fryja

-- point1, point2 and point3 take a tile coordinate formatted in row, col. eg. {10,10}
function drawTriangle(point1, point2, point3, terrainToDraw)
  
    local function sign(p1, p2, p3)
        return (p1[2] - p3[2]) * (p2[1] - p3[1]) - (p2[2] - p3[2]) * (p1[1] - p3[1])
    end


    local function pointInTriangle(point, v1, v2, v3)
    

fryja

-- point1, point2 and point3 take a tile coordinate formatted in row, col. eg. {10,10}
function getSquaresInTriangle(point1, point2, point3)
    
    tiles = {}
    
    local function sign(p1, p2, p3)
        return (p1[2] - p3[2]) * (p2[1] - p3[1]) - (p2[2] - p3[2]) * (p1[1] - p3[1])
    end

fryja

-- draws a box of terrain from a start coordinate to an end coordinate
-- startRow, startCol (int) are the start row and col coordinates of the rectangle
-- endRow, endCol (int) are the start row and col coordinates of the rectangle
-- pickedTerrain is the terrain type you wish the rectangle to be filled with

function drawRect(startRow, startCol, endRow, endCol, pickedTerrain)
    local function sign(number)
        return number > 0 and 1 or (number == 0 and 0 or -1)
    end