Added pong ball

2 files changed, 121 insertions, 2 deletions

diff --git a/pong/ball.lua b/pong/ball.lua
new file mode 100755
index 0000000..91c48f3
--- /dev/null
+++ b/pong/ball.lua
@@ -0,0 +1,108 @@
+
+
+
+
+minetest.register_entity("pong:ball", {
+	hp_max = 1,
+	physical = false,
+	collide_with_objects = false,
+	visual = "cube",
+	visual_size = {x = 0.25, y = 0.25},
+	textures = {
+		"default_cloud.png", "default_cloud.png", "default_cloud.png",
+		"default_cloud.png", "default_cloud.png", "default_cloud.png",
+	},
+	velocity = {x=math.random(-1,1), y=0, z=math.random(-1,1)},
+	direction = {x=1, y=0, z=1},
+	collisionbox = {-0.25, -0.25, -0.25, 0.25, 0.25, 0.25},
+	is_visible = true,
+	automatic_rotate = false,
+	makes_footstep_sound = false,
+	speed = 4,
+
+	update_velocity = function(self, direction)
+		if not self.speed then self.speed = 0 end
+
+		if not direction then
+			local yaw = self.object:getyaw()
+			self.direction = {x= -math.sin(yaw), y=0, z=math.cos(yaw)}
+		else
+			self.direction = direction
+		end
+		self.object:setvelocity(vector.multiply(self.direction, self.speed))
+	end,
+
+
+	on_player_collision = function(self, player)
+		local yaw = self.object:getyaw()
+
+		local pos = self.object:getpos()
+		local playerpos = player:getpos()
+
+		local playerdir = vector.direction(playerpos,pos)
+		playerdir.y = 0
+
+		local v = self.object:getvelocity()
+		if v.x < 1 and v.z < 1 then
+			self:update_velocity(playerdir)
+			return
+		end
+
+		--[[
+		if math.sign(playerdir.x) ~= math.sign(self.direction.x) then
+			self.direction.x = -self.direction.x
+			self:update_velocity(self.direction)
+		else
+			self.direction.z = -self.direction.z
+			self:update_velocity(self.direction)
+		end
+		--]]
+
+		if math.sign(playerdir.x) ~= math.sign(self.direction.x) then
+			self.object:setyaw((yaw + 90)%360)
+		elseif pos.z < playerpos.z then
+			self.object:setyaw((yaw - 90)%360)
+		end
+		self:update_velocity()
+	end,
+
+	on_step = function(self, dtime)
+		-- every 0.2 seconds
+		self.timer = (self.timer or 0) + dtime
+		if self.timer < 0.2 then return end
+		self.timer = 0
+
+		local pos = self.object:getpos()
+		local p = vector.add(pos, self.direction)
+		if p.x <= self.minp.x or p.x >= self.maxp.x then
+			self.direction.x = -self.direction.x
+			self:update_velocity(self.direction)
+		elseif p.z <= self.minp.z or p.z >= self.maxp.z then
+			self.direction.z = -self.direction.z
+			self:update_velocity(self.direction)
+		else
+			for _,obj in pairs(minetest.get_objects_inside_radius(pos,1)) do
+				if obj:is_player() == true then
+					self:on_player_collision(obj)
+					break
+				end
+			end
+		end
+	end,
+
+	-- This function should return the saved state of the entity in a string
+	get_staticdata = function(self)
+		return minetest.serialize({minp = self.minp, maxp = self.maxp})
+	end,
+
+	-- This function should load the saved state of the entity from a string
+	on_activate = function(self, staticdata)
+		self.object:set_armor_groups({immortal=1})
+		self.direction = vector.normalize(self.object:getvelocity())
+		if staticdata and staticdata ~= "" then
+			staticdata = minetest.deserialize(staticdata)
+			self.minp = staticdata.minp
+			self.maxp = staticdata.maxp
+		end
+	end
+})
diff --git a/pong/init.lua b/pong/init.lua
index 8c277df..b2ed3e1 100644
--- a/pong/init.lua
+++ b/pong/init.lua
@@ -1,3 +1,6 @@
+
+dofile(minetest.get_modpath("pong").."/ball.lua")
+
 local blocks = {
 	{"floor","Floor"},
 	{"dash","Dash"},
@@ -113,7 +116,7 @@ minetest.register_node("pong:block",{
 		"pong_floor.png",
 		"pong_floor.png",
 		"pong_dash.png",
-		},
+	},
 	drawtype = "normal",
 	paramtype = "light",
 	paramtype2 = "facedir",
@@ -121,6 +124,14 @@ minetest.register_node("pong:block",{
 	groups = {cracky = 1},
 	on_rightclick = function(pos, node, player, itemstack, pointed_thing)
 		local schem = minetest.get_modpath("pong").."/schems/pong.mts"
-		minetest.place_schematic({x=pos.x,y=pos.y-1,z=pos.z},schem,0, "air", true)
+		pos.y = pos.y - 1
+		minetest.place_schematic(pos,schem,0, "air", true)
+
+		local ballpos = vector.add(pos, {x=9,y=1,z=4})
+		local ball = minetest.add_entity(ballpos, "pong:ball"):get_luaentity()
+
+		-- give to the ball the boundaries of the field
+		ball.minp = vector.add(pos, {x=1,y=0,z=1})
+		ball.maxp = vector.add(pos, {x=17,y=2,z=8})
 	end,
 })