[2.8] Tutorial: 3D Programming with Python and Blender for Physics Simulations

[@Olav3D]

Cool Add-ons for Blender: Human Generator: bit.ly/3rBjJXy Massive Cars And Vehicles Add-On: bit.ly/3cuWF8N 1100 Textures in Blender: bit.ly/2QEJ7yN Flip Fluids Simulation Addon: bit.ly/2Pbu5QR HDRI Maker Addon: bit.ly/3stHdPR Using these links help fund all the free tutorials.

[@ArtPomelo]

Yes, more coding tutorials with blender please.

[@CryptoAnimated]

Hi, If I may, not trying to be critical, but I assume some of the people don't know about programming, and it may help to write clear code, instead of counter = 0, if this is the position of x, just call position_of_x, in this way the code becomes more clear in my opinion. I've changed the first part a bit to show as example The same thing when you subtract -2 from the counters, this may confuse people as well, you can add the position after the loop is done, in this way you don't need to subtract. Nonetheless, thanks for introducing programming in blender for me, I'm a developer and I'm just starting out in blender import bpy number_of_cubes = 2 x_pos = 0 y_pos = 0 z_pos = 0 for i in range(number_of_cubes): y_pos = 0 for j in range(number_of_cubes): z_pos = 0 for k in range(number_of_cubes): bpy.ops.mesh.primitive_cube_add(enter_editmode=False, location=(z_pos, y_pos, x_pos)) z_pos += 2 y_pos+=2 x_pos+=2

[@Adinkya]

Wow, noice

[@swainuk2024]

thank you :)

[@CryptoAnimated]

@@swainuk2024 You are welcome, I am posting some content on unity and games if you are interested

[@chrislyonm]

@@CryptoAnimated This made SO much more sense. Still thankful that he took the time to make this though.

[@CryptoAnimated]

@@chrislyonm Yeah, I loved the tutorial, I added this just because I saw that people not familliar to programming would suffer a bit

[@vain3d973]

As a beginner who never uses script, this just reminds me how powerful Blender actually is 🤯... As always, super helpful tutorial Olav3D, thank you!!!

[@blenderenthusiast]

I'm a beginner to blender and this video was like my starting point, THANK YOU!!!

[@Adinkya]

Gl

[@DJCronixx]

For a more concise way of specifying the nested loops, you can use something like this: list_of_coordinate_tuples = [ (x,y,z) for x in range(0, count_x, size) for y in range(0, count_y, size) for z in range(0, count_z, size) ] Great tutorial btw!

[@todlu]

So you can nest for loops INSIDE the list comprehension?! how cool is that!

[@canopus-lab]

I'm still using blender 2.79! But I always watch your tutorials, Thanks !

[@Napert]

Why no asmr tag in the title like wtf

[@jaimerojas6578]

lol so good right?

[@IRaul]

it sounds like agressive asmr

[@Chillerll]

@@1islam1 At first, I thought those were time stamps and Allah really loves to add and subtract from numbers in for-loops for some reason

[@lpanebr]

I love it. The tip to create it modify using blender and copy the code is perfect! Thanks

[@Roboticdock]

Very nice demonstration of “for” loops in 3D modeling! Thanks!

[@JackPillawa]

the voice is super relaxing and the Tutorial very good, thanks

[@gizlikullanc4861]

Instead of using additional variables like counter, counter2 etc. you can use the values of a, b, c. for a in range(1, number + 1): print(a*2) See that the values of a are equal to corresponding values of counter :)

[@gizlikullanc4861]

I believe this is doing the same job: import bpy number = 10 for a in range(number): for b in range(number): for c in range(number): bpy.ops.mesh.primitive_cube_add(size=2, location=(a*2, b*2, c*2))

[@Olav3D]

Yup. There are many ways to shorten that script, I wanted to make it as understandable as possible as it is a beginner tutorial.

[@Mahm00dM0hanad]

This is my first time I watch scripting tutorial on blender well done 👍🏻

[@diggie8372]

This coding tutorial is more suitable for me Please do more tutorial... Thanks a lot for sharing this.

