A mod for building analytically defined defensive lines.

Ha!


You don't need to understand what an ARX approach or a Chebyshev node is to use !

That’s the more intuitive spline nature at work. Here it deviates in application, though. Chebyshev nodes are useful in raw polynomial interpolation ...

Oh, i've heard of ballistic before, but im not sure the train can be considered a projectile.

Let me tell you about the sport of peep bowling!



It’s getting a little weird giving advice to the devs.


No it's not, i do it plenty of times when asked for thoughts in the FFF, other players too ...

It would be a no brainer for me to change used reference function f(x) into a spline g(x) or anything else g(x) if |f(x) - g(x)| < 0.01 tile for every x from 0 up to rail length. Differences above 0.01 up to 0.05 i would have to test in game to verify if they look correct. Above 0.05 it is a clear ...

After some consideration i do not think describing exact position functions would do anything bad, i would actually like a nice compact spline to exist that would match existing position functions as it would allow me to get rid of Math::sin and Math::cos usage.

If you did fit a spline to the ...

I’m getting a little bogged down by the quoteception. It’s hard to consolidate when an idea derails and that derailment sparks its own derailments, all while trying to move forward as well.


I understand this is what boskid said about the new rails, but i was still on the old rails, wondering how ...

Most of what i could find for NURBS was in 3D which i suppose it what you called orthogonal to the spline.( the rationnal part) It's interesting in itself, but in relation to the shape of the curved rail, i think it's illustrating "the more you learn, the more you realize there are things you know ...

A spline in this context is a piecewise polynomial function, where the value and some derivatives are typically constant across transitions. It is normally specified as a linear combination of control points, the combination changing with time. The details matter more for modeling than the nature of ...

Vertically that makes people's ass fly off their seat which is fun or would ruin a freight train infrastructure as you explain, the downward-to-horizontal curve having the potential for positive vertical G's, where people get the feeling of weighting a ton, being slammed into their siege stronger ...

I can see how the parameter l can be tweaked and the curve changes shape so that its lengh matches the change in l in direction and magnitude at the cost of more squareness for the 1/4 circle but still try to stay similar to in game curves rails shape. It looks cool but it is not how it's done in ...

Not if you want to calculate the length along the curve. Nor if you want to calculate the distance from an arbitrary point to the curve (e.g. for collisions).


It already isn’t feasible to compute collisions in curves analytically, and Factorio doesn’t do that. Collisions are a post-hoc check ...

Position function can be literally just anything and i could make it go straight, then wiggle side to side then do a barrel loop and then go straight again.

Haha, yeah. All depends on your purposes. You could probably make it horribly discontinuous and disassemble trains visually.


In 2.0 the ...

Thank you, boskid! That is what I wanted to hear.

I did use get_rail_segment_length to find the length, but I used it more as a checksum to see if a shape could plausibly be the one used by Factorio, my bigger goal. Turns out the nature of the shape is tunable, not lending such credence. I was ...

It has to be a function of distance giving a position, that’s easy to evaluate. It’s easy to do that with things like arcs and splines. Superellipses, not so much. At best, there was an attempt to use such a fancy shape, but then it was approximated by other means.

8.55 - sqrt(2)/2 = 7.84289321881 ...

I’ve been wondering about this for a while. FFF #377 spurred my interest again. We know the current curved rail moves 7 tiles in the major direction and 3 tiles in the minor direction, curving from 0° to 45°. That is not possible with a circular arc alone. I’ve tried some arrangements like a ...

We made some changes, can anybody confirm if it is fixed in the latest 1.1 release?


I gave 1.1.46 a go on my Mac. It seems to use the full, pre-overflow result now. A cursory glance at the machine code suggests the same: addl followed by jg, without split-brain handling of the two result parts ...

That sentence is a bit dense. It’s easier to interpret when split like this:

Characters associated with this player will be logged off when this player disconnects. (an action that will occur under a specific condition)
Characters associated with this player are not controlled by any player. (an ...

You need to change the fuel’s fuel_top_speed_multiplier. Nuclear fuel normally has 1.15. This changes it to 2 (518.4 km/h, incidentally very close to the 1990 TGV record of 515.3 km/h).

Also when there is no place for the items to go, the whole line stops while in fact all those items should get squashed more and more and finally be thrown out of a belt and onto a ground. How could we be so blind here? This will create so many new challenges for a players since they will have to ...

mmmPI wrote: Sun Oct 17, 2021 3:24 pm And for a car or tank ? Is it player's speed ? vehicule speed ? or item speed ?

Player’s speed. Items get special treatment. That’s all. I don’t know the details of that behavior, however.

mmmPI wrote: Sun Oct 17, 2021 11:43 am This could be used to calculate the rotation speed of a player when he afk on a 4 loop belt !

If only. Visual belt speed (CAV), item speed (CLV) and player speed (neither; always much faster than the belt and approaching an inner item’s AV on the very inside) are all distinct in corners.