Inconsistent collision results.

[Saerothir]

Hello everyone,

So I’ve found a collision problem today while experimenting with a few things and I need some assistance fixing it.

Here is a video showing exactly what’s happening:
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(refer to the video posted below, in the comments section)

Like I say in the video, I don’t understand why the tank’s collision function always works but PTmine’s collision function is only executed some of the time…?
They are formatted very much the same.

Any help would be greatly appreciated.

-Saer

P.S. I had to end the video 'because of my dog (as you probably heard) and I didn’t want to record the video again, so if you need me to elaborate more on something let me know.

[Saerothir]

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[Saerothir]

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[Saerothir]

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[Saerothir]

Actually I’m not going to change my setup

1. because I don’t know what I would change.
2. Going back to #1 It is formatted just fine so I don’t see why I should change it.

Anyways, here are both my functions for creating&shooting a player/user bullet and my setup for creating a PTmine:

– PTmine –

local function PTMBtnSetAlpha(event) &nbsp;&nbsp;&nbsp; PTMBtn.alpha = 1 &nbsp;end -- Create PTmine local function buildPTmine() &nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; local PTmineG = display.newGroup() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.PTmineTmr = timer.performWithDelay() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.PTmineBWtmr = timer.performWithDelay() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; --PTMBtn.alpha = .7 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; print( "creating PTmine" ) &nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.body = loader:createSpriteFromSHDocument("PTmine", "GameFX", "LevelAssets.pshs"); &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; physics.addBody( PTmineG.body , "dynamic", { friction= 0, bounce= 1.0, density= .6, radius= 10, isSensor = true, filter = PTmineCollisionFilter} ); &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.body.x = user\_tank.x; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.body.y = user\_tank.y + 5; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.body:scale(.2,.2) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.body.class = "PTmine" &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ------------------------------------------------------------------------ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -- Blow up PTmine function &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; function ExplodeMine(self) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; --local parentMine = PTmines[self.\_index] &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineCount = PTmineCount - 1 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; print(" PTmineCount:&nbsp;&nbsp;&nbsp; "&nbsp; .. PTmineCount) &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ExplosionEmitter = Particles.GetEmitter("ExplosionEmitter") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ExplosionEmitter.x = self.x &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ExplosionEmitter.y = self.y &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Particles.StartEmitter("ExplosionEmitter") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.BW = display.newCircle(self.x, self.y, 10) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.BW.isVisible = false &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.BW.class = "PTmineBW" &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -- increases PTmine's radius to act as a type of blast-wave, and then checks for collisions using the 'onPTmineBWCollision' funciton &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; physics.addBody(PTmineG.BW, "dynamic", {radius = 60, isSensor = true}) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; print("PTmineBW size increased") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG:insert( PTmineG.BW ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.BW.\_index = PTmineG.body.\_index &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -- remove PTmineBW &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; function removeBW() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; display.remove(PTmineG.BW) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; print("No collisions registered with the BW. BW removed") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -- Collision detection function for PTmineBW &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; local onPTmineBWCollision = function(self, event) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if event.phase == "began" and event.other.class == "Dbarrier" then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if PTmineG.PTmineBWtmr then