3D Modeling and Printing by Python
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Port scannerScripting languageGraphics processing unitComputer-aided designOpen setMultiplicationMathematical singularityData modelHill differential equationEndliche ModelltheorieSoftwareWordStreaming mediaProteinWritingOpen sourceObject (grammar)TouchscreenDialectOpen setMultiplication signQuicksortProduct (business)Data structureAuthorizationProgramming languagePrologComputer programScaling (geometry)Video projectorNormal (geometry)Software frameworkSoftware testingProjective planeScripting languageMultiplicationGraphical user interfaceComputer animationLecture/Conference
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Port scannerLine (geometry)Scripting languageServer (computing)Data modelHecke operatorGraph (mathematics)SoftwareShape (magazine)CodeRight angleScripting languageProjective planeEndliche ModelltheorieSoftware engineeringSystem callGroup actionMultiplication signComputer animationLecture/Conference
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Transcript: English(auto-generated)
00:00
Okay, so welcome after all the lunch, please welcome Takuro Wada, who is going to be talking about 3D modeling and printing by Python.
00:20
So thank you for coming this talk and I'm going to talk about 3D modeling and printing by Python. So first of all, let me introduce myself in brief. My name is Takuro and I'm a software engineer in Kabuku. And Kabuku is a Japanese state which is providing services related to 3D printing.
00:43
And who uses 3D printing before? Okay, okay. So I'd like to explain first about 3D printing today. So what is 3D printing? Originally, 3D printing is creating products by forming successful layers of material based
01:05
on 3D data. So this is an example of 3D printer. This is the most prevailing method of 3D printer which is called FDM. And in this method, this method uses a plastic tube and melting it to create layers.
01:28
So okay, so what is required for 3D printing? So as I said, 3D printing is creating a successful material layer based on 3D data.
01:42
So we need 3D data and 3D printer. So regarding 3D data, 3D printer, please buy it or you can use 3D printer service bureau or like Shapeways or Scrubtail or Rinkaku. So regarding 3D data, you can get by Marge Broadway.
02:05
For example, you can buy 3D data from some website or you can download 3D data from some other website or of course, you can create your own 3D data by yourself.
02:21
And today, I'm going to focus on creating 3D data. So I'd like to talk about it. And so how to create 3D data? So I'd like to introduce one example of 3D data format which is called STL.
02:42
And STL has two type format, binaries and ASCII and this is ASCII. So seeing this format, you can see from second line to eighth line, there is a definition
03:01
of triangle which is called polygon and the 3D model is consist of bunch of polygons. So the format is so simple. So you can also find successful triangle definition is following the first triangle
03:22
definition. So it's very exact, so simple. So format is so simple. So you can write your program to create this kind of data structure, but creating this kind of 3D data from scratch is so hard task.
03:42
So because you have to do some complicated matrix calculation or vector calculation, so it's not good idea to create software from scratch. So many people using this kind of existing software like Maya, 3DS Max, Blender or SolidWorks
04:05
or Ryan Seres and fortunately, this kind of software provide in the Python API. So that means you can manipulate or control your 3D data through Python scripts.
04:22
And I'm not familiar with using 3D CAD or 3D CD software. So I started to create 3D model using Python script. And I'm calling this method of 3D model creation as script modeling.
04:46
So let me introduce script modeling. Script modeling, if you do script modeling, you can create a 3D model even if you are not familiar with 3D CD or CAD software.
05:01
So it's very good for software engineer like me. And you can create shapes that are difficult for hand creation. And modifying shape is easy because as many programs, those kind of program has some parameter
05:23
to define the shape. So if you change such kind of parameter, you can change the resulting shape. So it's great and fantastic. So I'm so excited to start this project. And today's software, I'm going to talk about two software, Blender and OpenSCAP.
05:46
And it's free to use, so you can search your script modeling today. Okay, so let's start from Blender. So what is Blender? Blender is developed since 1995, so it's a little younger than Python.
06:04
And this is open software and multi platform, Windows, Mac, Linux. And this is developed by Shi, C++, and Python. And Python is used as API interface. And Blender has its own Python interpreter in the software.
06:23
So the latest version of Blender is 2.778. So it's including 3.5.1 Python. So you can use asyncio in the script. Yeah, okay, so this is a brief example of the Blender Python script.
06:45
This script consists of two parts. First part is the rating default object part. So if you run Blender, there are default object in the center. Cube and camera and light. So you have to, there is this kind of object before doing your job.
