Translations for our friends around the world.

Author Topic: Reentry - An Orbital Simulator  (Read 9415 times)

0 Members and 1 Guest are viewing this topic.

Offline Asid

  • *
  • Posts: 22177
Re: Reentry - An Orbital Simulator
« Reply #60 on: July 25, 2020, 01:09:03 AM »
The short term plan
Fri, 24 July 2020

The main feature of the already released version 0.6 was the full rewrite of the integration layer between the rendering engine and the physics engine(s), something I call the True Scale System (TSS). The old integration logic was the weakest point of the simulator, and the benefits of its rewrite can clearly be seen and felt when playing Mercury. In addition, version 0.6 introduced a lot of new things to Mercury as well, making 0.6 one of the largest updates yet. The work surrounding the rewrite for TSS is immense, but well worth the efforts.

TSS for Gemini required new things to be solved, in addition to what was needed in Mercury: Rendezvous and Docking. Once this works well, the knowledge can be applied to add TSS to Apollo as well.

To avoid one large update for version 0.7, where Gemini is in focus, I will split the update into smaller and more focused releases, the first being version 0.65.

Version 0.65 will add TSS for Gemini. This means a complete overhaul of the physics integration. You will see a seamless ascent, properly scaled spacecraft relative to the Earth, and a complete rewrite of Rendezvous, Docking and EVA. I also added logic for better manual control during ascent for both Mercury and Gemini, and guidance improvements. Still a long way to go here, but it's a good start. In addition, new cores has been added to the OBC so you can configure roll amount during the Titan II roll program, and target inclination at insertion, and some panel modifications has been made.

The development of 0.65 is now complete, and has rolled out to the Test Pilots for testing. Version 0.65 is the basis of the work needed by 0.7X.

0.7 will as mentioned be split into multiple releases. The main features of 0.7 is the in-game Gemini Mission Editor, a new Gemini campaign as we saw in Mercury for 0.6, random and mission scripted failures for Gemini, first iteration of Virtual Reality for Gemini (what you see in Mercury now), Optics for Apollo, Trans-Earth Injection for Apollo, and the addition of the Mercury Control Center (multiplayer mission control).

Version 0.8 is the last major overhaul update targeting Apollo. After this, I can start focusing more on missing systems, game mechanics and languages, content and more historical missions. Historical missions needs the simulator to be as stable as possible (right now, game mechanics, mission definitions etc are changing for each update), and this is why there aren't so many of them in-game, and that those that are (MA-6) is broken.

Here are some screenshots from version 0.65.

Rendezvous and Docking has changed. It is now slightly harder to rendezvous as precision is key, but translating and maneuvering around a target vehicle is more natural, smoother and realistic. The radar is also re-made and more stable/usable. It's now your primary tool when rendezvousing, as well as the line of sight to the target vehicle.

EVA has been re-made and you can maneuver around using the Hand-Held Maneuvering Unit (HHMU). Once you exit the spacecraft, you are a completely independent physical body, and all thrusts you make will impact your orbit.

The initial Gemini crew models has been added. It's static as the other crew models, but once I complete the rigging work required, I can start looking into IK to make it interact with the cockpit and items.

A Cassette Player/Tape Recorder has also been added. It's just a very simple system so you can play the soundtrack of the game (select tracks), as well as your own custom music while making the long journey towards the Moon. This can also be used in Mercury and Gemini (but in reality, they did not have it onboard).

I hope that the 0.65 update will fix some of the major pain-points in Gemini, and make the game play much smoother and realistic.

I stand against Racism, Bigotry and Bullying

Offline Asid

  • *
  • Posts: 22177
Re: Reentry - An Orbital Simulator
« Reply #61 on: August 12, 2020, 12:09:08 AM »
Reentry has been updated to version 0.65 - TSS for Gemini
Tue, 11 August 2020

I'm happy to announce that Reentry has been update to version 0.65. This version contains all the preliminary Gemini features needed for the upcoming 0.7 update.

Feature list:
- Full rewrite of the integration layer between the rendering engine and the physics engine(s) aka. the True Scale System (TSS). This is the major part of the update.
- Seamless ascent
- Realistic docking and rendezvous
- New mandatory steps for aligning the Gemini inertial platform added to the preparations needed to launch Gemini into orbit.
- Manual ascent controls for Mercury and Gemini
- Gemini EVA placeholder has been replaced
- Gemini cockpit and panel modelling improvements
- Added the TC-50R (Cassette Player) to all spacecrafts. Use this to listen to the game soundtrack or add your own music (wav or ogg) to your journeys in space
- Basic Gemini crew models
- Overhaul of the Mercury and Gemini Rate Command flight modes, and the Mercury manual proportional flight mode
- Gemini Rendezvous Radar improvements
- Rendezvousing is now harder as you need to manually perform the final approach, but still more realistic, smooth and stable. The OBC is being worked on to give you better dV suggestions. In a future update, the rendezvous technique (currently Hohmann) will be replaced with a Trigger Angle Targeting method. This was the method used in Gemini and in the Lunar Module/CSM rendezvous after lunar ascent.
- 2 new Steam achievements added for Gemini
- Input binding available for Gemini and Apollo numeric keypad, as well as Plus, Minus, Enter, Proceed, Read Out, Clear, Reset, KeyRel, Verb and Noun - you can now use the keyboard to interact with the computer.

