Questions tagged [collision]

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8
votes
0answers
161 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 ...
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234 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
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0answers
54 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
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0answers
68 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 ...
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0answers
224 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
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0answers
50 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? [...
2
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0answers
32 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
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0answers
69 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
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0answers
169 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
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1answer
205 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 ...
2
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0answers
66 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
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0answers
199 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
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0answers
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 ...
2
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0answers
277 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, ...
2
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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 ...
2
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0answers
398 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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0answers
33 views

How to pin cloth object to another object

I'm trying to pin a cloth object to another object. I tried to fix it through the Vertex group. However, because the two objects are dissimilar objects, cannot try to pin them together into the same ...
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0answers
27 views

Particles system with negative frame start don't work with collider?

I noticed with particles system negative frame start, the particles are not simulated with collider during the negative frames. The bake work, but particles are affected by collider only after frame 0....
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0answers
13 views

Setting up emitter to text and morphing to another text?

I am wanting to emit particles to form a text and then for the text to morph into another text, and to do it in Blender 2.81. Are there any experts out there with the know how to accomplish this. I am ...
1
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0answers
22 views

One-Way collision / One-Sided collider

I try to fill up my mesh with particles(molecular addon) falling from top. What I would need is an one-way collision to "trap" the objects inside the mesh and form the shape if something like this is ...
1
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0answers
48 views

Blener 2.8, how to make a rigid object hang from a cloth simulation?

The desired end result is that the necklace is cloth-like, and the star-shaped charm is rigid. Both react realistically to the environment as they hang around the character's neck. Thus far, I can get ...
1
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1answer
27 views

PopCorn Particle Background

Anyone have an idea of how to make popcorn fill up my screen using practices, or got some video that would help me out, thanks! I am trying right now, but they keep jumping up and down and not staying ...
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0answers
57 views

Cloth vibrating with object collision turned on?

On the character rig I'm creating for an animation, I have a cape, which is a piece of cloth which is solidified to give it thickness. However, I want it to collide with the torso, head, and arms of ...
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0answers
65 views

How can I make my cloth sim show tight folds?

I'm trying to achieve visuals like the following: Unfortunately, this is the best I've got so far... I'm using the 'pinning with hooks' method seen halfway down this page - I'd let the cloth drape ...
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0answers
33 views

Why is my cloth colliding so weirdly?

I am trying to simulate cloth on top of an umbrella, that's blowing in the wind. Right now I'm already struggeling with the cloth clipping through the base of the umbrella. I tried isolating a single ...
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0answers
25 views

“Whip” falling through handle. Collision + Soft Body

I have a four bezier Circle tied to a path that twists to form a rope and a separate object of the handle. The rope runs in the middle of it. I've changed ball weight etc and added the handle as a ...
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0answers
38 views

Define died after collision particles via Particle Info node

Usual "death" means Age/Lifetime ratio is 1. This is simple to define with corresponding outputs of Particle Info node, but how to deal with particles killed by collision? Maybe some math involving ...
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0answers
130 views

making a character mesh collide with surfaces

I'm wondering if there is a way to make it so that my character mesh collides with all other surfaces in the animation process so that i don't accidentally put feet through the floor or fingers ...
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0answers
120 views

Collision and cloth modifier don't work

I would like to use the collision and the cloth modifier to fit perfectly the shirt and the pants (created with adobe fuse) to the body of my character. I've created the character with the manuel ...
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0answers
736 views

Rigid Body Physics - Mesh collision not working

New to blender, and have hit a wall getting a test scene to work. Funnily enough, the wall I've hit is that I cannot get my rigid body geometry to hit a wall! I am creating a galton box simulation to ...
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0answers
177 views

Export ONLY face normals of a mesh

I'm very new to Blender and just trying to accomplish some simple meshes for my game project. In the process of developing some collision meshes I'm looking to create some meshes that ONLY export the ...
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0answers
190 views

Rigid body go through soft body(not supposed to happen)

I want to clarify that I am really beginner with blender. I modeled a fairly simple .blend with balls that are supposed to be retrieved by a robot. At first I tried with a ball made with "rigid body" ...
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0answers
293 views

Blender Physics Simulation is Weird

First of all sorry for my english. I'm trying to make physics based short animation in blender. I'm using molecular addon but simulation isn't correct. It always pass the collision even at 16 ...
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0answers
264 views

How to make the cloth object simulate out of my collision body in blender?

