Questions tagged [rigidbody]

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19 views

why dosen't the motor constraint work properly?

I made a simple car with physics and rigid body constraints. The car can go downhill, but I wanted it to go uphill. so I added a motor constraint with an angular velocity of an inpulse of 10 and a max ...
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24 views

Rigid bodies being affected by bone constraints

I am having and issue with rigid body physics. I have a main object that acts as a collision, and four objects around the first that have constraints that attach them to the first. I also have an ...
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1answer
18 views

Rigid body following path

I'm trying to make a rigid body sphere follow a path while it rests on another rigid body, which I'm tilting in different directions in order to balance the sphere, but I'm not having much success ...
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1answer
21 views

Rigid body bounces away when starting animation

I'm trying to create an animation in which a ball is placed on a plane which I'll then animate by rotating it in different directions. However, as soon as I check the "Animation" box under ...
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1answer
18 views

Rigid Body and directional constraints

I would like to be able to 'push' multiple Rigid Body objects up along Z-axis (using another Rigid Body). The trick is that they must only move on the Z. And once pushing force is gone the objects ...
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12 views

Show Convex Hull Collision in the viewport

Like in the title, is there any way I can see the Convex Hull mesh when I enable the rigid body on an object? I can see sphere, box, cone and all the primitives, but convex hull nada. Seems like quite ...
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25 views

Can you return a boolean variable when a stack of rigid bodies fall?

How to check whether the stack of rigid bodies collapses or not. When there is a collision with a rigid plane my Python program will return a boolean variable. The above picture is the simulation I ...
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11 views

How to position the empty of the motor constraint for the platform to go upwards?

How do you position the motor constraint (empty) to make the platform go upward? Currently, there is a motor rigid body constraint between the cube in the background and the platform. The cube is set ...
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21 views

Cell Fracture Geometry Issue

I'm trying to cell fracture a mesh of a mask and running into some unintended results that i would like to fix. When i cell fracture the mesh I am getting strange pieces that are extruded. I am not ...
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2answers
110 views

Rigid body animation problems (coin pusher animation)

Im trying to make a coin pusher animation with rigid bodies in Blender. I have a few problems. The 5 coins on the 'pusher' itself dont fall down. They stay on the same level. They dont join and ...
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1answer
26 views

mesh collision rigid bodies acting very strange. (bouncing, shaking, etc…)

I am currently using blender version 2.92.2, and I am making a simple rube Goldberg physics simulation, however, for some of my objects I will need to use rigid bodies that have mesh collision instead ...
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13 views

Edit Presets in Calculate Mass

In the documentation for Rigid Body physics we are told "There are many useful presets available from the menu..." However, I find many of them are not so useful or are completely redundant. ...
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23 views

Riging problem. When i try to bend the knee, it doesn't bend, it splits in two pieces

I have a problem trying to rig a leg. It works perfectly with the arms and any other thing i tried the Armature tool on. I have used a cylinder for the leg and scaled it in the Y direction for the ...
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1answer
24 views

Rigid body physicis is resetting my object location

I've got a scene where I'm trying to get a cube, to travel at high speed and collide with another cube, I'll call them cubeA and cubeB. I animated cubeA to start far off in the distance, away from my ...
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1answer
17 views

Rigid Body Unbalanced Weights

I have not seen a post about this on BSE yet. Is there a way to create a rigid body simulation with two connected objects with different weights? Think of a hammer or a mace. Naturally, the heaviest ...
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1answer
19 views

adjust rigid body objects' position without affecting the whole shape

I made a logo animation using a rigid body but do not like how the blocks are spread. Moving the blocks one by one did not work because the new position affects how they are gathered together at the ...
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0answers
18 views

Add rigid body physics for an object with a modifier and keyframe

It is possible in blender to add rigid body physics for objects that have modifiers and are keyframed? Now the left object doesn't interact with the right object... Even if I check "Animated&...
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1answer
31 views

Physics in tracked scenes, not working

I've already made plenty of Blender physics simulations in my life but when i try physics in a camera tracked scene, literally nothing happens. Always. All setup is the same as in other scenes but ...
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1answer
21 views

Rigid body bursting and clustering

I'm trying to make a logo animation of it crashing down to cubes. Even though I followed a tutorial (https://www.youtube.com/watch?v=XNDO2xvUHtc), I have a different result..... 1st problem: I copied ...
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1answer
46 views

Rigid Body Physics - Can't Transform or move mesh when applied

I am relatively new to blender and 3D modelling and have decided to try my first animation. I wanted to make a chain swing slightly and have followed numerous tutorials using rigid body physics, ...
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13 views

Collision physics. Rotating object constantly hitting coffee beans in a grinder or roaster

I would like to make a collision with a spinning object in a coffee roaster/grinder and the coffe beans being roasted/grinded. I have tried with rigid body physics and collision physics, without any ...
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1answer
25 views

Why is my rigidbody broken?

Both rigid bodies have mesh collisions.
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0answers
34 views

Rigid Body 'Start Deactivated' not working?

so I made this animation where a circle is expanding and should hit the rocks floating around it. The circle has a torus around it which is parented to the rest so it follows. I made the rock pieces a ...
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2answers
40 views

rigid body not rotating after collision

I was trying to recreate a bowling alley in Blender 2.90. The YouTuber "Default Cube" made a series of 3 episodes on YouTube where he showed how he did it so I watched the videos and tried ...
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1answer
41 views

Why does my RigidBody jump weirdly in the begining of the animation?