timer.cancel(PTmineG.PTmineBWtmr) end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; print("BW hit PlayerTank") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; display.remove(self) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; display.remove(event.other) &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return true &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.BW.collision = onPTmineBWCollision &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.BW:addEventListener( "collision", PTmineG.BW )&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.PTmineBWtmr = timer.performWithDelay(15, removeBW) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; display.remove(self) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp; end &nbsp;&nbsp;&nbsp; ---------------------------------------------------------------------------- &nbsp;&nbsp;&nbsp; -- Collision function for PTmineG &nbsp;&nbsp;&nbsp; local onPTmineGCollision = function(self, event) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; local parentMine = PTmines[self.\_index] &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if ( event.phase == "began" and&nbsp; event.other.class == "bullet" or event.other.class == "EnemyBullet" ) then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if PTmineG.PTmineTmr then timer.cancel(PTmineG.PTmineTmr) end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; print("PTmineG.PTmineTmr stopped.") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; print("PlayerBulletCount:&nbsp; " .. PlayerBulletCount) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PlayerBulletCount = PlayerBulletCount - 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Particles.DeleteEmitter(event.other.emitterRef) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; display.remove(event.other) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; timer.performWithDelay(5, function() ExplodeMine( PTmineG.body )end, 1) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return true &nbsp;&nbsp;&nbsp; end &nbsp;&nbsp;&nbsp; PTmineG.body.collision = onPTmineGCollision &nbsp;&nbsp;&nbsp; PTmineG.body:addEventListener("collision", PTmineG.body) &nbsp;&nbsp;&nbsp; PTmineG.PTmineTmr = timer.performWithDelay(6000, function() ExplodeMine(PTmineG.body) end, 1) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ------------------------------------------------------------------------ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; camera:add( PTmineG, 7, false ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG:insert( PTmineG.body ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; table.insert(PTmines, PTmineG) &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.body.\_index = table.indexOf(PTmines, PTmineG) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp; return PTmineG&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; &nbsp; end -- on PTmine button release local function onPTMBtnRelease(event) &nbsp; &nbsp;if PTmineCount \<= 1 then &nbsp;&nbsp;&nbsp; PTmineCount = PTmineCount + 1 &nbsp;&nbsp;&nbsp; print(" PTmineCount:&nbsp;&nbsp;&nbsp; "&nbsp; .. PTmineCount) &nbsp; &nbsp;&nbsp;&nbsp; timer.performWithDelay(10, buildPTmine) &nbsp;&nbsp;&nbsp; elseif PTmineCount == 2 then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; print("Already two mines present. End function.") &nbsp;&nbsp;&nbsp; end end PTMBtn = widget.newButton{&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp; defaultFile = "GUI\_assets/But\_shooting.png", &nbsp;&nbsp;&nbsp; overFile = "GUI\_assets/But\_shooting-over.png", &nbsp;&nbsp;&nbsp; onPress = PTMBtnSetAlpha, &nbsp;&nbsp;&nbsp; onRelease = onPTMBtnRelease&nbsp;&nbsp;&nbsp; -- Event listener function &nbsp;&nbsp;&nbsp; } &nbsp;&nbsp;&nbsp; PTMBtn:setReferencePoint( display.CenterReferencePoint ); &nbsp;&nbsp;&nbsp; PTMBtn.x = 935; PTMBtn.y = 675; &nbsp;&nbsp;&nbsp; PTMBtn:scale(.755, .755); &nbsp;&nbsp;&nbsp; PTMBtn.alpha = .7 &nbsp; &nbsp; PTMBtnbgi = display.newImage("GUI\_assets/Bg\_shooting.png") PTMBtnbgi.x = PTMBtn.x; PTMBtnbgi.y = PTMBtn.y; PTMBtnbgi:scale(.4, .4)&nbsp; &nbsp; local function onPTMBtnTap( event ) &nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp; local T = event.target&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp; if (event.phase == "began") then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; display.getCurrentStage():setFocus( T, event.id ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; T.isFocus = true&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; CreatePTmine() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; elseif event.phase == "ended" then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; display.getCurrentStage():setFocus( T, nil) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; T.isFocus = false &nbsp; &nbsp;&nbsp;&nbsp; end &nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp; return true; end --Adds an event listener to the transRect PTMBtn:addEventListener( "tap", onPTMBtnTap ) &nbsp;

