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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Active rigid body objects fall through other passive rigid body objects

I am designing a Galton Board, so I have a group of marbles, which are active rigid bodies, and then I also have a bunch of rectangles, which the balls are supposed to hit and then veer off. And ...
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Why my rigid body act differently when I have small adjustments in simulation?

I have this simple rigid body cube simulation where the red cube is active while the rest of objects are passive when the simulation starts, this cube will roll all the way down, bounces and fall ...
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How close can blender simulations get to reality?

can blender be used to simulate the real forces that are present in a model and can it be used to optimize model shapes? i have tried looking for examples online but found nothing that is satisfactory....
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Operator bpy.ops.rigidbody.object_add.poll() failed, context is incorrect

Here's a simple code that works fine as far as the .blend file with the object I'm modifying is already open. ...
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1answer
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Simulating balls falling into a mesh. Why do I get different results each time?

So basically I've an array of about 700-800 spheres that will fall into a box. What I am trying to do is, after the balls settle they spell out something. I did that,by going to the last frame of the ...
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Rigid Body Problem [duplicate]

I have been trying to do Rigid body physics tutorials, and I keep running into the same issue. To show my problem, I did a basic cube with a basic sphere.I delete the top face of the cube. I add ...
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My simulation acts like there is an additional face [duplicate]

I deleted one face of a cube to make a box with an opening. But when I play the simulation, the objects act as if there is that face which I have deleted. Why is that?
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Why are some rigidbodies falling through passive objects and others are not?

I've been trying to simulate a chain falling onto a platform, but after I've applied active rigidbody modifiers to all links of the chain, and applying a passive rigidbody modifier to the mesh below, ...
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1answer
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How do I simulate a rotating, wobbling and falling spinning top…?

looking to physically simulate a spinning top in Blender. I'm a moderately experienced Blender user, but not very familiar with its physics systems. At the moment I have the (rigidbody) top spinning ...
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33 views

Rigid Body Simualation not working properly

When I place a cube upon another object(the rigid body type of the cube is active and the other object is passive), and start the animation, pressing Alt+A, the cube gets displaced as opposed to ...
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18 views

How can a automate the changing of hair length

How can I automate the length of hair particles to change during a simulation. For example have simulation run for 24 hours and then for the next 24 hours change the hair length and then run the ...
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Move object with rigid body physics enabled

I'm trying to move a car from a small surface down a ramp and then continue driving on the ground. I set the starting surface, the ramp and the ground to rigid body passive, the car itself to active. ...
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Bottles with balls inside - Physics Simulation [duplicate]

I want to create in blender a realistic physic simulation with bottles that have balls inside, first example is created Blender and the second in another 3D software. How to create this simulation in ...
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Bottles with balls inside - PHYSIC SIMULATION

I want to create in blender a realistic physic simulation with bottles that have balls inside, first example is created Blender and the second in another 3D software. How to create this simulation in ...
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1answer
40 views

How do you animate objects coming out of objects realistically?

I want to create some kind of monster, for a short animation. The creature should have a long claw hidden in its arm, that comes out when needed, a little like Wolverine. Modelling isn't the problem, ...
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If I don't have enough ram can I still bake my fluid simulation

If I have lats's say 8gb ram 6 gb is free but baking the fluid simulation will use 7gb would it be possible? Also if not are there any alternatives that I can use.
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My rigid body animation freezes after second frame

My animation records frames but the rigid bodies don't work after the second frame. Does anyone know how to solve this problem?
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Rigid body corners

I don't know how to call this problem but while I'm simulating rigid body physics I noticed that as the cube falls and hits the corner of a block (especially when the cube is high) it merge some part ...
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23 views

Blender objects pass through the ground

I was working on a Blender project on objects falling to the ground. I set the ground to "passive" and the objects to "active". After doing the simulation, I noticed how some of the objects just fall ...
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26 views

Transform locks cannot be applied with keyframes

I'm playing around with physics and rigid bodies and I'm trying to make the cube bounce and slide inside a room with rotating walls. Unfortunately, these doesn't work very well. As the cube falls and ...
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1answer
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Rigid Body Dynamic Animation Problem

I have been trying for way too long now to have a shape composed of a bunch of cubes struck by another larger rectangle type object. After surveying a ton of tutorials and the entirety of the ...
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1answer
32 views

Why my active rigid body objects not collide with passive rigid body objects

Why my active rigid body objects not collide with passive rigid body objects? I used rigid body for the hair and I want it to collide with the body,so I make some collider.I set the collider as ...
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17 views

Rigid Body Simulation Problem Ball Is Not Entering The Bowl, stopping In Air [duplicate]

I am trying to make this ball enter the bowl but it is stopping midway, like there is an invisible surface.
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1answer
50 views

There is a way to instance two rigid body objects with hinge constraint between then using AN?

I want to make several instances (clones) of a simple rigid body setup: two rigid bodies linked with a hinge constraint. Each one of the instances need to bend by the hinge in its proper individual ...
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1answer
49 views

Blender Collision Simulation Data

Is it possible to access data from a collision, such as point of collision and impact force? I am trying to simulate a "drop test" in Blender and cannot figure out how to access the information. As of ...
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Intersecting problem with rigid bodies

There is a mechanism shown in the figure_1; a rotating gear interacts with a grip. There is no problem (figure_2) until I change the grip shape with the same setting as previous, where the model ...
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1answer
23 views

How to change the timing of the rigid body falling

I'm using blender 2.79b which is fantastic, I'm a student and I'm learning the software by myself and I had a problem about the timing of the body falling using rigid body. How can I change the ...
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3answers
254 views

Set a camera to free fall like a Rigid Body?

