Railworks America

Does anyone have any idea what lines in the positional matrix of an assets .bin file govern rotation? I know that the last four lines govern x-y-z movement but im having no luck with the other. I have a light that i'm trying to point in the opposite direction by hacking the .bin file with RW_Tools.

I don't recall offhand which line it was. What I do is to export through the asset editor and rotate in the desired direction and angle (need not be perfect), and then adjust the values in the blueprint by hand.

This ought to go in a FAQ somewhere, I think.

http://forums.uktrainsim.com/viewtopic. ... 0#p1549720 - just read "top to bottom" instead of "left to right".

Quite easy to knock up a generic spreadsheet for doing single rotation, but if you want to do two angles together they need doing individually.

SMMDigital wrote:Does anyone have any idea what lines in the positional matrix of an assets .bin file govern rotation? I know that the last four lines govern x-y-z movement but im having no luck with the other. I have a light that i'm trying to point in the opposite direction by hacking the .bin file with RW_Tools.

I thought with a 3D Design tool was easy to rotate any object, it's a pain to do that by typeing matrix (as I use to do once I don't have basic model source). IIRC each five positions you have a direction, but the problem is the following 4 positions because if the values are wrong it results in a distorced object therefore it doesn't work. Once I got it indirectly placing a spotlight in a cenario and then checking its coordinates in the scenario bin, but took me hours, I opted to not repeat the experience again, isn't worth the effort... Maybe someday I'll give a try again (maybe is each four positions as Kali mentioned).

I wrote the post I linked, I know exactly what it is :p matrices like those are very common in 3d graphics, it's very easy to apply transformation matrices to them - basically you just use the top left corner of the overall matrix, and multiply it with a 3x3 transformation matrix - matrix work is practically all I can remember from my graphics programming modules. I couldn't really get it any more concise than that post anyway.

If someone wants to copy it all & stick it in a faq here, go ahead.

Done!
viewtopic.php?p=66005#p66005

Kali & Papa

@ Kali, by chance do you have (or could create) a spreadsheet for automatic calcs? I never did it in Excel.

Thanks,
Doc.

I did somewhere, but only for single rotations ( and scaling ) - there's far too many combinations to do all of them in one sheet, it's totally unwieldy. I'm sure I gave it out to someone recently, but I don't know what I've done with it.

You can more or less literally put the formula from Wiki into a spreadsheet though.