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physics Complex physics shapes from convex meshes in one Node
anton.savocshenko posted a topic in Physics, Navigation and Path Finding
1. How to collect convex shapes together in one body in editor? 2. Using scripts? 3. By manually editing the *.node file, copying the "ShapeConvex" parameters from another *.node file? 1. This is impossible, as I understand it. Look first video below. 2. ... ? 3. This is possible! Look last video below. Suggestion for Unigine developer team: Create a UI panel "choose mesh" in editor for physics convex shape. standard.mp4 3_editedNodeFile.mp4
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Is it possible? Is it on a roadmap? I'm evaluating Unigine. Ideally we'd be able to plug in our own physics engines, and use existing ones such as Bullet. I've seen some forum posts alluding to this, such as this: > We are considering to add 3rd party physics engine integration later this year (or at the beginning of the 2016). https://developer.unigine.com/forum/topic/3543-physics-engine-stability-improvement/?hl=%2B3rd+%2Bparty+%2Bphysics#entry18727 I'm on a trial and can't access https://developer.unigine.com/en/docs/future (not sure why). Thanks, Sam
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A fast rotating/rolling rigid body (sphere or cylinder) over a flat terrain bumps when moving. I've used a default LandscapeLayerMap, and have not edited it's shape, only size and position. I've added a C# component to the sphere/cylinder adding torque in one axis every frame at the UpdatePhysics() function. CS file is attached. My guess is that the terrain, even a flat one, uses a concave collision shape, and the rotating bodies bumps at the edges of internal triangles of the collision shape. I have this guess because the behaviour is the same over the default ground plane. But, if I add a BODY of type RIGID to the ground plane, set it to IMMOVABLE, and add a BOX as collision shape (a convex collision shape), the sphere or cylinder rotates smoothly, with no problems. I also have this guess because I've found the same bug in Godot Game Engine, which uses a port of Bullet physics engine: https://github.com/godotengine/godot/issues/50463 I've tested changing the following parameters in the SETTINGS > PHYSICS (each of one alone or combined), with no difference: Stable FPS Determinism Sync Engine Update Update Mode Budget Iterations Context of why I am testing this type of behaviour: I have a physics based, arcade like, racing game made with Godot, that does not use a raycast model. Instead, I've made a custom solution with joints attaching rigid body wheels to a rigid body vehicle body. The motors of the joints add torque to the wheels, making the vehicle move. But due to the bug described, I can't expand the game to large terrains. I'm experimenting with Unigine to port my game to Unigine, because the physics in general looks rock solid. I'll continue my tests, but have already found this problem. Additional comments: I can attach the SOURCE and DATA folder from my project. I have not done it already because these two folder together are 500 MB in size, and I don't know if it's worthy it. The cylinder begans to make weird movements after the first bumps. I guess that's because the ObjectBodyRigid.AddTorque() function adds torque to the global/world axis. But the effect is only visible because of the first bumps, caused by the terrain. In the sphere video, the PERSECUTOR camera has some random movements. But they only happen when recording the video (I use Movavi). When not recording, the camera follows the sphere smoothly with no random movements. UnigineRollingBall.mp4 UnigineRollingCylinder.mp4 Ball.cs
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Fixed Joint - rigid body rotates when Anchor 0 position is moved
Saitodepaula posted a topic in Bug Reports
When attaching 2 rigid bodies with a FIXED JOINT, and the parent body is set to IMMOVABLE, the child body rotates if the ANCHOR 0 position is not zero. Also, the child body rotates in differente axis, depending on which axis the ANCHOR 0 position is changed. It only happens on the X and Y axis, not along the Z axis. If the parent body is not set to IMMOVABLE, this behaviour does not happens. Also, HINGE JOINTS have the same behaviour. UPDATE (second video): changing the parent body collision shape position has the same effect. UnigineFixedJoint.mp4 UnigineFixedJoint_B.mp4 -