– user bullet –

local function shootBullet()       audio.play( tank\_shot )            local bullet = display.newGroup()       PlayerBulletCount = PlayerBulletCount + 1       print("PlayerBulletCount increased by 1")              emitterCount = emitterCount + 1         local pt = mathapi.rotateAboutPoint( {x=user\_turret.x,y=user\_turret.y-47}, user\_turret, user\_turret.rotation - 90 )                  -- In bullet fire function       local emitterName = "E" .. emitterCount         local Emitter = display.newGroup()       --bullet attributes           bullet.body = loader:createSpriteFromSHDocument("Weapon3ex", "GameFX", "LevelAssets.pshs");       bullet.body.x = pt.x; bullet.body.y = pt.y;       physics.addBody( bullet.body , "dynamic", { friction= 0, bounce= 1.0, density= .6, radius= 7, filter = bulletCollisionFilter} );       bullet.body:scale(.63,.57);                bullet.body.class = "bullet"       bullet.body.isBullet = true                bullet.body.rotation = user\_turret.rotation + 90       bullet.body:applyForce( pt.x - user\_turret.x, pt.y - user\_turret.y, user\_turret.x, user\_turret.y )             -- Bullet Emitter       Particles.CreateEmitter(emitterName, 0, 0, 0, false, true) -- Uses the base name (generated dynamically with each tank)       bullet.body.emitter = Particles.GetEmitter(emitterName)       bullet.body.emitterRef = emitterName                       Particles.CreateParticleType ("PBulletSTrail",             {             imagePath              = "gfx/smoke01.png",             imageWidth             = 10,                 imageHeight            = 12,                 directionVariation     = 45,             velocityVariation      = 50,             rotationVariation      = 360,             rotationChange         = 30,             useEmitterRotation     = false,             alphaStart             = 1,             fadeInSpeed            = 1.5,             fadeOutSpeed           = .5,             fadeOutDelay           = 100,             scaleStart             = .5,             scaleVariation         = 1,             scaleInSpeed           = .5,             emissionShape          = 1,             emissionRadius         = 1,             killOutsideScreen      = true,             lifeTime               = 150,             blendMode              = "subtract",             } )                  Particles.AttachParticleType(emitterName , "PBulletSTrail",  32, 99999,0)                  local R = 153         local G = 153         local B = 153         Particles.SetParticleProperty("PBulletSTrail", "colorStart", {R,G,B})         local function attachBEmitters()                       if BEmitters then                                  print( "Number of Emitters: " .. tostring( #BEmitters ) )                 if #BEmitters~=0 then                              Particles.SetEmitterTarget( emitterName, bullet.body, true, 0, 0, 0 )                     Particles.StartEmitter(emitterName)                 end             end           return Emitter                 end         for i=1,1 do             BEmitters[#BEmitters + 1] = attachBEmitters()         end         timer.performWithDelay(10, attachBEmitters)        local onPlayerBulletCollision = function(self, event)                     local parentObject = PlayerBullets[self.\_index]                                 if (event.phase == "began") then                                  if (event.other.class == "EnemyBullet") then                          print("PlayerBulletCount decreased by 1")                     PlayerBulletCount = PlayerBulletCount - 1                     EnemyBulletCount = EnemyBulletCount - 1                                              Particles.DeleteEmitter(event.target.emitterRef)                                Particles.DeleteEmitter(event.other.emitterRef)                                display.remove(self)                     display.remove(event.other)                     print(" Projectile Removed ")                              end                                       elseif (event.phase == "ended") then                              PlayerBulletCount = PlayerBulletCount - 1                 Particles.DeleteEmitter(event.target.emitterRef)                            display.remove(self)                              end         return true       end       bullet.body.collision = onPlayerBulletCollision       bullet.body:addEventListener("collision", bullet.body)             bullet:insert( bullet.body )       bullet:insert( bullet.body.emitter )       camera:add(bullet, 2, false)             table.insert(PlayerBullets, bullet)             bullet.body.\_index = table.indexOf(PlayerBullets, bullet)       bullet.body.emitter.\_index = bullet.body.\_index            return bullet       end  

Maybe there is an error in my code somewhere that is causing the collisions to conflict.

-Saer

Edit: Hopefully you’ll be able to read the code fine… the way this forum formats code is atrocious.

[Saerothir]

A more in-depth video explaining the situation, for some people on IRC who are helping me out as well as anyone else who may be interested: (problem solved, video removed)

[Saerothir]

I guess I should explain how I solved the problem.
Rather than adding a circular physics-body to the bullet and mine directly in-code, I created a complex-physics body (using SpriteHelper) and that fixed it.
Now whenever a mine comes in contact with a bullet, the mine’s collision function is executed.

