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Boids Troubles - Help Please
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Joined: Sat Feb 03, 2007 7:11 pm Posts: 1496 
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  Boids Troubles - Help PleaseSo basically what it tries to do is create 4 boids when you fire (including self).
But after a little bit of boiding around, they all drift apart from eachother, even though you can see the muzzleflashes are pointing in different directions than where they are drifting. Why does the emitting suddenly stop pushing the emitter? Attachments:
File comment: This is a little more complicated than just showing you the code.
Boids.rte.rar [3.02 KiB]
Downloaded 213 times |
| Fri Jul 31, 2009 9:18 pm |
 
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 Joined: Sun May 31, 2009 1:04 am Posts: 308
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Re: Boids Troubles - Help Please This is the only emission that I saw with a PushesEmitter = 1. It's set to stop emitting after 3 seconds.
Code: AddEmission = Emission EmittedParticle = MOPixel CopyOf = Air Blast ParticlesPerMinute = 2000 StartTimeMS = 500 StopTimeMS = 3000 BurstSize = 2 Spread = 0.5 MaxVelocity = 3 MinVelocity = 3 PushesEmitter = 1 |
| Sat Aug 01, 2009 7:17 am |
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Joined: Sat Feb 03, 2007 7:11 pm Posts: 1496
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Re: Boids Troubles - Help Please Awesome. It works!
Btw is there a way to make them just Orient to Velocity upon spawning so I won't have to use that "OrienttoVel" variable that messes it up? |
| Mon Aug 03, 2009 5:42 pm |
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 Joined: Fri May 11, 2007 4:30 pm Posts: 1040 Location: England
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Re: Boids Troubles - Help Please in function create(Self)
self.RotAngle = math.atan(self.Vel.X/self.Vel.Y); ? |
| Mon Aug 03, 2009 6:14 pm |
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Joined: Sat Feb 03, 2007 7:11 pm Posts: 1496
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Re: Boids Troubles - Help Please Cool, all I need to do is make it so you can dynamically keep adding Boids to the system.
Thanks guys *Off to learn tables and stuff*. |
| Tue Aug 04, 2009 4:02 am |
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Joined: Sat Feb 03, 2007 7:11 pm Posts: 1496
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Re: Boids Troubles - Help Please How can I go through an Array/Table and add together all of
a variable from the objects from that table so then I can divide that by the number of objects in the table?  |
| Tue Aug 04, 2009 6:20 am |
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REAL AMERICAN HERO  Joined: Sat Jan 27, 2007 10:25 pm Posts: 5655
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Re: Boids Troubles - Help Please for pointer in table do
local sum = sum + pointer.value; local average = sum / getn(table); end |
| Tue Aug 04, 2009 6:58 am |
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Joined: Sat Feb 03, 2007 7:11 pm Posts: 1496
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Re: Boids Troubles - Help Please Code: function Create(self) if BoidList == nil then BoidList = { }; end self.ListNumber = #BoidList + 1; BoidList[#BoidList + 1] = self; local DirAway = 0; local AvgDir = 0; local targetdir = 0; local DirSum = 0; local PosSum = 0; self.RotAngle = math.atan(self.Vel.X/self.Vel.Y); end function Update(self) for i=1, #BoidList do if MovableMan:IsParticle(BoidList[i]) then for Particle in BoidList do local avgx = Particle.Pos.X - self.Pos.X; local avgy = Particle.Pos.Y - self.Pos.Y; local dist = math.sqrt(avgx ^ 2 + avgy ^ 2); if dist < 20 then DirAway = -(math.atan2(-(Particle.Pos.Y-self.Pos.Y),(Particle.Pos.X-self.Pos.X))); end end local DirSum = 0; DirSum = DirSum + BoidList[i].RotAngle; AvgDir = DirSum / #BoidList; local PosSum = 0; PosSum = PosSum + BoidList[i].Pos; AvgPos = PosSum / #BoidList; local DirToCenter = math.atan2(-(AvgPos.Y-self.Pos.Y),(AvgPos.X-self.Pos.X)); local targetdir = (DirToCenter + AvgDir + DirAway) / 3; if targetdir ~= self.RotAngle then self.RotAngle = targetdir; end --Make sure the missile's thruster is firing. if self:IsEmitting() == false then self:EnableEmission(true); end end end end function Destroy(self) BoidList[self.ListNumber] = nil; end "Attempted to get Value from Table! Line 21" I want it to get a value from a table! Why is that so wrong?! Btw Line 21 is: Code: for Particle in BoidList do |
| Tue Aug 04, 2009 5:20 pm |
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 Joined: Thu Mar 06, 2008 10:54 pm Posts: 1360 Location: USA
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Re: Boids Troubles - Help Please Pretty sure it needs to be self.BoidList, not just BoidList
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| Tue Aug 04, 2009 6:04 pm |
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Joined: Sat Feb 03, 2007 7:11 pm Posts: 1496
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Re: Boids Troubles - Help Please Well, I managed to fix the above piece of code using some TLB magic, but there are still some problems.
