Godot特效：刀光（三）着色器及代码部分 方法一

网上很多Unity版的刀光效果教程，都是基于粒子系统实现的，我这个Godot版使用Shader结合Tween实现的

节点结构

着色器

shader_type spatial;
render_mode unshaded,cull_disabled;

uniform float offset = 0.0;
uniform sampler2D tex : hint_albedo;

void vertex(){
	UV += vec2(offset,0); 
}

void fragment(){
	vec4 c = texture(tex,UV).rgba;
	ALBEDO = c.rgb;
	ALPHA = c.a;
}

Player代码

Player就是模拟一个角色

extends Spatial

onready var vfx_slash = $"vfx_slash"


func _input(e):
	if e is InputEventKey and e.pressed and not e.echo: 
		match e.scancode:
			KEY_1:
				vfx_slash.play()

vfx_mesh代码

extends MeshInstance

#var material:Material
onready var tween : Tween
var percent : float = 0.0
export var duration :float = 0.3

func _ready():
	tween = Tween.new()
	add_child(tween)
	hide()

func play():
	show()
	tween.interpolate_property(self,"percent",0.0,0.5,duration,Tween.TRANS_LINEAR,Tween.EASE_IN)
	tween.connect("tween_all_completed",self,"tween_all_completed")
	tween.start()
	

func _process(delta):
	get_surface_material(0).set_shader_param("offset",percent)


func tween_all_completed():
	hide()

最终效果