I didin’t know collision-detection was so sensitive. I’ll definitely be more careful how I code collisions in the future.

Cheers!

-Saer

[Saerothir]

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[Saerothir]

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[Saerothir]

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[Saerothir]

Actually I’m not going to change my setup

1. because I don’t know what I would change.
2. Going back to #1 It is formatted just fine so I don’t see why I should change it.

Anyways, here are both my functions for creating&shooting a player/user bullet and my setup for creating a PTmine:

– PTmine –

local function PTMBtnSetAlpha(event) &nbsp;&nbsp;&nbsp; PTMBtn.alpha = 1 &nbsp;end -- Create PTmine local function buildPTmine() &nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; local PTmineG = display.newGroup() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.PTmineTmr = timer.performWithDelay() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.PTmineBWtmr = timer.performWithDelay() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; --PTMBtn.alpha = .7 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; print( "creating PTmine" ) &nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.body = loader:createSpriteFromSHDocument("PTmine", "GameFX", "LevelAssets.pshs"); &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; physics.addBody( PTmineG.body , "dynamic", { friction= 0, bounce= 1.0, density= .6, radius= 10, isSensor = true, filter = PTmineCollisionFilter} ); &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.body.x = user\_tank.x; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.body.y = user\_tank.y + 5; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.body:scale(.2,.2) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.body.class = "PTmine" &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ------------------------------------------------------------------------ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -- Blow up PTmine function &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; function ExplodeMine(self) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; --local parentMine = PTmines[self.\_index] &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineCount = PTmineCount - 1 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; print(" PTmineCount:&nbsp;&nbsp;&nbsp; "&nbsp; .. PTmineCount) &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ExplosionEmitter = Particles.GetEmitter("ExplosionEmitter") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ExplosionEmitter.x = self.x &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ExplosionEmitter.y = self.y &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Particles.StartEmitter("ExplosionEmitter") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.BW = display.newCircle(self.x, self.y, 10) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.BW.isVisible = false &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.BW.class = "PTmineBW" &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -- increases PTmine's radius to act as a type of blast-wave, and then checks for collisions using the 'onPTmineBWCollision' funciton &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; physics.addBody(PTmineG.BW, "dynamic", {radius = 60, isSensor = true}) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; print("PTmineBW size increased") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG:insert( PTmineG.BW ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.BW.\_index = PTmineG.body.\_index &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -- remove PTmineBW &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; function removeBW() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; display.remove(PTmineG.BW) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; print("No collisions registered with the BW. BW removed") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -- Collision detection function for PTmineBW &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; local onPTmineBWCollision = function(self, event) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if event.phase == "began" and event.other.class == "Dbarrier" then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if PTmineG.PTmineBWtmr then timer.cancel(PTmineG.PTmineBWtmr) end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; print("BW hit PlayerTank") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; display.remove(self) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; display.remove(event.other) &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return