Questions tagged [physics]

Questions pertaining to Blender's internal physics or the Game Engine physics.

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Using Blender with cell fracture and trying to add collision via Python

Using Blender with cell fracture I have created a code that should select the objects created by cell fracture and give them the collision attribute and it does but only one out of a 1000. So it doesn'...
3
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1answer
2k views

Mechanical Simulations With Real-Time Physics [duplicate]

So, I know this is probably something that would better fit with a full-blown CAD program, but I love Blender, and I know Blender is capable of this sort of thing, I just don't know how to go about it....
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1answer
305 views

Physics Simulation - Objects going through one another

I am doing a physics simulation and I am running into some trouble with meshes partially going through one another. I am simulating physics using constraints. I am simulating an anchor being reeled in....
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1answer
2k views

How to get fragments of an exploded object to react more accurately to collisions with a plane?

Since a picture (or animated GIF in this case) is worth a thousand words, I will begin by providing an example of the problem I am trying to solve: As you can see, the fragments of the monkey never ...
6
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1answer
1k views

Reel in anchor using physics

I want to animate an anchor being pulled in by a motor on the boat. The anchor is attached to some chains. I am having trouble with the physics. I am using the built in physics system, not the Blender ...
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2answers
473 views

Smoke Domains in Blender

When doing the fire simulation within Blender Render can the smoke domain be anything other than a cube, such as sphere or other mesh?
8
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1answer
4k views

How to stretch a mesh object over another?

Let's say that I want to make, say, a tarp stretched over some objects (like some tools covered down on a military jeep) or a snake stretched around it's prey (I'm a horrible person, I know :P) or ...
5
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2answers
2k views

Simulate sound waves (physics)?

Can Blender be used to simulate the transmission of sound waves through a medium (most likely air)? What kind of additional scripting, if any, would be needed to actually render the collisions as ...
5
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3answers
9k views

How to make small objects fall properly with rigid body?

I have a bunch of dominos set up in my scene. I want them to tip each other over(aka the domino effect). However, they're not falling realistically. They're falling way to slow. My dominos are ...
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0answers
848 views

Modelling metal deformation properly

I'm looking for tips on how to realistically model metal deformation in blender. I would like to have ability to "fasten" a metal plate with virtual "screws" on a frame. Then I want to simulate an ...
2
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1answer
2k views

In Blender 3d, how do I start or change a wind force in a scene?

Some force fields, such as "turbulence" can be moved or changed. But wind is one of those that does not seem to have any handles for controlling it with key frames. Its just on all the time, and the ...
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1answer
2k views

How To Make A Solid Object Drop To The Ground Like It Was Liquid

So I have a simple bouncing ball animation, but I just wanted to something "weird" for the ending. Is there a way to change the ball's material on the fly, where after the last bounce it changes ...
4
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1answer
5k views

How do I Attach a Rigid Body to a Bone?

I'm trying to make rigid body physics interact with an (Armature-)animated character. For starters, I created a short piece of chain falling onto an animated box. The chain consists of 5 individual ...
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4answers
15k views

Physics are not simulated past a certain frame?

I've set up the physics of a swinging wrecking ball and set the animation to run for 240 frames. This was not long enough for the entire "swing" of the ball-and-chain. I'm unable to reset the ...
2
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0answers
585 views

Using Physic tab in 2.68 to make swinging linked-chain--problem with “weight” and chain-links that snap

How do i strengthen the bonds/material in a plain linked-loop chain, in a non-kinematic chain--ie using "hard body" setting in the physics tab! these bonds behave strangely and break every time... I'...
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2answers
9k views

how do I make an object bend or break if hit with sufficient force?

How can I make a Ridged body simulation mesh so that it's solid under normal conditions, but if a heavy object collides with it, it bends as the force is transferred? (i.e. like a ball through glass ...
2
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1answer
644 views

Warp time with rigid body physics?

Is it possible to warp time (slow time down, speed time up) with rigid body physics?
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1answer
2k views

How to create snow particle physics?

Image 1: Image 2: Any help or thoughts would be awesome!
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2answers
9k views

unexpected reactions in a quiet simple rigidbody physics simulation

Try the following scenario: scene: Add a cube; add a UVsphere; move sphere on X axis until less than half sphere intersects the cube. make a duplicate of sphere; apply boolean on cube (difference ...
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2answers
2k views

How to exit animation mode when using physics

This is a very basic question. I'm using tutorials to learn how to use physics in Blender. I made a cube and lifted it above a plane and clicked Alt-A to run the animation and let the cube fall. How ...
4
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1answer
3k views

Is it possible to float an object on a fluid simulation?

This question is related to Physics cross-simulation interactions?. Is it possible to make an object float/interact with a fluid simulation? It doesn't have to be full two way interaction, but I ...
6
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1answer
4k views

Why do fractured parts act like an explosion?

In the following we are testing cell fracturing applied to a UV-sphere (remeshed to blocks, BTW). We then apply rigidbody physics to the generated parts. When we start simulation as you can see ...
11
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2answers
8k views

How to bake multiple fluid simulations in one scene?

If we understood correctly, Blender does not allow more than one domain for fluid simulation in a given scene. This means that any inflow (fluid) object will be transformed into only one domain object ...
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2answers
1k views

How to constrain rigid bodies to an axis?