I want to capture freely falling objects from their reference frame. i.e. to have the camera freely falling due to gravity in the exact same manner. Is there a simple way to make a camera free fall ...
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34 views

Rigid body objects interact with armature bone?

Is it possible in Blender to create an object (human + armature), rig it and make it to interact with other rigid body objects?
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2answers
46 views

Rigid body physic simulation error?

I want to create an animation with a ball that hits a lot of boxes. The movement of ball must happen in a few fractions of a second > 5 frames: here is my blend file v2.8, same bug in blender 2.79 ...
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31 views

How to create this animation and make it dynamic to interact with rigid body - spline wrap?

I want to create in blender an animation similar with this one: I am wondering how could I do and if it is possible to interact with rigid body objects?
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Do we need corrective shape for shoulder deformation when arm stretch?

I am having problem with shoulder deformation. I understand that I can use corrective shape. But, I wonder if we really need too. Any tip would be highly appreciated. Thank you.
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1answer
60 views

How Can I define rigid plane?

I want to pour cubes which are in the image. However when I animate blender p plane passing through to the cubes. How can I solve this problem? I just want to pour cubes and observe falling of cubes ...
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1answer
28 views

What is the correct measurement systems for animation?

In animation, which scale or measure system should I use? For example, If I model an entire room and plan on having a character moving about in it, should all the assets and character be done to real ...
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1answer
34 views

Baked the duplicate of rigid body object

I simply create a simple simulation of a monkey (suzanne) falling on top of a grid. Now i just want to make a copy (duplicate) of the monkey and i want to bake the simulation of that copy. So i will ...
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1answer
68 views

Rigid Body Object Jumps back when keyframing “animation” off

I am trying to get a box to float into the air, fly in a direction and then midair activate physics so that it flies off and falls to the ground without me having to animate that. I tried keyframing ...
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1answer
124 views

How to improve the accuracy for a rigid bodies

How can I keep the objects from intersecting or passing through one another in rigid body simulations? I have checked the normals applied all transforms for scale, position and rotation set Origin > ...
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19 views

How to deal with complex simulation in Blender?

I have a model made of several pieces. Let's say a spaceship. Every single piece is an active rigid body. The model is hit by another animated object, also rigid body. The problem is that the ...
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20 views

If I bring another character into the scene with the character, hair rigid body is released

If I use append to import a Y character into a scene that has a Z character, there is a problem that the rigid body of the Y character's hair are released. How should I solve it? On the contrary, if ...
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1answer
582 views

Where are the Rigid Body Tools in Blender 2.8

I'm looking for the Rigid Body Tools that used to be accessible on the Tool Shelf in Blender up to 2.79. Since the removal of the shelf, I can't seem to find it in Blender 2.8 anymore. Here's the menu ...
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1answer
29 views

Objects pass through their moving container's walls during rigid body physics

I want to create an animation using rigid body physics, but I encounter this problem..., the objects pass trough the wall... What settings should I apply? I checked the normals, the scale, object ...
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3answers
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Can I make animated body interact with rigid body object

If anyone knows about this please help, I'm trying to make this rigged robot knock over a piles of rigid body blocks. Is their any way to do so? I have tried to make the arm a rigid body but then it ...
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2answers
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Rigidbody container is spilling out contained rigidbodies

I am trying to make a simulation where I have a container and it is getting filled with more rigid bodies (Soccerballs) falling from above. The container gets filled fine but when I try to animate the ...
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1answer
24 views

rigid body simulation not rendered correctly

I would like to replace objects at the end of a rigid body simulation by a another object. But the final scene contains the old ones, even when I call obj.hide=True ...
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29 views

How can you enable a rigid body world for a given scene in 2.8?

I want to create a rigid body world for a given scene, and I know that it can be done via bpy.ops.rigidbody.world_add(), which adds a rigid body world to the active ...
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1answer
68 views

How do you enabled rigid body physics for a given object in Blender 2.8?

I'd like to enable the rigid body settings for a set of objects, and I don't want to use bpy.ops.rigid_body.object_add(). I see that objects have the property ...
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14 views

Animation: Control Impulse directly

Is there a way to control the impulse of a rigid body directly? The Motor actuator would be nice, however you have to specify a target speed. Is there any way to control the applied impulse, and not ...
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press the Play button, and the hair mesh floats in the air

I am following the hair physics tutorial. Place the bones and mesh next to the hair, press the Play button, and the hair mesh floats in the air. I have not entered a keyframe. This is the 2.78 ...
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1answer
38 views

Filling box-like object with random objects

I'm generating training data for a machine learning model using Blender. I want to train an RGB->RGB-D model on images of boxes that are filled with random objects. How would I automatically fill a ...
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1answer
128 views

Rigid Body Problem - objects not colliding

I am trying to complete BlenderGuru's Quick Rigid Body Fun tutorial, but keep getting stuck when trying to add Rigid Body to the chain. My top chain link stays in mid-air, while the rest fall and ...