server-nalc/mods/soccer/init.lua

local function reg_ball(color)
	local ball_item_name = "soccer:ball_" .. color .. "_item"
	local ball_ent_name = "soccer:ball_" .. color .. "_entity"

	minetest.register_entity(ball_ent_name, {
		physical = true,
		hp_max = 32767,
		collide_with_objects = false,
		visual = "mesh",
		visual_size = {x = 1.125, y = 1.125, z = 1.125},
		mesh = "soccer_ball.x",
		groups = {immortal = true},
		textures = {"soccer_ball_" .. color .. ".png"},
		collisionbox = { -0.25, -0.25, -0.25, 0.25, 0.25, 0.25},
		timer = 0,

		on_step = function(self, dtime)
			self.timer = self.timer + dtime
			if self.timer >= 0.2 then
				self.object:setacceleration({x = 0, y = -14.5, z = 0})
				self.timer = 0
				local vel = self.object:getvelocity()
				local p = self.object:getpos();
				p.y = p.y - 0.5
				if minetest.registered_nodes[minetest.env:get_node(p).name].walkable then
					vel.x = vel.x * 0.9
					if vel.y < 0 then vel.y = vel.y * -0.6 end
					vel.z = vel.z * 0.9
				end
				if (math.abs(vel.x) <= 0.1) and (math.abs(vel.z) <= 0.1) then
					vel.x = 0
					vel.z = 0
				end
				self.object:setvelocity(vel)
				local pos = self.object:getpos()
				local objs = minetest.env:get_objects_inside_radius(pos, 1)
				local player_count = 0
				local final_dir = {x = 0, y = 0, z = 0}
				for _,obj in ipairs(objs) do
					if obj:is_player() then
						local objdir = obj:get_look_dir()
						local mul = 1
						if (obj:get_player_control().sneak) then mul = 2 end
						final_dir.x = final_dir.x + (objdir.x * mul)
						final_dir.y = final_dir.y + (objdir.y * mul)
						final_dir.z = final_dir.z + (objdir.z * mul)
						player_count = player_count + 1
					end
				end
				if final_dir.x ~= 0 or final_dir.y ~= 0 or final_dir.z ~= 0 then
					final_dir.x = (final_dir.x * 7.2) / player_count
					final_dir.y = (final_dir.y * 9.6) / player_count
					final_dir.z = (final_dir.z * 7.2) / player_count
					self.object:setvelocity(final_dir)
					minetest.sound_play("default_dig_oddly_breakable_by_hand", {object = self.object, gain = 0.5})
				end
			end
		end,

		on_punch = function(self, puncher)
			if puncher and puncher:is_player() then
				local inv = puncher:get_inventory()
				inv:add_item("main", ItemStack(ball_item_name))
				self.object:remove()
			end
		end,

		is_moving = function(self)
			local v = self.object:getvelocity()
			if (math.abs(v.x) <= 0.1) and (math.abs(v.z) <= 0.1) then
				v.x = 0
				v.z = 0
				self.object:setvelocity(v)
				return false
			end
			return true
		end,
	})

	minetest.register_craftitem(ball_item_name, {
		description = "Soccer Ball ("..color..")",
		inventory_image = "soccer_ball_"..color.."_inv.png",
		wield_scale = {x = 0.75, y = 0.75, z = 4.5},
		on_place = function(itemstack, placer, pointed_thing)
			local pos = pointed_thing.above
			-- pos = { x =pos.x + 0.5, y = pos.y, z = pos.z + 0.5 }
			local ent = minetest.env:add_entity(pos, ball_ent_name)
			minetest.log("action", placer:get_player_name() .. " placed a ball at " .. minetest.pos_to_string(pointed_thing.above) .. ".")
			ent:setvelocity({x = 0, y = -14.5, z = 0})
			if not minetest.setting_getbool("creative_mode") then
				itemstack:take_item()
			end
			return itemstack
		end,
	})

	if color == "purple" then
		color = "pink"
	end
	minetest.register_craft({
		output = ball_item_name,
		recipe = {
			{ "", "wool:white", "" },
			{ "wool:white", "wool:" .. color, "wool:white" },
			{ "", "wool:white", "" },
		},
	})

end

colors = {
	"black", "red", "green", "blue", "yellow", "purple",
}

for _,color in ipairs(colors) do
	reg_ball(color)
end

minetest.register_alias("ball", "soccer:ball_black_item") -- For quickly using the /give command.

if minetest.setting_getbool("log_mods") then
	minetest.log("action", "Carbone: [soccer] loaded.")
end