ACE3/documentation/feature/advanced_ballistics.md

---
layout: wiki
title: Advanced Ballistics
group: feature
parent: wiki
---
# Overview
## Advanced ballistics simulation
The advanced ballistics module improves projectile physics by simulating internal and external ballistics. Factors used in the simulation include:

- Ambient air pressure, temperature and humidity
- Wind drift
- [Magnus effect](https://en.wikipedia.org/wiki/Magnus_effect) (spin drift)
- [Coriolis effect](https://en.wikipedia.org/wiki/Coriolis_effect) and [Eötvös effect](https://en.wikipedia.org/wiki/Eotvos_effect) (Earth rotation)
- Loss of stability during transonic flight 
- Variable muzzle velocity based on on powder burn rate and barrel length
- Barrel length effect on muzzle velocity

## Advanced drag model
Realistic drag modeling based on the G Model and real-world ballistic coefficient data.

## Wind simulation
Wind speed varies with altitude. Terrain features, buildings and other objects disrupt the wind.

## Bullet trace effects
Supersonic bullets have a refraction effect due to air pressure waves.

## Protractor
Adds a protractor for quickly measuring inclination angle.

# Usage
Press <kbd>Ctrl</kbd>+<kbd>Shift</kbd>+<kbd>K</kbd> while using a compatible weapon to toggle the protractor. The red line indicates the current inclination angle in degrees. The protractor will disappear if you lower or holster your weapon.

This module uses relatively complex scripting. Several options are provided in the ACE menu to reduce the performance impact of this module.

# Dependencies
`ace_ballistics`, `ace_weather`, `ace_modules`
Create missing documentation placeholders Creates placeholder documentation for modules which did not previously have any. If a module had the same name and apparent purpose as a module from AGM, AGM's documentation was imported into the placeholder. These documentation are useful to users for explaining what ACE3 changes. They are also useful to community admins who want to create a custom distribution of ACE3 and need to know which modules to disable. The documentation needs to be significantly fleshed out before it's ready for public consumption, but this should be a helpful start. 2015-05-13 00:28:18 +00:00			`---`
			`layout: wiki`
			`title: Advanced Ballistics`
			`group: feature`
			`parent: wiki`
			`---`
			`# Overview`
Improve ballistics/advanced ballistics docs 2015-05-14 05:20:36 +00:00			`## Advanced ballistics simulation`
Improve ballistics documenation Thanks @ulteq and vking for feedback and help 2015-05-14 21:30:50 +00:00			`The advanced ballistics module improves projectile physics by simulating internal and external ballistics. Factors used in the simulation include:`
Improve advanced ballistics documenation Incorporated feedback from @ulteq 2015-05-14 20:27:09 +00:00
			`- Ambient air pressure, temperature and humidity`
			`- Wind drift`
			`- [Magnus effect](https://en.wikipedia.org/wiki/Magnus_effect) (spin drift)`
			`- [Coriolis effect](https://en.wikipedia.org/wiki/Coriolis_effect) and [Eötvös effect](https://en.wikipedia.org/wiki/Eotvos_effect) (Earth rotation)`
			`- Loss of stability during transonic flight`
Improve ballistics documenation Thanks @ulteq and vking for feedback and help 2015-05-14 21:30:50 +00:00			`- Variable muzzle velocity based on on powder burn rate and barrel length`
			`- Barrel length effect on muzzle velocity`
Improve advanced ballistics documenation Incorporated feedback from @ulteq 2015-05-14 20:27:09 +00:00
			`## Advanced drag model`
			`Realistic drag modeling based on the G Model and real-world ballistic coefficient data.`

			`## Wind simulation`
			`Wind speed varies with altitude. Terrain features, buildings and other objects disrupt the wind.`
Improve ballistics/advanced ballistics docs 2015-05-14 05:20:36 +00:00
Improve ballistics documenation Thanks @ulteq and vking for feedback and help 2015-05-14 21:30:50 +00:00			`## Bullet trace effects`
			`Supersonic bullets have a refraction effect due to air pressure waves.`

Improve ballistics/advanced ballistics docs 2015-05-14 05:20:36 +00:00			`## Protractor`
Improve ballistics documenation Thanks @ulteq and vking for feedback and help 2015-05-14 21:30:50 +00:00			`Adds a protractor for quickly measuring inclination angle.`
Create missing documentation placeholders Creates placeholder documentation for modules which did not previously have any. If a module had the same name and apparent purpose as a module from AGM, AGM's documentation was imported into the placeholder. These documentation are useful to users for explaining what ACE3 changes. They are also useful to community admins who want to create a custom distribution of ACE3 and need to know which modules to disable. The documentation needs to be significantly fleshed out before it's ready for public consumption, but this should be a helpful start. 2015-05-13 00:28:18 +00:00
			`# Usage`
Improve ballistics documenation Thanks @ulteq and vking for feedback and help 2015-05-14 21:30:50 +00:00			`Press <kbd>Ctrl</kbd>+<kbd>Shift</kbd>+<kbd>K</kbd> while using a compatible weapon to toggle the protractor. The red line indicates the current inclination angle in degrees. The protractor will disappear if you lower or holster your weapon.`
Improve ballistics/advanced ballistics docs 2015-05-14 05:20:36 +00:00
			`This module uses relatively complex scripting. Several options are provided in the ACE menu to reduce the performance impact of this module.`
Create missing documentation placeholders Creates placeholder documentation for modules which did not previously have any. If a module had the same name and apparent purpose as a module from AGM, AGM's documentation was imported into the placeholder. These documentation are useful to users for explaining what ACE3 changes. They are also useful to community admins who want to create a custom distribution of ACE3 and need to know which modules to disable. The documentation needs to be significantly fleshed out before it's ready for public consumption, but this should be a helpful start. 2015-05-13 00:28:18 +00:00
			`# Dependencies`
Improve ballistics/advanced ballistics docs 2015-05-14 05:20:36 +00:00			`ace_ballistics`, `ace_weather`, `ace_modules`