NetLogo Models Library:
Sample Models/Games/Unverified

Note: This model is unverified. It has not yet been tested and polished as thoroughly as our other models.

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Projectile Attack

Run Projectile Attack in your browser uses NetLogo 5.0.1 requires Java 5 or higher (system requirements) Note: If you download the NetLogo application, every model in the Models Library (besides the Community Models) is included. If you have trouble running this model in your browser, you may wish to download the application instead.

## WHAT IS IT?

This model is based on the classic game Tank Wars. Players must adjust angle and power of fire to hit a target with a projectile. Several factors, including gravity and wind must be taken into account.

## HOW IT WORKS

The warhead is fired and moves ballistically towards its target.

## HOW TO USE IT

The SETUP button creates a new randomly-positioned target and obstacle wall.

The GO button causes the game logic to be active and must be pressed anytime the game is in play.

The FIRE button launches the projectile with the currently specified parameters.

The WIND slider adjusts the direction and magnitude of the wind.

Properties of the obstacle wall can be configured including its height (WALL-HEIGHT slider), it's location (WALL-POSITION slider), and what effect it has on wind (WALL-BLOCKS-WIND? switch)

## THINGS TO TRY

Try to hit the target!

## NETLOGO FEATURES

This model uses the `tie` command for links, to conveniently make it so that changing the heading of the tank causes its gun to swivel and the "aiming arrow" to also swivel.

This model also fakes having no ceiling to the world, by having the shell (projectile) wrap around to the bottom of the view, but it is hidden until it comes back down again.

## RELATED MODELS

Lunar Lander

## CREDITS AND REFERENCES

Thanks to James Newell for his work on this model.

## HOW TO CITE

If you mention this model in a publication, we ask that you include these citations for the model itself and for the NetLogo software:
- Wilensky, U. (2008). NetLogo Projectile Attack model. http://ccl.northwestern.edu/netlogo/models/ProjectileAttack. Center for Connected Learning and Computer-Based Modeling, Northwestern University, Evanston, IL.
- Wilensky, U. (1999). NetLogo. http://ccl.northwestern.edu/netlogo/. Center for Connected Learning and Computer-Based Modeling, Northwestern University, Evanston, IL.

## COPYRIGHT AND LICENSE

Copyright 2008 Uri Wilensky.


This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/ or send a letter to Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.

Commercial licenses are also available. To inquire about commercial licenses, please contact Uri Wilensky at uri@northwestern.edu.

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