[18w05a]新命令/bossbar 自定义boss血条实现指向效果 [已稳定] - Minecraft(我的世界)中文论坛

# Initialization
# Create bossbar
bossbar create bossbar:target "TARGET"
# Player's location (X,Z)
scoreboard objectives add pos_p_x dummy
scoreboard objectives add pos_p_z dummy
# Target's location (X,Z)
scoreboard objectives add pos_t_x dummy
scoreboard objectives add pos_t_z dummy
# Player-facing vector (X,Z)
scoreboard objectives add vec_yw_x dummy
scoreboard objectives add vec_yw_z dummy
# Target-to-player vector (X,Z)
scoreboard objectives add vec_nvt_x dummy
scoreboard objectives add vec_nvt_z dummy
# Current dot product
scoreboard objectives add int_dp_vt dummy
# Max dot product
scoreboard objectives add int_dp_mx dummy
# Caclation output flag (to current or to max)
scoreboard objectives add con_mx_bool dummy
# Temp score when calculating abs
scoreboard objectives add tmp_abs_swp dummy

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bossbar_navigation.mcfunction [TICK]

# Calculation
# Set storage flag(to max or current)
# Max
scoreboard players set @a con_mx_bool 1
# Calculate
execute as @a at @s facing entity @e[tag=target,sort=nearest,limit=1] eyes run function bossbar:bossbar_dotproduct_calculation
# Store max
execute as @a store result bossbar bossbar:target max run scoreboard players get @s int_dp_mx
# Current
scoreboard players set @a con_mx_bool 0
# Calculate
execute as @a at @s run function bossbar:bossbar_dotproduct_calculation
# Set display
# Current equals or is greater than 0
execute as @a[scores={int_dp_vt=0..}] run function bossbar:bossbar_positive_display
# Current is less than 0
execute as @a[scores={int_dp_vt=..-1}] run function bossbar:bossbar_minus_display
# Glow the target so that player can identify them easily
execute as @a at @s run effect give @e[tag=target,sort=nearest,limit=1] minecraft:glowing 1

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bossbar_dotproduct_calculation.mcfunction

# Reset Scoreboards
# Current case
execute if entity @s[scores={con_mx_bool=0}] run scoreboard players set @s int_dp_vt 0
# Max case
execute if entity @s[scores={con_mx_bool=1}] run scoreboard players set @s int_dp_mx 0
# Get player's location (X,Z)
execute store result score @s pos_p_x run data get entity @s Pos[0] 100
execute store result score @s pos_p_z run data get entity @s Pos[2] 100
# Get player's facing vector(have not been normalized)
# Summon length-marker
execute if entity @s[scores={con_mx_bool=0}] rotated ~ 0 run summon minecraft:area_effect_cloud ^ ^ ^1 {CustomName:"["p_dir"]"}
# Get length-marker's location
execute store result score @s pos_t_x run data get entity @e[name=p_dir,sort=nearest,limit=1] Pos[0] 100
execute store result score @s pos_t_z run data get entity @e[name=p_dir,sort=nearest,limit=1] Pos[2] 100
# Calculate the vector
scoreboard players operation @s vec_yw_x = @s pos_t_x
scoreboard players operation @s vec_yw_z = @s pos_t_z
execute run scoreboard players operation @s vec_yw_x -= @s pos_p_x
execute run scoreboard players operation @s vec_yw_z -= @s pos_p_z
# Get target-to-player vector
# Get target's location
# Summon plainizer(X,Z)
execute run summon minecraft:area_effect_cloud ~ ~ ~ {CustomName:"["plainizer"]"}
# Correct the plainizer's location(Tx,Py,Tz)
execute store result entity @e[name=plainizer,sort=nearest,limit=1] Pos[0] double 1 run data get entity @e[tag=target,sort=nearest,limit=1] Pos[0]
execute store result entity @e[name=plainizer,sort=nearest,limit=1] Pos[1] double 1 run data get entity @s Pos[1]
execute store result entity @e[name=plainizer,sort=nearest,limit=1] Pos[2] double 1 run data get entity @e[tag=target,sort=nearest,limit=1] Pos[2]
# Summon length-marker
execute facing entity @e[name=plainizer,sort=nearest,limit=1] eyes run summon minecraft:area_effect_cloud ^ ^ ^1 {CustomName:"["tp_dir"]"}
# Get length-marker's location
execute store result score @s pos_t_x run data get entity @e[name=tp_dir,sort=nearest,limit=1] Pos[0] 100
execute store result score @s pos_t_z run data get entity @e[name=tp_dir,sort=nearest,limit=1] Pos[2] 100
# Calculate the vector
scoreboard players operation @s vec_nvt_x = @s pos_t_x
scoreboard players operation @s vec_nvt_z = @s pos_t_z
execute run scoreboard players operation @s vec_nvt_x -= @s pos_p_x
execute run scoreboard players operation @s vec_nvt_z -= @s pos_p_z
# Max case
execute if entity @s[scores={con_mx_bool=1}] run scoreboard players operation @s vec_yw_x = @s vec_nvt_x
execute if entity @s[scores={con_mx_bool=1}] run scoreboard players operation @s vec_yw_z = @s vec_nvt_z
# Dot Product
# Multiply the x and z of direction-vector to the x and z of target-to-player vector
execute run scoreboard players operation @s vec_nvt_x *= @s vec_yw_x
execute run scoreboard players operation @s vec_nvt_z *= @s vec_yw_z
# Add the result to output-scoreboards
# Current case
execute if entity @s[scores={con_mx_bool=0}] run scoreboard players operation @s int_dp_vt += @s vec_nvt_x
execute if entity @s[scores={con_mx_bool=0}] run scoreboard players operation @s int_dp_vt += @s vec_nvt_z
# Max case
execute if entity @s[scores={con_mx_bool=1}] run scoreboard players operation @s int_dp_mx += @s vec_nvt_x
execute if entity @s[scores={con_mx_bool=1}] run scoreboard players operation @s int_dp_mx += @s vec_nvt_z

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