You can read more about the major features of 0.65 here:

The work towards 0.7 can finally begin. As mentioned in the post above, this includes a new Gemini campaign, the Gemini Mission Editor, prelimineary VR support in Gemini and some Apollo features. In addition, the work to bring Apollo over to the new TSS enabled engine will also begin.

Thanks a lot for your patience, your feedback, you bug reports, and to everyone who are part of the Official Reentry community at Discord (

A special thanks goes out to all the Test Pilots who has been testing these bits.

I stand against Racism, Bigotry and Bullying

Offline Asid

  • *
  • Posts: 22177
Re: Reentry - An Orbital Simulator
« Reply #62 on: August 30, 2020, 12:34:28 AM »
Patch Notes: Reentry has been updated to version 0.6535
Sat, 29 August 2020

First of all, thank you all for reporting issues and for contributing to the simulator. This patch had a long delay due to a blocking issue surrounding Rendezvous in Gemini. This bug was triggered by some major logic changes needed to fix a few if the issues reported.

However, we should be good to go again!

This patch aims to fix some of the critical issues reported from the 0.65 update, and has the following fixes:

- Infinite Roll Program Rates fixed during the ROLL PROGRAM on Gemini ascent.
- Bad save state in Gemini: Due to a bug, when loading a save state, the free play mission state was loaded instead.
- EVA offset position is fixed and you will spawn next to the spacecraft.
- Radar range and Encoder now works when docked.
- Mercury abort in Atlas had a bug that would bring the capsule into a proper orbit. This is now fixed can the campaign mission should be working agian.
- New feature: Launch Azimuth logic and inclination (see below).
- Exit button should be visible and longer scrollable main menu, for those using wide screen.
- Gemini thruster volume reduced.
- Agena engine is tuned down.
- Gemini FDAI sphere texture.

Still looking into some of the other bugs reported but this is a start.

New features:

Azimuth calculations (basics)
Special thanks to pclaurent for helping me with the new azimuth calculations logic. This is just a start, and will be the basis for improved ascent guidance algorithms.
Using the OBC, can you insert the target inclination into the OBC Core 09, and it will automatically calculate the roll needed in the roll program, and reconfigure the OBC (Core 10 and 11). You will need to run the pre-launch program to align the platform. Keep in mind that the target inclination can not be less than your launch latitude, and should not deviate too much from 28.5 and 32.5.

Ap, Pe and ascending/descending node markers in Gemini orbit view
New markers are placed to easier visualize where the orbits apogee and perigee is located. These points are important as they are used to move the point on to opposite side of the orbit in or out. The ascending and descending nodes are the points where it's best to perform inclination/plane changes. These are still WIP, but I wanted to start testing the logic.

If the IVIs show a dV in the middle field (plane change), you should null this at the ascending or descending node.

I stand against Racism, Bigotry and Bullying

Offline Asid

  • *
  • Posts: 22177
Re: Reentry - An Orbital Simulator
« Reply #63 on: September 03, 2020, 02:48:36 PM »
Reentry has been patched to version 0.6540.EA
Wed, 2 September 2020

A minor patch has rolled out to fix some issues surrounding a redundant realism setting, and correcting that the Jukebox is visible by default.

The Jukebox should now be invisible when starting a mission, and this should be the correct behavior. If it's still visible for some of you, please let me know.

The "Simplified Rendezvous" realism setting is now redundant, and will be redefined soon. This setting caused an issue with the orbit and rendezvous logic in Gemini (Ap and Pe suddenly jumping back to their initial values on burn completion). This should now be fixed, but I would still untoggle the setting.

Thanks again for reporting!

I stand against Racism, Bigotry and Bullying

Offline Asid

  • *
  • Posts: 22177
Re: Reentry - An Orbital Simulator
« Reply #64 on: October 18, 2020, 03:55:08 AM »
Reentry has been updated to 0.707!
Sat, 17 October 2020

This is the first iteration of the 0.7 updates. 0.7 has been split into multiple parts to avoid having too big updates with too many features.

The next few iterations will hopefully cover VR for Gemini, TSS for Apollo, and the Mercury Control Center.

Many of the Gemini Systems and physics has received an overhaul, such as pressure and a full electricity system overhaul. A Gemini Mission will now feel much more immersive and realistic (especially if you perform the full procedure from T-90 minutes - see the new campaign!). There are still things in the works, and things waiting for feedback, but this will evolve. Abort modes are also introduced (both ejection seat (just for fun) and spacecraft aborts), but not yet complete.

The new Gemini Campaign will take you through many of the new features. Some slight changes have been made to the Mercury campaign as well. The Campaign will be open sourced at, so you can see how it was made.

There are multiple graphics improvements in Project Gemini. The cockpit has received some new things and changes, as well as the Gemini external model.

Gemini can now load custom panel states such as Cold and Dark. This can be done in the Mission Editor, or by using the Console.

Preliminary failures are added to Gemini, but this will have a bigger focus in the next few updates. It works as in version 0.6 for Mercury.

The Gemini Mission Editor has been integrated into the game and can be used to create missions!

You can now use the Live Feed setting (check SETTINGS) to output the displays of the OBC, AGC, and LGC to files. They are saved as JSON and located in the export folder under AppData for Reentry. This can be used to display its data on external IoT devices etc.

I stand against Racism, Bigotry and Bullying