animated fox walk demo

lib/camera.lua

@@ -0,0 +1,8 @@
+require 'lib.entity'
+
+__Camera = {
+    pivotPosition = Vec3 {},
+    position = Vec3 {},
+    velocity = Vec3 {},
+    fixed = false,
+}

lib/entity.lua

@@ -6,9 +6,9 @@ __Entity = {
     sprite = __AnimatedSprite,
     position = Vec3 {},
     velocity = Vec3 {},
-    direction = 0, -- clockwise radians
+    rotation = 0, -- clockwise radians
     friction = 0.98,
-    speed = 1
+    speed = 1     -- m/s
 }
 
 function Entity(id)
@@ -32,20 +32,28 @@ function __Entity:processMovement()
 end
 
 function __Entity:namedDirection()
+    local get_direction_index = function(rotation)
+        local pi = math.pi
+        rotation = rotation % (2 * pi)
+        local shifted = (rotation + pi / 8) % (2 * pi)
+        local index = math.floor(shifted / (pi / 4)) + 1
+        return index
+    end
+
     local lookup = {
         "e",
-        "se",
-        "s",
-        "sw",
-        "w",
-        "nw",
+        "ne",
         "n",
-        "ne"
+        "nw",
+        "w",
+        "sw",
+        "s",
+        "se",
     }
-    local idx = math.floor((4 * self.direction / math.pi) + math.pi / 8) % 8
-    return lookup[idx + 1]
+
+    return lookup[get_direction_index(self.rotation)]
 end
 
 function __Entity:lookAt(vec)
-    self.direction = (vec - self.position):direction()
+    self.rotation = (vec - self.position):direction()
 end

lib/sprite.lua

@@ -8,7 +8,7 @@ function AnimatedSprite(id)
     local table = {}
     local bundle = AssetBundle.files.sprites[id]
     for key, value in pairs(bundle) do
-        table[key] = Animation(value, 64, 64)
+        table[key] = Animation(value, 96, 96)
     end
 
     return setmetatable(table, { __index = __AnimatedSprite })

lib/vec3.lua

@@ -54,7 +54,7 @@ function __Vec3:normalize()
 end
 
 function __Vec3:direction()
-    return math.atan2(self.y, self.x)
+    return -math.atan2(self.y, self.x)
 end
 
 function __Vec3:dot(other)

main.lua

@@ -34,7 +34,7 @@ function Player:init()
 end
 
 function Player:update(dt)
-    local speed = 30
+    local speed = 10
     local friction = 0.05
     local acc = vec2(0, 0)
 
@@ -66,31 +66,35 @@ require "lib.entity"
 require "lib.vec3"
 
 
-Deer = nil
+Fox = nil
 
 function love.load()
     AssetBundle:load()
-    Deer = Entity('deer')
-    Deer.position = Vec3 { 200, 200, 0 }
-    Deer.sprite.playing = "walk_e"
+    Player:init();
+
+    Fox = Entity('fox')
+    Fox.position = Vec3 { 200, 200, 0 }
+    Fox.sprite.playing = "walk_ne"
 end
 
 local lastDir
 function love.update(dt)
     local mouse = Vec3 { love.mouse.getPosition() }
-    if (mouse) then Deer:lookAt(mouse) end
+    if (mouse) then Fox:lookAt(mouse) end
 
-    if (lastDir and lastDir ~= Deer:namedDirection()) then
-        print(Deer:namedDirection())
+    if (lastDir and lastDir ~= Fox:namedDirection()) then
+        Fox.sprite.playing = "walk_" .. Fox:namedDirection()
     end
 
-    lastDir = Deer:namedDirection()
-    Deer:update(dt)
+    lastDir = Fox:namedDirection()
+    Player:update(dt)
+    Fox.position = Vec3 { Player.position().x, Player.position().y, 0 }
+    Fox:update(dt)
 end
 
 function love.draw()
-    love.graphics.draw(Deer.sprite:getTexture(), Deer.sprite:getQuad(), Deer.position.x, Deer.position.y, Deer.direction,
-        4, 4, 32, 32)
+    love.graphics.draw(Fox.sprite:getTexture(), Fox.sprite:getQuad(), Fox.position.x, Fox.position.y, Fox.direction,
+        2, 2, 48, 48)
 end
 
 function love.conf(t)