Hey thanks for the comment!

Another test...

Just testing some more potential interactions...



Only took 50 takes, but totally worth it 

I suppose since that is a missile it should explode or something, but the end result is still pretty great.

Reminds me a bit of Cargo! The Quest for Gravity.

It looks neat.

Wow, what a strange game

I have toyed with the idea of having a character that you can run around with. I have another game prototype that is similar to a game like Alien Swarm that I might combine this with at some point just to see how it feels, but as of now I don't see that as a long-term direction.

This looks really interesting so far, would love to see where it goes.

Thanks! I think for now until that million dollar idea shows up I will just keep adding random stuff that isn't too specific to a certain type of game.

A playable version for the public should help find a direction also.

Been working on integrating some wind. Here is a biplane at rest when a big gust comes:

(click for gif)


Tough to fly in these conditions  

Here is an example of a plane with a much-too-heavy missile attached. I only roll to display the missile. This shot took a few tries to actually get lined up to fire and hit properly. The switch from missile view to plane view is abrupt but such transitions are overrated for the moment.

(click for gif)

I guess that was part of what I was hoping to figure out based on some feedback here. As of right now, there are no limits to what can be done. Every component is defined in a configuration file and there really are no restrictions. You could define an engine with 2000000 thrust with 1kg mass, and wings with a huge wingspan with 1kg mass. While this is not likely to work, it gives you an idea of the extremes and (non)limits you can go to at the moment.

Like I said in my first post, I've been playing more than actually developing. For me the fun part is trying to fly stuff that really is not ideal for flying, such as the small plane with a big ass missile... one miscalculated pitch or roll and you are eating dirt.

An idea for this would be pretend you were given a fuselage containing several tanks that needed to be transported to a certain location and you had to figure out how to design the plane around the fuselage to get to the destination.

Another idea is having finite resources to build your planes and having to make runs to your mining outposts to drop and/or pickup supplies in order to further your development. This could also play into the different fuselage types example above.

But on a totally unrelated note, it was a lot of fun trying to figure out the right alignment and power for that missile in the gif that hit the boxes. I probably spent an hour trying to get the right angle and pitch/power for that to work.

I've never actually played KSP and it is purely coincidence that this is similar. I have read about KSP but have no intention of involving orbital physics and what not. Even though it is possible to create rockets that fly into those outer space altitudes. Behavior is undefined in that area though 

The real-but-not-so-real flight mechanics are the fun part of this. What you build is what you get. I've built a light weight plane with a heavy missile attached to it and the thing is a bitch to control, but when you get it off the ground and line it up right, fire off the missile and hit your target, it is very rewarding.

I see this being highly moddable, like any sandbox should be.

[Original post]

Warning - lots of gifs in here.

Recently featured in TIGSource Devlog Magazine #15: link

Recent article from Alpha Beta Gamer: link

a "lets play" youtube video of early gameplay:





Some user creations:






Latest gifs:




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Original post
Just a heads up, this thread will likely be gif heavy.

This project started as a remake of Sky Odyssey, but quickly turned into a physics based sandbox with an emphasis on flight. There isn't much direction at this point but I find myself playing more than programming so that must mean something.

This is currently being developed with Unity, and as you can see from the content that I have, it is using standard assets for the time being. The flight physics have been written from scratch and are realistic yet generalized. What I mean by this is for a wing, there is only a single point for lift and drag calculation as opposed to a detailed definition for the entirety of the wing. This is out of design because a) it provides results that are good enough and b) it is much easier to work with from a user point of view.

Without getting too technical, here is a basic plane:


This plane is defined by a fuselage, a propeller, 6 wing components, and 3 landing gear components. Each component has a mass property. The fuselage is nothing more than a mass. The propeller has a thrust, which you can see by the blue line extending from it. Each wing has lift and drag; lift is the green line and drag is the red line. The magenta line is the overall velocity of the plane. Wings can also have ailerons which when activated can increase or decrease the overall lift provided. In this example the far left and far right wings have ailerons, as well as the two parts of the tail. The rudder is just a vertical wing with an aileron. By manipulating these ailerons you can control yaw, pitch and roll.

A feature I recently added was the ability to attach planes together, as seen here:


This is two planes attached together. Even though it looks like two planes, they are both affecting the physics of the unit as a whole. At any point I can release the top plane and they will both fly separately under their own rules. This could be used for example to attach a glider to plane and release at high altitude and glide down to the ground. Here is visual:

(click for gif))



Any number of planes can be combined and detached at any given point. Here is an early test of a failed contraption. When I released the plane on the left it immediately wanted to lift up into the other plane. I tried to fight it but it was hopeless for the most part:




Due to the modular nature of this system, it is not confined to planes. Here is an example of a fuselage-only contraption with a missile attachment being launched from it:

(click for gif)


The target being hit is a stack of boxes. The missile is using the exact same physics as a plane. It has a fuselage component for the body and two wings to maintain a steady flight path.


There are limits to this system when given improper parameters. As seen below, when you try to make a plane go too fast for its own good, it will blow apart due to the physics:

(click for gif)


Note that if this plane were built differently it would have no problem handling this kind of speed. For example, I have built missiles capable of reaching 3000m/s before exploding. It should also be noted that the threshold for explosion is a parameter in the code and can be increased or decreased.


Here are two fun example of the physics in play. In the first example, the 3 planes are released at the exact same time on an even flight path and they all do a loop and two of them end up colliding. The view is switched to the plane on top at the end. The second example is just a plane colliding with a pole and breaking apart:



(click for gif)



At the moment, all of these planes/missiles/contraptions are defined with text files. Eventually I would like to have some kind of fancy interface for building things.

I will have a link to a playable demo by the end of the week once I clean a few things up. I also intend for there to be a user generated content database that people can upload and download content to.

I have plenty more content to show, so please let me know if you would like to see more!

This is the Behemoth 2 (with lift/drag/etc lines on):



From my previous screenshots, it is the dual prop plane with 3 of the single prop planes attached to it.

This is an attempted barrel roll with only the primary planes engines running. If I have the attached planes engines running this is no problem.
barrel roll

Here is a shot of releasing the 3 smaller planes. They are all controllable after releasing, but it is very hard to fly 4 planes at once. And as you can see I should probably do this at higher elevation so I can pull up in time.
release

edit: just saw this happen.. after releasing the 3 planes they all end up doing a loop and come back to meet:

Crashing...

Some nice subtle things result from this crash, like the wing piece on the right flying into the tree, or the propellers taking off in different directions.

Neat!

What's up with the forces on the tailfin in the second gif? The drag looks like it's in the direction of the axis of the plane, rather than of the airflow.

Nice catch. That was a mistake in the code, which led to the horrible crash. There have been many seemingly small calculation errors which lead to disaster, those are the only two I caught on tape. Usually they would result in implosion or other game breaking events.

Some flight physics. Green is lift, yellow is weight, red is drag, blue is thrust, and magenta is velocity.

The gifs contain some early casualties of trial and error.

single prop


dual prop


cruise missile


crash and burn
http://www.czkproject.com/files/flight.gif
http://www.czkproject.com/files/flight2.gif

Playing with LICEcap.. thanks for the suggestion!

Still mostly prototyping ideas at this point...

What is the preferred software for making gifs?

Prototyping some things...



before http://i.imgur.com/s6kgeib.png
after http://i.imgur.com/QvlO8AA.png
boss http://i.imgur.com/cYgiHF7.jpg