Version 0.4.0 (rework)

README.txt

@@ -1,28 +1,21 @@
 Minetest Mod - Simple Shooter [shooter]
 =======================================
 
-Mod Version: 0.3.0
+Mod Version: 0.4.0
 
-Minetest Version: 0.4.8-dev d9ef072305
+Minetest Version: 0.4.9
 
-Depends: default
-
-An experimental first person shooter mod using simple vector mathematics
-in an effort to find a more server-firendly method of hit detection from
-that which is currently being used by the firearms mod.
-
-For the most part I think I have achieved this for straight pvp, however,
-the jury is still out as to whether it is any faster against entities (mobs)
+An experimental first person shooter mod that uses simple vector mathematics
+to produce an accurate and server-firendly method of hit detection.
 
 By default this mod is configured to work only against other players in
-multiplayer (server) mode. This is overridden in singleplayer mode to work
-against all registered entities instead.
+multiplayer mode and against Simple Mobs [mobs] in singleplayer mode.
 
-Default configuration can be customised by adding a shooter.conf file to the
-mod's main directory, see shooter.conf.example for more details.
+Default configuration can be customised by adding a shooter.conf file to
+the mod's main directory, see shooter.conf.example for more details.
 
-This is still very much a work in progress which I plan to eventually use as
-the base for a 'Spades' style FPS game using the minetest engine.
+This is still very much a work in progress which I eventually plan to use
+as the base for a 'Spades' style FPS game using the minetest engine.
 
 Crafting
 ========
@@ -34,7 +27,7 @@ M = Mese Crystal [default:mese_crysytal]
 Pistol: [shooter:pistol]
 
 +---+---+
-| S | B |
+| S | S |
 +---+---+
 |   | M |
 +---+---+
@@ -59,3 +52,13 @@ Shotgun: [shooter:shotgun]
 |   | M | B |
 +---+---+---+
 
+Sub Machine Gun: [shooter:machine_gun]
+
++---+---+---+
+| S | S | S |
++---+---+---+
+|   | B | M |
++---+---+---+
+|   | B |   |
++---+---+---+
+

depends.txt

@@ -1,2 +0,0 @@
-default
-

init.lua

@@ -4,12 +4,15 @@ minetest.register_tool("shooter:pistol", {
 	description = "Pistol",
 	inventory_image = "shooter_pistol.png",
 	on_use = function(itemstack, user, pointed_thing)
+		local name = user:get_player_name()
 		shooter:fire_weapon(user, pointed_thing, {
-			range = 30,
-			tool_caps = {full_punch_interval=0.5, damage_groups={fleshy=1}},
+			name = name,
+			range = 100,
+			step = 20,
+			tool_caps = {full_punch_interval=0.5, damage_groups={fleshy=2}},
 			groups = {snappy=3, fleshy=3, oddly_breakable_by_hand=3},
 			sound = "shooter_pistol",
-			particle = "default_obsidian.png",
+			particle = "shooter_cap.png",
 		})
 		itemstack:add_wear(328) -- 200 Rounds
 		return itemstack
@@ -20,12 +23,15 @@ minetest.register_tool("shooter:riffle", {
 	description = "Riffle",
 	inventory_image = "shooter_riffle.png",
 	on_use = function(itemstack, user, pointed_thing)
+		local name = user:get_player_name()
 		shooter:fire_weapon(user, pointed_thing, {
-			range = 80,
-			tool_caps = {full_punch_interval=1.0, damage_groups={fleshy=2}},
+			name = name,
+			range = 200,
+			step = 30,
+			tool_caps = {full_punch_interval=1.0, damage_groups={fleshy=3}},
 			groups = {snappy=3, crumbly=3, choppy=3, fleshy=2, oddly_breakable_by_hand=2},
 			sound = "shooter_riffle",
-			particle = "default_gold_block.png",
+			particle = "shooter_bullet.png",
 		})
 		itemstack:add_wear(656) -- 100 Rounds
 		return itemstack
@@ -36,8 +42,11 @@ minetest.register_tool("shooter:shotgun", {
 	description = "Shotgun",
 	inventory_image = "shooter_shotgun.png",
 	on_use = function(itemstack, user, pointed_thing)
+		local name = user:get_player_name()
 		shooter:fire_weapon(user, pointed_thing, {
-			range = 15,
+			name = name,
+			range = 50,
+			step = 15,
 			tool_caps = {full_punch_interval=1.5, damage_groups={fleshy=4}},
 			groups = {cracky=3, snappy=2, crumbly=2, choppy=2, fleshy=1, oddly_breakable_by_hand=1},
 			sound = "shooter_shotgun",
@@ -48,10 +57,33 @@ minetest.register_tool("shooter:shotgun", {
 	end,
 })
 
+minetest.register_tool("shooter:machine_gun", {
+	description = "Sub Machine Gun",
+	inventory_image = "shooter_smgun.png",
+	on_use = function(itemstack, user, pointed_thing)
+		local name = user:get_player_name()
+		for i = 0, 0.45, 0.15 do
+			minetest.after(i, function()
+				shooter:fire_weapon(user, pointed_thing, {
+					name = name,
+					range = 100,
+					step = 20,
+					tool_caps = {full_punch_interval=0.1, damage_groups={fleshy=2}},
+					groups = {snappy=3, fleshy=3, oddly_breakable_by_hand=3},
+					sound = "shooter_pistol",
+					particle = "shooter_cap.png",
+				})
+			end)
+		end
+		itemstack:add_wear(328) -- 4 x 200 Rounds
+		return itemstack
+	end,
+})
+
 minetest.register_craft({
 	output = "shooter:pistol",
 	recipe = {
-		{"default:steel_ingot", "default:bronze_ingot"},
+		{"default:steel_ingot", "default:steel_ingot"},
 		{"", "default:mese_crystal"},
 	},
 })
@@ -74,3 +106,12 @@ minetest.register_craft({
 	},
 })
 
+minetest.register_craft({
+	output = "shooter:machine_gun",
+	recipe = {
+		{"default:steel_ingot", "default:steel_ingot", "default:steel_ingot"},
+		{"", "default:bronze_ingot", "default:mese_crystal"},
+		{"", "default:bronze_ingot", ""},
+	},
+})
+

shooter.conf.example

@@ -2,18 +2,42 @@
 
 -- Global Constants (defaults)
 
--- Particle texture used when target it hit
+-- Particle texture used when a player or entity it hit
 SHOOTER_EXPLOSION_TEXTURE = "shooter_hit.png"
 
 -- Allow node destruction
 SHOOTER_ALLOW_NODES = true
 
--- Maximum node rage, applies only if nodes are allowed
-SHOOTER_NODE_RANGE = 50
-
 -- Allow entities in multiplayer mode
 SHOOTER_ALLOW_ENTITIES = false
 
--- Maximum object range, applies only if entities are allowed
-SHOOTER_OBJECT_RANGE = 50
+-- Allow players in multiplayer mode
+SHOOTER_ALLOW_PLAYERS = true
+
+-- How often objects are fully reloaded
+SHOOTER_OBJECT_RELOAD_TIME = 1
+
+-- How often object positions are updated
+SHOOTER_OBJECT_UPDATE_TIME = 0.25
+
+-- How often rounds are processed
+SHOOTER_ROUNDS_UPDATE_TIME = 0.4
+
+-- Player collision box offset (may require adjustment for some games)
+SHOOTER_PLAYER_OFFSET = {x=0, y=1, z=0}
+
+-- Entity collision box offset (may require adjustment for other mobs)
+SHOOTER_ENTITY_OFFSET = {x=0, y=0, z=0}
+
+-- Shootable entities (default support for Simple Mobs)
+SHOOTER_ENTITIES = {
+	"mobs:dirt_monster",
+	"mobs:stone_monster",
+	"mobs:sand_monster",
+	"mobs:tree_monster",
+	"mobs:sheep",
+	"mobs:rat",
+	"mobs:oerkki",
+	"mobs:dungeon_master",
+}
 

shooter.lua

@@ -1,10 +1,39 @@
-shooter = {}
+shooter = {
+	time = 0,
+	objects = {},
+	rounds = {},
+	shots = {},
+}
 
