Check for Player Position

[mackerel]

Hi,

I have all the code I need but I only need to implement a simple if statement, however I have no idea how to do that.

I want to know how to check-- how the player is positioned to the target, i.e.

if [Player Pos Right From Target]

else if [Player Pos Left From Target]

etc

 

[Diamond Haze]

local target = getCreatureTarget(cid)
local targetpos = getCreaturePosition(target)

if getPlayerPosition(cid, {x=targetpos.x + 1, y=targetpos.y + 1, z=targetpos.z}) then ...

Not sure which TFS are you using, it should work for 0.3, 0.4.

 

[mackerel]

local target = getCreatureTarget(cid)
local targetpos = getCreaturePosition(target)

if getPlayerPosition(cid, {x=targetpos.x + 1, y=targetpos.y + 1, z=targetpos.z}) then ...

Not sure which TFS are you using, it should work for 0.3, 0.4.

TFS 1.0

I am not sure why but this is the error, I don't know why it is a boolean value

Lua Script Error: [Test Interface]
data/spells/scripts/test/test1.lua
data/spells/scripts/test/test1.lua:5: attempt to index local 'targetpos' (a boolean value)
stack traceback:
[C]: in function '__index'
data/spells/scripts/test/test1.lua:5: in main chunk
[Warning - Event::checkScript] Can not load script: scripts/test/test1.lua
data/spells/scripts/test/test1.lua:8: '<eof>' expected near 'end'

Code:

-- Check for Player Pos

local target = getCreatureTarget(cid)
local targetpos = getCreaturePosition(target)
if getPlayerPosition(cid, {x=targetpos.x + 1, y=targetpos.y + 1, z=targetpos.z}) then
    print("ddd")
end

 

[Infernum]

lib/core/position.lua

offsets = {
    [DIRECTION_NORTH] = {x = 0, y = -1},
    [DIRECTION_EAST] = {x = 1, y = 0},
    [DIRECTION_SOUTH] = {x = 0, y = 1},
    [DIRECTION_WEST] = {x = -1, y = 0},
    [DIRECTION_SOUTHWEST] = {x = -1, y = 1},
    [DIRECTION_SOUTHEAST] = {x = 1, y = 1},
    [DIRECTION_NORTHWEST] = {x = -1, y = -1},
    [DIRECTION_NORTHEAST] = {x = 1, y = -1}
}

function Position:setDirectionOffset(dir)
    local tmp = offsets[dir]
    if not tmp then
        return self
    end
    return Position(self.x + tmp.x, self.y + tmp.y, self.z)
end

local target = player:getTarget()
if not target then
    return false
end

local targetPosition = target:getPosition()
local playerPosition = player:getPosition()
for i = 0, 3 do
    if targetPosition:setDirectionOffset(i) == playerPosition then
        print("k")
        break
    end
end

 

[mackerel]

lib/core/position.lua

offsets = {
    [DIRECTION_NORTH] = {x = 0, y = -1},
    [DIRECTION_EAST] = {x = 1, y = 0},
    [DIRECTION_SOUTH] = {x = 0, y = 1},
    [DIRECTION_WEST] = {x = -1, y = 0},
    [DIRECTION_SOUTHWEST] = {x = -1, y = 1},
    [DIRECTION_SOUTHEAST] = {x = 1, y = 1},
    [DIRECTION_NORTHWEST] = {x = -1, y = -1},
    [DIRECTION_NORTHEAST] = {x = 1, y = -1}
}

function Position:setDirectionOffset(dir)
    local tmp = offsets[dir]
    if not tmp then
        return self
    end
    return Position(self.x + tmp.x, self.y + tmp.y, self.z)
end

local target = player:getTarget()
if not target then
    return false
end

local targetPosition = target:getPosition()
local playerPosition = player:getPosition()
for i = 0, 3 do
    if targetPosition:setDirectionOffset(i) == playerPosition then
        print("k")
        break
    end
end

It's TFS 1.0, I don't have this file (/core/position.lua), but the same thing here, even though it's 'player' in error, I've been trying to change it to creature but it didn't work

Lua Script Error: [Test Interface]
data/spells/scripts/test/test1.lua
data/spells/scripts/test/test1.lua:2: attempt to index global 'player' (a nil value)
stack traceback:
[C]: in function '__index'
data/spells/scripts/test/test1.lua:2: in main chunk
[Warning - Event::checkScript] Can not load script: scripts/test/test1.lua

code:

-- Check for Player Pos
local target = player:getTarget()
if not target then
    return false
end
local targetPosition = target:getPosition()
local playerPosition = player:getPosition()
for i = 0, 3 do
    if targetPosition:setDirectionOffset(i) == playerPosition then
        print("k")
        break
    end
end

 