true &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.BW.collision = onPTmineBWCollision &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.BW:addEventListener( "collision", PTmineG.BW )&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.PTmineBWtmr = timer.performWithDelay(15, removeBW) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; display.remove(self) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp; end &nbsp;&nbsp;&nbsp; ---------------------------------------------------------------------------- &nbsp;&nbsp;&nbsp; -- Collision function for PTmineG &nbsp;&nbsp;&nbsp; local onPTmineGCollision = function(self, event) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; local parentMine = PTmines[self.\_index] &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if ( event.phase == "began" and&nbsp; event.other.class == "bullet" or event.other.class == "EnemyBullet" ) then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if PTmineG.PTmineTmr then timer.cancel(PTmineG.PTmineTmr) end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; print("PTmineG.PTmineTmr stopped.") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; print("PlayerBulletCount:&nbsp; " .. PlayerBulletCount) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PlayerBulletCount = PlayerBulletCount - 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Particles.DeleteEmitter(event.other.emitterRef) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; display.remove(event.other) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; timer.performWithDelay(5, function() ExplodeMine( PTmineG.body )end, 1) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return true &nbsp;&nbsp;&nbsp; end &nbsp;&nbsp;&nbsp; PTmineG.body.collision = onPTmineGCollision &nbsp;&nbsp;&nbsp; PTmineG.body:addEventListener("collision", PTmineG.body) &nbsp;&nbsp;&nbsp; PTmineG.PTmineTmr = timer.performWithDelay(6000, function() ExplodeMine(PTmineG.body) end, 1) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ------------------------------------------------------------------------ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; camera:add( PTmineG, 7, false ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG:insert( PTmineG.body ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; table.insert(PTmines, PTmineG) &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PTmineG.body.\_index = table.indexOf(PTmines, PTmineG) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp; return PTmineG&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; &nbsp; end -- on PTmine button release local function onPTMBtnRelease(event) &nbsp; &nbsp;if PTmineCount \<= 1 then &nbsp;&nbsp;&nbsp; PTmineCount = PTmineCount + 1 &nbsp;&nbsp;&nbsp; print(" PTmineCount:&nbsp;&nbsp;&nbsp; "&nbsp; .. PTmineCount) &nbsp; &nbsp;&nbsp;&nbsp; timer.performWithDelay(10, buildPTmine) &nbsp;&nbsp;&nbsp; elseif PTmineCount == 2 then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; print("Already two mines present. End function.") &nbsp;&nbsp;&nbsp; end end PTMBtn = widget.newButton{&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp; defaultFile = "GUI\_assets/But\_shooting.png", &nbsp;&nbsp;&nbsp; overFile = "GUI\_assets/But\_shooting-over.png", &nbsp;&nbsp;&nbsp; onPress = PTMBtnSetAlpha, &nbsp;&nbsp;&nbsp; onRelease = onPTMBtnRelease&nbsp;&nbsp;&nbsp; -- Event listener function &nbsp;&nbsp;&nbsp; } &nbsp;&nbsp;&nbsp; PTMBtn:setReferencePoint( display.CenterReferencePoint ); &nbsp;&nbsp;&nbsp; PTMBtn.x = 935; PTMBtn.y = 675; &nbsp;&nbsp;&nbsp; PTMBtn:scale(.755, .755); &nbsp;&nbsp;&nbsp; PTMBtn.alpha = .7 &nbsp; &nbsp; PTMBtnbgi = display.newImage("GUI\_assets/Bg\_shooting.png") PTMBtnbgi.x = PTMBtn.x; PTMBtnbgi.y = PTMBtn.y; PTMBtnbgi:scale(.4, .4)&nbsp; &nbsp; local function onPTMBtnTap( event ) &nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp; local T = event.target&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp; if (event.phase == "began") then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; display.getCurrentStage():setFocus( T, event.id ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; T.isFocus = true&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; CreatePTmine() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; elseif event.phase == "ended" then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; display.getCurrentStage():setFocus( T, nil) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; T.isFocus = false &nbsp; &nbsp;&nbsp;&nbsp; end &nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp; return true; end --Adds an event listener to the transRect PTMBtn:addEventListener( "tap", onPTMBtnTap ) &nbsp;

