Found it, in a plugins folder, but not the same one I was looking in, this folder had a few folders 6 or so, and a few rb. files, may have been the auto load folder you mentioned. At any rate it is gone. Thanks for your help!

Yes, I think zorro2 would be the ideal candidate. Make a simply cube (starting with the rectangle tool) in your model so that you can align the section tool precisely to the faces (i.e. axes) then move it to the perimeters of you tin, right click > slice model at section. Repeat it from all 4 sides.

I had issues with atdi as you know, I also had a problem with mapmart, you click the hidem link (any)then the begin search button at least in my case the next page doesn't load, even after a few minutes it never loaded. Well finally after scrolling down the page I found a button that worked then I jumped through some hoops (more hoops than Geocomm had). I am done with hoop jumping for now. I had the best luck with Geocomm. I found another piece of info on sketchup's help page, that said if you import any of the .ddf files extracted from a sdtm compressed file they all will load, looks like about 15-20 files all together, why? I don't have a clue. I did download 3dem but didn't install it yet. I clicked Alan's link and found a 7.5 DEM, thanks Alan, and thank all of you for your replies!

Thanks Gai, I will give it a shot

New modified version without flanges. The flanges would be cool, with a V-mod on the center of the wheel, so the balls don't land in a straight line, more random placement, in theory anyway. rototrebwf.skp

There may be some trick about how you connect the pin to the rest of your model that is relevant. I can't remember exactly how it's done, though. The idea is that if you make your objects as regular SketchUp objects, then select them all and group them, their collision geometry will be generalized, as mentioned before. That is, SP will just envelope the entire group in a single invisible rectangle that will define its physical boundaries. You may want to make your main body as one group, and set its characteristics as "nocollision", then make a second group, consisting of your pin. Now group both of these together. The two groups may then retain their original collision boundaries. I'll do a few experiments and take notes, then post them here. It's a common problem, and I am tired of having to figure it out from scratch every time, so having it written out would be good for me, too.

I might be able to figure it out, if I had a place to start, mainly I am interested in making, my models do different stuff. I have played around enough to have a basic understanding of the UI, but it's very basic. Things like rightx and righty I can figure out, but things like -rightx-righty+1, it works but why? and whats the +1 all about? A place to start would be like what commands there are, and how are they used. There is zero documentation on this kind of stuff that I can find.

Maybe I should have written the name like this Sno-Rover, as in a rover for snow (removal). The following is a comment not necessarily connected with the post above. (it is an ADD thing). Articulated vehicles seem to work better than those with steerable wheels. It seems the servos are to weak. It has to do with the perceived mass of the object they are connected to, or so I read somewhere. It sure seems to be correct.

I occasionally use sketchyphysics too. I added the suggested tags to my SP models in 3D warehouse. But I disable it as soon as I am done physics modeling, because it negatively interacts a with a bunch of plugins including getting terrain from google earth. I disable vray for some other negative interactions too.

It does seem to work, well, as usual I learned some things with this project, mainly to do with groups, the biggest thing is , like in this case use one group for the front and one group for the back, then of course the wheel/axle groups. I found that the axle assemblies work better (more responsive) is only "connected" to one group, not a group of two groups. Now if the animation record part of SketchyPhysics, would track and follow like I would expect them to do, the video quality would be much better. Screen capture programs just don't work that good, for this application. Here is it issue I am having. If the track or follow is applied, the resulting sequence of images, show only the initial screen, if you drive out of that screen area, when running the animation, as you are seeing it it works great. But the image sequence doesn't, show what you see while recording. Perhaps there is a setting I haven't found yet. Thanks for your comments!

Is this SketchUp Physics?

Hi Dan, I am using the sketchyphysics export, after recorded video, under plugins>skethyphysics, there two options, export, and clear. I tried camstudio on the project and it turned out not good, usable but not good.

Well the truth is, I had the motors set to sphere, but not the wheels, they were set as default.