Questions tagged [physics]

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

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3
votes
2answers
2k views

What are the system requirements for working with heavy/complex scene in Blender? [closed]

Is it possible to create a scene like kung fu panda with more that 5 characters, environment, simulation, vfx, lighting ...etc.
4
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0answers
538 views

Why is this happening when I bake physics to keyframes?

So, I'm trying to do some stuff with physics and cell-fracture, and I need motion blur. When I bake the physics and render w/ motion blur, the objets aren't in the scene. So I tried baking the physics ...
9
votes
3answers
6k views

Seamless looping animation

I'm trying to create an animate gif of a boat where there's no discontinuity between the end and the beginning. To do this, I need the sails and flags of the boat to return to approximately their ...
4
votes
1answer
4k views

How to simulate a sheet of paper in Blender Game Engine?

I am trying to simulate the physics for a sheet of paper in Blender Game Engine. For this, I am using an ordinary plane (subdivided in several faces). I tried doing this by defining soft body physics ...
3
votes
1answer
3k views

Mesh with cloth simulation not responding to wind

I came across a model of a boat, and I tried to add some wind and cloth simulations to the sails and flags. The sails respond to the wind, but the flags do not, they just fall. In both cases I ...
2
votes
1answer
1k views

Moving a ball forward, mechanical force

I'd like to have a ball (blender game engine) which rolls forward by its own and with real physics and friction. It shouldn't be animated though, what I'd like to have is kind of like a "motorized ...
1
vote
0answers
347 views

Collision Bounds Problem [closed]

The Collision bounds are messed up on my character and I cant seem to fix it. It is set to Box. I tried Triangle Mesh but blender crashes (I looked it up and this ...
7
votes
1answer
603 views

Having rigid bodies sliding off an animated object

I'm trying to create an animation in which an object is lifted from the ground and several smaller objects slide from on top of it and drop to the ground. Is there any possible way of doing this in ...
1
vote
1answer
587 views

Through-walkable object with collision!

I wanted to make a nice game, but I am having a problem with water. I am trying to make a simple underwater shader and motion, but I have to make my water so the character can also walk through it. It ...
3
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0answers
145 views

Is there a way to re-bake only the end part of an existing bake?

I'm trying to do some physics based animation, and of course the longer the animation gets, the longer it takes to bake. However, I don't need to keep recalculating the first parts of the animation, ...
1
vote
1answer
523 views

How to make an animated model jump in BGE

My rigged and animated human model actually jumps when i press the required key, but doesn't fall again n the ground. I have tried to click the jump motion actuator and/or increase z motion, but the ...
8
votes
2answers
2k views

Coil Mechanism for Vending Machine

I'd like to make an animation of a vending machine. I'm looking for some pointers on how to make the coil turn and drop a snack. I've made the coil from this link. The coil is on a hard surface and ...
4
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2answers
3k views

How do I add a rigidbody to an object with python?

The only method I could find was to use an operator which seems more like a workaround than a solution.
3
votes
1answer
295 views

Bullets fall with gravity issue

I have some bullets that simply have an always sensor and motion, but since I have gravity on, they fall in a weird way. They do not fall and hit the ground on the tip of the bullet, but rather hit ...
3
votes
1answer
1k views

How to make a rope in the BGE?

I'm pretty sure this has been asked before, but for the life-o'-me I couldn't find it. How would one setup the physics for rope in Blender Game Engine? I tried soft-body; didn't work Incremented/...
2
votes
1answer
1k views

How to manipulate a smoke simulation to look like a realistic candle flame

I'm trying to figure out how to adjust my flame. It's a calm flame with Noise Method-Strength set to zero and all Vorticity settings all set to zero. My flame currently tapers flat like a cone and ...
3
votes
0answers
757 views

Blender crashes when I click domain in the options for smoke [closed]

I've been using Blender for awhile on and off. I recently decided to dive into making fire so I looked up tutorials on how to simulate fire but immediately ran into problems. I couldn't get it to work ...
5
votes
1answer
1k views

How fracture an object into spinters like it's made of wood?

