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  • Profile picture of normen
Group logo of Troubleshooting – Physics

Troubleshooting – Physics

Public Group active 31 minutes ago

Physics related problems

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  • Profile picture of neopangaia

    neopangaia replied to the forum topic soft body dynamics? in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 31 minutes ago

    as you may have noticed in another thread.. i got an acer w500 tablet (dual core low end amd with integrated 6150) 2gb ram

    needless to say, i will not be installing a 64 bit os so i will be makign the game 32 […]

  • Profile picture of iwgeric

    iwgeric replied to the forum topic Question about Axle vector for Vehicles and Wheels in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 3 hours, 4 minutes ago

    The final version is working. We ended up creating the vehicle chasis with the +Z pointing out the front of the vehicle. This forces the wheel axle to be set to (-1,0,0) to make it point to the right. As […]

  • Profile picture of normen

    normen replied to the forum topic CollisionShapeFactory inverted normals? in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 5 hours, 55 minutes ago

    A simpler test case just for the issue would be much appreciated next time. In your test the Floor is A when its a mesh shape and B when its a Box shape so naturally the normal inverts if you don’t check for the […]

  • Profile picture of iwgeric

    iwgeric replied to the forum topic Question about Axle vector for Vehicles and Wheels in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 11 hours, 12 minutes ago

    I should know tonight. I’ll let you know how it goes.

  • Profile picture of normen

    normen replied to the forum topic Question about Axle vector for Vehicles and Wheels in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 11 hours, 24 minutes ago

    @iwgeric said:
    Also, I haven’t tried it yet, but if you have a node instead of a geometry for the wheel and then rotate the geometry 180deg to counteract the bullet rotation, I think you’ll be back to having […]

  • Profile picture of iwgeric

    iwgeric replied to the forum topic Question about Axle vector for Vehicles and Wheels in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 11 hours, 31 minutes ago

    I believe that if the axle direction is in the opposite direction as the chasis, the wheel geometry/spatial will get rotated. With the spatial origin in the middle, the position of the wheel will be fine and if […]

  • Profile picture of normen

    normen replied to the forum topic Question about Axle vector for Vehicles and Wheels in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 12 hours, 10 minutes ago

    Okay, seems I understood you, I got a bit lost in the long text and was all like “xyzzxyxz” ;) Just having a separate wheel model at 0/0/0 should work if I got your right, shouldn’t it?

  • Profile picture of iwgeric

    iwgeric replied to the forum topic Question about Axle vector for Vehicles and Wheels in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 12 hours, 12 minutes ago

    Thanks for the confirmation. I reviewed the wiki info on vehicles, the test class, and the native bullet code to understand what was going on. I just wanted to find out why. I think I do now.

  • Profile picture of normen

    normen replied to the forum topic Question about Axle vector for Vehicles and Wheels in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 12 hours, 21 minutes ago

    Yes, make the vehicles point in the z direction or else make them move backwards, this is what I found out as well. Look at the vehicle test and maybe the vehicle editor in the SDK, both consider this and then go […]

  • Profile picture of iwgeric

    iwgeric replied to the forum topic Question about Axle vector for Vehicles and Wheels in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 12 hours, 31 minutes ago

    Please keep in mind when you read this that I’m not an expect in rotation matrix, but I think I’ve narrowed my issue down. I’m not sure there is actually and issue with Bullet or JME at this point, but I could […]

  • Profile picture of skidrunner

    skidrunner started the forum topic Upward collision problem in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 16 hours, 57 minutes ago

    When using the character control and mesh collision shape for the world the player is pushed through the ground when there is a mesh above the player less than two times the height of the player. Has any one […]

  • Profile picture of carter12s

    carter12s replied to the forum topic Error with enabling debug for physics engine while working with player control. in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 2 days, 7 hours ago

    Normen I have set my test case on a git server so that you will be able to access it if you want

    git clone http://174.45.208.195:8081/CharacterTestCase.git

    will allow you to clone the repository through […]

  • Profile picture of carter12s

    carter12s replied to the forum topic Error with enabling debug for physics engine while working with player control. in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 2 days, 7 hours ago

    Great idea Normen! So in doing this I can recreate the error, but it does require more steps than I previously thought. For the error to occur my map also has to be in the scene. I made the map in blender out of a […]

  • Profile picture of normen

    normen replied to the forum topic Error with enabling debug for physics engine while working with player control. in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 2 days, 9 hours ago

    Can you make a test case for this? Can’t really reproduce it, when creating a test case you’ll either see whats wrong in your code or you’ll get the same issue and I can track it down using that test case.

  • Profile picture of carter12s

    carter12s started the forum topic Error with enabling debug for physics engine while working with player control. in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 2 days, 9 hours ago

    So here is the code snippet that is making trouble:

    Node myCharacter = (Node) assetManager.loadModel(“Models/Soldier.v1.mesh.xml”);
    myCharacter.setLocalTranslation(0,10,0);
    CapsuleCollisionShape […]

  • Profile picture of iwgeric

    iwgeric replied to the forum topic Native Bullet addConstraint and setCollisionBetweenLinkedBodys in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 3 days, 18 hours ago

    Thanks @normen for the fast response.

  • Profile picture of normen

    normen replied to the forum topic Native Bullet addConstraint and setCollisionBetweenLinkedBodys in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 3 days, 20 hours ago

    Thanks, I fixed it and the next build should contain all binaries. Ragdoll test is much nicer now with native bullet ^^

  • Profile picture of normen

    normen replied to the forum topic Question about Axle vector for Vehicles and Wheels in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 4 days, 6 hours ago

    Check the bullet documentation (I know, good joke) or just experiment. I was able to get out anything I wanted from bullets raycast vehicles. The wheel location is also bullets decision. The wheels are rotated by […]

  • Profile picture of iwgeric

    iwgeric started the forum topic Question about Axle vector for Vehicles and Wheels in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 4 days, 12 hours ago

    I’m a little confused about the Axle vector in the addWheel method. It looks like my tires rotate the correct way when I have the vector set to point to the left when looking in the direction of forward travel […]

  • Profile picture of iwgeric

    iwgeric started the forum topic Native Bullet addConstraint and setCollisionBetweenLinkedBodys in the group Group logo of Troubleshooting – PhysicsTroubleshooting – Physics 4 days, 12 hours ago

    I noticed that I was getting collision between 2 rigid bodies jointed by a hingejoint. While looking at the code, it looks like the extra parameter for setCollisionBetweenLinkedBodys is not being passed into the […]

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