Alternative Background Transition Implementation (#1952)

* create first pass transition resource

* added rough editor for transitions

* background event should have access to transitions

* fixed spelling mistake

* fixed layout i broke earlier

* in functioning state

* allow for custom defaults for transitions

* make sure that texture stays centered when scaled

* Simplify background transition system

* Add special_resources system for PortraitAnimations and Transitions

Also tries but fails to implement some transitions.

* Fix transitions, add new transition

* Some more default transitions

* Make sure "is DialogicBackground" check is done before required

---------

Co-authored-by: Pheubel <[email protected]>

Author: Jowan-Spooner

addons/dialogic/Modules/Background/default_background.gd renamed to addons/dialogic/Modules/Background/DefaultBackgroundScene/default_background.gd

@@ -25,7 +25,3 @@ func _update_background(argument:String, time:float) -> void:
 	else:
 		image_node.texture = null
 		color_node.color = Color.from_string(argument, Color.TRANSPARENT)
-
-
-func _should_do_background_update(argument:String) -> bool:
-	return false

addons/dialogic/Modules/Background/default_background.tscn renamed to addons/dialogic/Modules/Background/DefaultBackgroundScene/default_background.tscn

@@ -1,6 +1,6 @@
 [gd_scene load_steps=2 format=3 uid="uid://cl6g6ymkhjven"]
 
-[ext_resource type="Script" path="res://addons/dialogic/Modules/Background/default_background.gd" id="1_nkdrp"]
+[ext_resource type="Script" path="res://addons/dialogic/Modules/Background/DefaultBackgroundScene/default_background.gd" id="1_nkdrp"]
 
 [node name="DefaultBackground" type="Control"]
 layout_mode = 3

addons/dialogic/Modules/Background/Transitions/Defaults/push_down.gd

@@ -0,0 +1,7 @@
+extends "res://addons/dialogic/Modules/Background/Transitions/simple_push_transitions.gd"
+
+func _fade() -> void:
+	var shader := setup_push_shader()
+	shader.set_shader_parameter('final_offset', Vector2.DOWN)
+	tween_shader_progress().set_trans(Tween.TRANS_SINE).set_ease(Tween.EASE_IN_OUT)
+

addons/dialogic/Modules/Background/Transitions/Defaults/push_left.gd

@@ -0,0 +1,7 @@
+extends "res://addons/dialogic/Modules/Background/Transitions/simple_push_transitions.gd"
+
+func _fade() -> void:
+	var shader := setup_push_shader()
+	shader.set_shader_parameter('final_offset', Vector2.LEFT)
+	tween_shader_progress().set_trans(Tween.TRANS_SINE).set_ease(Tween.EASE_IN_OUT)
+

addons/dialogic/Modules/Background/Transitions/Defaults/push_right.gd

@@ -0,0 +1,7 @@
+extends "res://addons/dialogic/Modules/Background/Transitions/simple_push_transitions.gd"
+
+func _fade() -> void:
+	var shader := setup_push_shader()
+	shader.set_shader_parameter('final_offset', Vector2.RIGHT)
+	tween_shader_progress().set_trans(Tween.TRANS_SINE).set_ease(Tween.EASE_IN_OUT)
+

addons/dialogic/Modules/Background/Transitions/Defaults/push_up.gd

@@ -0,0 +1,7 @@
+extends "res://addons/dialogic/Modules/Background/Transitions/simple_push_transitions.gd"
+
+func _fade() -> void:
+	var shader := setup_push_shader()
+	shader.set_shader_parameter('final_offset', Vector2.UP)
+	tween_shader_progress().set_trans(Tween.TRANS_SINE).set_ease(Tween.EASE_IN_OUT)
+

addons/dialogic/Modules/Background/Transitions/Defaults/simple_fade.gd

@@ -0,0 +1,13 @@
+extends DialogicBackgroundTransition
+
+
+func _fade() -> void:
+	var shader := set_shader()
+	shader.set_shader_parameter("wipe_texture", load(this_folder.path_join("simple_fade.tres")))
+
+	shader.set_shader_parameter("feather", 1)
+
+	shader.set_shader_parameter("previous_background", prev_texture)
+	shader.set_shader_parameter("next_background", next_texture)
+
+	tween_shader_progress()

addons/dialogic/Modules/Background/Transitions/Defaults/simple_fade.tres

@@ -0,0 +1,8 @@
+[gd_resource type="GradientTexture2D" load_steps=2 format=3 uid="uid://qak7mr560k0i"]
+
+[sub_resource type="Gradient" id="Gradient_skd6w"]
+offsets = PackedFloat32Array(1)
+colors = PackedColorArray(0.423651, 0.423651, 0.423651, 1)
+
+[resource]
+gradient = SubResource("Gradient_skd6w")

addons/dialogic/Modules/Background/Transitions/Defaults/swipe_diagonal_up_left.gd

@@ -0,0 +1,8 @@
+extends "res://addons/dialogic/Modules/Background/Transitions/simple_swipe_transitions.gd"
+
+func _fade() -> void:
+	var shader := setup_swipe_shader()
+	var texture :GradientTexture2D = shader.get_shader_parameter('wipe_texture')
+	texture.fill_from = Vector2.DOWN
+	texture.fill_to = Vector2.RIGHT
+	tween_shader_progress()

addons/dialogic/Modules/Background/Transitions/Defaults/swipe_left_to_right.gd

@@ -0,0 +1,10 @@
+extends "res://addons/dialogic/Modules/Background/Transitions/simple_swipe_transitions.gd"
+
+func _fade() -> void:
+	var shader := setup_swipe_shader()
+	var texture :GradientTexture2D = shader.get_shader_parameter('wipe_texture')
+
+	texture.fill_from = Vector2.ZERO
+	texture.fill_to = Vector2.RIGHT
+
+	tween_shader_progress()