As soon as the animation starts the top of the box weirdly jumps or wiggles, depending on wheter Mesh or Convex is selected. Here is the download of my project
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1answer
15 views

object shrinks whenever I give it rigidbody physics

I am trying to make this helmet that you see here below, interact with the ground using rigidbody physics. However, when I give it an active rigidbody and push play on the animation, the object ...
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0answers
44 views

How to Make a Rigid Body Car in Blender

I am making a car with blender and I want the car to ride with rigid bodies. I already have the wheels and they are all moving and reacting to slopes but now I want them to connect to the rest of the ...
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58 views

Object>>rigid body>calculate mass: mass estimates are bit out on shape created using Maths Mesh tool

I was hoping to use Blender to calculate the mass of shapes with curved surfaces. To start I took a 1m cube and performed a boolean difference with a parabolic curve (x=0 to 1m)that was extended ...
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0answers
16 views

Aligning the meshes of two scanned fragments of a 16th centruy wooden altar piece for glue joint analysis

I am working with photogrammetric 3D models in the restoration of wooden cultural heritage. I use the digital 3D models to analyse the gluing surfaces of two fragments of a wooden altar piece from the ...
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2answers
173 views

An object inside in another object with physics properties - rigid body

I am trying to create a physics simulation, but I not succeed... What settings should I use for rigid body if I want to create an object inside in another object with physics properties (rigid body) ...
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1answer
65 views

Why do rigidbodies snap back when keying “animated”?

I know this question has been asked before, but no one has properly answered it. I am trying to animate two rigid bodies on a curve to hit each other at a certain point, but upon keying "Animated&...
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0answers
36 views

How to make a rope that doesn't stretch

I have a rope made out of a plane and cloth sim. One end is just pinned to hang in the air and the other is attached to an empty which then I can move around the scene to see the way rope interacts ...
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2answers
50 views

why chain not fall on the ground?

With the chain as active and ground as passive created rigid body. Why the chain unable to drop on the floor. Chain is going through the mesh. Any suggestion whats going wrong
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0answers
17 views

I have two objects, and want one to be cell fractured at the beginning and the other after some time

I made an animation in which the sad characters head falls down and breaks into pieces, and then his body is shattered to the ground, but when I cell fracture them, they both break at the same time, ...
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22 views

How to calculate volume of a mesh object

With the 3D print addon. Under Rigid Body -> Mass i have put the value of 5Kg. And Under object -> Rigid Body -> Calculate mass with a custom i have change value to 7200 (cast iron) as ...
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1answer
60 views

Bounciness in Rigid Body

I tried to make up a rigid body simulation (a torus falling onto a plane) and I have tried to modify the bounciness from 0 up to 400, but I didn't observe any difference. What this parameter is ...
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0answers
22 views

I want to place the rigidy body object in a circle

If i copy an object set as a box in a rigid body using spin in edit mode, it will not be copied in a normal form. Is there a way to replicate normally using spin? Or is there another way?
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0answers
48 views

Cannot move array of objects

I tried to create an array of these mini figurines and then separate them so that they can be moved individually. I applied rigid body settings to one of the figurines, setting it as active and copied ...
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1answer
60 views

How to make a rigid body go up?

I have 2 cubes, I want them to collide with one “falling” upward and the other downward, i tried to make the mass -1 but it set it to 0.001kg and not -1. How can I make it “fall” upwards
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1answer
64 views

Rigid Body Simulations never work- everything flies in random directions

I am so confused. I try to make a simple rigid body animation. There is one piece in the middle which rotates and some other parts are connected to it and should move if the rotation is taking place. ...
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0answers
142 views

Speed up rigid body simulation baking?

I'm making train simulations using rigid bodies and I would like to bake them more quickly so I can tweak parameters more efficiently than before. Is it possible to force blender to use parallel ...
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2answers
37 views

Bugs with Animation of tank. Blender 2.83 stl

Well, I'm trying to do a tank like in this tutorial :https://youtu.be/q5fjslhomsI 1.There are often bugs with metric system. It just doesn't work properly that good! C'mon I have to make stiffness ...
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1answer
86 views

Can't move Mesh with Armature

I have read a lot of treads with the same problem. And I think I have tried to make everything. But Can't still get it to work. I'm new to Blender. Working in Blender 2.90.1 I have made a character ...
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1answer
133 views

How to freeze a falling rigid body animation for good?

What I've been trying to do is to make a simple bowl in which candies fall using the the rigid body animations for both. But after say certain key frames I want it to be the final(or rather the ...
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27 views

can I have a fluid react to a rigid body?

I was messing around in blender and made a small course where a box drops onto a ramp and slides down in and then it hits a ground plane and hits some water, but I can't get the water to react to the ...
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48 views

Active rigid object not following the animation movement of other rigid object

I've created a conveyor belt out of single links using an Array modifier and then a curve modifier to get a conveyor shape. Additionally I've added a keyframe animation on the Y coordinate with a ...
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0answers
14 views

Uniform rigid body constraints

is threre any way to connect a lot of pieces (like fragments form cell fracture) together with rigid body constraints uniformly? When you normally use connect, its just connects all fragments to the ...
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1answer
37 views

Could someone find any logic in the rigid body world and rigid body constraints behavior?

I have a scene where I'm trying to find a logic for better understanding of rigid body world and rigid body constraints regularity. The setup seems work as I expected, but when I move the "Vert&...
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1answer
27 views

rigidbodies not working with a lot of objects

i have added a lot of objects with rigidbodies but some rigidbody objects are not working. i think its happening because there are a lot of objects : /. i have tried searching on web but i didnt found ...
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1answer
40 views

Part of Object Goes Through Plane When Falls

I am using Blender 2.81a and just doing a Domino Animation. But faced a little problem. When the last domino falls, it kinda goes inside the plane and the comes out. But I don't want that go through. ...