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-- Author:KR-Softwares/kevink98
-- Name:FieldDimensions with bitmap
-- Description:You can draw the filed on a bitmap (*.grle). The script create automaticly fielddimensions.
-- Icon:
-- Hide: no

-- Set filename to a bitmap file (*.grle)
local filename = "FS22_MarbleRck/maps/mapUS/data/infoLayer_fieldDimensions.png"
--Set bits of bitmap (normaly 8 bits)
local bits = 8
--Set size of map (normaly 1024)
local size = 8192
--Set factor for bigger grle's
local factor = 6
--Set field factor (glreSize/mapSize) (f.e. standardmap: 4096 / 2048 = 2
local fieldFactor = 4

--HELPS

--szie:
--1x Map : 1024
--4x Map : 2048

-- factor:
-- use 1x Map and grle size 1024x1024 : 1
-- use 1x Map and grle size 2048x2048 : 2
-- use 4x Map and grle size 2048x2048 : 1
-- use 4x Map and grle size 4096x4096 : 2


-- NO CHANGES HERE --
local map = createBitVectorMap("FieldDefs")
local success = loadBitVectorMapFromFile(map, filename, bits)
if not success then
    print("Can't load file!")
    return
end
local localMapWidth, localMapHeight = getBitVectorMapSize(map)

local foundFields = {}
local sceneRoot = getChildAt(getRootNode(), 0)
local terrainNode = getChild(sceneRoot, "terrain")
for y = localMapHeight-1, 0, -1 do
    local lastValue = -1
    for x = 0, localMapWidth - 1 do
        local value = getBitVectorMapPoint(map, x, y, 0, bits)
        if value > 0 then
            if foundFields[value] == nil then
                foundFields[value] = {}
                foundFields[value].lines = {}
            end
            
            if foundFields[value].lines[y] == nil then
                foundFields[value].lines[y] = {}
            end
                            
            if lastValue == -1 then
                local newLine = {}
                newLine.y = y / factor
                newLine.start_x = x / factor
                newLine.end_x = -1
                table.insert(foundFields[value].lines[y], newLine)
                lastValue = value
            end
        elseif lastValue > -1 then
            local lastlineIndex = nil
            for k,line in pairs(foundFields[lastValue].lines[y]) do
                if line.end_x == -1 then
                    lastlineIndex = k
                    break
                end
            end
            
            if lastlineIndex ~= nil then    
                foundFields[lastValue].lines[y][lastlineIndex].end_x = (x / factor) - 1 
                lastValue = -1
            end       
        end
    end
end 

local node = getSelection(0)
if node == 0 or getUserAttribute(node, "onCreate") ~= "FieldUtil.onCreate" then
    print("Error: Please select FieldDefinition defintions root!")
    return
end

local function FormatNumber(idx)
    if idx < 10 then
        return string.format("00%s", idx)
    elseif idx < 100 then
        return string.format("0%s", idx)
    else
        return idx
    end
end

for i=0, getNumOfChildren(node)-1, 1 do
    local childField = getChildAt(node, 0)
    unlink(childField)
end

local function GetStartPosFromLine(line)
    local s_x = line.start_x*2 - size
    local s_z = line.y*2 - size
    local w = (line.end_x - line.start_x) * 2 + 2
    
    return s_x, s_z, w
end

local function GenerateFieldDimensions(x,y,z,w,h, cornerIdx)
    local c1 = createTransformGroup(string.format("corner%s_1", FormatNumber(cornerIdx)))
    local c2 = createTransformGroup(string.format("corner%s_2", FormatNumber(cornerIdx)))
    local c3 = createTransformGroup(string.format("corner%s_3", FormatNumber(cornerIdx)))
    link(c1, c2)
    link(c1, c3)

    setTranslation(c1, x, y,z)
    setTranslation(c2, 0,0,h)
    setTranslation(c3, w, 0,h)
    return c1
end

for v, data in pairs(foundFields) do
    local fieldTg = createTransformGroup(string.format("field%s", FormatNumber(v)))
    local fieldDimensions = createTransformGroup("fieldDimensions")
    local fieldMapIndicator = createTransformGroup("fieldMapIndicator")
    link(fieldTg, fieldDimensions)
    link(fieldTg, fieldMapIndicator)
    local cornerIdx = 1
    
    local s = size + 1
    local min_x = s
    local max_x = -s
    local min_y = s
    local max_y = -s

    local skippedLines = {}

    for y = 0, localMapHeight-1 do
        if data.lines[y] ~= nil then

            for yi = 1, (#data.lines[y]),1 do
            --for _,line in pairs(data.lines[y]) do

                local s_x, s_z, w = GetStartPosFromLine(data.lines[y][yi])

                if s_x < min_x then
                    min_x = s_x
                end
                if s_x + w > max_x then
                    max_x = s_x + w
                end
                if s_z < min_y then
                    min_y = s_z
                end
                if s_z > max_y then
                    max_y = s_z
                end

                if skippedLines[yi] == nil then
                    skippedLines[yi] = {}
                    skippedLines[yi].s_x = s_x
                    skippedLines[yi].s_z = s_z
                    skippedLines[yi].w = w
                    skippedLines[yi].height = 1 / fieldFactor        
                elseif skippedLines[yi].s_x == s_x and skippedLines[yi].w == w then                    
                    skippedLines[yi].height = skippedLines[yi].height + 1 / fieldFactor   
                else        
                    local y = getTerrainHeightAtWorldPos(terrainNode, skippedLines[yi].s_x, 0, skippedLines[yi].s_z)  
                    local c1 = GenerateFieldDimensions(skippedLines[yi].s_x, y, skippedLines[yi].s_z, skippedLines[yi].w, skippedLines[yi].height, cornerIdx)
                    link(fieldDimensions, c1)
                    cornerIdx = cornerIdx + 1

                    skippedLines[yi] = {}
                    skippedLines[yi].s_x = s_x
                    skippedLines[yi].s_z = s_z
                    skippedLines[yi].w = w
                    skippedLines[yi].height = 1 / fieldFactor  
                end
                
            end
        end
    end

    for yi,_ in pairs(skippedLines) do   
        local y = getTerrainHeightAtWorldPos(terrainNode, skippedLines[yi].s_x, 0, skippedLines[yi].s_z)  
        local c1 = GenerateFieldDimensions(skippedLines[yi].s_x, y, skippedLines[yi].s_z, skippedLines[yi].w, skippedLines[yi].height, cornerIdx)
        link(fieldDimensions, c1)
    end

    local ind_x = min_x + (max_x - min_x) / 2
    local ind_y = min_y + (max_y - min_y) / 2
    setTranslation(fieldMapIndicator, ind_x, getTerrainHeightAtWorldPos(terrainNode, ind_x, 0, ind_y), ind_y)
    
    setUserAttribute(fieldTg, "fieldAngle", "Integer", 90)
    setUserAttribute(fieldTg, "fieldDimensionIndex", "Integer", 0)
    setUserAttribute(fieldTg, "nameIndicatorIndex", "Integer", 1)
    link(node, fieldTg)
end