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Code Issues 12 Releases Activity

eel waving animation capability

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Haze Weathers 2023-07-13 11:18:20 -04:00
parent a8906f82f0
commit 5a73af8887
1 changed files with 23 additions and 0 deletions
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23
objects/enemy/eel.gd
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@ -1,5 +1,6 @@
extends "res://objects/enemy/enemy.gd" extends "res://objects/enemy/enemy.gd"
# distance between segments # distance between segments
const SEGMENT_LENGTH: float = 4.0 const SEGMENT_LENGTH: float = 4.0
@ -7,12 +8,17 @@ const SEGMENT_LENGTH: float = 4.0
export var segments: int = 8 export var segments: int = 8
# speed eel travels # speed eel travels
export var speed: float = 32.0 export var speed: float = 32.0
# how far eel travels along path for complete wave
export var wave_length: float = 0.0
# intensity in pixels of eel wave animation
export var wave_amplitude: float = 0.0
var _segments: Array var _segments: Array
onready var head: PathFollow2D = $Head onready var head: PathFollow2D = $Head
onready var tail: PathFollow2D = $Tail onready var tail: PathFollow2D = $Tail
func _ready() -> void: func _ready() -> void:
# get nodes # get nodes
var first_segment: PathFollow2D = $Segment var first_segment: PathFollow2D = $Segment
@ -36,11 +42,15 @@ func _ready() -> void:
first_segment.queue_free() first_segment.queue_free()
first_segment_shape.queue_free() first_segment_shape.queue_free()
func _physics_process(delta: float) -> void: func _physics_process(delta: float) -> void:
# move along path # move along path
head.offset += speed * delta head.offset += speed * delta
# position segments accordingly # position segments accordingly
_offset_segments() _offset_segments()
# waving animation
_wave_segments()
func _offset_segments() -> void: func _offset_segments() -> void:
# put tail at end # put tail at end
@ -50,6 +60,19 @@ func _offset_segments() -> void:
# set segment position based on index and length # set segment position based on index and length
_segments[i].offset = head.offset - SEGMENT_LENGTH * float(i + 1) _segments[i].offset = head.offset - SEGMENT_LENGTH * float(i + 1)
func _wave_segments() -> void:
# save the effort of looping if nothing will come of it
if wave_length == 0.0 and wave_amplitude == 0.0:
return
for child in get_children():
# only affect childent that are pathfollows
var segment = child as PathFollow2D
if segment:
# multiply by tau to use pixels as unit
segment.v_offset = sin(segment.offset * TAU / wave_length) * wave_amplitude
func die() -> void: func die() -> void:
# instance death particles for every segment # instance death particles for every segment
for segment in _segments: for segment in _segments: