Moai grid with tile colors

Question

I'm trying to create a grid for a game using the Moai SDK. Each tile in the grid should have the ability to be filled with a color.

So actually I have two questions:

• What is the best way to build a grid using Moai
• How can I fill each tile individually with a color

Thanks

Callant

Answer 1

What is the best way to build a grid using Moai

Moai has an object for creating grids: MOAIGrid. Using the framework's jargon, you create a grid and give it a deck. Then you attach it to a prop and add the prop to a layer. (That layer also needs a viewport which is attached to a window.)

How can I fill each tile individually with a color

A Moai deck is an image or collection of images. If you wanted your tiles to be different colors then you would create a deck with images of the square in those colors.

Example

This code will create a 4x4 grid in a window:

-- Open the window and create a viewport
MOAISim.openWindow("Example", 512, 512)
viewport = MOAIViewport.new()
viewport:setSize(512, 512)
viewport:setScale(512, 512)

-- Create a layer
layer = MOAILayer2D.new()
layer:setViewport(viewport)
MOAISim.pushRenderPass(layer)

-- Create a 4x4 grid of 64x64px squares
grid = MOAIGrid.new()
grid:initGrid(4, 4, 64)
grid:setRow(1, 1, 1, 1, 1)
grid:setRow(2, 1, 1, 1, 1)
grid:setRow(3, 1, 1, 1, 1)
grid:setRow(4, 1, 1, 1, 1)

-- Load the image file
deck = MOAITileDeck2D.new()
deck:setTexture("squares.png")
deck:setSize(2, 2)

-- Make a prop with that grid and image set
prop = MOAIProp2D.new()
prop:setDeck(deck)
prop:setGrid(grid)
prop:setLoc(-256, -256)

-- Add it to the layer so it will be rendered
layer:insertProp(prop)

After that, if you want to change the color of a specific cell, use the setTile method to choose which item in the deck that cell uses.

-- Change the color of cell 1,1 to the second item in the deck
grid:setTile(1, 1, 2)

Director

In v1.4p0 (not sure exactly what version it was changed in) the line grid:initGrid(4, 4, 64) would be grid:initRectGrid(4, 4, 64, 64) – Kaolinite

Answer 2

Edited for entire code.

MOAISim.openWindow ( "test", 320, 480 )

viewport = MOAIViewport.new ()
viewport:setSize ( 320, 480 )
viewport:setScale ( 320, -480 )
viewport:setOffset(-1, 1)

layer = MOAILayer2D.new ()
layer:setViewport ( viewport )
MOAISim.pushRenderPass ( layer )


function createRect(x1,y1,x2,y2, R,G,B)
    local function onDraw()
        MOAIGfxDevice.setPenColor(R,G,B)
        MOAIDraw.fillRect(x1,y1,x1+x2,y1+y2) --This is the rect drawing line.
    end

    local gfxQuad = MOAIScriptDeck.new()
    gfxQuad:setRect(x1,y1,x2,y2)
    gfxQuad:setDrawCallback(onDraw)

    local prop = MOAIProp2D.new()
    prop:setDeck(gfxQuad)
    layer:insertProp ( prop )
    return prop
end

mapmaxx = 10
mapmaxy = 10
map={} --array to store map
for x = 1, mapmaxx do
    map[x] ={}
   for y = 1, mapmaxy do
       map[x][y] = createRect(x*20, y*20, 10, 10, x,y,x/y)
    end
end`

You should check out Rapanui, a high level API for Moai (where I paraphrased this code from)

Hypnogenesis

Answer 3

Building a grid is really just drawing a heap of squares in a grid formation. I don't know Moai's api; but I expect you can just drawSquare(x,y,width,height,color)

so you have:

local width = 800
local height = 600
local color = { red=1, blue=1, green=1 }
for x=1 , 100 do
    for y=1, 100 do
        screen:drawSquare((x-1)*width,(y-1)*height,width,height,color)
    end
end

Softshoe

Maybe I wasn't clear on my question. I'm porting my Corona game to Moai, so the logic is there, but I can't find the correct function(s) to draw a square and filling it with a color. Also I don't know if I should create each tile manually or if MOAIGrid would be an option. – Callant