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phong1892
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 Posted: 19 Feb, 2012
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Joined: 31 Mar, 2011
Posts: 128
Location: Hanoi, Vietnam
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Hi, I want to created a new function like another OnCreate, OnDamage,... function called OnMissTarget(a function not a thread). A missile for example, when it pass an aircraft but doesn't collide with aircraft because of its high index in MaxSpeed and low index in TurnRate. I want OnMissTarget do some stuffs in this event. I've created a Projectile Class in /mymod/lua/mymod_projectiles.lua: Code: local SingleBeamProjectile = import('/lua/sim/defaultprojectiles.lua').SingleBeamProjectile
ATAMissile = Class(SingleBeamProjectile) {
--# Note: Missile speed is 30dis/sec
--# Calculate distance from projectile to its target
GetDistanceToTarget = function(self)
local mpos = self:GetPosition()
local tpos = self:GetCurrentTargetPosition()
local dist = VDist3(mpos, tpos)
return math.floor(dist)
end
OnMissTarget = function(self)
--# Initiate ApproachTimes = 0
--# Calculate DistanceOnCreate = distance from proj to target when projectile is created
--# While not self:BeenDestroyed() and DistanceOnCreate > 0 and ApproachTimes ==0 do
--# Update DistanceToTarget every 0.1 second
--# While DistanceToTarget < 3 do ApproachTimes = 1 and break this while...do loop
--# WaitSeconds(0.3)
--# While ApproachTimes == 1 and DistanceToTarget > 3 do
--# Do some stuffs here and then break the while...do loop
--# break while...do loop
end,
} Is script and algorithm true?
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phong1892
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Posted: 19 Feb, 2012
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Joined: 31 Mar, 2011
Posts: 128
Location: Hanoi, Vietnam
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Here is my script with some change in algorithm: Code: local SingleBeamProjectile = import('/lua/sim/defaultprojectiles.lua').SingleBeamProjectile
ATAMissile = Class(SingleBeamProjectile) {
--# Note: Missile speed is 30dis/sec and TurnRate is 120deg/sec
GetDistanceToTarget = function(self)
local mpos = self:GetPosition()
local tpos = self:GetCurrentTargetPosition()
local dist = VDist3(mpos, tpos)
return math.floor(DistanceOnCreate)
end
OnMissTarget = function(self)
local ApproachTimes = 0
local DistanceOnCreate = self:GetDistanceToTarget()
while not self:BeenDestroyed() and DistanceOnCreate > 0 and ApproachTimes ==0 do
mpos = self:GetPosition()
tpos = self:GetCurrentTargetPosition()
WaitSeconds(0.1)
DistanceToTarget = math.floor(VDist3(mpos, tpos))
if DistanceToTarget < 3 then
ApproachTimes = 1
WaitSeconds(0.3)
if DistanceToTarget > 3 then
self:SetTurnRate(10)
WaitSeconds(0.3)
self:Destroy()
end
end
end
end,
} Haven't tested yet, could anyone give me an advice.Thank you
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BulletMagnet
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Posted: 19 Feb, 2012
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Joined: 05 Oct, 2007
Posts: 16424
Location: camping near the biggest power-up
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Since it's a function (and not a thread) you can't use WaitSeconds.
Also, trying to understand your algorithm... why do you want to destroy the projectile?
_________________
Nephylim wrote: But, an FA army in an FA environment just looks... right. Does anyone know how to use air transports? I cant get them to pick up troops.
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phong1892
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Posted: 20 Feb, 2012
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Joined: 31 Mar, 2011
Posts: 128
Location: Hanoi, Vietnam
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BulletMagnet wrote: Since it's a function (and not a thread) you can't use WaitSeconds.
Also, trying to understand your algorithm... why do you want to destroy the projectile? Ah hell, WaitSeconds can't be used in function. It's essential that I'd forgot. I've just wanted to do something like SetTurnRate or SetMaxSpeed,.etc... Destroy it is the easiest way to recognize that it missed its own target.
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Domino
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Posted: 20 Feb, 2012
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Joined: 26 Feb, 2009
Posts: 2996
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Hi,
i dont think this is viable, there is just to many variables involved to accuratly predict if the unit missed its target..
you could do a distance check upto a point and then start checking if the distance gets greater, but this is not really a good solution.
_________________
Domino.
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phong1892
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Posted: 20 Feb, 2012
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Joined: 31 Mar, 2011
Posts: 128
Location: Hanoi, Vietnam
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After few minutes re-checking my script, I have successfully done my work. Here is my script: Code: OnCreate = function(self)
SingleBeamProjectile.OnCreate(self)
self:SetCollisionShape('Sphere', 0, 0, 0, 1)
self:ForkThread(self.OnMissTarget)
end,
GetDistanceToTarget = function(self)
local mpos, tpos, dist = 0
mpos = self:GetPosition()
tpos = self:GetCurrentTargetPosition()
dist = math.floor(VDist3(mpos, tpos))
return dist
end,
OnMissTarget = function(self)
local dist, ApproachTimes = 0
while not self:BeenDestroyed() and ApproachTimes ==0 do
dist = self:GetDistanceToTarget()
WaitSeconds(0.2)
if dist < 4 then
ApproachTimes = 1
LOG('Approached Target At Distance ', dist)
WaitSeconds(0.3) --# Need to make sure that projectile can gain distance far enough.
dist = self:GetDistanceToTarget()
if dist > 4 then
self:SetTurnRate(5)
WaitSeconds(0.2)
self:Destroy()
end
end
end
end, Any ideas?
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