[@cse077mukulrana]

I just subscribe you really amazing I was searching fir stuff like this finally I found your channel 🙃

[@guylemay1471]

Thank you for this most useful tutorial ...I've been waiting for one just like it for awhile now - thank you again!!!

[@nickhodgskin]

Duuuuuuude, I just stumbled across this. Such a good find, thank you!!

[@bronzekoala9141]

The creation of the cubes can be made more then 100x faster by re-using the already existing mesh of a single cube and not using operators in the loop (every bpy.ops call refreshes the scene, making it very slow). We just create one Cube at the start of the script and re-use it's data in the loop. At the end, we just delete the first cube. Like this: import bpy counter = 0 bpy.ops.mesh.primitive_cube_add() # create a "source cube" cube = bpy.context.object for a in range(10): counter +=2 counter2 = 0 for b in range(10): counter2 +=2 counter3=0 for c in range(10): new_cube = bpy.data.objects.new(name="New Light", object_data=cube.data) # create a new Object and lets it use the cubes mesh data bpy.context.view_layer.active_layer_collection.collection.objects.link(new_cube) # add the new object to the viewlayer new_cube.location =(counter3+2, counter2-2, counter-2) counter3+=2 bpy.ops.object.delete(use_global=False, confirm=False) # delete the "source cube" With this changes, the execution time goes down from 15 seconds for a 10x10x10 grid to almost instantaniously on my PC.

[@sennabullet]

Thank you for this incredible tutorial. I learned a ton. Thank you for taking the time to make the video and share your knowledge.

[@merwyn2087]

Your tutorials are just amazing !!! I love wath you do.

[@ghostriley22]

i would suggest adding denoiser....you can get satisfactory results without needing to bump the samples to large values

[@voxsideres]

Why not use the enumerate() function on your for loops? Ex: for counter, a in enumerate(range(0, number): .... I don't know how it affects performance but it prevents having a lot of extra variables in your global scope. Great tutorial!

[@EvandroMeloz]

Great tutorial, Batman.

[@fmenezes6272]

thanks for increasing the font size in this tutorial

[@copypaste3526]

import bpy num = 10 step = 2 for i in range(0, num, step): for j in range(0, num, step): for k in range(0, num, step): bpy.ops.mesh.primitive_cube_add(size=2, location=(i, j, k))

[@rixyarbrough1702]

This is an awesome tutorial! I learned a ton, thanks :D

[@Myrslokstok]

Awesome 😃 this kind of thing makes me happy. You should allso do one video with an imported object of irregular shape.

[@4shC]

i am so unlucky for not finding this sooner... Great tutorial btw

[@ricopin]

Thanks! I wanted to play around with scripting in blender, so this gave me some important pointers!

[@JaaoPonte]

This tutorial is just amazing! So simple and so instructive

[@iammanishverma]

Very well explained!!

[@melegaunt01x]

Excellent Video! Thank you! I subscribed!

[@erik....]

You can also change the interface scale in Properties so that everything is easier to see in videos. I use scale 1.3 on my 4k screen.

[@JohnSmith-rn3vl]

Loving this.... definitely interested in more programming tutorials .

[@ldandco]

Cool videos, subscribed

[@JacobTekiela]

would be super if you made the text size even bigger or zoomed in

[@luxraider5384]

at 4:01 shouldn't you make the counter3+=2 before the cube generation because the cube here doesn't match the coordinate system of the system and we see that the last cube has a weird coordinate of (20,18,18) and therefore it isn't even a cube it's just a rectange with a 20x18x18 parallelepiped

[@JannisAdmek]

is a great coding tutorial for sure but I think an array modifier is still faster :)

[@Olav3D]

Jannis Adamek That’s why my channel has both ;)

[@chainonsmanquants1630]

really good tutorials out there ! Thanks a lot !

[@simulify8726]

Please do a tutorial on quick character creation

[@celestialbody9807]

Nice work ! I loved this tutorial, thanks for it ! 😄

[@saucedplanet5968]

Great tutorial!