Hi everyone, I started make video tutorials for Unigine 2.11.0.1 , You can see & use , This is my playlist about unigine, and I hope useful for you. Get started with 8 hours of free video tutorials full of tips you want. Playlist 1 Playlist 2 With respect Ahmad Karami a computer teacher/ author book / test engineer / solo game developer
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пытаюсь сделать винт вертолёта, пока что просто, делаю кубик как основание, к нему прикрепляю с помощью JointHinge цилиндр маленький, к цилиндру прикрепляю две лопасти, аля тонкие боксы, с помощью Fixed. Потом начинаю крутить цилиндр, и знаете что? лопасти никак жёстко не связать, они вечно отчегото или отскакивают или ударяются или растягиваются, и кубик и всё начинает вертеться и улетать в космос, крутил настройки всякие, массу менял центр массы, нифига не выходит. Госпада подскажите как ЖЁСТКО закрепить лопасти, вот что бы без всяких там пружин? и вообще реально ли сделать вертолёт с помощью примитивов, хотя бы в каком-то приближении? это то как вертолётик выглядит, на втором фото то как лопасти растягиваются при увеличении оборотов
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physics [BUG] Box jitter after fall in simple scene
tower120 posted a topic in Physics, Navigation and Path Finding
world1.world - UnigineEditor - 2.13.0.0 (DX11) 2021-02-11 18-59-55.mp4 Unigine version 2.13.0.1 This happens is in world1 data.zip -
Hi, I am not able to find any info in the docs on this, I have been looking at the parameters window and i can't see any option which can be used to constraint a Rigidbody's Rotation or Position. Auto-Complete also didn't provide anything useful when i type BodyRigid.Constraint, how to enable body Constraints in unigine?
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Hi, I'm working on a naval game with Unigine Community, but I have a question, how can i apply the physics of water in a global water as shown in this video: Thank you very much, Bye.
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Hi, could you please give me an advice to the following problem: Once I create a primitive box object on the scene then attaching rigid body into it and changing its Scale Transforms, why the Scale Transforms is reverted back to its original values once the physical simulation toggle is on. Thanks a lot.
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problem I can't change Physics Body type (Water)
Catsasin4401 posted a topic in Physics, Navigation and Path Finding
Hi every one I have a problem I followed the tutorial on YouTube about Physics And then when I change Body type to water it noting happen and turn back to none. I can change to another type but I want to use water type.
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Hi there. I've been trying to figure this out and I can't tell if there is Local Fluid Simulation or not. But I know the global mesh of water and stuff is simulated as a 2D grid with point particles positioned in the vertices of the mesh. And I was wondering if it was possible to use Local Fluid Simulation to for example, have a boat fill up with water after getting cracked hull and it starts to sink. Being able to make boats fill with water would be amazing.
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Deterministic physics calculation on two or more connected computers
sascha.schneider posted a topic in Physics, Navigation and Path Finding
Hello, We have played with the ClothSimulation and the PhysicalWind. The following questions came up so far: How to synchronize the wind across multiple computers ? referring to a similar discussion How to achieve a deterministic/synchronized state for the physic-bodies inside the simulation? Is there something similar to setSyncMode takeSyncData applySyncData Thank you in advance, Regards, Sascha -
Physics of ObjectTerrainGlobal
tolchinski.alexei posted a topic in Physics, Navigation and Path Finding
Hello. Physics of ObjectTerrainGlobal without render (using surfaces - rendering viewportmask 00000000 in Engine or Unigine::Render::get()->setEnabled(0) in code for example) didn't work. My object falls through the bottom. With using render it works, but i need without render. Is it bug? Or is it normal logic of ObjectTerrainGlobal? P. S. i work in version 2.7.2 and i can't updgrade to the new version. -
How to simulate hydrodynamics behaviors of water on bumpy terrains? The effect may not be exact, reasonable is good enough. The scenario is somewhat like pouring some water onto bumpy ground, and water stream would be affected by gravity and terrain geometry, when 2 flows of water come together, they will merge into one stream. And if there is a hole in the terrain, the stream will flow into the hole by gravity. How can we do that?