 SHOOTER_EXPLOSION_TEXTURE = "shooter_hit.png"
 SHOOTER_ALLOW_NODES = true
 SHOOTER_ALLOW_ENTITIES = false
-SHOOTER_NODE_RANGE = 50
-SHOOTER_OBJECT_RANGE = 50
+SHOOTER_ALLOW_PLAYERS = true
+SHOOTER_OBJECT_RELOAD_TIME = 1
+SHOOTER_OBJECT_UPDATE_TIME = 0.25
+SHOOTER_ROUNDS_UPDATE_TIME = 0.4
+SHOOTER_PLAYER_OFFSET = {x=0, y=1, z=0}
+SHOOTER_ENTITY_OFFSET = {x=0, y=0, z=0}
+SHOOTER_ENTITIES = {
+	"mobs:dirt_monster",
+	"mobs:stone_monster",
+	"mobs:sand_monster",
+	"mobs:tree_monster",
+	"mobs:sheep",
+	"mobs:rat",
+	"mobs:oerkki",
+	"mobs:dungeon_master",
+}
+
+if minetest.is_singleplayer() == true then
+	SHOOTER_ALLOW_ENTITIES = true
+	SHOOTER_ALLOW_PLAYERS = false
+end
+
+local allowed_entities = {}
+for _,v in ipairs(SHOOTER_ENTITIES) do
+	allowed_entities[v] = 1
+end
 
 local modpath = minetest.get_modpath(minetest.get_current_modname())
 local input = io.open(modpath.."/shooter.conf", "r")
@@ -13,13 +42,17 @@ if input then
 	input:close()
 	input = nil
 end
-if minetest.is_singleplayer() == true then
-	SHOOTER_ALLOW_ENTITIES = true
+
+local rounds_update_time = 0
+local object_update_time = 0
+local object_reload_time = 0
+
+local function get_dot_product(v1, v2)
+	return v1.x * v2.x + v1.y * v2.y + v1.z * v2.z
 end
-local timer = 0
-local shots = {}
 
 local function spawn_particles(p, v, d, texture)
+	if p and v and d then
 		if type(texture) ~= "string" then
 			texture = SHOOTER_EXPLOSION_TEXTURE
 		end
@@ -32,20 +65,25 @@ local function spawn_particles(p, v, d, texture)
 			{x=-2, y=-2, z=-2}, {x=2, y=-2, z=2},
 			0.1, 0.75, 1, 2, false, texture
 		)
+	end
 end
 
 local function is_valid_object(object)
+	if object then
 		if object:is_player() == true then
 			return true
 		end
 		if SHOOTER_ALLOW_ENTITIES == true then
 			local luaentity = object:get_luaentity()
 			if luaentity then
-			if minetest.registered_entities[luaentity.name] then
+				if luaentity.name then
+					if allowed_entities[luaentity.name] then
 						return true
 					end
 				end
 			end
+		end
+	end
 	return false
 end
 
@@ -64,16 +102,15 @@ local function punch_node(pos, def)
 			if level >= v then
 				minetest.remove_node(pos)
 				local sounds = item.sounds
-				if sounds then
-					local soundspec = sounds.dug
-					if soundspec then
-						soundspec.pos = pos
-						minetest.sound_play(soundspec.name, soundspec)
+				if item.sounds then
+					local spec = item.sounds.dug
+					if spec then
+						spec.pos = pos
+						minetest.sound_play(spec.name, spec)
 					end
 				end
-				local tiles = item.tiles
-				if tiles then
-					return tiles[1]
+				if item.tiles then
+					return item.tiles[1]
 				end
 				break
 			end
@@ -81,17 +118,81 @@ local function punch_node(pos, def)
 	end
 end
 
+local function process_round(round)
+	local target = {object=nil, distance=10000}
+	local p1 = round.pos
+	local v1 = round.ray
+	for _,ref in ipairs(shooter.objects) do
+		local p2 = vector.add(ref.pos, ref.offset)
+		if p1 and p2 and ref.name ~= round.name then
+			local x = vector.distance(p1, p2)
+			if x < round.def.step then
+				local n = vector.multiply(v1, {x=-1, y=0, z=-1})
+				local v2 = vector.subtract(p1, p2)
+				local r1 = get_dot_product(n, v2)
+				local r2 = get_dot_product(n, v1)
+				if r2 ~= 0 then
+					local t = -(r1 / r2)
+					local td = vector.multiply(v1, {x=t, y=t, z=t})
+					local pt = vector.add(p1, td)
+					local pd = vector.subtract(pt, p2)
+					if math.abs(pd.x) < ref.collisionbox[4] and
+							math.abs(pd.y) < ref.collisionbox[5] and
+							math.abs(pd.z) < ref.collisionbox[6] then
+						target.object = ref.object
+						target.pos = pt
+						target.distance = x
+					end
+				end
+			end
+		end
+	end
+	if target.object and target.pos then
+		local success, pos = minetest.line_of_sight(p1, target.pos, 1)
+		if success then
+			local user = minetest.get_player_by_name(round.name)
+			if user then
+				target.object:punch(user, nil, round.def.tool_caps, v1)
+				spawn_particles({x=p1.x, y=p1.y - 1, z=p1.z}, v1,
+					target.distance, SHOOTER_EXPLOSION_TEXTURE)
+			end
+			return 1
+		elseif pos and SHOOTER_ALLOW_NODES == true then
+			local texture = punch_node(pos, round.def)
+			if texture then
+				spawn_particles({x=p1.x, y=p1.y - 1, z=p1.z},
+					v1, vector.distance(p1, pos), texture)
+			end
+			return 1
+		end
+	elseif SHOOTER_ALLOW_NODES == true then
+		local d = round.def.step
+		local p2 = vector.add(p1, vector.multiply(v1, {x=d, y=d, z=d}))
+		local success, pos = minetest.line_of_sight(p1, p2, 1)
+		if pos then
+			local texture = punch_node(pos, round.def)
+			if texture then
+				spawn_particles({x=p1.x, y=p1.y - 1, z=p1.z},
+					v1, vector.distance(p1, pos), texture)
+			end
+			return 1
+		end
+	end
+end
+
 function shooter:fire_weapon(user, pointed_thing, def)
-	local name = user:get_player_name()
-	if shots[name] then
-		if timer < shots[name] then
+	if shooter.shots[def.name] then
+		if shooter.time < shooter.shots[def.name] then
 			return
 		end
 	end
-	shots[name] = timer + def.tool_caps.full_punch_interval
+	shooter.shots[def.name] = shooter.time + def.tool_caps.full_punch_interval
 	minetest.sound_play(def.sound, {object=user})
 	local v1 = user:get_look_dir()
 	local p1 = user:getpos()
+	if not v1 or not p1 then
+		return
+	end
 	minetest.add_particle({x=p1.x, y=p1.y + 1.6, z=p1.z},
 		vector.multiply(v1, {x=30, y=30, z=30}),
 		{x=0, y=0, z=0}, 0.5, 0.25,
@@ -104,7 +205,6 @@ function shooter:fire_weapon(user, pointed_thing, def)
 			spawn_particles({x=p1.x, y=p1.y + 0.75, z=p1.z},
 				v1, vector.distance(p1, pos), texture)
 		end
-		return
 	elseif pointed_thing.type == "object" then
 		local object = pointed_thing.ref
 		if is_valid_object(object) == true then
@@ -112,82 +212,81 @@ function shooter:fire_weapon(user, pointed_thing, def)
 			local p2 = object:getpos()
 			spawn_particles({x=p1.x, y=p1.y + 0.75, z=p1.z}, v1,
 				vector.distance(p1, p2), SHOOTER_EXPLOSION_TEXTURE)
-			return
 		end
+	else
+		shooter:update_objects()
+		table.insert(shooter.rounds, {
+			name = def.name,
+			pos = vector.add(p1, {x=0, y=1.75, z=0}),
+			ray = v1,
+			dist = 0,
+			def = def,
+		})
 	end
-	if def.range > 100 then
-		def.range = 100
-	end
-	local target = {object=nil, distance=100}
+end
+
+function shooter:load_objects()
 	local objects = {}
+	if SHOOTER_ALLOW_PLAYERS == true then
+		local players = minetest.get_connected_players()
+		for _,player in ipairs(players) do
+			local pos = player:getpos()
+			local name = player:get_player_name()
+			local hp = player:get_hp() or 0
+			if pos and name and hp > 0 then
+				table.insert(objects, {
+					name = name,
+					object = player,
+					pos = pos,
+					collisionbox = {-0.25,-1.0,-0.25, 0.25, 0.8, 0.25},
+					offset = SHOOTER_PLAYER_OFFSET,
+				})
+			end
+		end
+	end
 	if SHOOTER_ALLOW_ENTITIES == true then
-		local range = def.range
-		if range > SHOOTER_OBJECT_RANGE then
-			range = SHOOTER_OBJECT_RANGE
-		end
-		local r = math.ceil(range * 0.5)
-		local p = vector.add(p1, vector.multiply(v1, {x=r, y=r, z=r}))
-		objects = minetest.get_objects_inside_radius(p, r)
-	else
-		objects = minetest.get_connected_players()
-	end
-	for _,object in ipairs(objects) do
-		if is_valid_object(object) == true then
-			local p2 = object:getpos()
-			if p1 and p2 then
-				local x = vector.distance(p1, p2)
-				p2.y = p2.y - 0.75
-				if x > 0 and x < target.distance and x < def.range then
-					local yx = 0
-					if x > 30 then
-						yx = 0.001 * (10 - x * 0.1)
-					else
-						yx = 0.00002 * (x * x) - 0.002 * x + 0.05
-					end
-					local yy = yx * 3
-					local v2 = vector.normalize(vector.direction(p1, p2))
-					local vd = vector.subtract(v1, v2)
-					if math.abs(vd.x) < yx and
-					math.abs(vd.z) < yx and
-					math.abs(vd.y) < yy then
-						target = {
-							object = object,
-							distance = x,
-							pos = {x=p2.x, z=p2.z, y=p2.y+1.75},
-						}
+		for _,ref in pairs(minetest.luaentities) do
+			if ref.object and ref.name then
+				if allowed_entities[ref.name] then
+					local pos = ref.object:getpos()
+					local hp = ref.object:get_hp() or 0
+					if pos and hp > 0 then
+						local def = minetest.registered_entities[ref.name]
+						table.insert(objects, {
+							name = ref.name,
+							object = ref.object,
+							pos = pos,
+							collisionbox = def.collisionbox,
+							offset = SHOOTER_ENTITY_OFFSET,
+						})
 					end
 				end
 			end
 		end
 	end
-	local view_pos = {x=p1.x, y=p1.y + 1.75, z=p1.z}
-	if target.object then
-		local success, pos = minetest.line_of_sight(view_pos, target.pos, 1)
-		if success then
-			target.object:punch(user, nil, def.tool_caps, v1)
-			spawn_particles({x=p1.x, y=p1.y + 0.75, z=p1.z}, v1,
-			target.distance, SHOOTER_EXPLOSION_TEXTURE)
-		elseif pos and SHOOTER_ALLOW_NODES == true then
-			local texture = punch_node(pos, def)
-			if texture then
-				spawn_particles({x=p1.x, y=p1.y + 0.75, z=p1.z},
-				v1, vector.distance(p1, pos), texture)
+	object_reload_time = shooter.time
+	object_update_time = shooter.time
+	shooter.objects = {}
+	for _,v in ipairs(objects) do
+		table.insert(shooter.objects, v)
 	end
-		end
-	elseif SHOOTER_ALLOW_NODES == true then
-		local d = def.range
-		if d > SHOOTER_NODE_RANGE then
-			d = SHOOTER_NODE_RANGE
-		end
-		local p2 = vector.add(view_pos, vector.multiply(v1, {x=d, y=d, z=d}))
-		local success, pos = minetest.line_of_sight(view_pos, p2, 1)
+end
+
+function shooter:update_objects()
+	if shooter.time - object_reload_time > SHOOTER_OBJECT_RELOAD_TIME then
+		shooter:load_objects()
+	elseif shooter.time - object_update_time > SHOOTER_OBJECT_UPDATE_TIME then
+		for i, ref in ipairs(shooter.objects) do
+			if ref.object then
+				local pos = ref.object:getpos()
 				if pos then
-			local texture = punch_node(pos, def)
-			if texture then
-				spawn_particles({x=p1.x, y=p1.y + 0.75, z=p1.z},
-				v1, vector.distance(p1, pos), texture)
+					shooter.objects[i].pos = pos
+				end
+			else
+				table.remove(shooter.objects, i)
 			end
 		end
+		object_update_time = shooter.time
 	end
 end
 
@@ -196,6 +295,25 @@ minetest.register_on_joinplayer(function(player)
 end)
 
 minetest.register_globalstep(function(dtime)
-	timer = timer + dtime
+	shooter.time = shooter.time + dtime
+	if shooter.time - rounds_update_time > SHOOTER_ROUNDS_UPDATE_TIME then
+		for i, round in ipairs(shooter.rounds) do
+			if process_round(round) or round.dist > round.def.range then
+				table.remove(shooter.rounds, i)
+			else
+				local v = vector.multiply(round.ray, round.def.step)
+				shooter.rounds[i].pos = vector.add(round.pos, v)
+				shooter.rounds[i].dist = round.dist + round.def.step
+			end
+		end
+		rounds_update_time = shooter.time
+	end
+	if shooter.time > 100000 then
+		shooter.shots = {}
+		rounds_update_time = 0
+		object_reload_time = 0
+		object_update_time = 0
+		shooter.time = 0
+	end
 end)