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Questions tagged [collision]

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10
votes
3answers
4k views

Soft body to Soft body collision

Is it possible to have two (or more) Soft body objects collide in Blender? I have tried enabling self-collision, but distinct objects don't seem to interact with each other at all.
8
votes
1answer
3k views

How do i create low lying smoke (similar to Zootopia), in blender

Hello Blender community, I am a huge fan of the Disney movie Zootopia, the amount of physics and detail really drew me into 3D animation and design. Although I always had an interest in 3D ...
7
votes
1answer
661 views

Boids avoid collision?

Im trying to make a flock of birds in a massive cage using boids. But they keep flying through the walls. How do I tell them to stay in the cage?
7
votes
1answer
946 views

make soft bodies stay inside another soft body

I have a cube, with a transparent surface, and make it a soft body and drop it. It's transparent because in it are some red balls. How do I set it up so that the red balls inside the cube bounce ...
7
votes
1answer
427 views

How can I prevent boid particles from intersecting?

I'm currently doing some proof-of-concept work for a Lego-style music video with a rock band on a stage in front of an audience. My idea was to use boid particles to simulate the crowd but I'm already ...
6
votes
1answer
910 views

What causes this weird collision?

Pretty sure that there is some answer to this already somewhere since it seems such a basic action. But I could not find an answer to it. Maybe since I just started with Blender, I just don't know the ...
6
votes
1answer
763 views

How to render LINE particles in cycles render?

I'm really struggling in visualizing line particles using cycles render... I'm trying to visualize shortwave solar radiation in a city by using the LINE option (see figure) in the particle properties....
6
votes
0answers
82 views

How do you avoid dependency cycle between two soft bodies?

How do you setup two softbodies with collisions without getting a dependency cycle ? A depends on B through Softbody Collision B depends on A through Softbody Collision Those two objects interact ...
5
votes
2answers
252 views

How to push a box with physics engine by another object?

I want to push a box by an animated character in Blender 2.8. First I tried to animate the box by keyframes but this looks very unnatural. I think this will look ...
5
votes
1answer
576 views

How to make skin reacting to touch

When you punch someone, skin will deform, same if you squeez your leg or other body part. I want this effect, because i'm making animation concentrated on interaction between characters. I tried to do ...
4
votes
1answer
3k views

Soft body and collision don't work

I am beginner in Blender. When I try to make a bouncing ball (UV sphere marked as "soft body") on the Plane (mark as collision), sometimes the ball falls through the plane. Or when it works ...
4
votes
1answer
347 views

How to ensure accurate rigid body simulation with many small objects

I am attempting to fill a cup with small capsules to create the effect of sprinkles sitting in a bowl. To do this, I have been using rigid body simulations to pour the sprinkles into the cup and then ...
4
votes
1answer
2k views

Cloth collision with an object

I have two chairs, a cloth piece falling on it and then a helmet falling above the cloth on one of the chairs. Whatever the setting I'm trying I cannot get the helmet fall nicely on the chair and ...
4
votes
1answer
859 views

How to get the physics engine to wraps a string around the moving part of a motor constraint?

I'm trying to simulate the physics of a string that wraps around a motor spool when the motor turns. The body of the motor and the shaft+spool defines a motor constraint, so a velocity can be applied ...
4
votes
1answer
959 views

How, specifically, does the game engines friction work?

I have a dynamic physics-typed object. Its material has an option for the amount of friction: Here is what it tells us: Well, refer to the first picture. We see, ...
3
votes
2answers
161 views

Glowing/outline effect when particle and object are colliding

How to do a glow/outline of collision effect when particles (objects with same size in a group) are entering other object? For example when a small box particle is falling into a plane (will fall ...
3
votes
2answers
103 views

Building a Chess Board with Particles

I'd like to create an animation of squares falling down (1) to form a chess board. The squares would be falling in sequence and once at field level a chess part will emerge from it resizing from 0% ...
3
votes
2answers
383 views

Squeezing shape by another one

I'm trying to simulate the growth of a cancer in the blood vessels in Blender 2.78c. Firstly, I created the network of blood vessels using this addon. Then, I created a simulation of the cancer with ...
3
votes
1answer
122 views

How to make an (open) object behave like rubber when penetrated by another

So uh i've got this problem with a penetrating object and another object that serves as something like a condom if you will So what I want, is for the penetrating object to not deform while moving ...
3
votes
2answers
7k views

How do I stop hair particles going through the body and the head?

Target : I intend to have long lady hair that go swirling in the wind. I am trying to achieve that through hair dynamics. Problem: Hair are going through mesh(body and head). I am using blender 2....
3
votes
1answer
84 views

Soft body friction

I want to create in blender a scene like this one, attached here. I have a past in cinema 4d, there was very easy to create this. I tried in blender in this way: I create a soft body sphere and a ...
3
votes
1answer
134 views

Detect two objects colliding, and write the frame number when collision happened

Yes, I know it is similar to this question, but I want further explanation. I would like to detect two objects colliding, and write the frame number if on that frame the collision happened. Collision ...
3
votes
1answer
139 views

Rigid bodies collision of a piston inside a shell

I am trying to simulate with the piston constraint by putting the rigid body piston into another rigid body shell such that they can work as a piston mechanism. However, the piston inside the shell is ...
3
votes
1answer
263 views

Molecular particles keep sinking down

using the Molecular script with a particle emitter to form a pile of spheres. The behavior so far is great however the particles keep sinking in to touch the floor (collier) like this. How to make ...
3
votes
1answer
510 views

why is my smoke blocky?

