.pi * 78 / 180, 0, 52.5 * np.pi / 180)
    bpy.data.objects["Camera"].rotation_euler = camera_rotations

    bpy.context.scene.render.resolution_x = 500
    bpy.context.scene.render.resolution_y = 500
    bpy.context.scene.render.resolution_percentage = 100
    bpy.context.scene.camera = bpy.context.object
    # bpy.context.scene.render.image_settings.file_format = "PNG"
    bpy.ops.render.render(write_still=True)

if __name__ == "__main__":
    points = np.loadtxt("C:\\Blender_works\\min_sample.csv", delimiter=",")
    render(points)

Let's visualize about 1000 data.

Data creation script

import numpy as np
import pandas as pd
N = 1000
df =pd.DataFrame({
    "x": np.random.uniform(0.0, 10., N),
    "y": np.random.uniform(0.0, 10., N),
    "z": np.random.uniform(0.0, 10., N)
})
df.to_csv("./random_data.csv", header=False, index=False)

next time

I would like to investigate the cooperation of Jupyter notebook.

I tried to get started with blender python script_Part 02