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Floating Object in water using ObjectWaterMesh
mayur.patel posted a topic in Physics, Navigation and Path Finding
Hello, I created swimming pool scene and wanted to floats some objects on the water. Water created in swimming pool by Objectwatermesh node.... how can i puts some floating objects like waterwings, rubber duck etc to bring more detailing about swimming pool. Please provide any solutions...that make my scene complete. Mayur patel -
Hello, I am new in this world and I have many doubts. I have a problem with the Landscape. I have create a Landscape object through LandsCape Tool and I have put it on the World. Later I have created a sphere object. My problem is that I do not know how to set the physics on the LandScape in order to interact with the sphere. The sphere always goes through the landscape. I hace create a box and I have situated it below the sphere. In this case, the sphere does not go through the box. Best regards Rafael
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Hi, In my case I cannot delete Physic shape from Rigid body. It's crashes Editor2 e.g.: I cannot replicate this problem at new scene. But it stays for me even without any implemented code or script. It's happens even for a new world. So it may be related with my updating project for new version of SDK.
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hi , i'm studying for Unigine. i have a problem. I saw sample ' actor01' and i knew playeractor is need to move physics playermoving. playeractor works when playeractor pivot is appeared in my camera. However, playeractor pivot is not in my camera , playeractor doesn't work. please help me how can i solve it.
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What is the best suitable code area to put a cars physics calculations such as torque velocity etc. onFlush, onPreUpdate, onUpdate, onPostUpdate or onRender? After I calculate physics I send them via network. Where should I send and receive these values? Thanks.
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Hi, I have developed a game over game framework. I am using your Car, Level, Driver examples. My car is getting commands from UDP ( wheel, gas, brake etc.) Anyway, If my camera is not looking at my car physics are not working. It gets ignition, gas but it is not moving unless I turn camera to car. Is there anything to fix it? It makes no sense. I should not always look at my car. Before you ask, my code is too huge and complicated to send. But I don't think there is something about my code. There must be a setting maybe rendering setting. Thanks.
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Hi, For a car simulation, I've made some tests with JointSuspensions, but I've realized that it's not possible to keep real mass values for the bodies without getting instability. The physics car demos have still "fake" values like gravity of -19.6 or a car mass of 4Kg to get better mouvement. It would be great if you improve this. Regards, Philippe
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Hi. I'm developing the forklift simulator using UNIGINE. I got some problem. 1. Vibration Black box(load) is vibrated when I lift up the Black box using fork. The Black box slip over on the fork and drop on the floor. 2. Lift up Red palette is never lift up using fork. Thin surfaces are can't resist fork. I mean fork go through the any thin surface(kind a red palette's upper surface, black box side surface) 3. Friction I feel there's no friction. Fork can lift up the black box only but can't move left and right. Fork and load move separately. How can I solve these problem ? I attach a simple forklift simulation file. Please give me a reply ASAP. folklift_test.zip terrain.zip
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Hi, we have a vehicle model that will run scripts for engine torque, rpm, efficiency, etc. I calculate a torque value from car engine to geartrain and differentials, then apply the torque to the wheels, Unigine handles the physics beyond that point. I need to fetch the rolling resistance experienced by the wheel, so that I can take into consideration the negative torque feedback to the engine to use it as engine load. Is there a way I can "get" the current forces on the wheel? Cem. P.S.: I am using JointWheel by the way.
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Physics for tank with wheels and tracks
santosh.a posted a topic in Physics, Navigation and Path Finding
Hi, We need to implement a physics based tank with wheels and tracks but are facing some issues. 1. The track chain is coming off the wheels, similar to the physics/tracks_02 demo. 2. Track pieces are colliding with each other and causing unwanted dynamics. 3. The tracks are vibrating significantly when tank is not moving, similar to the physics/tracks_02 demo Can anyone share some info on how to go about creating tank physics or provide a working prototype? Thanks in advance.
