Questions tagged [rigid-body-simulation]

Questions pertaining to Blender's built-in rigid body physics simulator and rigid body simulations in the Blender game engine. Rigid body physics are used to accurately calculate dynamic motion of non-deforming objects.

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Objects are slippery - how to increase the friction

I want to put a pile of books in my scene. Since I want the books to lay in a realistic way, I'm using physics to let them laydown in an automatic way. When I animate the books, they have a strange ...
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Why does the parent go haywire, when the child's rigid body physics is set to “animated”?

Backstory: Hey, I simulated a rollover-crash using rigid body physics. To top it all off, I wanted to smash one of the windows after the crash, using the fracture modifier. All objects of the car ...
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18 views

Exploding an object by parts

Hi I have imported an engine model in blender, I want to explode the complete engine part wise(PFA).there are so-many parts i cant keep moving all of them it will take lot of time. so is there any ...
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What is the force strength measurement unit?

I am just curious what measurement units does blender use for the force filed strength. An old site mentioned that Wind filed for example uses Newtons. Which is not the case in blender 2.8.2. I tried ...
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Active object falls only through parts of the other active object

i have these red cylinders that should slide into these slots. It works great in the middle of the object with the slots. But at both ends the red cylinders keep falling through the slots and land on ...
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How do I completely turn rigid body physics on and off?

I have scene in which I want several different physics objects to appear above a bowl and drop into it. In my scene I have the objects set to kinematic and non visible and then when I want them to ...
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1answer
26 views

Beginner question: Collision is not working

I'm a total beginner and just finished the famous donut tutorial. Now I've started with my first own project and facing a problem that I cannot solve. I modeled a light bulb and would like to fill ...
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Rigid body anim not showing in render

So I'm 6 hours into rendering and I have noticed that I cant see the cube explode as shown in the pictures. Please help, I need this done by Tuesday.
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Rigid Body Constraints. Parent to another object

Is it possible to have active simulation while our setup is parented to an object? And it needs to take that object movement into the simulation. Imagine a part of an armor of Samurai, I like to ...
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1answer
17 views

How can I get an object to swing from a hinge faster?

I have an object that I want to swing like a pendulum and come to a halt rather quickly. I have it swinging the way I want, it is just going really slow and would take probably 3000 frames to finally ...
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A rigid body sim where at the end all objects textures make out a picture?

Im not sure how to explain this, I've seen the effect done online multiple times. For example, a bunch of balls simulated to fall on the ground, and once they settle if you look at the top of them ...
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how to work with dynamics and animated objecs

I want to drop several objects into a jar one by one, not all at the same time. How can I achieve this? I tried to hold objects with another passive rigid body and then animate that object away ...
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Rigid body objects not interacting with animated deforming mesh

I am new to using physics simulations in Blender, and I am having trouble setting up a rigid body physics with an armature deformed mesh in the scene. Basically, I have an animated mesh of a fridge ...
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Deformable rigid-bodies

So as the title implies I would like to now how to create and use deformable rigid bodies. Someone did just that. https://www.youtube.com/watch?v=3T-QapG7vAE This is what I would like to achieve. The ...
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simulation cache playback

my question is how to make blender refreshes viewport playback cache every time when the timeline starts from the beginning, say i have 250 frame, everytime it plays all the 250 frames and jump back ...
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29 views

Gas flow through effectors

I've been attempting to make a rocket engine simulation, and I'm currently on the basic stages, where I'm trying to get fire and smoke to flow out of a nozzle adhering to the physical properties of ...
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Rigid Body Character influence limbs when falling

I have the animation and setup for a VFX shoot. I now want the limbs, so arms and legs to point up. How can i influence the animation that they will point up? The animated checkbox is not what i want....
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22 views

Simulating and visualising arbitrary curvature flows in Blender - Is it possible?

I would like to simulate the evolution of surfaces under various different curvature flows e.g. mean and gauss among others. I have a background in Mathematics and have ran basic simulations before ...
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Keeping Rigid Body Fracture Objects visible up until they turn into fluid

Hey I'm trying to simulate a fractured cube falling, and when it makes impact with the ground I want it to become fluid, keeping the pieces velocity. Im using Flip Fluids. I have it all setup, but I ...
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rigidbody spheres acting weirdly and stopping?

I'm trying to make a 'marble run' sort of simulation, and I have around 12 spheres that run down a track. They fall down a splitter to two different sides. but for some reason, the spheres on the ...
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1answer
32 views

Friction with balls rolling down a funnel

I have made a funnel with some balls that are set to move sideways to begin with. Once they hit the funnel, they immediately stop and roll towards the centre. They seem unwilling to roll in the funnel ...
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17 views

Is there a limit to objects included in a rigid body constraint?

I have an empty that is connecting multiple objects, with wheels that turn, and I need more than two object options to make the rigid body move the way I want. It's basically a car that hits a wall ...
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1answer
20 views

Rigid Body Physics Rolling Ball Won't Come to a Stop

I want to simulate a squash ball / golf ball sized sphere rolling down a ramp onto a plane then coming to a stop due to friction. The plane should be like carpet in terms of drag. However, even with ...
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1answer
23 views

Animation with different objects moving together?

I have an object who has multiple parts with different modifiers. I don't want to apply the modifiers. Is there a possibility to connect the the different parts, so that when I animate the whole ...
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How to simulate vector sound waves in Blender?

