add entity module

entity.lua

@@ -0,0 +1,58 @@
+local window = require('window')
+
+-- base prototype of all drawn things
+local m = {
+    _t = 'entity',
+    x = 0,
+    y = 0,
+    width = 0,
+    height = 0,
+}
+
+m.__index = m
+
+function m:new()
+    local t = {}
+    t.__index = t
+    return setmetatable(t, self)
+end
+
+function m:from(t)
+    t.__index = t
+    return setmetatable(t, self)
+end
+
+function m:setpos(x, y)
+    self.x = x
+    self.y = y
+end
+
+function m:draw()
+    love.graphics.push('all')
+    love.graphics.translate(self.x, self.y)
+    love.graphics.setLineWidth(3)
+
+    for _, l in ipairs(self.lines) do
+        local mode = l[1]
+        local segs = l[2]
+
+        if mode == 'line' then
+            love.graphics.line(segs)
+        elseif mode == 'fill' then
+            local ts = love.math.triangulate(segs)
+            love.graphics.setColor(0, 0, 0)
+            for _, t in ipairs(ts) do
+                love.graphics.polygon('fill', ts)
+            end
+
+            love.graphics.setColor(1, 1, 1)
+            love.graphics.polygon('line', segs)
+        else
+            error(string.format("mode must be one of line or fill, not %s", mode))
+        end
+    end
+
+    love.graphics.pop()
+end
+
+return m

item.lua

@@ -1,36 +1,21 @@
 local window = require('window')
+local entity = require('entity')
 -- item prototype
 -- name
 -- image
 -- description
 
-local m = {
+local m = entity:from{
     _t = 'item',
-    x = 0,
-    y = 0,
     width = 60,
     height = 60,
     name = "item",
     description = "sample description",
 }
 
-function m:new()
-    local mt = { __index = m }
-    local i = {}
-    setmetatable(i, mt)
-    return i
-end
+--[[ Item  ]]--
 
-function m:setpos(x, y)
-    self.x = x
-    self.y = y
-end
-
-function m:draw()
-    love.graphics.draw(self.image, self.x, self, y)
-end
-
-function m:pickupMode(room)
+function m:pickupMode()
     self.mousepressed = window.mousepressed(function (self, x, y, button)
         self:itemMode()
         self.room:remove(self)
@@ -44,4 +29,12 @@ function m:itemMode()
     end)
 end
 
+function m:install(room, x, y)
+    local i = self:new()
+    i.room = room
+    i:pickupMode()
+    i:setpos(x, y)
+    room:insert(i)
+end
+
 return m

item/crowbar.lua

@@ -1,16 +1,11 @@
 local item = require('item')
 
-local m = item:new()
-
-m.name = "Crowbar"
-m.description = "A durable tool for opening wooden boxes."
-
-function m:draw()
-    love.graphics.push('all')
-    love.graphics.translate(self.x, self.y)
-    love.graphics.setLineWidth(3)
-    love.graphics.line(10, 20, 20, 10, 25, 10, 30, 20, 40, 50)
-    love.graphics.pop()
-end
+local m = item:from{
+    name = "Crowbar",
+    description = "A durable tool for opening wooden boxes.",
+    lines = {
+        {'line', {10, 20, 20, 10, 25, 10, 30, 20, 40, 50}}
+}
+}
 
 return m

object.lua

@@ -1,16 +0,0 @@
-local window = require('window')
--- prototype of immovable objects
-
-local m = {}
-m.__index = m
-
-function m:new()
-    return setmetatable({}, self)
-end
-
-m.mousepressed = window.mousepressed(function (self, x, y, button)
-    end)
-
-function m:draw()
-    love.graphics.draw(self.image, self.x, self.y)
-end

room.lua

@@ -1,10 +1,11 @@
 local window = require('window')
+local entity = require('entity')
 
 -- prototype of room
 -- - background
 -- - objects
 -- - edges
-local room = {
+local room = entity:from{
     x = 0, y = 0,
     background = love.graphics.newImage("res/defaultbg.png"),
     edges = {},
@@ -26,14 +27,6 @@ function edge_position(e)
     return p[1], p[2]
 end
 
-local mt = { __index = room }
-
-function room:new()
-    local m = {}
-    setmetatable(m, mt)
-    return m
-end
-
 function room:insert(obj)
     table.insert(self.objects, obj)
     obj.idx = #self.objects

room/default.lua

@@ -5,9 +5,6 @@ local r = room:new()
 r.background = love.graphics.newImage("res/defaultbg.png")
 
 local crowbar = require('item/crowbar')
-crowbar:pickupMode()
-crowbar:setpos(100, 160)
-crowbar.room = r
-r:insert(crowbar)
+crowbar:install(r, 100, 160)
 
 return r