Add particle effects and singleplayer support

LICENSE.txt

@@ -8,5 +8,8 @@ License Textures: Stuart Jones - WTFPL
 License Sounds: freesound.org
 
 	flobert1_20070728.wav by Nonoo - Attribution 3.0 Unported (CC BY 3.0)
+	
+	shot.wav by Sergenious -  Attribution 3.0 Unported (CC BY 3.0)
+
 	GUNSHOT.WAV by erkanozan - CC0 1.0 Universal (CC0 1.0)
 

README.txt

@@ -1,38 +1,37 @@
 Minetest Mod - Simple Shooter [shooter]
 =======================================
 
-Mod Version: 0.1.0
+Mod Version: 0.2.0
 
 Minetest Version: 0.4.8
 
 Depends: default
 
-An experimental first person shooter mod using vector mathematics instead of
+An experimental first person shooter mod using simple vector mathematics
-physical projectile entities. This has a number of advantages along with a
+in an effort to find a more server-firendly method of hit detection from
-number disadvantages.
+that which is currently being used by the firearms mod.
 
-Pros:
+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)
+One big downside of this method is that it only works against ordinary nodes
+within pointable range of the player.
 
-Fast and responsive
+By default this mod is configured to work only against other players in
-Fairly light weight
+multiplayer (server) mode. This is overridden in singleplayer mode to work
-Not affected by chunk boundaries
+against all registered entities instead.
 
-Cons:
+Default configuration can be customised by adding a shooter.conf file to the
+mod's main directory, see shooter.conf.example for more details.
 
-Only works against other players
+This is still very much a work in progress which I plan to eventually use as
-Slightly less realistic
+the base for a 'Spades' style FPS game using the minetest engine.
-
-This is still very much a work in progress and currently not much use in a
-singleplayer game. I plan to eventually use this as a base for a 'Spades' style
-FPS game using the minetest engine, however, I decided to add a couple of craft
-recipes and release this simple version for minetest_game.
 
 Crafting
 ========
 
 S = Steel Ingot  [default:steel_ingot]
 B = Bronze Ingot [default:bronze_ingot]
-M = Mese Crystal [default:mese_crystal]
+M = Mese Crystal [default:mese_crysytal]
 
 Pistol: [shooter:pistol]
 
@@ -52,3 +51,13 @@ Riffle: [shooter:riffle]
 |   | M | B |
 +---+---+---+
 
+Shotgun: [shooter:shotgun]
+
++---+---+---+
+| S |   |   |
++---+---+---+
+|   | S |   |
++---+---+---+
+|   | M | B |
++---+---+---+
+

init.lua

@@ -1,33 +1,52 @@
 dofile(minetest.get_modpath(minetest.get_current_modname()).."/shooter.lua")
 
 minetest.register_tool("shooter:pistol", {
-    description = "Pistol",
+	description = "Pistol",
-    inventory_image = "shooter_pistol.png",
+	inventory_image = "shooter_pistol.png",
 	on_use = function(itemstack, user, pointed_thing)
-		shooter:fire_weapon(user, {
+		shooter:fire_weapon(user, pointed_thing, {
-			range_func = {a=-0.1, b=-1.5, c=100},
+			range = 30,
-			tool_caps = {full_punch_interval=1.0, damage_groups={fleshy=3}},
+			tool_caps = {full_punch_interval=0.5, damage_groups={fleshy=1}},
+			groups = {snappy=3, oddly_breakable_by_hand=3},
 			sound = "shooter_pistol",
+			particle = "default_obsidian.png",
 		})
 		itemstack:add_wear(328) -- 200 Rounds
-		return itemstack
 	end,
 })
 
 minetest.register_tool("shooter:riffle", {
-    description = "Riffle",
+	description = "Riffle",
-    inventory_image = "shooter_riffle.png",
+	inventory_image = "shooter_riffle.png",
 	on_use = function(itemstack, user, pointed_thing)
-		shooter:fire_weapon(user, {
+		shooter:fire_weapon(user, pointed_thing, {
-			range_func = {a=-0.02, b=-0.6, c=100},
+			range = 80,
-			tool_caps = {full_punch_interval=1.0, damage_groups={fleshy=5}},
+			tool_caps = {full_punch_interval=1.0, damage_groups={fleshy=2}},
+			groups = {snappy=3, crumbly=3, choppy=3, oddly_breakable_by_hand=2},
 			sound = "shooter_riffle",
+			particle = "default_gold_block.png",
 		})
 		itemstack:add_wear(656) -- 100 Rounds
 		return itemstack
 	end,
 })
 
+minetest.register_tool("shooter:shotgun", {
+	description = "Shotgun",
+	inventory_image = "shooter_shotgun.png",
+	on_use = function(itemstack, user, pointed_thing)
+		shooter:fire_weapon(user, pointed_thing, {
+			range = 15,
+			tool_caps = {full_punch_interval=1.5, damage_groups={fleshy=4}},
+			groups = {cracky=3, snappy=2, crumbly=2, choppy=2, oddly_breakable_by_hand=1},
+			sound = "shooter_shotgun",
+			particle = "smoke_puff.png",
+		})
+		itemstack:add_wear(1311) -- 50 Rounds
+		return itemstack
+	end,
+})
+
 minetest.register_craft({
 	output = "shooter:pistol",
 	recipe = {
@@ -45,3 +64,12 @@ minetest.register_craft({
 	},
 })
 
