Yes, setting 0 mass is correct if you don't want it to move. Also note that using TriMesh and ConvexHull shape types cannot be pushed/have movement even if they have mass. They are static shape types. If you want movement you have to use some of the basic shape types like the av or the fish has there.
The bug where you go inside the object is in fact a bug and it should not happen. I started noticing it at the time when we got the new optimized network code in that is tied to the physics (as it optimized networking for objects with EC_RigidBody). My hunch is that its tied somehow to the client side interpolation/dead reckoning etc. Am not a real expert on that particular field so, I'll let others answer better. But just wanted to say its a bug an afaik that should not happen in a proper simulation, that would be weird, you could help by submitting a bug report to issue tracker :) You already have all the info there that you need to describe the bug very well. https://github.com/realXtend/naali/issues Let us know if you have anything else. Cool that you are giving Tundra a spin! Best regards, Jonne Nauha Adminotech developer On Sun, Jul 1, 2012 at 4:44 PM, Cale Vinson <[email protected]>wrote: > Hi. > > I was trying to get to grips with the Tundra framework by playing around > with the very simple "Avatar" scene, and in the course of that > experimentation I observed something odd. Or at least something that seemed > odd to me. :-) > > In the un-modified Avatar scene, the fish has a non-zero mass, and so if > the > avatar (AV) walks into it, the fish is pushed away. Am I correct in > believing that if you wanted the fish to be a stationary obstacle (maybe a > statue or something), the way to achieve this is to set its mass to zero? > Because when I tried that, aside from the one issue below, it seemed to > have the desired effect. > > Once the mass was set to zero, if I walked my AV into the fish at an angle > (say 45 degrees), the collision/physics was fine - my AV did not penetrate > the fish, and just "slid" along parallel to it. However, if I walked my AV > into the fish and carefully chose my direction so that I was hitting the > fish at right-angles (hence not sliding to the left or right), and kept the > "walk" key down, then, intermittently, my AV would start *walking > backwards > away from the fish* (and to a considerable distance too) until I released > the walk key, whereupon the AV "snapped" back into the correct position > next > to the fish. > > Is this a recognised bug with either the Tundra core physics/collision, or > the sample avatar control/motion scripts in the "Avatar" scene? Or am I > doing something silly at my end? > > Cale. > > > > > > My PC specs: > Processor Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz Memory (RAM) 4.00 GB > Graphics NVIDIA GeForce 8800 GT Windows Vista (TM) Home Premium > > Experimentation using Tundra 2.3.3.1, running both the server and viewer on > the same PC. > > [email protected] > > > -- > http://groups.google.com/group/realxtend > http://www.realxtend.org > -- http://groups.google.com/group/realxtend http://www.realxtend.org
