70 lines
2.0 KiB
GDScript
70 lines
2.0 KiB
GDScript
extends Node2D
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export(Array, Resource) var goo_particles = []
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export(Vector2) var direction
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export(int) var spawn_radius = 32
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export(int) var spawn_rate = 1
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export(int) var despawn_radius = 250
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export(float) var movement_speed = 10
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var goo_shader = preload('res://images/goo/goo.shader')
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var delta_sum = 0
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var time = 0
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func _ready():
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for particle in goo_particles:
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particle.load_textures()
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func emit():
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var particle = goo_particles[rand_range(0, goo_particles.size())] as GooParticle
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var instance = Particle.new()
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instance.particle = particle
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instance.material = ShaderMaterial.new()
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instance.material.shader = goo_shader
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instance.material.set_shader_param('particles_anim_h_frames', particle.columns)
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instance.material.set_shader_param('particles_anim_v_frames', particle.rows)
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instance.material.set_shader_param('particles_anim_loop', true)
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instance.material.set_shader_param('frame', 0)
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instance.texture = particle.texture
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instance.normal_map = particle.normal_map
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instance.shader_frame = 0
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instance.position = Vector2(rand_range(0, spawn_radius), rand_range(0, spawn_radius))
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instance.initial_y = instance.position.y
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instance.initial_time = time
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add_child(instance)
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func _process(delta):
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delta_sum += delta
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time += delta
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for child in get_children():
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child.delta_sum += delta
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while child.delta_sum >= 1.0 / child.particle.framerate:
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child.delta_sum -= 1.0 / child.particle.framerate
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child.shader_frame += 1
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if child.shader_frame >= child.particle.frame_count:
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child.shader_frame = 0
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child.material.set_shader_param('frame', child.shader_frame)
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child.position += direction * delta * movement_speed
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child.position.y = child.initial_y + sin(time - child.initial_time) * 3
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while delta_sum >= spawn_rate:
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delta_sum -= spawn_rate
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emit()
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for child in get_children():
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if child.position.length() > despawn_radius:
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child.queue_free()
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class Particle:
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extends Sprite
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var shader_frame = 0
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var particle : GooParticle
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var delta_sum : float = 0
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var initial_y : int
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var initial_time : float
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