niveau/transitions: shader de transition

Entre les niveaux et à la mort il y a maintenant un fondu au noir qui se
met en place pour éviter d'avoir la gerbe sur les mouvements de caméra.
la physique est en pause pendant la transition.

HUD/fart_gauge.gd

@@ -24,6 +24,7 @@ func dash_fart() -> bool:
 func reset():
     animationPlayer.play("RESET")
     loaded = false
+    loading = false
 
 func _on_animation_player_animation_finished(anim_name: StringName) -> void:
     if anim_name == "reload":

HUD/hud.gd

@@ -4,7 +4,11 @@ class_name HUD extends CanvasLayer
 @onready var gauge2 := $FartGauge2 as FartGauge
 @onready var gauge3 := $FartGauge3 as FartGauge
 
+@onready var shader := $TransitionShader
+
 signal fart_reloaded()
+signal screen_is_black()
+signal screen_is_ready()
 
 var cheese_number = 0
 var gauges = []
@@ -15,7 +19,6 @@ func _ready() -> void:
     gauge3.connect("reload_done", cheese_loaded)
     gauges = [gauge1, gauge2, gauge3]
 
-
 func reset():
     cheese_number = 0
     for gauge in gauges:
@@ -34,3 +37,17 @@ func dash_fart():
 
 func cheese_loaded():
     fart_reloaded.emit()
+
+func begin_scene_transition():
+    print("start scene transition")
+    shader.fade_out()
+
+func end_scene_transition():
+    print("end scene transition")
+    shader.fade_in()
+
+func _on_transition_shader_fade_in_done() -> void:
+    screen_is_ready.emit()
+
+func _on_transition_shader_fade_out_done() -> void:
+    screen_is_black.emit()

HUD/hud.tscn

@@ -1,8 +1,11 @@
-[gd_scene load_steps=2 format=3 uid="uid://dvlb4thqhqke"]
+[gd_scene load_steps=4 format=3 uid="uid://dvlb4thqhqke"]
 
 [ext_resource type="PackedScene" uid="uid://dsgt6b1bqi6ui" path="res://HUD/fart_gauge.tscn" id="1_4e2i3"]
+[ext_resource type="Script" path="res://HUD/hud.gd" id="1_e1sc7"]
+[ext_resource type="PackedScene" uid="uid://17macg0q4k8l" path="res://shaders/transition_shader.tscn" id="2_gh8iu"]
 
 [node name="HUD" type="CanvasLayer"]
+script = ExtResource("1_e1sc7")
 
 [node name="FartGauge3" parent="." instance=ExtResource("1_4e2i3")]
 position = Vector2(242, 6)
@@ -18,3 +21,10 @@ scale = Vector2(0.7, 0.7)
 position = Vector2(51, 6)
 rotation = -1.5708
 scale = Vector2(0.7, 0.7)
+
+[node name="TransitionShader" parent="." instance=ExtResource("2_gh8iu")]
+offset_right = 0.0
+offset_bottom = 0.0
+
+[connection signal="fade_in_done" from="TransitionShader" to="." method="_on_transition_shader_fade_in_done"]
+[connection signal="fade_out_done" from="TransitionShader" to="." method="_on_transition_shader_fade_out_done"]

game.gd

@@ -13,6 +13,9 @@ var last_spawn_point = null
 
 var princesse : Princess = null
 
+var goto_destination
+var goto_spawn_point
+
 # Called when the node enters the scene tree for the first time.
 func _ready() -> void:
     go_to(scene_name, null)
@@ -25,11 +28,20 @@ func enter_door(destination : String, other_side_position : Vector2):
     call_deferred("go_to", destination, other_side_position)
 