07:06
So the upper part is the rating default object. And this outcome method is doing the job. So this program is simply adding cone in the scene.
07:20
If you want to run your script in Blender, you can type this cone in your terminal. Blender space minus rajp space script name. And then if you run this cone, cone will appear. So it's a base script.
07:43
So because it's so basic script, it may be not interesting. So I'd like to introduce my past project. One project is a making chain. And this is a 3D printed chain. And this is originally made by NotMe, made by the others.
08:05
And this is amazing. This is interesting chain. And this is all 3D printed without assembling process. So when I sell this chain for the first time, it's so amazing, so impressive.
08:21
So about the chain, the length of chain is not strong. So maybe from 5 to 10 centimeters. So I want to create a longer one. So I started this project. And I have this printer called Afunio in my company. And Afunio is one of the most famous printer all over the world.
08:43
And this is Afunio bed size. Bed is the place which 3D printed project will be placed on. So the size of bed will define the maximum size of the 3D printed product. And when I think of making one chain, the shape of chain is important.
09:05
So I have some ideas like this spiral-based approach. So after thinking, spiral one is better in terms of space efficiency. So I use this idea. Then I created a Python program to create this kind of chain.
09:24
So it's very simple. You press one module, move it, rotate, move it, rotate, move it, rotate. So iterate this kind of chain process. And when I ran this script, I got this result.
09:41
So it's interesting, yeah, three circles. And of course, I 3D printed it. So I was a little excited to see it because it's like a kind of cake. So it's very good for me. And after taking support material, this began a chain.
10:04
And the length of a chain is about one meter. And after creating this chain, as I said, this is one meter. So I want to create more longer one because I like jumping rope. So my idea is to jump rope with this chain.
10:26
So I decided to create more longer one. So as I said, the good point of script modeling is it's easy to change parameters. So in this case, I changed only this number from 200 to 500.
10:45
So this is a printed one. So this chain's length is about 2.5 meters. And I have to take all support materials, and it took maybe eight hours.
11:04
And this is the result chain. And when I tried to jump in chain, this chain was broken with one chain. So sorry. Yeah, so this is a chain project. And the next project is Minecraft.
11:22
So maybe all of you know this software. And what I did is connecting Alborinda and Minecraft world using, of course, Python script. Specifically, I convert this kind of ordinary 3D data into 3D block data
11:46
and transport the 3D block data into Minecraft. So this software consists of two main parts. One is converting 3D model into blocks. So it's converting part.
12:01
And the other is transporting blocks into Minecraft. So transporting part. So regarding converting part is this. So left side shows the original model, and the right side shows converted model.
12:22
And there is relative conversion. So you can see the change in relative, 6, 7, 8, original, 3, 5, 6, 7. So yeah, this is the conversion part.
12:43
And regarding transporting part, I used MGPi module. And MGPi is Python module for Minecraft. And I used Minecraft mode server, which is called Spyot, embedded with Raspberry Juice plugin.
13:05
So after those implementation, I finally succeeded to send my face to Minecraft world. So success. I was so happy.
13:24
Thank you so much. And I tried so many times for testing. There are so many protein ways in my Minecraft world. And of course, this face consists of the normal Minecraft object.
13:43
You can dig the face, and of course, you can live in your face. That's fantastic, isn't it? And of course, I 3D printed it, but it's an old card, so I cannot understand where is my eye.
14:02
Okay, so the program this project is published in GitHub, so if you are interested in the project, please have a look. And this is a Blender project, and next I will talk about OpenSCAD.
14:21
So what is OpenSCAD? OpenSCAD is a CAD software, whereas Blender is 3D CG software. And this is also open source with GPL, and multiple from Windows, Mac, Linux. And this software is implemented by C++ with Qt framework.
14:43
And you can create 3D model using original programming language, which is a little similar to JavaScript, but it's not JavaScript. And there is no GUI to manipulate or create 3D data in this software. So if you want to manipulate 3D software using, sorry, if you manipulate your 3D data using this software, you have to write your script.
15:10
It's very interesting concept. And this is the screenshot of the software. Left side show the code, and right side show the shape created from the left side code.
15:27
And feature of OpenSCAD, it's very good for software engineer like me, so it's very simple concept. It's easy to understand. And the written script can be kicked from a command line, so you can
15:44
generate your model in server, or you can create multiple model with a single command. Just so cool. So let me introduce my past project. I've created this necktie. This necktie is composed of multiple characters.
16:03
And there is a bunch of name of my company's colleague. So there is many letters. And this is a 3D model. So when I think creation of this model, I have to create all alphabet.
