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| Mine Launcher http://45.55.195.193/viewtopic.php?f=75&t=45753 |
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| Author: | doomedbeksinski [ Mon Jun 30, 2014 7:32 pm ] |
| Post subject: | Mine Launcher |
I've been messing around with weapons lately. Mostly because I'm taking a Java object oriented design class and I can actually understand code now. I've made a bunch of weapons that are just downright awesome. One of the items on my to-do list though is to make a weapon that shoots mines. I have no idea where to start but I'm not advanced enough to make everything from scratch, and the code surrounding both the cluster mine bomb and grenade launcher is a bit too convoluted for my level of skill (which I will admit at this moment is the very bottom, but at least I'm on some level..). Another problem I have with mines in general is that they don't seem to work very well. Either they don't ever go off or they go off only on your actors even though they set them. I really need to fix this because It bugs the ♥♥♥♥ out of me. At least show me how I can make mines go off no matter who steps on them. Because it seems the IFF on them is FUBAR. And I love the hell out of minefields, that work... |
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| Author: | CaveCricket48 [ Mon Jun 30, 2014 10:53 pm ] |
| Post subject: | Re: Mine Launcher |
For a basic mine, the script usually looks something like this: Code: function Create(self) self.scanTimer = Timer(); end function Update(self) if self.scanTimer:IsPastSimMS( 500 ); -- half second delay in between detection self.scanTimer:Reset(); -- some method of detecting actors or appropriate targets if <appropriate target is detected> then -- gib self, or create explosion effects and then delete self end end end There are two main ways to do detection. You have the basic distance check, which goes through every actor on the map and does a distance check with them. If an actor is within a specified distance, the mine explodes. Then there are ray casts, which check pixels forming a line in some direction, which are more efficient than distance checks but have a narrower "vision." Multiple ray casts can form a decent area check, or you can make your own pattern with the pixel checks ( SceneMan:GetMOIDPixel( x, y) ). Fermat's spiral works nicely. Team checks should also be done during this part, so the mine ignores allied actors. The timer and timer check is for putting a time delay in between detection runs. Depending on how costly your detection system is, you want to only run it every so milliseconds instead of every frame, unless if it's fast and simple (a single line ray cast). Detonating the mine can be simply forcing it to gib using Lua ( self:GibThis() ) or spawning a separate explosion effect and then deleting the mine. An example of a simple mine script that can be attached to an MO that is fired from a gun: Code: function Create(self) self.scanTimer = Timer(); end function Update(self) if self.scanTimer:IsPastSimMS( 500 ); -- half second delay in between detections self.scanTimer:Reset(); -- go through all actors for actor in MovableMan.Actors do -- if the actor's team is not the mine's team, and if the distance between the mine and the actor is less than 100 pixels... if actor.Team ~= self.Team and SceneMan:ShortestDistance( self.Pos, actor.Pos, SceneMan.SceneWrapsX).Magnitude < 100; -- make the mine gib itself self:GibThis(); end end end end Since a projectile's Team value is inherited from the gun, you can have a plain unscripted HDFirearm for the mine launcher. |
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| Author: | Arcalane [ Tue Jul 01, 2014 10:09 am ] |
| Post subject: | Re: Mine Launcher |
The Fermat's Spiral technique works surprisingly well, I have to admit. I was skeptical at first (in terms of performance-demanding it would be), but it worked like a charm for the flak shells and airburst grenades which can both be hammered out at a decent rate, so it should work fine for mines as well as long as you're not throwing billions of them all over the map. Unfortunately I think the only example(s) of the script I have on hand might be triggered by terrain? |
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| Author: | CaveCricket48 [ Tue Jul 01, 2014 10:35 am ] |
| Post subject: | Re: Mine Launcher |