I am simulating a cloth over a body obj. I have a problem with my cloth getting inside of the body before the start of the simulation. If I apply cloth physics to the shirt and collision physics to ...
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0answers
63 views

How does Mesh based collision shapes works in Rigid Body Simulation?

I kind of understand the difference between Convex Hull and Mesh shapes. But my question is how does the physics engine works for these two? In the case of the triangles how does the engine calculate ...
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0answers
68 views

Bullet particles not colliding with cell fractured model

I have a particle system emitting a bullet object with collision and rigid body. I have it so the particles collide with a cell fractured object which also has collision and rigid body. I have tried ...
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0answers
144 views

Make particles appeared when colliding with a object

I wanna make a particle simulation where the particles would appeared when colliding with an object. My setup is this : Particles are being emitted from a plane. Wind is pushing the particles toward ...
0
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1answer
30 views

Animate Collision On and Off

I have an object that a cloth is colliding with, and I want the collision to be disabled in the middle of the animation. However, I cannot just turn off object Collisions on the cloth, because there ...
0
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0answers
14 views

Why do the origins of Explosion particles change when I render the image?

When I look at the Explosion particles in the view port they are exactly where I want them (Top picture), however when I render the image the origins of the particles seem to change as in the lower ...
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0answers
21 views

How to make baggy clothes using Cloth Sewing, Cloth Modifier and Object Collision?

My question is two fold: 1) How to make baggy clothes in blender using Cloth Sewing, Cloth Modifier and Object Collision? In all my attempts the cloth : a) Fell down into the never ending abyss ...
0
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1answer
15 views

Making an object heavier on one side to afect the fall of an object with ridgid body (active) applied to it

I want to make an object (which has rigid body_active applied to it) to be affected by gravity more on one side, as it falls to the ground. How can this be done?
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0answers
7 views

Make hair bones collide with parent mesh?

I’ve followed this tutorial, which is excessively in depth. Essentially it is a line of verts given a cloth modifier, an empty parented to each vert, and bones between each set of verts with IK set to ...
0
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1answer
12 views

Make the wall of a UV sphere collide-able in untiy?

i followed the tutorial in this answer to make the hemisphere. but when i added it to unity and generated the colliders , the BASE of the sphere had a collider on it. (imagine if hemisphere had like a ...
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0answers
41 views

Making Box Colliders in Blender instead of Unity

Good evening community, It's more of an asking for an advice than actually a question regarding to game design with blender and Unity. So I've basically created a level in blender (3D) by mainly using ...
0
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1answer
16 views

Flag Physics seems fine when on the viewport but looks messed up when rendered

I'm fairly new to blender and I've come across this issue. My flag with wind physics seems fine when I animate it on my view port using collision physics. Here's a sample: https://imgur.com/qmJvESK ...
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0answers
32 views

How to get particles to move with object. Works in 2.79 not in 2.8 possible bug?

Seems like a pretty straightforward question. I am using blender 2.8, and had trouble for days trying to figure out why my particles escape my collision object once the collision object begins a ...
0
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2answers
47 views

particle collision is weird whith sphere object

I have a problem with a particle system and my sphere objects deep half way through my collision object, the screenshot is here:
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1answer
47 views

Cloth falls inside object rather than on top

As you can see in the picture, the blanket folds inside of the top mattress when it's supposed to fall on top. The blanket starts outside of the perimeter of the mattress but gets sucked in for some ...
0
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0answers
29 views

v-hacd blender 2.8 with physics engine

I am trying to get to work with the V-HACD add-on on Blender 2.8. While the convex hulls decomposition of the mesh works well, I was wondering how to make it work with the physics engine to animate ...
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0answers
25 views

Roulette Simulation Rigid Body

I am currently making an roulette simulation. I have 4 main objects: the bowl, the sphere, the spinner in the middle and the separators which separate the numbers (I don't know the correct name for ...