[@serra_edoardo]

Awesome tutorial! Just a question, is Blender physics simulation realistic? Meaning that it yealds the same results that an experiment in real life would. Thank you a lot

[@massivetree7937]

Running some of these scripts are taking quite a while to execute in the final release of 2.8. Generating the initial cube array of 1000 cubes takes just under a minute to generate which seems very slow for a scene consisting of only 6,000 faces.

[@Olav3D]

What takes time is adding the physics actually.

[@massivetree7937]

@@Olav3Dwell in the case I'm referring to was just adding the array of cubes. I was just surprised, figured it would be faster.

[@nelsonsubervi-hernandez8197]

Hello, thanks for your tutorials but for sake of my eyesight I kindly ask you to increase the font size to between 16px or 18px thanks you very much.

[@Olav3D]

I agree, the font size is increased in later tutorials.

[@cmulation5460]

There is no Steps per second parameter in Blender 2.9, there is Substeps per frame instead. I set Substeps Per Frame to 1 and baked, otherwise it takes an enormously long time and cubes move away too far and too fast.

[@arnavjha7375]

In my case , cubes are moving up in air and are stick to each other . Just reverse of of actual output I was expecting .

[@ElectroGamesYT]

Cool tutorial, can u make more tutorials on python I need to learn

[@machbauer132]

Why not switching immediately to the "Scripting"-Tab? ;) But what makes me wonder too, why does it take so much computational power to generate 1000 cubes??

[@phadadev2307]

Thank you so much. :) :) :)

[@yashwantsahu4069]

Sir i want to make video in physics in which we use light rays simulation

[@thehulk6866]

How much time it takes to render this animation ??

[@AngelAgudoGuerrero]

Yes! Great tuto!

[@ravenxrgaming4672]

Can I use blender for rover simulations

[@prateekthakur1848]

I hear that voice and I sub.

[@종신-l3i]

thanks for video. and i have a little problem. my ground moves down with the cubes at same time... so my question is, how I could make my ground stay..?

Well done,thanks!

[@clown786]

Can I download an old version of Blender and use Python on it?

[@Martin-ll7jc]

Thank you, much appreciated

[@RushWrap24]

i realy love what you do but can you do a video how to make the Minecraft realistic physics simulation. and i subed

[@vishalsingh-cz8jq]

awesome!!

[@4.0.4]

Isn't there a way to set the same settings for all objects without python? Since generating all of them could be done with the array modifier, for instance.

[@Olav3D]

This is to learn to use python in Blender, of course you can do it with a modifier ect.

[@3d-illusions]

Cool, thanks. I was wondering though, how could we multithread this on the cpu, or run it in parallel on the gpu using something like numba?

[@keluargamabar]

From blender, Could the simulation convert to become desktop based or Web based app?

[@sams_3d_stuff]

uhuh, thank you so much!

[@samnomas2739]

I feel like I’m being seduced. The information is winning me over, not gonna lie

[@vynguyenchi9672]

Great!

[@indranupaperproducts4186]

is it common that when script starts running,then the software stops responding for a long time??well my pc has only 2gb ram with no graphics card in it

[@allthingslegal1294]

Hey man, new subscriber. Just wanted to ask which laptop you use for rendering and animation. Thanks

[@muzikermammoth3995]

hi there, i tried replacing the 2m blocks with 0.2m meter block of mass 0.2, but the blocks just shoot out like an explosion instead of falling. Why does it do that?

[@muzikermammoth3995]

Turns out the convex hull detection for the objects means objects that are originally intersecting get pushed outwards because they're considered to be colliding

[@varunahlawat9013]

Could even the sound be simulated? Technically it should be possible I think...

[@ItsHxwi]

How often do animators code

[@artaway6647]

cool tutorial. But idk why blender always freeze when I press ctrl+c to copy the cube object from the info window.

[@alpha_6t9]

why is the final structure asymmetric? (since all the cubes are identical, the object that is falling has to be completely symmetric. if so, why do the cubes on one side, the side we are observing, fall off while the ones on the other sides don't?) (good tutorial btw)

[@Olav3D]

My first thought: as “steps per second” increases the level of asymmetry will decrease as the accuracy of the baked simulation increases. Good question!