I have a simple table leg I would like to fracture. The result should look like wood, i.e tall sharp splinters. How can I achieve this (with or without the cell fracture addon)
1
vote
1answer
150 views

Push faces together

I'm trying to create pleats on a garment I'm trying to model. Currently it looks like this: I'm not clear how to explain this...I want to "push" the selected faces together, the way we create pleats. ...
4
votes
1answer
2k views

How do I make car acceleration in my game?

I also want to know how to make my car accelerate. Here are my nodes in logic: My car uses Dynamic physics because Character ones make the car shake all the time...
2
votes
1answer
2k views

Game Engine: Object with character physics shakes for some reason

I have recently started to make new racing game. I downloaded and imported smooth detailed car model(.obj). I added Character physics for it, so I can add W, A, S and D controllers to it. But, after I ...
8
votes
1answer
2k views

Create custom physics for an object with python

Blender has physics options which we can enable for our objects - cloth , fluid etc. Is there a way I can add a custom physical behavior to my objects, where this behavior is modeled as a python ...
3
votes
0answers
219 views

How would I simulate a jellyfish on the ground?

I want to simulate a squishy body like that of an jellyfish. The goal is to have one frame where it is at rest on the ground to render an image. The point of the simulation is to have it fold ...
1
vote
2answers
2k views

Export Blender Particle System Hair To Three.Js

After several months of casual research on three.js as I worked on a model in Blender 2.7 I have yet to locate a method for exporting the blender particle system hair? By chance would anyone have any ...
2
votes
2answers
2k views

How do you make objects not collide and pass through each other?

In the game engine I'm trying to make the different types of enemies pass through each other, and only interact with either the player or the player's weapon. I've made them rigid body objects, and ...
5
votes
1answer
2k views

Long hair collapses with soft body physics in animation

I need to animate a long poly hair and would like it behave a little more like nature, so when I move the head it "follows it's path." I used a Lattice Modifier with Soft Body Physics to simulate the ...
2
votes
2answers
945 views

Cloth Physics hung on pole?

I am trying to render a physics cloth of a flag. But I don't want to pin it to two points/an edge... I want it to be wrapped around the pole. In reference to the image I have uploaded: The fabric is ...
10
votes
1answer
520 views

How to build building that is made of small pieces - how to correctly put rigid body over rigid body?

I'm new to blender and actually amazed from the possibilities it provides. I successfully created a set of boxes (like domino tiles) that fall in a chain reaction. (Like in this answer: https://...
0
votes
1answer
632 views

Rigid body constraints and animation

I have two rigid bodies linked together with a constraint. The problem is I need to animate the second rigid body at one point in the simulation. But as soon as I turn on "animate" in the rigid body ...
1
vote
1answer
205 views

Unlink physics of duplicated objects in Blender Game

During the game I want to create a new Object that changes its physics mesh according to a selected ID with an Edit Object actuator and a script on the added Object. I change the mesh with the method ...
2
votes
1answer
718 views

Attach cloth to solids and do animation

I'm trying to build an animation of a sail rising up a mast. Effectively, the sail is in several segments, so realistically, each segment intersection will move at slightly different rates. It will ...
2
votes
1answer
1k views

Wrapping a 2D net over a 3D object

Is there a way to have a 2D mesh wrapped around a 3D object. Like this: The red part is a flattened knot, which I mapped onto the surface of the blue part. In this specific case I used math to ...
4
votes
1answer
547 views

Flag does not move in the wind in Game Enigne

My Flag does not move in the Game Engine. I know how to make the flag work when not in the BGE, but when I move it over to the Game Engine the flag stops working. What could be wrong?
2
votes
1answer
2k views

How do I speed up Blender Game animation?

