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POHow to create an "intercept missile" for a game?
 

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  1. POHow to create an "intercept missile" for a game?
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    <p>I have a game I am working on that has homing missiles in it. At the moment they just turn towards their target, which produces a rather dumb looking result, with all the missiles following the target around.</p> <p>I want to create a more deadly flavour of missile that will aim at the where the target "will be" by the time it gets there and I am getting a bit stuck and confused about how to do it.</p> <p>I am guessing I will need to work out where my target will be at some point in the future (a guess anyway), but I can't get my head around how far ahead to look. It needs to be based on how far the missile is away from the target, but the target it also moving. </p> <p>My missiles have a constant thrust, combined with a weak ability to turn. The hope is they will be fast and exciting, but steer like a cow (ie, badly, for the non HitchHiker fans out there).</p> <p>Anyway, seemed like a kind of fun problem for Stack Overflow to help me solve, so any ideas, or suggestions on better or "more fun" missiles would all be gratefully received.</p> <p>Next up will be AI for dodging them ...</p>
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    1. COBTW: you haven't mentioned whether your missiles are atmospheric or not. Do they use their control surfaces or their thrust to change their vector? The constant bearing simplification continues to work either way but you get different / interesting behaviors with atmospheric missiles at varying speeds. E.g., the Sidewinder immediately after launch is very much a snake trail of smoke, not so much immediately prior to impact.
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    2. COThe nickname "sidewinder" came from it's back and forth flight path... When first launched, it is slow, and it pulls a lot of lead to get to the collision course. As it accelerates, it needs less lead, and turns back towards the target. After the motor burns out and it begins decellerating, it pulls lead once again. The net result is a flight pat hand smoke trail that looks much like a rattlesnakes' sideways motion across the sand.
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      1. POHow to create an "intercept missile" for a game?
      1. USCharles Bretana
    3. COThis Sidewinder effect was one of the motivating factors behind adding the variable proportionality feature to radar guided missiles. It's pointless to pull extra lead early when closure is low, if you're going to speed up and need less lead anyway.. So, for radar missiles which 'know' the closure, they base missile rate of turn on closure and this causes them to pull less extra lead early when they are not going to need it later.
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