[@alpha_6t9]

@@Olav3D I was thinking in the direction of numerical inaccuracies in binary representation of numbers

[@mathyoooo2]

@@alpha_6t9 I was also thinking of floating point errors

[@rahul_siloniya]

Which gpu are you using

[@sansdomicileconnu]

thanks for this tuto

[@chasenwang4597]

My render view is completely dark grey. I don't know what to do...

[@rfpcs1]

Why didn't you use EEVEE?

[@cipherxen2]

What added the randomness to the physics model? No cubes would have fallen out in a perfect model.

[@Olav3D]

I think “steps per second” plays a part.

[@cipherxen2]

@@Olav3D If one cube is exactly above another cube, their collision cannot make them move horizontally. But as shown in video, the middle cubes move horizontally after collision. If the cubes are perfectly aligned above one another, they would have stayed in place.

[@cipherxen2]

I've created my own physics simulator, in which I've to add some slight randomness in position to them behave like in this video.

[@chasenwang4597]

What GPU do you have?

[@martinbassoli8876]

Hi!, How I can apply this script to an object I already create it , like a tree that falls into a house and the roof of the house breaks . I wanna know that because it would be great to add it to my scene.

[@jisankumar3420]

I can't see number row 5 plss write for me

[@rachittrivedi6322]

Nice one...

[@sippy_cups]

Is there a github with the code from your videos?

[@mayadah]

Hi, I have a problem with the animation, that is, the plane and the cube move with each other and the cube does not fall on the plane

[@ManfredPichler]

Make sure you set the rigid body on the plane to passive, otherwise the plane will have gravity and start falling the moment you play the simulation.

[@mayadah]

@@ManfredPichler thank you

[@maicomcoelholopes9032]

Olav, poderia me ajudar?estou criando um Addon(tentando) mas estou com dificuldade de vincular parte do script com um botão(nesse caso UI menu) e como posso executar vários comandos com apenas um botão? exemplo: com um clique mover objeto a determinada coordenada e aplicar um modificador como o solidify com apenas um botão?

[@MrRoach-ii4pz]

Great tutorials! Thanks!

[@WhiteBossGamerYT]

nice bro

[@aumhren3480]

04:44 - this code crashes blender (2.91.0), anyway thx for sharing

[@vericanackova597]

cool

[@xXSniperProgamerXxHdxxLPXxXx]

And why should this script be faster than the array modifier?

[@Olav3D]

Once you have the script written you can make changes to the simulation much faster. Using array modifiers you will have to start over to make adjustments to the number of objects on each axis due to origin points, physics and the applied modifiers.

[@フジ子-k3i]

print("THANK YOU"!!)

[@daisuki9296]

Invalid syntax

[@ArbitraryOnslaught]

I thought png was larger file then jpg? also great tutorial!

[@jascrandom9855]

It is, but its lossless.

[@Vinironin]

my plane is not fix lol, how do i fix it?

[@Vinironin]

ok now all the boxes are passing through the plane

[@ehehjehehe5673]

I will continue using modifiers

[@Olav3D]

Haha, I have a tutorial for that too ;)

[@georgekariuki8614]

Hi Olav,great tutorials since blender really upped their game! Quick question,I am stuck on a small animation experiment for moving teeth models. Can I kindly reach you on email?

[@r2hthacker459]

NEXT VIDEO a small realistic island with no-high poly PLEASE SIR !

[@lello7385]

you just create the cubes in python and add the physics then you run it from blender not from python.

[@mohammedissam3651]

🤩

[@sohaibahmad9030]

Can anybody tell is it compulsory to use coding on blender?

[@simongunkel7457]

What do you want to use blender for? For most use cases you won't need to code anything, but for some specific things you might want to do so. Think of the ability to use the python API as a bonus - not neccessary for most tasks, but an option to expand functionality even further.

[@sohaibahmad9030]

@@simongunkel7457 for animation. Ok i got that, thanks.