In the game engine there is an option to constrain rigid body translations and rotations on an axis: Is it possible to do this with the 3D view rigid body physics system?
3
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1answer
299 views

Get smoke simulation to observe emitter's pose? [closed]

Right now I am making a model of a wind elemental in blender, and was trying to use the smoke simulation to make a small whirlwind that swirls around its main body. However, the smoke simulation ...
12
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1answer
9k views

How to correct collision between particles

In the use particle system how to avoid two particles intersect each other as in the following figure: Our settings for ...
14
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1answer
3k views

Why does fluid (water) stick to the top of an obstacle?

In our simulation, Fluid (water) drops on an obstacle and splashes. It mostly works fine, but there is noticeable part which remains on top of the obstacle! In reality, there should be no water there, ...
8
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1answer
2k views

How to exclude objects from cloth's collision?

I have a bed in a room with lots of objects. I'd like to put a sheet over the bed by simulating the sheet as cloth falling over the bed (which has collision enabled). Problem is, I have many other ...
14
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1answer
2k views

How to attach colors (e.g., gradient color) to fluid particles

This is follow up question based on {this post}, indeed. The question is how to attach color attribute to fluid particles? For example when a part of colored fluid (as explained {here}) ...
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1answer
4k views

Exporting (bullet) collision shapes

I'm writing a scene exporter from blender to a format to be used by a game. I need to be able to export physics information the game needs, mainly the collision shape of every object (either the one ...
26
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1answer
3k views

Is it possible to simulate an egg?

Is it possible to simulate an egg? Specifically, I was wondering how to handle simulating the yolk. I was thinking fluid simulation, but it seems you can't a specify different viscosity for ...
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2answers
2k views

How to simulate engines spraying a fluid?

You know an aircraft engine? The gigantic fans on the sides of the aeroplane? Well, there will be seven of those in a circle facing to where the powder comes out and it will spray a liquid onto it. ...
12
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1answer
3k views

How can I simulate powder with a particle system?

I want to simulate powder, are particles the best job for this and if so what settings could I use to achieve this in Blender?
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1answer
3k views

Settings to fill an open container with objects

I am trying to create a natural arrangement of rubber thimbles in a jar. What is the easiest method of doing this? I've tried various settings with the jar being passive and using the various ...
27
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3answers
24k views

How can I add motion to a rigid body?

I'm trying to create a bowling animation and I want the ball to hit the pins. I already added the Rigid Body physics to the objects but can't get the ball to move. Obviously I could just add ...
5
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1answer
465 views

Curve guide on linked object

I am linking in a rigged character to another file. But I cannot seem to get the "Curve Guide" physics to work for the hair of the character. Some bones of the rig controls some empties that in turn ...
2
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1answer
4k views

Cloth simulation not animated in 3D Viewport [closed]

I'm following this tutorial, and came to the step where I start the physics simulation for a piece of cloth dropping on an object (11:25 on video); When I press the "play" animation button, the cloth ...
3
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1answer
1k views

Is there a way to shrink particles to mesh surface?

I attempted to create a dripping effect like this: On a curved surface using this technique, however the long particles don't conform to the surface, looking very unrealistic (it looks particularly ...
11
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1answer
3k views

Is it possible to create a fluid simulation of rain?

Is it possible to simulate rain with the fluid simulator? I tried to do something with a bunch of Inflow cubes that get enabled and disabled, however this is very tedious. Is there a better way? I ...
6
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1answer
937 views

Rigid body simulation always has a visible collision space

Every time I use the rigid body tools I have a visible space between the passive object and the active object, even when I set the collision margin to very small or zero. Any suggestions?
20
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4answers
21k views

Is there a way to make particles behave like rigid body objects?

I want to create a scene that has a lot of irregularly shaped objects piled up on the ground. I don't want the objects to intersect with eachother. I started off by creating a particle system that ...
6
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1answer
3k views

Why do the objects in this rigid body simulation rotate too slowly?

I was attempting to simulate a bowling ball impacting a set of pins, however the pins just slide away instead of going flying like they should: As you can see, the origins are in the correct place. ...
10
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3answers
2k views

How can I bake the physics cache of linked objects?

Imagine you have a rig that consists on bones and everything, and that in that setup you also include curve objects to do some physics simulation. All these rig objects would be part of a group for ...
8
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1answer
2k views

Exporting to Collada: Physics don't get exported

I added basic rigidbody characteristics to a default sphere in Blender and exported it to Collada but the physics information isn't exporting. How can I get the physics data to be exported along the ...
3
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3answers
3k views

How do you stretch and then release a soft body or cloth so it springs back like elastic?

I have a soft body mesh and an armature. I have one bone holding one end of the Soft body and another bone used to stretch the soft body. I then want one of the bones to let go of the soft body so it ...
4
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1answer
702 views

Building a Conveyor

How would I build a Conveyor like this in blender? Thanks
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1answer
2k views

Calculating acceleration or velocity of a point on a rigid body?

I have a rigid body simulation involving a solid body. It is a simple simulation with a box shape on a plane. The plane is slid out from under the box so it falls due to gravity. Due to friction ...
7
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1answer
3k views

Rigid body animation with constraints and relationships

I want to drop a Padlock object that not only bounces the main body of the lock but has an open lock that also swivels when it hits. I can't do this with a parent child relationship since it isn't ...
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1answer
890 views

Locking an object's pivot point in game engine

In the game engine, how do you lock an object's translation while letting it freely rotate? I've got a record with grooves, with random noise added to all vertices in the z direction. The needle/arm ...
18
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5answers
28k views

Tips for making Mesh Rigid-body collision shapes more stable

Using the Mesh option in Properties > Physics > Rigid Body > Rigid Body collisions as the collision shape often makes the simulation unstable (objects jittering, falling through other objects, flying ...