Here's one for MOs only: Code: function Create(self) self.delayTimer = Timer(); self.delayTime = 100; -- Delay time in MS before prox sensor starts self.pointCount = 100; -- number of points in the spiral self.spiralScale = 5; -- spiral scale self.skipPoints = 10; -- skips the first X points end function Update(self) if self.delayTimer:IsPastSimMS(self.delayTime) then for i = self.skipPoints, self.pointCount - 1 do local radius = self.spiralScale*math.sqrt(i); local angle = i * 137.508; local checkPos = self.Pos + Vector(radius,0):DegRotate(angle); if SceneMan.SceneWrapsX == true then if checkPos.X > SceneMan.SceneWidth then checkPos = Vector(checkPos.X - SceneMan.SceneWidth,checkPos.Y); elseif checkPos.X < 0 then checkPos = Vector(SceneMan.SceneWidth + checkPos.X,checkPos.Y); end end local moCheck = SceneMan:GetMOIDPixel(checkPos.X,checkPos.Y); if moCheck ~= 255 then local actor = MovableMan:GetMOFromID( MovableMan:GetMOFromID(moCheck).RootID ); if actor.Team ~= self.Team then self:GibThis(); break; end end end end end The timer in this one is just to prevent it from blowing up too early. |
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| Author: | Bad Boy [ Tue Jul 01, 2014 8:26 pm ] |
| Post subject: | Re: Mine Launcher |
A bit of a side note but does anyone know how efficient it would be to make a scenearea and check if actors are within that, versus raycasting or proximity checks? |
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| Author: | CaveCricket48 [ Fri Jul 04, 2014 12:48 am ] |
| Post subject: | Re: Mine Launcher |
It would probably be more efficient than a distance check, but I'm not 100% sure about scene area vs GetMoidPixel, but I'd lean more towards GetMOIDPixel if you don't have a gigantic search area. |
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| Author: | doomedbeksinski [ Fri Jul 04, 2014 1:24 am ] |
| Post subject: | Re: Mine Launcher |
I kinda need a little prodding more in the .ini department. ironically LUA is much easier to understand with a bit of java training. |
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| Author: | CaveCricket48 [ Sat Jul 05, 2014 6:55 am ] |
| Post subject: | Re: Mine Launcher |
This should help. Code: // This is the actual mine AddAmmo = MOSRotating PresetName = Mine Launcher Mine Mass = 2 RestThreshold = -1 HitsMOs = 1 GetsHitByMOs = 0 ScriptPath = MyMod.rte/MyMineScript.lua SpriteFile = ContentFile FilePath = Coalition.rte/Devices/Sprites/BulletGrenadeA.bmp FrameCount = 1 SpriteOffset = Vector X = -3 Y = -2 AtomGroup = AtomGroup AutoGenerate = 1 Material = Material CopyOf = Bullet Metal Resolution = 2 Depth = 0 DeepGroup = AtomGroup AutoGenerate = 1 Material = Material CopyOf = Bullet Metal Resolution = 4 Depth = 1 DeepCheck = 0 // Gib effects AddGib = Gib GibParticle = MOSParticle CopyOf = Side Thruster Blast Ball 1 Count = 10 MinVelocity = 30 MaxVelocity = 55 AddGib = Gib GibParticle = MOPixel CopyOf = Grenade Fragment Gray Count = 25 MinVelocity = 50 MaxVelocity = 150 AddGib = Gib GibParticle = MOPixel CopyOf = Grenade Fragment Yellow Count = 25 MinVelocity = 50 MaxVelocity = 150 AddGib = Gib GibParticle = MOPixel CopyOf = Air Blast Count = 20 MinVelocity = 50 MaxVelocity = 150 AddGib = Gib GibParticle = MOSParticle CopyOf = Explosion Smoke 2 Count = 15 Spread = 3.1 MaxVelocity = 10 MinVelocity = 0 LifeVariation = 0.70 InheritsVel = 1 AddGib = Gib GibParticle = MOSParticle CopyOf = Explosion Smoke 2 Glow Count = 6 Spread = 3.1 MaxVelocity = 10 MinVelocity = 0 LifeVariation = 0.60 InheritsVel = 1 AddGib = Gib GibParticle = AEmitter CopyOf = Explosion Trail 1 Count = 3 Spread = 3.1 MaxVelocity = 40 MinVelocity = 20 LifeVariation = 0.50 InheritsVel = 1 EffectOnGib = 1 EffectAlwaysShows = 1 ScreenEffect = ContentFile Path = Base.rte/Effects/Glows/YellowHuge.bmp GibSound = Sound Priority = 1000 AddSample = ContentFile Path = Base.rte/Sounds/Explode1.wav AddSample = ContentFile Path = Base.rte/Sounds/Explode2.wav // Round for the Mine Launcher AddAmmo = Round PresetName = Round Mine Launcher ParticleCount = 1 Particle = MOSRotating CopyOf = Mine Launcher Mine FireVelocity = 30 Separation = 0 // Magazine AddAmmo = Magazine PresetName = Magazine Mine Launcher ... RegularRound = Round CopyOf = Round Mine Launcher // Gun AddDevice = HDFirearm PresetName = Mine Launcher ... Magazine = Magazine CopyOf = Magazine Mine Launcher ... |
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