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57 lines
1.7 KiB
57 lines
1.7 KiB
6 months ago
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class_name DialogicBackgroundTransition
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extends Node
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## Helper
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var this_folder : String = get_script().resource_path.get_base_dir()
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## Set before _fade() is called, will be the root node of the previous bg scene.
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var prev_scene: Node
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## Set before _fade() is called, will be the viewport texture of the previous bg scene.
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var prev_texture: ViewportTexture
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## Set before _fade() is called, will be the root node of the upcoming bg scene.
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var next_scene: Node
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## Set before _fade() is called, will be the viewport texture of the upcoming bg scene.
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var next_texture: ViewportTexture
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## Set before _fade() is called, will be the requested time for the fade
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var time: float
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## Set before _fade() is called, will be the background holder (TextureRect)
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var bg_holder: DialogicNode_BackgroundHolder
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signal transition_finished
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## To be overridden by transitions
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func _fade() -> void:
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pass
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func set_shader(path_to_shader:String=DialogicUtil.get_module_path('Background').path_join("Transitions/default_transition_shader.gdshader")) -> ShaderMaterial:
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if bg_holder:
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if path_to_shader.is_empty():
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bg_holder.material = null
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bg_holder.color = Color.TRANSPARENT
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return null
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bg_holder.material = ShaderMaterial.new()
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bg_holder.material.shader = load(path_to_shader)
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return bg_holder.material
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return null
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func tween_shader_progress(progress_parameter:="progress") -> PropertyTweener:
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if !bg_holder:
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return
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if !bg_holder.material is ShaderMaterial:
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return
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bg_holder.material.set_shader_parameter("progress", 0.0)
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var tween := create_tween()
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var tweener := tween.tween_property(bg_holder, "material:shader_parameter/progress", 1.0, time).from(0.0)
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tween.tween_callback(emit_signal.bind('transition_finished'))
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return tweener
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