 http://i34.photobucket.com/albums/d144/ ... ump020.jpg I fixed the table part, but didn't touch anything else, so what's up? |
| Tue Aug 04, 2009 10:33 pm |
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Joined: Sat Feb 03, 2007 7:11 pm Posts: 1496
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Re: Boids Troubles - Help Please More progress, still broken:
Code: function Create(self) if BoidList == nil then BoidList = { }; end self.ListNumber = #BoidList + 1; BoidList[#BoidList + 1] = self; local DirAway = 0; local AvgDir = 0; local targetdir = 0; local DirSum = 0; local PosSum = Vector(0,0); -- local PosSum.X = 0; -- local PosSum.Y = 0; local AvgPos = Vector(0,0); -- local AvgPos.X = 0; -- local AvgPos.Y = 0; self.RotAngle = math.atan(self.Vel.X/self.Vel.Y); end function Update(self) for i=1, #BoidList do if MovableMan:IsParticle(BoidList[i]) then local avgx = BoidList[i].Pos.X - self.Pos.X; local avgy = BoidList[i].Pos.Y - self.Pos.Y; local dist = math.sqrt(avgx ^ 2 + avgy ^ 2); if dist < 20 then DirAway = -(math.atan2(-(BoidList[i].Pos.Y-self.Pos.Y),(BoidList[i].Pos.X-self.Pos.X))); end local DirSum = 0; DirSum = DirSum + BoidList[i].RotAngle; AvgDir = DirSum / #BoidList; local PosSum = Vector(0,0); -- PosSum = PosSum + BoidList[i].Pos; PosSum.X = PosSum.X + BoidList[i].Pos.X; PosSum.Y = PosSum.Y + BoidList[i].Pos.Y; -- AvgPos = PosSum / #BoidList; AvgPos.X = PosSum.X / #BoidList; AvgPos.Y = PosSum.Y / #BoidList; local DirToCenter = math.atan2(-(AvgPos.Y-self.Pos.Y),(AvgPos.X-self.Pos.X)); local targetdir = (DirToCenter + AvgDir + DirAway) / 3; if targetdir ~= self.RotAngle then self.RotAngle = targetdir; end --Make sure the missile's thruster is firing. if self:IsEmitting() == false then self:EnableEmission(true); end end end end function Destroy(self) BoidList[self.ListNumber] = nil; end Line 39 Attempting to call Global PosSum (A nil Value!) Line 39: PosSum.X = PosSum.X + BoidList[i].Pos.X;  |
| Thu Aug 06, 2009 6:43 am |
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REAL AMERICAN HERO Joined: Sat Jan 27, 2007 10:25 pm Posts: 5655
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Re: Boids Troubles - Help Please A local created in create is only accessible in create afaik.
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| Thu Aug 06, 2009 2:27 pm |
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 Joined: Sun Jul 13, 2008 9:57 am Posts: 4886 Location: some compy
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Re: Boids Troubles - Help Please use self.PosSum instead of local.
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| Thu Aug 06, 2009 9:37 pm |
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Joined: Fri May 11, 2007 4:30 pm Posts: 1040 Location: England
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Re: Boids Troubles - Help Please only use local if you only want the variable to be accessed in the if loop it is in as it gets deleted at the end of the loop.
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| Fri Aug 07, 2009 7:57 pm |
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REAL AMERICAN HERO Joined: Sat Jan 27, 2007 10:25 pm Posts: 5655
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Re: Boids Troubles - Help Please *block but hey who's counting
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| Fri Aug 07, 2009 9:38 pm |
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