– user bullet –

local function shootBullet()       audio.play( tank\_shot )            local bullet = display.newGroup()       PlayerBulletCount = PlayerBulletCount + 1       print("PlayerBulletCount increased by 1")              emitterCount = emitterCount + 1         local pt = mathapi.rotateAboutPoint( {x=user\_turret.x,y=user\_turret.y-47}, user\_turret, user\_turret.rotation - 90 )                  -- In bullet fire function       local emitterName = "E" .. emitterCount         local Emitter = display.newGroup()       --bullet attributes           bullet.body = loader:createSpriteFromSHDocument("Weapon3ex", "GameFX", "LevelAssets.pshs");       bullet.body.x = pt.x; bullet.body.y = pt.y;       physics.addBody( bullet.body , "dynamic", { friction= 0, bounce= 1.0, density= .6, radius= 7, filter = bulletCollisionFilter} );       bullet.body:scale(.63,.57);                bullet.body.class = "bullet"       bullet.body.isBullet = true                bullet.body.rotation = user\_turret.rotation + 90       bullet.body:applyForce( pt.x - user\_turret.x, pt.y - user\_turret.y, user\_turret.x, user\_turret.y )             -- Bullet Emitter       Particles.CreateEmitter(emitterName, 0, 0, 0, false, true) -- Uses the base name (generated dynamically with each tank)       bullet.body.emitter = Particles.GetEmitter(emitterName)       bullet.body.emitterRef = emitterName                       Particles.CreateParticleType ("PBulletSTrail",             {             imagePath              = "gfx/smoke01.png",             imageWidth             = 10,                 imageHeight            = 12,                 directionVariation     = 45,             velocityVariation      = 50,             rotationVariation      = 360,             rotationChange         = 30,             useEmitterRotation     = false,             alphaStart             = 1,             fadeInSpeed            = 1.5,             fadeOutSpeed           = .5,             fadeOutDelay           = 100,             scaleStart             = .5,             scaleVariation         = 1,             scaleInSpeed           = .5,             emissionShape          = 1,             emissionRadius         = 1,             killOutsideScreen      = true,             lifeTime               = 150,             blendMode              = "subtract",             } )                  Particles.AttachParticleType(emitterName , "PBulletSTrail",  32, 99999,0)                  local R = 153         local G = 153         local B = 153         Particles.SetParticleProperty("PBulletSTrail", "colorStart", {R,G,B})         local function attachBEmitters()                       if BEmitters then                                  print( "Number of Emitters: " .. tostring( #BEmitters ) )                 if #BEmitters~=0 then                              Particles.SetEmitterTarget( emitterName, bullet.body, true, 0, 0, 0 )                     Particles.StartEmitter(emitterName)                 end             end           return Emitter                 end         for i=1,1 do             BEmitters[#BEmitters + 1] = attachBEmitters()         end         timer.performWithDelay(10, attachBEmitters)        local onPlayerBulletCollision = function(self, event)                     local parentObject = PlayerBullets[self.\_index]                                 if (event.phase == "began") then                                  if (event.other.class == "EnemyBullet") then                          print("PlayerBulletCount decreased by 1")                     PlayerBulletCount = PlayerBulletCount - 1                     EnemyBulletCount = EnemyBulletCount - 1                                              Particles.DeleteEmitter(event.target.emitterRef)                                Particles.DeleteEmitter(event.other.emitterRef)                                display.remove(self)                     display.remove(event.other)                     print(" Projectile Removed ")                              end                                       elseif (event.phase == "ended") then                              PlayerBulletCount = PlayerBulletCount - 1                 Particles.DeleteEmitter(event.target.emitterRef)                            display.remove(self)                              end         return true       end       bullet.body.collision = onPlayerBulletCollision       bullet.body:addEventListener("collision", bullet.body)             bullet:insert( bullet.body )       bullet:insert( bullet.body.emitter )       camera:add(bullet, 2, false)             table.insert(PlayerBullets, bullet)             bullet.body.\_index = table.indexOf(PlayerBullets, bullet)       bullet.body.emitter.\_index = bullet.body.\_index            return bullet       end  

Maybe there is an error in my code somewhere that is causing the collisions to conflict.

-Saer

Edit: Hopefully you’ll be able to read the code fine… the way this forum formats code is atrocious.

[Saerothir]

A more in-depth video explaining the situation, for some people on IRC who are helping me out as well as anyone else who may be interested: (problem solved, video removed)

[Saerothir]

I guess I should explain how I solved the problem.
Rather than adding a circular physics-body to the bullet and mine directly in-code, I created a complex-physics body (using SpriteHelper) and that fixed it.
Now whenever a mine comes in contact with a bullet, the mine’s collision function is executed.

I didin’t know collision-detection was so sensitive. I’ll definitely be more careful how I code collisions in the future.

Cheers!

-Saer