Merge pull request 'Finish PVP Combat Parity with the rest + PVP Tweaks' (#4078) from Eliy21/MineClone2:combat_fixes into master

Reviewed-on: MineClone2/MineClone2#4078
Reviewed-by: the-real-herowl <the-real-herowl@noreply.git.minetest.land>

mods/ITEMS/mcl_bows/bow.lua

@@ -57,7 +57,9 @@ function mcl_bows.shoot_arrow(arrow_item, pos, dir, yaw, shooter, power, damage,
 			damage = damage + (enchantments.power + 1) / 4
 		end
 		if enchantments.punch then
-			knockback = enchantments.punch * 21
+			knockback = enchantments.punch * 24
+		else
+			knockback = 4.875
 		end
 		if enchantments.flame then
 			mcl_burning.set_on_fire(obj, math.huge)

mods/ITEMS/mcl_bows/crossbow.lua

@@ -48,7 +48,7 @@ function mcl_bows_s.shoot_arrow_crossbow(arrow_item, pos, dir, yaw, shooter, pow
 	if damage == nil then
 		damage = 3
 	end
-	local knockback
+	local knockback = 4.875
 	if crossbow_stack then
 		local enchantments = mcl_enchanting.get_enchantments(crossbow_stack)
 		if enchantments.piercing then

mods/ITEMS/mcl_enchanting/enchantments.lua

@@ -133,10 +133,14 @@ minetest.register_on_punchplayer(function(player, hitter, time_from_last_punch,
 		if wielditem then
 			local fire_aspect_level = mcl_enchanting.get_enchantment(wielditem, "fire_aspect")
 			if fire_aspect_level > 0 then
+				local player_pos = player:get_pos()
+				local hitter_pos = hitter:get_pos()
+				if vector.distance(hitter_pos, player_pos) <= 3 then
 					mcl_burning.set_on_fire(player, fire_aspect_level * 4)
 				end
 			end
 		end
+	end
 end)
 
 mcl_enchanting.enchantments.flame = {
@@ -276,15 +280,65 @@ function minetest.calculate_knockback(player, hitter, time_from_last_punch, tool
 	if hitter then
 		luaentity = hitter:get_luaentity()
 	end
-	if hitter and hitter:is_player() then
+	if hitter and hitter:is_player() and distance <= 3 then
 		local wielditem = hitter:get_wielded_item()
-		knockback = knockback + 5 * mcl_enchanting.get_enchantment(wielditem, "knockback")
+		--knockback = knockback + 3 * mcl_enchanting.get_enchantment(wielditem, "knockback")
+		local enchant = mcl_enchanting.get_enchantment(wielditem, "knockback")
+		knockback = knockback + 3.22 * enchant
+		-- add vertical lift to knockback
+		local v = player:get_velocity()
+		local added_v = 0
+		local invul = player:get_meta():get_int("mcl_damage:invulnerable")
+		if v and v.y <= 0.01 and v.y >= -0.01 and invul == 0 then
+			local regular_v = 6.4
+			local enchant_v = 7
+			regular_v = regular_v * math.abs(dir.y - 1)
+			enchant_v = enchant_v * math.abs(dir.y - 1)
+			if enchant == 0 then
+				player:add_velocity({x = 0, y = regular_v, z = 0})
+				added_v = regular_v
+			else
+				player:add_velocity({x = 0, y = enchant_v, z = 0})
+				added_v = enchant_v
+			end
+			-- add minimum knockback
+			if knockback <= 1.5 then
+				knockback = knockback + 4.875
+			elseif knockback <= 6.19 then
+				knockback = knockback + 0.609375
+			end
+		end
+		-- counteract forward velocity when hit
+		local self_dir_dot = (v.x * dir.x) + (v.z * dir.z)
+		if self_dir_dot < 0 then
+			player:add_velocity({x = v.x * -1, y = 0, z = v.z * -1})
+		end
 		-- add player velocity to knockback
+		local h_name = hitter:get_player_name()
 		local hv = hitter:get_velocity()
 		local dir_dot = (hv.x * dir.x) + (hv.z * dir.z)
-		if dir_dot > 0 then
-			knockback = knockback + dir_dot * 2
+		local hitter_mag = math.sqrt((hv.x * hv.x) + (hv.z * hv.z))
+		if dir_dot > 0 and mcl_sprint.is_sprinting(h_name) then
+			knockback = knockback + hitter_mag * 0.6875
+		elseif dir_dot > 0 then
+			knockback = knockback + hitter_mag * 0.515625
 		end
+		-- reduce floatiness
+		minetest.after(0.25, function()
+			player:add_velocity({x = 0, y = (v.y + added_v) * -0.375, z = 0})
+		end)
+		-- reduce knockback when moving towards hitter while attacking
+		local self_dir_dot = (v.x * dir.x) + (v.z * dir.z)
+		local control = player:get_player_control()
+		if self_dir_dot < -4.3 and control.up and control.LMB then
+			knockback = knockback * 0.6
+		end
+		-- remove knockback if invulnerable
+		if invul > 0 then
+			knockback = 0
+		end
+	elseif hitter and hitter:is_player() and distance > 3 then
+		knockback = 0
 	elseif luaentity and luaentity._knockback then
 		local kb = knockback + luaentity._knockback / 4
 		local punch_dir = dir

