Questions tagged [collision]

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55 views

How do I make a squeezed balloon?

Is there a scientific way to have a balloon squeezed as if between two planes (or in a vise)? In other words, have the sphere maintain its volume while it is deformed between two parallel planes? [...
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1answer
937 views

Making particles collide with each other? Possible? (2.8)

So I have made what is essentially an asteroid field. I did this by making half a dozen asteroid models, and then making a large cube with a couple of ‘volume’ emitters that run for a single frame. ...
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34 views

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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0answers
79 views

Trigger particle emission on collision with another particle system

I have a particle system A whose particles have been already emitted. Now when these particles collide with Particle Emitter B, I want B to start emitting particles. How should I go about doing this?...
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1answer
1k views

Rigid Body Mesh Collisions: Objects falling through each other

I have a scene that I need to run simulations on, and quite a few of the collision shapes need to be set to mesh. This works fine for most objects but there are some that are acting weird, basically ...
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319 views

Smoke/Liquid Ignoring collision object during simulation

I’m fairly new to Blender and modeling in general, and I’m running into trouble with running simulations (smoke, fire, liquid, etc). I’m trying to produce simulations to be used in a projection ...
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1answer
80 views

Is there anyway to make particles have an influence area around them that will let them collide, without having to turn them into rigid bodies?

I want to make a particle simulation, however, is there any way to set a sphere as a child and then set an "influence radius" around each particle as like a collision box? I know you can set them to ...
2
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1answer
230 views

How to propel an object, rotating freely in zero gravity, towards a collision with a fixed plane?

I downloaded a model of an astronaut from the NASA website, and I'm trying to create an animation with it to import into a Premiere video project, but I'm just a beginner at Blender and am having some ...
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72 views

Origin Points (and Colliders) Not Moving with Armature

I don't know if this has already been addressed elsewhere, but I couldn't seem to find any information on this issue. I'm trying to make a chain of rigid bodies using bones and empty axis(s) with ...
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0answers
226 views

A Soft body (Nurbs Circle curve) collides with a Plane but doesn't do it with Cube & other objects

The case is this: A soft body (Nurbs Circle curve) falls on the floor and on one more object. The floor is a Plane mesh, the object is a Cube mesh. Collision physics is enabled for both. The soft ...
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1k views

collision between RB and softbody objects?

I have been trying to get a wrecking ball to collide with an upright slab of jello, with no success so far. I've tried so many combinations of physics attributes that I can't remember them all, but ...
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310 views

Prevent particles from growing through primitives

For a static scene I've modelled grass on a plane using the particle system's hair type. Now I want to place some objects on the grassy plane, some of which are rather small in height. Unfortunately, ...
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0answers
1k views

How to prevent hair particles from going through the mesh

How can I prevent hair strands from going through the mesh in other way than using force field so the outcome is like A or B shown on the picture? I've tried using collision with hair dynamics but ...
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0answers
403 views

Smoke simulation collision distance padding

I am simulating smoke around building rubble. I have the buildings set as smoke collision objects. However, the smoke seems to leave a huge collision padding around my objects. The buildings are to ...
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1answer
148 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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2answers
101 views

How to achieve pressing against invisible wall effect facing camera? (animation)

i'm quite new to blender. I'm making some animations and i would like to reproduce this effect Not only for the tongue,any part of the body ( hand/foot/derrière/chest ) To resume ,a character ...
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2answers
1k views

Collision/Rigid body objects not moving an inch

I'm trying to make arrows fall onto a table, in order to dispose of them on the table randomly. So I enable collision/rigid body on the table, passive mode, and add collision/rigid body on an arrow, ...
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1answer
79 views

Cloth physics do not work with collision

I have a simple model, a ball going through a basketball net. I want to have the mesh collide with the ball as it goes through but whatever settings I try I cant get the ball to collide with the mesh ...
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1answer
71 views

How to make an object only collides with the terrain?

I have a question to the the collision in the Blender Game Engine. I made an character (a simple sphere). This character is on layer 2. A empty object is on layer 1. This empty spawns every 5 seconds ...
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1answer
86 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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1answer
88 views

Ranining Cubes to form shape

This is the .blend file I'm working with I created this model with a processing sketch that translated colors into volumes. Now I'd like to have a rain of cubes, having the cubes to land in their ...
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1answer
114 views

Simulating an egg on a conveyor belt getting smashed

I have a short animation of an egg shape (solid w/o liquid) and the egg is on a conveyor belt (follows directional movement of belt via driver) then was supposed to have the egg get smashed by a large ...
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2answers
983 views

Smoke constrained by objects

I have a smoke emitter that is under a rocket (but not touching anything). It emits smoke, but the smoke just sits there in a bubble. It doesn't flow. If I move the emitter away from the collision ...
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2answers
1k views

how to make 2 cloths collide with each other?

I'm having a problem with a cloth simulation. I've set 2 planes up and applied a cloth modifier to each, what I want to happen is for the two cloths to fall together and interact with each other. The ...
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2answers
4k views

Particles fall through collision object

I am trying to make leaves fall on the ground but the leaves are intersecting the ground. This is the collision floor seen from under: The object has collision enabled and Particle Damping to the ...
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1answer
3k views

Stop hair from falling through emitter mesh

I have a simple sphere with a hair particle system on it. When I add hair dynamics, the hair simply falls through the mesh. I would like the hair to fall around the mesh and collide with it (both ...
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1answer
74 views

Why does my Mantaflow waterwheel not work?