 func go_to(destination : String, spawn_point):
+    goto_destination = destination
+    goto_spawn_point = spawn_point
+    hud.begin_scene_transition()
+
+func _on_hud_screen_is_black() -> void:
+    var destination = goto_destination
+    var spawn_point = goto_spawn_point
+
     var old_princesse :Princess = null
     if current_scence:
         old_princesse = current_scence.find_child("Princesse")
         old_princesse.disconnect("cheese_collected", hud_load_cheese)
         old_princesse.disconnect("dash_fart", hud_unload_cheese)
+        #old_princesse.disconnect("princess_is_dead", princess_death)
         remove_child(current_scence)
 
     if destination == "level_1":
@@ -54,6 +66,9 @@ func go_to(destination : String, spawn_point):
             princesse.copy_from(old_princesse)
     princesse.connect("cheese_collected", hud_load_cheese)
     princesse.connect("dash_fart", hud_unload_cheese)
+    #princesse.connect("princess_is_dead", princess_death)
+    hud.end_scene_transition()
+
 
 # vient de la princesse quand elle a ramassé un fromage
 func hud_load_cheese():
@@ -67,3 +82,6 @@ func hud_unload_cheese():
 # quand le fromage est chargé, le jeu le signale à la princesse
 func _on_hud_fart_reloaded() -> void:
     princesse.reload_fart()
+
+func _on_hud_screen_is_ready() -> void:
+    princesse.go_out_and_play()

game.tscn

@@ -1,13 +1,13 @@
-[gd_scene load_steps=4 format=3 uid="uid://dn0b30kvaeasf"]
+[gd_scene load_steps=3 format=3 uid="uid://dn0b30kvaeasf"]
 
 [ext_resource type="Script" path="res://game.gd" id="1_yny56"]
 [ext_resource type="PackedScene" uid="uid://dvlb4thqhqke" path="res://HUD/hud.tscn" id="2_0fnfe"]
-[ext_resource type="Script" path="res://HUD/hud.gd" id="3_x1wcj"]
 
 [node name="game" type="Node"]
 script = ExtResource("1_yny56")
 
 [node name="HUD" parent="." instance=ExtResource("2_0fnfe")]
-script = ExtResource("3_x1wcj")
 
 [connection signal="fart_reloaded" from="HUD" to="." method="_on_hud_fart_reloaded"]
+[connection signal="screen_is_black" from="HUD" to="." method="_on_hud_screen_is_black"]
+[connection signal="screen_is_ready" from="HUD" to="." method="_on_hud_screen_is_ready"]

princesse.gd

@@ -512,7 +512,7 @@ func get_new_animation() -> String:
     return animation_new
 
 func _physics_process(_delta: float) -> void:
-    if dead:
+    if dead or locked:
         return
     compute_state()
     read_input()
@@ -540,7 +540,7 @@ func death() -> void:
         dead = true
         death_animation.play(&"death")
 
-func _ready():
+func go_out_and_play():
     locked = false
     dead = false
 

shaders/masks/curtain.png.import

@@ -0,0 +1,35 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://b5mne7k2hxq4m"
+path.s3tc="res://.godot/imported/curtain.png-5dbd4676444a95ae3c4ec4f3e7000c6e.s3tc.ctex"
+metadata={
+"imported_formats": ["s3tc_bptc"],
+"vram_texture": true
+}
+
+[deps]
+
+source_file="res://shaders/masks/curtain.png"
+dest_files=["res://.godot/imported/curtain.png-5dbd4676444a95ae3c4ec4f3e7000c6e.s3tc.ctex"]
+
+[params]
+
+compress/mode=2
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=true
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=0

shaders/masks/shards.png.import

@@ -0,0 +1,35 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://dwn3g5smhhcb0"
+path.s3tc="res://.godot/imported/shards.png-8f1a380663fac4b8c90fd5ea54d3ed72.s3tc.ctex"
+metadata={
+"imported_formats": ["s3tc_bptc"],
+"vram_texture": true
+}
+
+[deps]
+
+source_file="res://shaders/masks/shards.png"
+dest_files=["res://.godot/imported/shards.png-8f1a380663fac4b8c90fd5ea54d3ed72.s3tc.ctex"]
+
+[params]
+
+compress/mode=2
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=true
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=0