I am using the Blender Game render for keyframing physics, but when I play it back, it is so slow (the keyframes are close to each other, the closest they can get, but it is still slow). Is there a ...
0
votes
1answer
2k views

Keyframing Physics Animation

I have a Rigid Body object that I want to be animated at a specific time. Can I animate it using the Blender Game engine? Also, is pressing P the only way to see it (can I see it using AltA)?
1
vote
0answers
544 views

Exporting Physics Simulations into Unity

Is there a way to turn Blender simulations into animations that I can export to Unity? What I want to do is to, say, animate a flag, run the simulation and export it to Unity to be used in a game. Is ...
1
vote
2answers
914 views

BGE: Can a rigged rigid body interact with BGE physics?

BGE: Can a rigged rigid body interact with BGE physics? Basically, I want to know if it is possible to have a mesh that is animated by an armature interact with the BGE physics, including other ...
1
vote
2answers
654 views

Compound rigid body in cycles

I would like to create a compound rigid body. I had a look at this video, therein compound bodies were created by sampling primitive bodies together. The collision shape was set to a primitive like ...
2
votes
0answers
92 views

Have rigid body animation only rotate and not translate [duplicate]

I am about to create an Animation of a cloth-hanger, which is meant to become a »real« one, because it should be a rigid body in a physic simulation. The cloth-hanger should hang a real one does and ...
0
votes
1answer
2k views

Object doesn't follow the navigation mesh path using steering actuator

So, I manually created a navigation mesh (i.e. added and edited a plane mesh > changed the physics type in bge to navigation mesh). I then added a steering actuator (path following) to my human model, ...
4
votes
2answers
2k views

Particles don't collide with collision object?

I have an object with a Mirror, Subsurface, and Solidify modifier. I gave it Collision in the Physics panel, but the particle system just goes through the object. I have not baked the particles ...
3
votes
1answer
2k views

Create a stretchy line between two objects?

So I want to create this stretchy rope effect as seen in this video. I want to use either soft body or cloth physics, so I can bounce objects off of them. And I also want it to be connected to two ...
2
votes
0answers
796 views

Is it possible to apply cloth simulation and collision on a character?

I have a character that I created and built the armature for the character but I want it to make it so when the character touches his face, his face does something similar to the cloth simulation on ...
4
votes
1answer
1k views

Pinning cloth to animated model is making cloth go crazy

Something is wrong with my cloth. I made a wizard robe skirt but it goes out of shape when I bake it. Here is my file.
3
votes
1answer
844 views

Is there way to make an object gravitate or lock to the surface of another object?

For example, if I want to make an controlled object move on the surface of a sphere (or a cube, or whatever else) and not fall off, what should I do? I don't need it to jump, so I don't need "sphere ...
1
vote
0answers
280 views

Soft body hook onto an object? [duplicate]

So I'm trying to achieve an animation in BI where there is a string that is attached at both ends to 2 separate objects. But I can't find anything that lets me take my string and attach it to them. ...
2
votes
0answers
181 views

Why strips occur when simulating smoke with collision?

I wonder why those strips occur when simulating smokes with collision. increasing Domain division will impove it some, but will not completely remove that kind of thing. How to get rid of them? ...
3
votes
1answer
2k views

Why does my rig fly away in game engine

I am trying to change my rig to be dynamic so it can stand on top of the static floor. I tried all the tutorial solutions and I can't solve it. Why does my character fly off screen, and not stand on ...
1
vote
0answers
630 views

Cloth simulated object particles don't simulate when start and end emission frames are different

I have a pretty weird problem with particle systems in blender, been looking for an answer for about 10 hours now. Here's the deal: I'm trying to model some money effect. I created a plane with ...
3
votes
1answer
229 views

Projectiles in the BGE

How do I get my projectiles to follow my cursor until they pass it. I'm looking for an effect like homing missiles, but when they reach the corsors position, I want them to continue on their current ...