codepaladin

-- get start position based off of startX and startY grid (cartesian) coordinates
function drawStart()
  local x = (display.contentWidth * 0.5 + ((startX - startY) * tileHeight)) 
  local y = (((startX + startY)/2) * tileHeight) - (tileHeight/2)
  local myText = display.newText( "A", x, y, native.systemFont, 34 )
end

-- get end position based off of endX and endY grid (cartesian) coordinates
function drawEnd()
  local x = (display.contentWidth * 0.5 + ((endX - endY) * tileHeight)) 

codepaladin

-- draw a tile map to the screen
-- populate the tile map
function drawGrid()
   for row = 0, 5 do
      local gridRow = {}
      
      for col = 0, 5 do
        -- draw a diamond shaped tile
        local vertices = { 0,-16, -64,16, 0,48, 64,16 }
        local tile = display.newPolygon(group, 0, 0, vertices )

codepaladin

-- include the jumper library
local Grid = require ("jumper.jumper.grid")
local Pathfinder = require ("jumper.jumper.pathfinder")
local walkable = 0 -- used by Jumper to mark obstacles

local map = {}   -- table representing each grid position
local startX = 1 -- start x grid (cartesian) coordinate
local startY = 1 -- start y grid (cartesian) coordinate
local endX = 3   -- end x grid (cartesian) coordinate
local endY = 4   -- end y grid (cartesian) coordinate

codepaladin

-- find the path from point A to point B
function getPath()
   -- create a Jumper Grid object by passing in our map table
   local grid = Grid(map)

   -- Creates a pathfinder object using Jump Point Search
   local pather = Pathfinder(grid, 'JPS', walkable)
   pather:setMode("ORTHOGONAL") 
   
   -- Calculates the path, and its length

codepaladin

-- draw start position by using the pixel coordinates
-- set the startx and starty grid coordinates
function drawStart(xyPixelCoordinate, xyGridCoordinate)
   local myText = display.newText( "A", xyPixelCoordinate.x, xyPixelCoordinate.y, native.systemFont, 34 )
   myText:setFillColor( 255, 255, 255 )
   startx = xyGridCoordinate.x
   starty = xyGridCoordinate.y
end

-- draw end position by using the pixel coordinates

codepaladin

-- draw a tile map to the screen
-- populate the map table
function drawGrid()
   for row = 1, 10 do
      local gridRow = {}
      for col = 1, 10 do
         -- draw a tile
         local tile = display.newRect((col * 50) - 25, (row * 50) - 25, 48, 48)
         
         -- make some tiles un-walkable

codepaladin

-- main.lua

display.setStatusBar( display.HiddenStatusBar )

local Grid = require ("jumper.jumper.grid")
local Pathfinder = require ("jumper.jumper.pathfinder")

local map = {}       -- table representing each grid position 
local walkable = 0   -- used by Jumper to mark obstacles
local startx = 0     -- start x grid coordinate

codepaladin

	local allowableMoves = 3 -- how many tiles a character can move
	local x = 0 --starting x position on a grid
	local y = 0 --starting y position on a grid
	
	for xMoves = (x - allowableMoves), (x + allowableMoves) do 
	    for yMoves = (y - allowableMoves), (y + allowableMoves) do
	        if (math.abs(x - xMoves)) + (math.abs(y - yMoves)) <= allowableMoves then
	            print(xMoves ..","..yMoves) -- this is an allowable movement grid position
	        end
	    end

codepaladin

local sequenceData =
{
    name="walking",
    start=3,
    count=2,
    time=1000,
}

local character = display.newSprite( imageSheet, sequenceData )

codepaladin

local sequenceData =
{
    name="walking",
    start=3,
    count=2,
    time=1000,
}