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Let's say if enemies run into the "front"(red area) of the player, then they will get killed. Otherwise nothing happens.
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CS2D
Scripts Define the back or the front of player
Define the back or the front of player
10 replies
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Let's say if enemies run into the "front"(red area) of the player, then they will get killed. Otherwise nothing happens.
Re: Define the back or the front of playerAdmin/mod comment
§5.3 - No memes, ASCII art or comparable fun pictures You want to kill all players in your view line?
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function findPlyAngle(ply1,ply2)
local x1,y1=player(ply1,"x"),player(ply1,"y")
local x2,y2=player(ply2,"x"),player(ply2,"y")
local ang=-math.deg(math.atan2(x1-x2,y1-y2))
return ang
end
function isInFront(ply1,ply2,f) --ply1 is the player in front of ply2
local ang=findPlyAngle(ply1,ply2)
local rot2=player(ply2,"rot")
if rot2>180 then
rot2=player(ply2,"rot")-180
end
if ang>=rot2-f and ang<=rot2+f then
return true
end
return false
end
addhook("ms100","checkforinfront")
function checkforinfront()
for _,id in pairs(player(0,"table")) do
for _,iid in pairs(player(0,"table")) do
if id~=iid then
if isInFront(iid,id,45) then
parse("customkill "..id.." Magic "..iid)
end
end
end
end
end
I guess the thing that actually kills people could be done better, but whatever. I think this is what you asked for. Also the function might not work always.
edited 1×, last 07.04.12 12:09:38 pm
This code could work
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function normalizerad(r) if r>math.pi then r = -math.pi+r%math.pi elseif r<-math.pi then r = math.pi-(math.pi-r%math.pi) end return r end function torad(degrees) return normalizerad(math.rad(degrees+90)) end local fovw = 120 local fovd = 60 fovconst = math.atan2(fovw/2,fovd) --fovconst is pi/2 (or 90 degrees) function isinplayerfov(id,x,y) local a = math.atan2(player(id,"y")-y,player(id,"x")-x) local rot = torad(player(id,"rot")) return (a>(rot-fovconst) and a<(rot+fovconst)) end
Btw, the human FOV isn't exactly 90°, it's actually about 95° according to wikipedia.
To set the exact value set fovconst to 95*math.pi/180
Where 95 is any angle you wish.
Edit: Whoops, 5 minutes too late
Flacko's code is much better - use it instead. @Those who didn't understand what i was asking for
Hmm well, I see what you did, it's much easier to see how it works from your script.
Since lua is a learning language it's always best to know what it's doing...however if you're just leeching it doesn't matter.
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function normalizerad(r) if r>math.pi then r = -math.pi+r%math.pi elseif r<-math.pi then r = math.pi-(math.pi-r%math.pi) end return r end function torad(degrees) return normalizerad(math.rad(degrees+90)) end local fovw = 120 local fovd = 60 fovconst = math.atan2(fovw/2,fovd) function isinplayerfov(id,x,y) local a = math.atan2(player(id,"y")-y,player(id,"x")-x) local rot = torad(player(id,"rot")) local dif = normalizerad(rot-a) return math.abs(dif)<fovconst end
To understand how it works it's better to use an image:
fovconst is half of the FOV angle
in the script:
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fovconst = math.atan2(fovw/2,fovd)
a is the angle from the player to the object
in the script:
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local a = math.atan2(player(id,"y")-y,player(id,"x")-x)
The player rot is the player's rotation converted to radians (CS2D uses a bizarre angle system)
in the script:
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local rot = torad(player(id,"rot"))
To determine if the target is inside the player's FOV, then the difference between rot and a must be smaller than fovconst
in the script:
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local dif = normalizerad(rot-a) return math.abs(dif)<fovconst
normalizerad is just a helper function that makes sure that the angle you pass ranges between [-pi;pi] if it doesn't, then it's transformed. Otherwise, radian operations might become buggy.
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