Include obake npc

collisions.lua

@@ -44,6 +44,7 @@ function solid_at(x, y, exclude)
 
 		if  x >= e.x and x < e.x + e.width
 		and y >= e.y and y < e.y + e.height
+		and e.type == "ground"
 		and e ~= exclude
 		then
 			return true;

main.lua

@@ -2,6 +2,7 @@ require "global"
 require "tiled"
 require "anim"
 require "ninja"
+require "obake"
 
 function lutro.conf(t)
 	t.width  = SCREEN_WIDTH
@@ -25,7 +26,9 @@ function lutro.load()
 	lutro.graphics.setFont(font)
 	map = tiled_load("assets/pagode.json")
 	tiled_load_objects(map, add_entity_from_map)
-	table.insert(entities, newNinja())
+	ninja = newNinja()
+	table.insert(entities, ninja)
+	table.insert(entities, newObake())
 end
 
 function lutro.update(dt)

ninja.lua

@@ -172,14 +172,18 @@ function ninja:draw()
 end
 
 function ninja:on_collide(e1, e2, dx, dy)
-	if math.abs(dy) < math.abs(dx) and dy ~= 0 then
-		self.yspeed = 0
-		self.y = self.y + dy
-		lutro.audio.play(self.sfx.step)
-	end
+	if e2.type == "ground" then
+
+		if math.abs(dy) < math.abs(dx) and dy ~= 0 then
+			self.yspeed = 0
+			self.y = self.y + dy
+			lutro.audio.play(self.sfx.step)
+		end
+
+		if math.abs(dx) < math.abs(dy) and dx ~= 0 then
+			self.xspeed = 0
+			self.x = self.x + dx
+		end
 
-	if math.abs(dx) < math.abs(dy) and dx ~= 0 then
-		self.xspeed = 0
-		self.x = self.x + dx
 	end
 end

obake.lua

@@ -0,0 +1,62 @@
+require "collisions"
+
+local obake = {}
+obake.__index = obake
+
+function newObake()
+	local n = {}
+	n.width = 16
+	n.height = 16
+	n.xspeed = 0
+	n.yspeed = 0
+	n.x = (SCREEN_WIDTH - n.width)
+	n.y = 180
+	n.direction = "left"
+	n.stance = "fly"
+	n.t = 0
+
+	n.animations = {
+		fly = {
+			left  = newAnimation(lutro.graphics.newImage(
+				"assets/obake_fly_left.png"),  48, 48, 100, 10),
+			right = newAnimation(lutro.graphics.newImage(
+				"assets/obake_fly_right.png"), 48, 48, 100, 10)
+		},
+	}
+
+	n.anim = n.animations[n.stance][n.direction]
+	return setmetatable(n, obake)
+end
+
+function obake:update(dt)
+	self.t = self.t + dt
+
+	-- apply speed
+	self.x = self.x + self.xspeed * dt;
+
+	self.x = self.x + math.cos(self.t/2.0) / 2.0
+	self.y = self.y + math.cos(self.t*2.0) / 4.0
+
+	if self.x > ninja.x then
+		self.direction = "left"
+	else
+		self.direction = "right"
+	end
+
+	local anim = self.animations[self.stance][self.direction]
+	-- always animate from first frame 
+	if anim ~= self.anim then
+		anim.timer = 0
+	end
+	self.anim = anim;
+
+	self.anim:update(dt)
+end
+
+function obake:draw()
+	self.anim:draw(self.x - 16, self.y - 16)
+end
+
+function obake:on_collide(e1, e2, dx, dy)
+
+end