Apologies if this doesn't light correctly, I omitted the HDRI I was using to save space for upload and download of the .blend. Plug in your HDRI of choice and the scene should look fine (or turn off ...
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1answer
112 views

How to make objects not pass through each other?

I have a field with plants, and some plant's leaves are cross over with each other. How do I add collision/or is there any other way to solve this problem? I need that effect, cause I'm creating a ...
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1answer
229 views

Animation with Physics (Cloth | Collision)

Problem How can I make the fabric stop exactly where the tube thickens and prevent it from continuing its free fall to infinity and beyond Example I want the fabric to stop exactly when it reaches ...
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1answer
54 views

Apply collision event only on a specific mesh

I've been using Blender Cycle render for over an year and never done any game engine... This morning I looked a tutorial how to make an object move and after that I wanted to experiment a bit. I did ...
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1answer
71 views

How to exclude smoke from collision mesh

I am trying to achieve an effect where I drive an invisible cone through a simple smoke domain, which clears the smoke from the cone-shaped region. I'm planning to make the cone invisible by disabling ...
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1answer
47 views

Soft body collisions give missing cache error

Sounds like I'm having the same issue as this question (Missing cache error) but since that has no answers, I figured I'd post this question with a working example of my issue. I have a bunch of ...
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1answer
72 views

How do I achieve a bending effect with the collision of two rectangles?

I am trying my best to re-word the problem I am having. I have 3 objects bounded on top of each other. I will call that square 1. I have duplicated square 1. The duplicated object is named square 2. ...
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1answer
1k views

Objects and physics not being rendered

I was working on a scene with 2 groups of particles that were supposed to collide with an object. I set the physics on the "collision object" to collision, in the preview the particles did collide, ...
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1answer
1k views

Soft Body Object-Collision Object Interaction Not Working

Thanks in advance to this wonderful community that has helped me a ton on the way. With that preface, here is my problem. I am trying to get the most basic of simulation to work correctly. The top ...
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1answer
383 views

I want the Cloth to drape over the cup, but It creates gap between them

Can someone tell me why this happens? I created a plane, subdivided it to 50, and smoothed it, and went to the physics, and clicked on cloth, then selected the cup, saucer and plane and went to ...
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1answer
394 views

How to make particles collide on face instead of median point?

I made a scene where particles collide with a plane, but the particles seem to collide on their median point: i want it to collide with their faces, so their faces don't go through the plane... is ...
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2answers
2k views

Cloth physics/clipping

I've added physics to my objects but the cloth clips on the cube's edges. Why is that? https://gfycat.com/GoodIcyAustraliancurlew
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2answers
499 views

Particle Collision Object for some particles but not others?

Newb here. I have particles coming from two different emitters inside a sphere. I want the particles from one emitter to collide with the sphere, staying inside it, but I want the particles from the ...
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1answer
605 views

Issue with Collision Detection

I am not sure if I am doing something wrong or there is an issue with the Collision sensor. I have a sensor embedded on the floor, with 2 objects that are moving over it. If the two objects pass ...
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1answer
311 views

How do I prevent cloth from being blown through an object?

After creating a dress and a hangar, I have given the dress cloth properties and set the collision properties for the dress and the hangar. If I just leave everything as is, the dress hangs from the ...
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1answer
443 views

Collision bounds for 2D Sprites in the Blender Game Engine

How can I make Collision bounds for 2D sprites in the BGE? (The 2D sprite I am trying to make collision bounds for is the image I attached below). I imported the 2D sprites as planes with the "Import ...
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2answers
1k views

Particles don't collide with rigid bodies

I have a scene with 2 Cubes, Cube 1 (using a soft body (Rigid body doesn't work either))falls through Cube 2, and Cube 2 has a particle system on it. I want Cube 1 to "push away" the particles on Cube ...
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1answer
322 views

Why do particles escape from the tube?

I am very new to blender and only started in February this year and I currently got stuck with a very specific problem. I am doing a project where I want to have bubbles inside a glass tube. I did ...
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1answer
1k views

How to wrap an object around a cloth and “squeeze” the cloth, like a napkin ring or rag on a jar

You know the way you'll sometimes see someone with a rag tied over a jar? I tried to make this effect with a jar and a ring (torus) where the cloth falls over the top of the jar (this part works ...
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0answers
34 views

Understanding what “dependency cycle” means, why it happens, and if it is a cause of concern [MWE provided with cloth]

I am using Blender 2.82a. My code seems to be working but creates "Dependency Cycle" messages from the command line, so I hope to understand why they are happening and if they are a cause of concern. ...
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0answers
21 views

How can I reduce the friction of Mantaflow colliding with effectors?

Just experimenting with liquids in Blender (I’ve only just got into doing fluid sims). Finished this tutorial and did some experiments of my own with collision effectors, such as some whiskey dropping ...
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0answers
25 views

Some particles go straight through collision objects

As the title says, some particles don't seem to be effected by an object with collision enabled on it at all. I found a couple threads on this, but they were all really old, and the things suggested ...
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0answers
24 views

Rigged Cloth, Collision not working

I have created three cloths using bones and none of them will collide. Self Collide is on and the torso part does have collision physic enabled and I have played around with the sliders to no avail. ...
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1answer
32 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 ...