Implement Atlas anchors

animation.lua

@@ -58,8 +58,7 @@ end
 ---@param y number The Y position to draw at.
 function Animation:draw(index, x, y)
   local frame = self.frames[index]
-  local mesh = frame.atlas.meshes[frame.sprite]
-  love.graphics.draw(mesh, x, y)
+  frame.atlas:draw(frame.sprite, x, y)
 end
 
 return Animation

atlas.lua

@@ -9,7 +9,9 @@ local Atlas = Object:extend()
 ---@param image love.Image The source image for the atlas.
 ---@param sw integer The width of each sprite.
 ---@param sh integer The height of each sprite.
-function Atlas:new(image, sw, sh)
+---@param ax integer? The anchor X coordinate of each sprite. Defaults to 0.
+---@param ay integer? The anchor Y coordinate of each sprite. Defaults to 0.
+function Atlas:new(image, sw, sh, ax, ay)
   ---The source image of the atlas.
   self.image = image
 
@@ -19,6 +21,12 @@ function Atlas:new(image, sw, sh)
   ---The height of each atlas's sprite.
   self.sh = sh
 
+  ---The anchor X coordinate of each sprite.
+  self.ax = ax or 0
+
+  ---The anchor Y coordinate of each sprite.
+  self.ay = ay or 0
+
   ---The width of the atlas in texels.
   self.iw = image:getPixelWidth()
 
@@ -61,4 +69,13 @@ function Atlas:new(image, sw, sh)
   end
 end
 
+---Draws a sprite at a given location.
+---@param sprite integer The index of the sprite to draw.
+---@param x integer The X coordinate to draw at.
+---@param y integer The Y coordinate to draw at.
+function Atlas:draw(sprite, x, y)
+  local mesh = self.meshes[sprite]
+  love.graphics.draw(mesh, x - self.ax, y - self.ay)
+end
+
 return Atlas

font.lua

@@ -32,7 +32,7 @@ function Font:draw(text, x, y)
     local sprite = self.characters[c]
     if sprite then
       local x = (i - 1) * self.sw + x
-      love.graphics.draw(self.meshes[sprite], x, y)
+      Font.super.draw(self, sprite, x, y)
     end
   end
 end

main.lua

@@ -72,7 +72,7 @@ function love.draw()
   push:start()
 
   BlockyFont:draw("Hello, world!")
-  ActiveUnit:draw(100, 100)
+  ActiveUnit:draw(240, 180)
   UnitMenu:draw()
 
   if StateMenu then

nine_slice.lua

@@ -16,7 +16,7 @@ function NineSlice:draw(x, y, width, height)
     local gy = y + ty * sh
 
     if sprite then
-      love.graphics.draw(atlas.meshes[sprite], gx, gy)
+      atlas:draw(sprite, gx, gy)
     else
       love.graphics.rectangle("fill", gx, gy, sw, sh)
     end

units.lua

@@ -11,8 +11,8 @@ local function rowState(atlas, row, len, on_finish, next)
   return spannedState(atlas, start, len, on_finish, next)
 end
 
-local leafRanger = Atlas(love.graphics.newImage("assets/leaf-ranger.png"), 288, 128)
-local bringerOfDeath = Atlas(love.graphics.newImage("assets/bringer-of-death.png"), 140, 93)
+local leafRanger = Atlas(love.graphics.newImage("assets/leaf-ranger.png"), 288, 128, 144, 128)
+local bringerOfDeath = Atlas(love.graphics.newImage("assets/bringer-of-death.png"), 140, 93, 105, 93)
 
 return {
   {