16:27
So A to Z, like this. And there are four kind of modules, so I have to create four kind times 26 characters. So 104 model I have to create, like this.
16:45
So creating by hand is so annoying task, so I created this base module and applied this module to this script. So you can parse arguments from command line to OpenSCAD script.
17:09
So in this case, I passed the character information like A to OpenSCAD script. Then OpenSCAD will create the whole of the character in this script.
17:27
So it's very interesting. So OpenSCAD is so awesome software, I think. But writing OpenSCAD original script is a little hard,
17:42
because that language has no high functional syntax, or there is no class, or there is no object, there is no inheritance. So if you are trying to create some complicated object, it's a little difficult.
18:04
So I created a Python library, this Python library OpenPySCAD. So this library generates OpenSCAD code from Python code. I've already published this library to GitHub, so you can check it.
18:23
And I also registered to PyPI, so you can install this software, brp command. Okay, so let me introduce OpenPy SCAD. So if you want to apply a union operation, you write only this upper side, add operation.
18:47
Because I implemented them as operators, so you can use this operator. And then this is generated OpenSCAD code.
19:02
Yeah, it's very intuitive, I think. And different operation is the same, so you can use subtract operator to create different operation. And if you want to apply rotation, you will create two objects
19:22
and apply rotate method to the object. Then this OpenSCAD code will be generated. If you want to apply so many types of method, for example, rotate, scale, transform, union, difference, intersection to one object,
19:47
the next level is so high in OpenSCAD source code, so it's very hard to maintain, I think. So if you use this OpenPy SCAD script,
20:03
you will avoid such kind of high nested problem. So let's demo.
20:40
Okay, the left side is the screen of OpenSCAD,
20:43
and the right side is Python code. So first, import.
21:12
Okay, so if you run this script, you can see the cube. And if you want to add some cube to this field,
21:30
oh, it's so small. This is a union object. And I'm now using add operator,
21:41
and if you change this subtract operator, you will see subtracted object. And my library is holding debug method in OpenSCAD, so you can apply debug method and the subtracted object will see this kind of style.
22:04
Yeah. It's very intuitive, I think, and another example. Of course, this is a normal Python script, so you can create class. So in the class, I'm creating empty object
22:22
and add cube with translation. So if I run, oh, sorry. If I run this script, you will see this kind of shape. So this shape is not interesting, but you can apply this kind of approach
22:41
to use 3D model creation, I think. Okay, so back to try. Okay, so conclusion of my presentation.
23:01
Script modeling is fun, so let's start today. Okay, and finally, my company is hiring Python developer, C++ developer, front-end developer, and if you join my company, you can use 3D printer for free as you like. And we have international members from England,
23:25
Sweden, Germany, Estonia, and Australia. And we also have three Google developer experts, so we are very famous in Japan for the technology. So if you're interested in working in Japan
23:42
or working in my company, please talk to me later or see this job board. That's it, thanks.
24:00
Do you have any questions? Hello, thanks for your talk. It's great, and what do you use for scanning those faces? Because I guess this is scanned or modeled?
24:23
My face, you mean? Yes, and the others. I use the scanner, which is called Sense, provided by 3D systems. Okay. Yeah, thank you. Any more questions?
24:49
Thanks for your presentation. Really engaging, I think, and an interesting way maybe with engaging kids. I feel like a kid. I want to play with these things. One technical question.
25:02
Your OpenPy-SCAD library and your demo, are you actually saving it to a file? So you create a script, and at some point you said, blah, blah, blah, example.scad. So when you run it, it passes that file into OpenSCAD.
25:22
Is that the way it goes, or do you communicate directly with OpenSCAD? Regarding the function, OpenSCAD is watching the file change, so I'm just overwriting the file, then OpenSCAD detects the change of the file,
25:42
and reroute it. Okay, okay. Thank you. I've still got some time for questions. Anybody else? So why not rendering directly the STL file from the Python model?
26:06
Maybe as an extra option. Oh, sorry. Rendering the 3D object directly to the 3D representation to an STL object, or any other kind of 3D representation, instead of using the SCAD?
26:23
You mean, why am I using STL? Ah, okay. In my Minecraft project.
26:43
OpenPy SQL. So... You're reporting SCAD files? So, finally, I will export STL to 3D printed, but in this software,
27:06
I'm trying to do some prototyping on the screen. So, finally, I created that shape.
27:22
I want to export it to STL. Okay. Anybody else?
27:41
So, thank you very much.