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41 lines
1020 B
GDScript
41 lines
1020 B
GDScript
extends Decal
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class_name ParticleDecal
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@export var lifetime: float = 1
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@export var gradient: Gradient
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@export var scale_curve: Curve
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@export var particle_rotate: int
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@export var size_random: float #0-1 0为不随机 1为随机0~2倍
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var lifetime_now: float
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var size_scale: float
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func on_ready() -> void:
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var scale_sample: float = scale_curve.sample(0)
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size_random = clamp(size_random, 0, 1)
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size_scale = randf_range(1-size_random, 1+size_random)
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scale = Vector3(scale_sample, 1, scale_sample) * size_scale
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func on_process(delta: float) -> void:
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lifetime_now += delta
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var rate: float = lifetime_now / lifetime
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if rate > 1:
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return
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#色带
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if gradient:
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modulate = gradient.sample(rate)
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else:
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modulate.a = 1 - rate
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#缩放曲线
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if scale_curve:
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var scale_sample: float = scale_curve.sample(rate)
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scale = Vector3(scale_sample, 1, scale_sample) * size_scale
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#旋转
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rotation_degrees.y = particle_rotate * rate
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return
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