User talk:Frolicking Zombie

Welcome! Hello, Frolicking Zombie, and welcome to RoboWiki! This place contains a wealth information about Robocode, from basic to more advanced. I hope you enjoy creating robots and being a robocoder! If you are posting a comment on this wiki, please sign your messages using four tildes (--~~~~); this will automatically insert your username and the date stamp. If you are not familiar with MediaWiki, these links might help you out: How to edit on Wikipedia, Cheatsheet and Reference Card of MediaWiki on the Meta Wikipedia. Readme page. If you need help, check out the frequently asked questions or ask it on this page. Again, welcome! —— Nat 15:07, 17 August 2009 (UTC)

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Mathematics	RoboCode Java	Explanation
<math>\text{targetError} = (\text{currentTime} - \text{lastScanTime} + 1)\times 8 + 18</math>	double targetError = (currentTime - targetLastScan + 1) * 8 + 18;	Calculate the maximum distance the enemy can possibly move according to the physics.
<math>\text{targetDistance} = \sqrt{(\text{targetX} - \text{myX})^2+(\text{targetY}-\text{myY})^2}</math>	double targetDistance = Math.sqrt( (targetX - myX) * (targetX - myX) + (targetY - myY) * (targetY - myY) );	Standard Euclidean distance formula for our distance to target.
<math>\angle\text{targetHeading} = \tan ^{-1}\left(\frac{\text{targetY}-\text{myY}}{\text{targetX}-\text{myX}}\right)</math>	double targetHeading = Math.atan2(targetX - myX, targetY - myY);	Robocode trigonometry has <math>\tan \theta = \frac{\cos \theta}{\sin \theta}</math>
<math>\text{x = }\pm \frac{1}{2} \sqrt{4 \text{targetError}^2-\frac{\text{targetError}^4}{\text{targetDistance}^2}}</math> <math>\text{y = }\frac{2 \text{targetDistance}^2-\text{targetError}^2}{2 \text{targetDistance}}</math>	double x = Math.sqrt( targetError * targetError - (targetError * targetError * targetError * targetError) / (targetDistance * targetDistance)) / 2; double y = (2 * targetDistance * targetDistance - targetError * targetError) / (2 * targetDistance);	The maximum angle that the enemy could have traveled is the intersection of the targetError and targetDistance circles.
<math>\angle\theta\text{ = }\tan ^{-1}\left(\frac{x}{y}\right)</math>	double theta = Math.atan2(y,x);	Calculate the maximum bearing that the enemy could have traveled.

<math>\angle\text{cwBoundHeading} = \angle\text{targetHeading}+\angle\theta</math>
<math>\angle\text{ccwBoundHeading} = \angle\text{targetHeading}-\angle\theta</math>

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Hey there! Wanna tell us what you're doing? Looks pretty interesting. =) « AaronR « Talk « 14:04, 16 August 2009 (UTC)

Looks really interesting... Do tell =) » Nat | Talk » 14:59, 16 August 2009 (UTC)

Hmm... looks like it's calculating some upper/lower bounds on the angle that an enemy bot could be at, in a melee environment where scans are infrequent --Rednaxela 16:20, 16 August 2009 (UTC)

Just working on this article over here before I move it. It's a minimal cost radar with some features for melee.