Hi all, i am basically creating a tunnel of smoke in blender 2.77, cycles. i have a flat ring mesh with a vortex underneath, and i have also added a cylinder on the outside (collision object) with a ...
3
votes
1answer
2k views

Skirt collision with body

Been working with Blender for about 2+ weeks. I know this sort of question has been asked a lot but I've been struggling for a week now, trying different things to the point where I don't know what I'...
3
votes
1answer
108 views

Stop player from climbing mountains

I want to create an open world FPS game with the BGE. Is there an option with character motion that allows the player to only walk on ground that is (for example) less steep than 10°? I don't want to ...
3
votes
1answer
416 views

Is it possible to make a car with this kind of functional axle?

I was trying to make a car and make the axle "work" mechanically. My idea was to make an axle with a flat end and a wheel that would enclose around it like this: Only, when I give these objects rigid ...
3
votes
0answers
42 views

Collision Object for particle system

The hair you see in the picture is created with a particle system on a vertex group. The hat is a separate object. Is there any way to make the hat a collision object so that the hair stops when it ...
3
votes
0answers
60 views

Solve Burr Puzzles in Blender?

There is a great software called BurrTools for the automated solving of burr puzzles, it is however sometimes a little bit cumbersome to work with. I do not think that there is any equal function ...
3
votes
0answers
187 views

Rotate object when colliding

I have a question regarding collisions in blender. I'm trying to animate shortwave radiation (particle system) which reflects on different materials. However when i apply a collision the 'solar ...
3
votes
0answers
192 views

Calculate collision point of rigid body in BGE

I have a sphere (active rigid body) that bounces on a plane (passive rigid body) and afterwards hits another plane (passive rigid body). I would like to get its coordinates when it hits the second ...
2
votes
1answer
425 views

How to have multiple soft bodies in a single object?

I want to use soft body physics on a human character. It means breasts physics is different than butt, thighs or belly. Is there any way to apply multiple soft bodies on single object? Like vertex ...
2
votes
1answer
154 views

Create a shower hose with correct physics

I'm making a shower hose that follows the handle when it moves. I've created it successfully following THIS tutorial, but the hose is too "elasticy". I'm wondering which settings I should change (...
2
votes
2answers
547 views

Rigid bodies not colliding when going fast

I have a scene with (what will be) a treasure map and am trying to animate some coins falling onto it. I started based on this tutorial https://www.youtube.com/watch?v=iYL9w6xsZ6g made a coin, ...
2
votes
1answer
169 views

cloth draped on a mirrored mesh: how to do it properly?

I had an interesting experience draping cloth over a mesh. The mesh was a biped, x axis mirrored. The mesh was given the Collision attribute, however... the cloth draped correctly over the "master" ...
2
votes
1answer
285 views

Particle system and controlling the collision on surface on/off dependent on the emitting geometry?

I have three geometries, two point geometries emit particles in a line, like a laser beam, and the third is a plane. I could set the third, the mirror, to collide with the two particle streams. Now, ...
2
votes
2answers
1k views

Soft Body object going through object with Collision?

I have these balls with Soft Body on, when the cylinders are still, they interact with them without issue and bounce off of them. But I animated the cylinders to move side to side (sort of like an ...
2
votes
1answer
151 views

Detect walls and prevent player from jumping on them

My main goal is to have the best jumping experience - (Keep jumping up and down when spacebar is held down, longer jumps when spacebar is held longer), where there is no wall jumps. Currently, minus ...
2
votes
2answers
187 views

Can you have mesh particles that don’t intersect?

Hey there I’m just wondering what I should be using if I’m after this result where there’s scattered randomly rotated pills that aren’t intersecting each other like this… istock example At the ...
2
votes
1answer
2k views

Blender particle system objects not colliding

I have a simple particle System of falling balls but they won't collide to each other like in nature. What am I doing wrong, what have I forgotten? My aim is that the balls have volume and stack up ...
2
votes
1answer
568 views

Blender: on/off collision modifier

I have a collision object with the fluid particle emitter inside. The idea is that when the fluid fills up the object, it explodes and all the particles falls out. The problem is that I can't find a ...
2
votes
1answer
69 views

Change collision properties through time

I've recently started working with blender. For a project i'm working on i would like to visualize evapotranspiration of a park. My animation starts with nighttime where dew is created (picture 1) ...
2
votes
0answers
12 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 ...
2
votes
0answers
35 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?...
2
votes
0answers
77 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 ...
2
votes
1answer
28 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
votes
0answers
57 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 ...
2
votes
0answers
153 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 ...
2
votes
0answers
989 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 ...