mods/PLAYER/mcl_player/init.lua

@@ -228,6 +228,11 @@ minetest.register_globalstep(function(dtime)
 			-- Apply animations based on what the player is doing
 			if player:get_hp() == 0 then
 				player_set_animation(player, "die")
+			elseif player:get_meta():get_int("mcl_damage:damage_animation") > 0 then
+				player_set_animation(player, "walk", animation_speed_mod)
+				minetest.after(0.5, function()
+					player:get_meta():set_int("mcl_damage:damage_animation", 0)
+				end)
 			elseif mcl_playerplus.elytra[player] and mcl_playerplus.elytra[player].active then
 				player_set_animation(player, "stand")
 			elseif walking and velocity.x > 0.35

mods/PLAYER/mcl_playerplus/init.lua

@@ -663,6 +663,8 @@ minetest.register_on_joinplayer(function(player)
 		lastPos = nil,
 		swimDistance = 0,
 		jump_cooldown = -1,	-- Cooldown timer for jumping, we need this to prevent the jump exhaustion to increase rapidly
+		last_damage = 0,
+		invul_timestamp = 0,
 	}
 	mcl_playerplus.elytra[player] = {active = false, rocketing = 0, speed = 0}
 
@@ -727,19 +729,43 @@ mcl_damage.register_modifier(function(obj, damage, reason)
 	end
 end, -200)
 
--- damage invulnerability
-mcl_damage.register_modifier(function(obj, damage, reason)
-	local invul = obj:get_meta():get_int("mcl_damage:invulnerable")
-	if invul > 0 then
-		return 0
-	else
-		obj:get_meta():set_int("mcl_damage:invulnerable", 1)
-		minetest.after(0.5, function()
-			obj:get_meta():set_int("mcl_damage:invulnerable", 0)
-		end)
+minetest.register_on_punchplayer(function(player, hitter, time_from_last_punch, tool_capabilities, dir, damage)
+	-- attack reach limit
+	if hitter and hitter:is_player() then
+		local player_pos = player:get_pos()
+		local hitter_pos = hitter:get_pos()
+		if vector.distance(player_pos, hitter_pos) > 3 then
+			damage = 0
 			return damage
 		end
-end, -1000)
+	end
+	-- damage invulnerability
+	if hitter then
+		local name = player:get_player_name()
+		local time_now = minetest.get_us_time()
+		local invul_timestamp = mcl_playerplus_internal[name].invul_timestamp
+		local time_diff = time_now - invul_timestamp
+		-- check for invulnerability time in microseconds (0.5 second)
+		if time_diff <= 500000 and time_diff >= 0 then
+			player:get_meta():set_int("mcl_damage:invulnerable", 1)
+			minetest.after(0.5, function()
+				player:get_meta():set_int("mcl_damage:invulnerable", 0)
+			end)
+			damage = damage - mcl_playerplus_internal[name].last_damage
+			if damage < 0 then
+				damage = 0
+			end
+			return damage
+		else
+			mcl_playerplus_internal[name].last_damage = damage
+			mcl_playerplus_internal[name].invul_timestamp = time_now
+			player:get_meta():set_int("mcl_damage:damage_animation", 1)
+			minetest.after(0.5, function()
+				player:get_meta():set_int("mcl_damage:damage_animation", 0)
+			end)
+		end
+	end
+end)
 
 minetest.register_on_respawnplayer(function(player)
 	local pos = player:get_pos()