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package.path = package.path..";"..RL.GetBasePath().."../resources/lib/?.lua"
Util = require( "utillib" )
Vector2 = require( "vector2" )
Rectangle = require( "rectangle" )
local atlasTexture = nil
local atlasRects = {}
local atlasSize = Vector2:new()
local atlasPadding = 1
local imgPaths = {
"tile.png",
"apple.png",
"snake.png",
"wabbit_alpha.png",
"nPatch.png",
"open-folder.png",
"cat.png",
"tiles.png",
"monkey_tex.png",
}
local function makeAtlas()
local images = {}
local pathPrefix = RL.GetBasePath().."../resources/images/"
for i, path in ipairs( imgPaths ) do
images[i] = RL.LoadImage( pathPrefix..path )
local imgSize = Vector2:newT( RL.GetImageSize( images[i] ) )
atlasRects[i] = Rectangle:new( 0, 0, imgSize.x, imgSize.y )
end
atlasSize:setT( RL.GetScreenSize() )
atlasRects = RL.RectPack( atlasRects, atlasSize, atlasPadding )
local atlasImg = RL.GenImageColor( atlasSize, RL.BLANK )
for i, rect in ipairs( atlasRects ) do
print( "Rect", i, Rectangle:tempT( rect ) )
RL.ImageDraw( atlasImg, images[i],
{ 0, 0, rect[3], rect[4] },
rect,
RL.WHITE
)
end
RL.ImageAlphaCrop( atlasImg, 0 )
print( "Cropped size", Vector2:tempT( RL.GetImageSize( atlasImg ) ) )
atlasTexture = RL.LoadTextureFromImage( atlasImg )
end
function RL.init()
RL.SetWindowTitle( "Texture Atlas" )
RL.SetWindowState( RL.FLAG_VSYNC_HINT )
makeAtlas()
end
function RL.update( delta )
end
function RL.draw()
RL.ClearBackground( RL.DARKBLUE )
if atlasTexture then
RL.DrawTexture( atlasTexture, { 0, 0 }, RL.WHITE )
end
end
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