I am making an animation where I visualize audio in the form of a vector sound wave. I am trying to make this "wave" with a line of stretched cylinders. The goal is to make waves that look like this ...
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1answer
25 views

Selective collision with particles

I have two collision objects and two particle systems. I want P1 to interact with collision 1 P2 to interact with collision 2 Can you help me to achieve that ? Now both are interacting with ...
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1answer
49 views

Animated displacement of rigid body does not collide with other rigid bodies

I am playing with rigid bodies in 2.79 and I'm having the following problem. I have subdivided a plane a few times, then added subsurface and displace modifiers. I animated the displacement with a ...
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1answer
122 views

How to twist a cloth?

I am starting to get pretty stressed and sad. This is for a mobile game I have accepted a project for and if can't solve this I might have to drop this project which will cost me a bit. So if you ...
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how to make all objects rigid bodies animated? [duplicate]

I'm am using the cell fracture add-on and I need the fractures to wait before falling, and I don't want to select each one and change them individually.
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26 views

how can I make and animate projectiles with strings attached to them?

I want to create an animation for taser darts firing but I can't quite figure out how to create the wires attached to the darts. I've tried using cloth and soft bodies on both paths and mesh edges ...
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1answer
21 views

How do I get rigidbody physics + constraints to interact with a mesh animated with an armature?

In my scene I have 4 "cards" and 1 "stick". The cards are connected to the eachother and the stick with point constraints: https://streamable.com/jtglq They are interacting correctly on their own. I ...
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Physics simulation won't run until the last frame of the timeline [duplicate]

I am making a rigid body physics simulation. It started out ending at 250 frames, but I later changed it to 400 frames. The problem occurs when the whole animation stops at the 251st frame. Is there ...
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23 views

Connect cloth object with rigid body

Im trying to simulate a fabric which bonds 2 rigid bodies. I want the cloth to keep the rigid bodies "connected" but i need the cloth to be affected (namely to be stretched) by the rigid bodies as ...
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How could I create realistic structure simulations in blender? [closed]

I have this projects in which i need to build a structure that has 2 levels(each level being 1 floor). Each level must hold a golf ball while the structure is shaken. My materials are straws, tape, ...
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Using “Rigid Body” for rolling ball. Flat surface. How to push the ball to roll? [duplicate]

Think of billiards. With some force, a ball can roll on a flat surface. When I had asked a question about calculating rotation for a rolling ball, someone wrote an answer that I should use Rigid Body. ...
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24 views

Can Ridged Bodies from Blender animation remain after animation loops in Unity?

I have created a keyframe animation in Blender for a pistol firing. The shell cases eject and at the apex of their ejection, a ridged body is applied that uses the trajectory to finish off the motion. ...
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25 views

How to use spring constraint on a moving object?

I’m trying to animate a bike that will be going over rough terrain, and I want the rider’s body to react with physics. I’m trying to use the “generic spring” rigid body constraint, but whenever I use ...
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Issue with soft body physics - balloon string

I'm trying to implement what this answer is suggesting: softbody simulation, attached to another soft body, copy location constraint, I've followed those instructions. I need it to be a particle as ...
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14 views

Calculating fluid inflow to a rigid body

I have a fluid simulation that has an inflow object whose position in the scene is calculated by the rigid body simulator. Now what I want is the fluid in the simulation to continue to come from the ...
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I made a chain that has rigid body but the chain disconnects

This picture tells everything. They were supposed to be linked and they actually are but somehow magically disconnects through the mesh. It seems that it occurs when it happens when enough force is ...
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29 views

Rigid body physics based pulley in blender?

Hi I want to make a simple physics based pulley with two rigid body objects, so that when the heavier object moves (via physics) it pulls the other object over the pulley. I don't need the 'rope' ...
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1answer
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2.8 Rigid Body settings and how to use?

Thanks in advance for any help on this. Just playing around with Rigid Body behavior based off/extended from this tutorial, https://www.youtube.com/watch?v=-4uFt0m5I-U I keep tweaking and tweaking ...
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98 views

Documentation on the mathematical models used by Blender physics engines

I need to know which mathematical models Blender uses during rigid body simulation and fluid simulation (e.g. Lattice Boltzmann). Is there something like that in the Blender manual or do I need to ...
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1answer
67 views

White material shows up as gray regardless of lighting

i have just finished Blender Guru's rigid body simulation video and was looking to texture and render it, but i have encountered an issue with adding a white material and having it show up as an ...
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Blender 2.81 - How can an Active mesh interact with a Passive mesh without the Active mesh bouncing away from the Passive mesh?

For example, I modelled this picture frame. A bolt is used to hang the picture no problem. But when I apply the "Active" physics to the frame and the "Passive" physics to the bolt, the frame just ...
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Why does adding a particle system to an active rigid body object stop the simulation from playing?

So I have a fairly simple rigid body simulation going on. Shooting 3 spheres at a constrained model shed. I want to create particles for the moment each sphere hits and exits the shed. First sphere -...
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Keyframe won't execute during replay

In an animation have entered a keyframe that unlocks the Z-location of a rigid body object half-way the animation. At that point, the object should start free falling. When I click on a frame before ...
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Attributing “active” type to object during animation

An object is suspended above a plane. Halfway the animation I want it to suddenly become an "active" body, so that it drops down under the influence of gravity, ending with bouncing on the plane. ...
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Why do the origins of Explosion particles change when I render the image?

When I look at the Explosion particles in the view port they are exactly where I want them (Top picture), however when I render the image the origins of the particles seem to change as in the lower ...
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29 views

Blender software architecture/algorithm technical documentation?

I love Blender and am curious to learn about the behind-the-scenes software architecture and algorithms used in this big piece of software. I know that there is plenty of Blender user documentation, ...

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