shaders/transition_shader.gd

@@ -0,0 +1,11 @@
+extends ColorRect
+
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+    pass # Replace with function body.
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+    pass

shaders/transition_shader.gdshader

@@ -0,0 +1,16 @@
+shader_type canvas_item;
+render_mode unshaded;
+
+uniform float cutoff: hint_range(0.0, 1.0);
+uniform float smooth_size: hint_range(0.0, 0.1);
+uniform sampler2D mask: hint_default_black;
+
+void fragment() {
+    float value = texture(mask, UV).r;
+    float alpha = smoothstep(
+        cutoff,
+        cutoff + smooth_size,
+        value * (1.0 - smooth_size) + smooth_size
+    );
+    COLOR = vec4(COLOR.rgb, alpha);
+}

shaders/transition_shader.tscn

@@ -0,0 +1,90 @@
+[gd_scene load_steps=8 format=3 uid="uid://17macg0q4k8l"]
+
+[ext_resource type="Shader" path="res://shaders/transition_shader.gdshader" id="1_kyfmm"]
+[ext_resource type="Texture2D" uid="uid://b5mne7k2hxq4m" path="res://shaders/masks/curtain.png" id="2_pg1r4"]
+
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_g48os"]
+shader = ExtResource("1_kyfmm")
+shader_parameter/cutoff = 0.0
+shader_parameter/smooth_size = 0.1
+shader_parameter/mask = ExtResource("2_pg1r4")
+
+[sub_resource type="GDScript" id="GDScript_rrd13"]
+script/source = "class_name FadeShader extends ColorRect
+
+signal fade_in_done()
+signal fade_out_done()
+
+@onready var player := $\"AnimationPlayer\" as AnimationPlayer
+
+func fade_in():
+    player.play(&\"fade_in\")
+
+func fade_out():
+    player.play(&\"fade_out\")
+
+func _on_animation_player_animation_finished(anim_name: StringName) -> void:
+    if anim_name == \"fade_in\":
+        fade_in_done.emit()
+    elif anim_name == \"fade_out\":
+        fade_out_done.emit()
+"
+
+[sub_resource type="Animation" id="Animation_yg4ht"]
+resource_name = "fade_in"
+length = 0.5
+tracks/0/type = "value"
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/path = NodePath(".:material:shader_parameter/cutoff")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/keys = {
+"times": PackedFloat32Array(0.2, 0.4),
+"transitions": PackedFloat32Array(1, 0.450625),
+"update": 0,
+"values": [0.0, 1.0]
+}
+
+[sub_resource type="Animation" id="Animation_mavdc"]
+resource_name = "fade_out"
+length = 0.25
+tracks/0/type = "value"
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/path = NodePath(".:material:shader_parameter/cutoff")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/keys = {
+"times": PackedFloat32Array(0, 0.2),
+"transitions": PackedFloat32Array(1, 1),
+"update": 0,
+"values": [1.0, 0.0]
+}
+
+[sub_resource type="AnimationLibrary" id="AnimationLibrary_kedvi"]
+_data = {
+"fade_in": SubResource("Animation_yg4ht"),
+"fade_out": SubResource("Animation_mavdc")
+}
+
+[node name="TransitionShader" type="ColorRect"]
+material = SubResource("ShaderMaterial_g48os")
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+offset_right = -1680.0
+offset_bottom = -945.0
+grow_horizontal = 2
+grow_vertical = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+color = Color(0, 0, 0, 1)
+script = SubResource("GDScript_rrd13")
+
+[node name="AnimationPlayer" type="AnimationPlayer" parent="."]
+libraries = {
+"": SubResource("AnimationLibrary_kedvi")
+}
+
+[connection signal="animation_finished" from="AnimationPlayer" to="." method="_on_animation_player_animation_finished"]