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Add cruise missile custom weapon behavior #1796

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May 24, 2023
Merged

Add cruise missile custom weapon behavior #1796

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61 changes: 61 additions & 0 deletions luarules/gadgets/unit_custom_weapons_behaviours.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@ end
if gadgetHandler:IsSyncedCode() then

local projectiles = {}
local active_projectiles = {}
local checkingFunctions = {}
local applyingFunctions = {}
local math_sqrt = math.sqrt
Expand All @@ -26,6 +27,63 @@ if gadgetHandler:IsSyncedCode() then
end
end

checkingFunctions.cruise = {}
checkingFunctions.cruise["distance>0"] = function (proID)
--Spring.Echo()

if Spring.GetProjectileTimeToLive(proID) <= 0 then
return true
end
local targetTypeInt,target = Spring.GetProjectileTarget(proID)
local xx,yy,zz
local xxv,yyv,zzv
if targetTypeInt == string.byte('g') then
xx = target[1]
yy = target[2]
zz = target[3]
end
if targetTypeInt == string.byte('u') then
_,_,_,_,_,_,xx,yy,zz = Spring.GetUnitPosition(target,true,true)
end
local xp,yp,zp = Spring.GetProjectilePosition(proID)
local vxp,vyp,vzp = Spring.GetProjectileVelocity(proID)
local mag = math_sqrt(vxp*vxp+vyp*vyp+vzp*vzp)
local infos = projectiles[proID]
if math_sqrt((xp-xx)^2 + (yp-yy)^2 + (zp-zz)^2) > tonumber(infos.lockon_dist) then
yg = Spring.GetGroundHeight(xp,zp)
nx,ny,nz,slope= Spring.GetGroundNormal(xp,zp)
--Spring.Echo(Spring.GetGroundNormal(xp,zp))
--Spring.Echo(tonumber(infos.cruise_height)*slope)
if yp < yg + tonumber(infos.cruise_min_height) then
active_projectiles[proID] = true
Spring.SetProjectilePosition(proID,xp,yg + tonumber(infos.cruise_min_height),zp)
local norm = (vxp*nx+vyp*ny+vzp*nz)
xxv = vxp - norm*nx*0
yyv = vyp - norm*ny
zzv = vzp - norm*nz*0
Spring.SetProjectileVelocity(proID,xxv,yyv,zzv)
end
if yp > yg + tonumber(infos.cruise_max_height) and active_projectiles[proID] and vyp > -mag*.25 then
-- do not clamp to max height if
-- vertical velocity downward is more than 1/4 of current speed
-- probably just went off lip of steep cliff
Spring.SetProjectilePosition(proID,xp,yg + tonumber(infos.cruise_max_height),zp)
local norm = (vxp*nx+vyp*ny+vzp*nz)
xxv = vxp - norm*nx*0
yyv = vyp - norm*ny
zzv = vzp - norm*nz*0
Spring.SetProjectileVelocity(proID,xxv,yyv,zzv)
end
return false
else
return true
end
end

applyingFunctions.cruise = function (proID)
return false
end

checkingFunctions.cannonwaterpen = {}
checkingFunctions.cannonwaterpen["ypos<0"] = function (proID)
local _,y,_ = Spring.GetProjectilePosition(proID)
Expand Down Expand Up @@ -107,18 +165,21 @@ if gadgetHandler:IsSyncedCode() then
local wDefID = Spring.GetProjectileDefID(proID)
if specialWeaponCustomDefs[wDefID] then
projectiles[proID] = specialWeaponCustomDefs[wDefID]
active_projectiles[proID] = nil
end
end

function gadget:ProjectileDestroyed(proID)
projectiles[proID] = nil
active_projectiles[proID] = nil
end

function gadget:GameFrame(f)
for proID, infos in pairs(projectiles) do
if checkingFunctions[infos.speceffect][infos.when](proID) == true then
applyingFunctions[infos.speceffect](proID)
projectiles[proID] = nil
active_projectiles[proID] = nil
end
end
end
Expand Down