[Infernum]

where are you using the script?
the code is meant to be used inside of a function
in tfs 1.0 you have to construct a player object in order to use player methods
after the function you're using (it most likely has cid in the arguments) put local player = Player(cid)
put the direction offset code inside of global.lua instead then, but change function Position:setDirectionOffset(dir) to function Position.setDirectionOffset(self, dir)

 

[mackerel]

where are you using the script?
the code is meant to be used inside of a function
in tfs 1.0 you have to construct a player object in order to use player methods
after the function you're using (it most likely has cid in the arguments) put local player = Player(cid)
put the direction offset code inside of global.lua instead then, but change function Position:setDirectionOffset(dir) to function Position.setDirectionOffset(self, dir)

this one is executed on 'function onCastSpell(cid, var)'

///EDIT

The first one started to work but it prints 'ddd' no matter the direction

    -- Check for Player Pos
    local target = getCreatureTarget(cid)
    local targetpos = getCreaturePosition(target)
    if getPlayerPosition(cid, {x=targetpos.x + 1, y=targetpos.y + 1, z=targetpos.z}) then
        print("ddd")
    else
        print("no")
    end

--------
The second one, on the other hand another error with offset, could be not specified ?

attempt to call method 'setDirectionOffset' (a nil value)

    -- Check for Player Pos
    local target = getCreatureTarget(cid)
    if not target then
        return false
    end
    local targetPosition = getCreaturePosition(target)
    local playerPosition = getPlayerPosition(cid)
    for i = 0, 3 do
        if targetPosition:setDirectionOffset(i) == playerPosition then
            print("k")
            break
        end
    end

//EDIT2

After adding to the global.lua

Lua Script Error: [Main Interface]
data/global.lua
data/global.lua:790: table index is nil
stack traceback:
[C]: in function '__newindex'
data/global.lua:790: in main chunk
[Warning - ScriptingManager::loadScriptSystems] Can not load data/global.lua

 

[mackerel]

//Fixed errors;

- remove square brackets from global variables, i.e. [DIRECTION_NORTH] -> DIRECTION_NORTH

@Xeraphus

This code below, prints "k" when I am on the same position as target, not sure if this is how it meant to be. How do you check if you're standing north from target?

    for i = 0, 3 do
        if targetPosition:setDirectionOffset(i) == playerPosition then
            print("k")
            break
        end
    end

This one doesn't work |: (also removes important part of the loop, (i))

    for i = 0, 3 do
        if targetPosition:setDirectionOffset(DIRECTION_NORTH) == playerPosition then
            print("k")
            break
        end
    end

Global Lua:

offsets = {
    DIRECTION_NORTH = {x = 0, y = -1},
    DIRECTION_EAST = {x = 1, y = 0},
    DIRECTION_SOUTH = {x = 0, y = 1},
    DIRECTION_WEST = {x = -1, y = 0},
    DIRECTION_SOUTHWEST = {x = -1, y = 1},
    DIRECTION_SOUTHEAST = {x = 1, y = 1},
    DIRECTION_NORTHWEST = {x = -1, y = -1},
    DIRECTION_NORTHEAST = {x = 1, y = -1}
}
function Position:setDirectionOffset(dir)
    local tmp = offsets[dir]
    if not tmp then
        return self
    end
    return Position(self.x + tmp.x, self.y + tmp.y, self.z)
end

 

[Infernum]

//Fixed errors;

- remove square brackets from global variables, i.e. [DIRECTION_NORTH] -> DIRECTION_NORTH

@Xeraphus

This code below, prints "k" when I am on the same position as target, not sure if this is how it meant to be. How do you check if you're standing north from target?

    for i = 0, 3 do
        if targetPosition:setDirectionOffset(i) == playerPosition then
            print("k")
            break
        end
    end

This one doesn't work |: (also removes important part of the loop, (i))

    for i = 0, 3 do
        if targetPosition:setDirectionOffset(DIRECTION_NORTH) == playerPosition then
            print("k")
            break
        end
    end

Global Lua:

offsets = {
    DIRECTION_NORTH = {x = 0, y = -1},
    DIRECTION_EAST = {x = 1, y = 0},
    DIRECTION_SOUTH = {x = 0, y = 1},
    DIRECTION_WEST = {x = -1, y = 0},
    DIRECTION_SOUTHWEST = {x = -1, y = 1},
    DIRECTION_SOUTHEAST = {x = 1, y = 1},
    DIRECTION_NORTHWEST = {x = -1, y = -1},
    DIRECTION_NORTHEAST = {x = 1, y = -1}
}
function Position:setDirectionOffset(dir)
    local tmp = offsets[dir]
    if not tmp then
        return self
    end
    return Position(self.x + tmp.x, self.y + tmp.y, self.z)
end

because you removed the square brackets when you weren't supposed to.
now the table contains string indexes, might as well have ["DIRECTION_NORTH"] instead of [0] (DIRECTION_NORTH is an enum which represents 0)