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drawlist.lua
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drawlist.lua
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local getIndex = function(self,the_layer)
for i,layer in ipairs(self.layers) do
if layer == the_layer then return i end
end
end
local t = setmetatable({},{__call = function(self,...) return self.new(...) end})
t.__call = function(self,name) return self:getLayer(name) end
t.__index = t
function t.new()
local d = {
layers = {},
settings = {},
x = 0,
y = 0,
properties= {},
atlases = {},
}
return setmetatable(d,t)
end
function t:getLayer(name)
return self.settings[name] and self.settings[name].layer
end
function t:insert(name,layer,xtranscale,ytranscale,isDrawable)
xtranscale= xtranscale or 1
ytranscale= ytranscale or xtranscale
table.insert(self.layers,layer)
local t = self.settings[name] or {}
self.settings[name] = t
self.settings[layer]= t
t.isDrawable = isDrawable== nil and true or isDrawable
t.xtranscale = xtranscale
t.ytranscale = ytranscale
t.layer = layer
end
function t:remove(name)
local the_layer = self:getLayer(name)
for i,layer in ipairs(self.layers) do
if layer == the_layer then table.remove(self.layers,i) break end
end
self.settings[name] = nil
self.settings[the_layer] = nil
return the_layer
end
function t:clear()
self.layers = {}
self.settings = {}
self.x,self.y = 0,0
end
function t:swap(name1,name2)
local layer1 = self:getLayer(name1)
local layer2 = self:getLayer(name2)
local i1,i2
for i,layer in ipairs(self.layers) do
if layer == layer1 then i1 = i end
if layer == layer2 then i2 = i end
if i1 and i2 then
break
end
end
self.layers[i1],self.layers[i2] = layer2,layer1
end
local directions = {
down = function(layers,index)
if index < 1 then return end
layers[index-1],layers[index] = layers[index],layers[index-1]
end,
up = function(layers,index)
if index == #layers then return end
layers[index+1],layers[index] = layers[index],layers[index+1]
end,
top = function(layers,index) table.insert(layers, table.remove(layers,index) ) end,
bottom = function(layers,index) table.insert(layers, 1, table.remove(layers,index) ) end,
}
function t:move(name,direction)
assert(directions[direction],'Invalid direction')
local index = getIndex(self:getLayer(name))
directions[direction](self.layers,index)
end
function t:sort(func)
table.sort(self.layers,func)
end
function t:setDrawable(name,bool)
if bool == nil then error('expected true or false for drawable') end
self.settings[name].isDrawable = bool
end
function t:isDrawable(name)
return self.settings[name].isDrawable
end
function t:translate(dx,dy)
self.x,self.y = self.x+dx,self.y+dy
end
function t:setTranslation(x,y)
self.x,self.y = x,y
end
function t:getTranslation()
return self.x,self.y
end
function t:setTranslationScale(name,xscale,yscale)
self.settings[name].xtranscale = xscale
self.settings[name].ytranscale = yscale or xscale
end
function t:getTranslationScale(name)
return self.settings[name].xtranscale, self.settings[name].ytranscale
end
function t:iterate()
return ipairs(self.layers)
end
function t:callback(callback_name,...)
if callback_name == 'draw' then return t.draw(self,...) end
for i,layer in ipairs(self.layers) do
if layer[callback_name] then layer[callback_name](layer,...) end
end
end
function t:draw(...)
local set = self.settings
for i,layer in ipairs(self.layers) do
love.graphics.push()
local xscale = self.settings[layer].xtranscale
local yscale = self.settings[layer].ytranscale
local dx,dy = xscale*self.x, yscale*self.y
love.graphics.translate(dx,dy)
if set[layer].isDrawable then
if layer.draw then layer:draw(...) end
end
love.graphics.pop()
end
end
-- ####################################
-- TMX RELATED FUNCTIONS
-- ####################################
function t:getAtlas(name)
return self.atlases[name]
end
function t:getMapProperties()
return self.properties
end
return t