Real-Time Physics Simulation Forum

thank you this is helpful.

Small question that is probably obvious but I can't see a clear answer in the forums. Im trying to work out what the basic unit of mass is, I have read 1kg = 1 unit.. Which would be fine... but then what is the unit of force, newtons or pounds? And velocity, metres per sec, km? I can't quite seem to...

Though I still would like a clear explinaton of how to build and use older versions of Bullet (2.87 for example) on the Pi I have in fact discovered that my current version 3.06 is not actually to blame for my errors, it was just me linking a recent update cycle with the appearence of the bug and fi...

ok I think I tracked it down, the error is not actually a valid report, it may have little or nothing to do with AABBs, but it happened when I tried to apply a faulty force calculation in a boids movment system. the Cohesion factor returned NaN which then got passed on to the physics as a force to a...

some years later...

I am also getting this message our of the blue, not at all sure what the issue is though, I am going to try to track it down.

I've read RockHu's response several times but can't quite make sense of it. Im also trying to get an older version of Bullet compiling on the Pi, since the new bullseye version 3.06 is giving me some odd issues, I've downloaded 2.87 but failing to build it despite following (I think) the instruction...

slerping is fine when it comes to the actiual transition of the point we are heading to where we want to head I can easily put a target point the left/right/up/down of the ship and the slerp will take it there controlled but the Delta time and rate of movment. Its just the roll that escapes me.. How...

its a bit messy at the moment, since it isn't working I'm just trying things out, also I have to switch to GLM to do some of the maths then back to bullet which isn't nice. // now lets change orientation? // can't do this in bullet // tp is a target position to move left or right around the y glm::q...

arrgh I hate maths, and clearly I need to love it but.,. I thought this might be a common issue, but a search on here found only issues relating to rotation around a y or z axis, not an arbitary forward axis. Help, Im stuck on someting in my space game again, getting my ships flying around from poin...

yeah that makes sense.... was hoping there be some kind of internal impact value, but ok, I think I can work it out based on the velocity and inertia values...

I'll see how it goes...thanks

Hi all, sorry if this has been asked before, I had a look through the forum but can't find anything. I have my 3D space game up and running pretty well, collisions for projectiles/rockets/ etc all going well. And I can comfortably detect when objects hit each other and allow them to bounce off while...

Thanks that sounds plausable, I'll see what I can do.

Appreciate the help

But.... I do have a question that is still relevent to this. Once I have the RB's group and mask set, is there a way to change it in game? For example to exclude a particular object from the ray cast? I'm thinking that when I have an object selected already, and another object is projected quite clo...

edit sorry
my mistake i was doing it right I made a small edit that stopped it working, fine now...

Well there's a couple of things I can do.. for a start the rig needs to pay much more attention to the speed of the objects in the slots... if a turn creates a displacement at the extremes thats too far for the ship to catch, it needs to slow down.... that might work Also the rig should use the inne...