+minetest.register_craft({
+	output = "shooter:shotgun",
+	recipe = {
+		{"default:steel_ingot", "", ""},
+		{"", "default:steel_ingot", ""},
+		{"", "default:mese_crystal", "default:bronze_ingot"},
+	},
+})
+

shooter.conf.example

@@ -0,0 +1,13 @@
+-- Simple Shooter config example
+
+-- Global Constants (defaults)
+
+-- Particle texture used when target it hit
+SHOOTER_EXPLOSION_TEXTURE = "shooter_hit.png"
+
+-- Allow entities in multiplayer mode
+SHOOTER_ALLOW_ENTITIES = false
+
+-- Maximum object range, applies only if entities are allowed
+SHOOTER_OBJECT_RANGE = 50
+

shooter.lua

@@ -1,34 +1,145 @@
 shooter = {}
 
-local function in_range(r, x)
+SHOOTER_EXPLOSION_TEXTURE = "shooter_hit.png"
-	local chance = r.a * (x * x) + r.b * x + r.c
+SHOOTER_ALLOW_ENTITIES = true
-	if math.random(100) < chance then
+SHOOTER_OBJECT_RANGE = 50
+
+local modpath = minetest.get_modpath(minetest.get_current_modname())
+local input = io.open(modpath.."/shooter.conf", "r")
+if input then
+	dofile(modpath.."/shooter.conf")
+	input:close()
+	input = nil
+end
+if minetest.is_singleplayer() == true then
+	SHOOTER_ALLOW_ENTITIES = true
+end
+local timer = 0
+local shots = {}
+
+local function spawn_particles(p, v, d, texture)
+	local pos = vector.add(p, vector.multiply(v, {x=d, y=d, z=d}))
+	pos.y = pos.y + 0.75
+	local spread = {x=0.1, y=0.1, z=0.1}
+	minetest.add_particlespawner(15, 0.3,
+		vector.subtract(pos, spread), vector.add(pos, spread),
+		{x=-1, y=1, z=-1}, {x=1, y=2, z=1},
+		{x=-2, y=-2, z=-2}, {x=2, y=-2, z=2},
+		0.1, 0.75, 1, 2, false, texture
+	)
+end
+
+local function is_valid_object(object)
+	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
+				return true
+			end
+		end
+	end
 	return false
 end
 
-function shooter:fire_weapon(user, def)
+function shooter:fire_weapon(user, pointed_thing, def)
+	local name = user:get_player_name()
+	if shots[name] then
+		if timer < shots[name] then
+			return
+		end
+	end
+	shots[name] = timer + def.tool_caps.full_punch_interval
 	minetest.sound_play(def.sound, {object=user})
-	local target = {player=nil, distance=50}
+	local v1 = user:get_look_dir()
 	local p1 = user:getpos()
-	for _,player in ipairs(minetest.get_connected_players()) do
+	minetest.add_particle({x=p1.x, y=p1.y + 1.6, z=p1.z},
-		local p2 = player:getpos()
+		vector.multiply(v1, {x=30, y=30, z=30}),
-		if p1 and p2 then
+		{x=0, y=0, z=0}, 0.5, 0.25,
-			local x = vector.distance(p1, p2)
+		false, def.particle
-			p2.y = p2.y - 0.75
+	)
-			if x > 0 and x < target.distance and x < 50 then
+	if pointed_thing.type == "node" then
-				if in_range(def.range_func, x) == true then
+		local pos = minetest.get_pointed_thing_position(pointed_thing, false)
-					local v1 = user:get_look_dir()
+		local node = minetest.get_node(pos)
+		if not node then
+			return
+		end
+		local item = minetest.registered_items[node.name]
+		if not item.groups then
+			return
+		end
+		for k, v in pairs(def.groups) do
+			local level = item.groups[k] or 0
+			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)
+					end
+				end
+				local tiles = item.tiles
+				if tiles then
+					if tiles[1] then
+						spawn_particles({x=p1.x, y=p1.y + 0.75, z=p1.z},
+						v1, vector.distance(p1, pos), tiles[1])
+					end
+				end
+				break
+			end
+		end
+		return
+	elseif pointed_thing.type == "object" then
+		local object = pointed_thing.ref
+		if is_valid_object(object) == true then
+			object:punch(user, nil, def.tool_caps, v1)
+			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
+	end
+	if def.range > 100 then
+		def.range = 100
+	end
+	local target = {object=nil, distance=100}
+	local objects = {}
+	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 > 50 then
+						yx = 0.001 * (10 - x * 0.1)
+					else
+						yx = 0.000015 * (x * x) - 0.0015 * x + 0.042
+					end
+					local yy = yx * 3
 					local v2 = vector.normalize(vector.direction(p1, p2))
 					local vd = vector.subtract(v1, v2)
-					local yx = 0.00002 * (x * x) - 0.002 * x + 0.05
-					local yy = yx * 3
 					if math.abs(vd.x) < yx and
-					   math.abs(vd.z) < yx and
+					math.abs(vd.z) < yx and
-					   math.abs(vd.y) < yy then
+					math.abs(vd.y) < yy then
 						target = {
-							player = player,
+							object = object,
 							distance = x,
 							direction = v1,
 							pos1 = {x=p1.x, z=p1.z, y=p1.y+1},
@@ -39,9 +150,11 @@ function shooter:fire_weapon(user, def)
 			end
 		end
 	end
-	if target.player then
+	if target.object then
 		if minetest.line_of_sight(target.pos1, target.pos2, 1) then
-			target.player:punch(user, nil, def.tool_caps, target.direction)
+			target.object:punch(user, nil, def.tool_caps, target.direction)
+			spawn_particles(target.pos1, target.direction,
+			target.distance, SHOOTER_EXPLOSION_TEXTURE)
 		end
 	end
 end
@@ -50,3 +163,7 @@ minetest.register_on_joinplayer(function(player)
 	player:hud_set_flags({crosshair = true})
 end)
 
+minetest.register_globalstep(function(dtime)
+	timer = timer + dtime
+end)
+