README.md

Godot Scene Manager

Simple scene manager with simple transition effects using RPG Maker greyscale images. Doesn't do async loading at all, but that's fine for small games that just want a little pizzaz to their visuals. Just drop the file into your project and add it to your Autoloads. Then start doing SceneManager.change_scene('res://myscene.tscn') instead of get_tree().change_scene('res://myscene.tscn') and you'll be good to go.

SceneManager.tscn

[gd_scene load_steps=5 format=2]

[sub_resource type="GDScript" id=1]

script/source = "extends Node

var next_scene = null
var is_ready setget _finish_transition

onready var anim = $Fader/AnimationPlayer

func _finish_transition(value):
	if value:
		is_ready = true
		anim.play(\"Fade\")
		$Fader/Label.visible = false
		get_tree().paused = false
	
func transition_menu(anim_name):
	var tree = get_tree()
	tree.change_scene(next_scene)
	anim.disconnect(\"animation_finished\", self, \"transition_menu\")
	if is_ready:
		self.is_ready = true
	else:
		$Fader/Label.visible = true
	next_scene = null
	
func change_scene(goto, hold=false):
	\"\"\"
	Changes scene with a transition.
	You can hold the fade back in transition if desired until
	the next scene is in a state that is considered \"ready\"
	\"\"\"
	next_scene = goto
	anim.play_backwards(\"Fade\")
	anim.connect(\"animation_finished\", self, \"transition_menu\")
	is_ready = not hold
	get_tree().paused = true
"

[sub_resource type="Shader" id=2]

code = "shader_type canvas_item;
render_mode blend_mix;

uniform float transition: hint_range(0, 1);

float val(vec3 color) {
	return max(max(color.r, color.g), color.b);
}

void fragment() {
	vec4 sample = texture(TEXTURE, UV.xy);
	if (val(sample.rgb) < transition) {
		COLOR = vec4(0,0,0,0)
	} else {
		COLOR = vec4(0,0,0,1);
	}
}"
_sections_unfolded = [ "Resource" ]

[sub_resource type="ShaderMaterial" id=3]

render_priority = 0
shader = SubResource( 2 )
shader_param/transition = 0.0
_sections_unfolded = [ "shader_param" ]

[sub_resource type="Animation" id=4]

length = 0.8
loop = false
step = 0.1
tracks/0/type = "value"
tracks/0/path = NodePath(".:material:shader_param/transition")
tracks/0/interp = 1
tracks/0/loop_wrap = true
tracks/0/imported = false
tracks/0/enabled = true
tracks/0/keys = {
"times": PoolRealArray( 0, 0.7 ),
"transitions": PoolRealArray( 1, 1 ),
"update": 0,
"values": [ 0.0, 1.0 ]
}
tracks/1/type = "value"
tracks/1/path = NodePath(".:visible")
tracks/1/interp = 1
tracks/1/loop_wrap = true
tracks/1/imported = false
tracks/1/enabled = true
tracks/1/keys = {
"times": PoolRealArray( 0, 0.7, 0.8 ),
"transitions": PoolRealArray( 1, 1, 1 ),
"update": 1,
"values": [ true, true, false ]
}

[node name="SceneManager" type="CanvasLayer" index="0"]

pause_mode = 2
layer = 128
offset = Vector2( 0, 0 )
rotation = 0.0
scale = Vector2( 1, 1 )
transform = Transform2D( 1, 0, 0, 1, 0, 0 )
script = SubResource( 1 )

[node name="Fader" type="TextureRect" parent="." index="0"]

material = SubResource( 3 )
anchor_left = 0.0
anchor_top = 0.0
anchor_right = 1.0
anchor_bottom = 1.0
rect_pivot_offset = Vector2( 0, 0 )
rect_clip_content = false
mouse_filter = 2
mouse_default_cursor_shape = 0
size_flags_horizontal = 1
size_flags_vertical = 1
expand = true
stretch_mode = 0

[node name="Label" type="Label" parent="Fader" index="0"]

visible = false
anchor_left = 0.0
anchor_top = 0.0
anchor_right = 0.0
anchor_bottom = 0.0
margin_left = 236.0
margin_top = 221.0
margin_right = 316.0
margin_bottom = 235.0
rect_pivot_offset = Vector2( 0, 0 )
rect_clip_content = false
mouse_filter = 2
mouse_default_cursor_shape = 0
size_flags_horizontal = 1
size_flags_vertical = 4
text = "Loading..."
percent_visible = 1.0
lines_skipped = 0
max_lines_visible = -1

[node name="AnimationPlayer" type="AnimationPlayer" parent="Fader" index="1"]

root_node = NodePath("..")
autoplay = "Fade"
playback_process_mode = 1
playback_default_blend_time = 0.0
playback_speed = 1.0
anims/Fade = SubResource( 4 )
blend_times = [  ]