Added a spherize shader effect

.import/lightCircle.png-a3507553ed6057620698a8dd1a17667a.md5

@@ -0,0 +1,3 @@
+source_md5="53eb00c125d9569a147522afb8f4abe4"
+dest_md5="67ad372813d14eb7a41cc71f6bca97ef"
+

.import/lightCircleSoft.png-ee54b91191ee041a2998e9fdfe86bbf5.md5

@@ -0,0 +1,3 @@
+source_md5="3e3862ffc108f0fd4e1289705f8f7dc2"
+dest_md5="94d7c5aff999f9c79aa125eb3d0aaa09"
+

Resources/Textures/lightCircle.png.import

@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="StreamTexture"
+path="res://.import/lightCircle.png-a3507553ed6057620698a8dd1a17667a.stex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://Resources/Textures/lightCircle.png"
+dest_files=[ "res://.import/lightCircle.png-a3507553ed6057620698a8dd1a17667a.stex" ]
+
+[params]
+
+compress/mode=0
+compress/lossy_quality=0.7
+compress/hdr_mode=0
+compress/bptc_ldr=0
+compress/normal_map=0
+flags/repeat=0
+flags/filter=true
+flags/mipmaps=false
+flags/anisotropic=false
+flags/srgb=2
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/HDR_as_SRGB=false
+process/invert_color=false
+stream=false
+size_limit=0
+detect_3d=true
+svg/scale=1.0

Resources/Textures/lightCircleSoft.png.import

@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="StreamTexture"
+path="res://.import/lightCircleSoft.png-ee54b91191ee041a2998e9fdfe86bbf5.stex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://Resources/Textures/lightCircleSoft.png"
+dest_files=[ "res://.import/lightCircleSoft.png-ee54b91191ee041a2998e9fdfe86bbf5.stex" ]
+
+[params]
+
+compress/mode=0
+compress/lossy_quality=0.7
+compress/hdr_mode=0
+compress/bptc_ldr=0
+compress/normal_map=0
+flags/repeat=0
+flags/filter=true
+flags/mipmaps=false
+flags/anisotropic=false
+flags/srgb=2
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/HDR_as_SRGB=false
+process/invert_color=false
+stream=false
+size_limit=0
+detect_3d=true
+svg/scale=1.0

Resources/spherizeShader.tres

@@ -0,0 +1,45 @@
+[gd_resource type="ShaderMaterial" load_steps=2 format=2]
+
+[sub_resource type="Shader" id=1]
+code = "//Copy-paste from a comment here: https://godotengine.org/qa/13023/shaders-how-does-one-create-blackhole-effect-using-shaders
+shader_type canvas_item;
+// Be gentle on this one
+uniform float strength = 0;
+
+float sqr(float x) {return x*x;}
+
+float shelf_curve(float x){
+	// Simple parabola. Could use a smoothstep instead?
+	return clamp(1.0 - sqr(2.0*x), 0, 1);
+}
+
+void fragment(){
+	// Get direction and distance to the black hole center
+	vec2 diff = vec2(0.5, 0.5) - vec2(UV.x, 1.0-UV.y);
+	float d = length(diff);
+	vec2 dir = normalize(diff);
+	
+	// This is a 0..1 value that will nullify displacement around the bounds of the effect,
+	// for a seamless transition between the effect's area and the unaffected world pixels.
+	float shelf = shelf_curve(length(UV-vec2(0.5, 0.5)));
+	
+	// Calculate displacement amount
+	float displacement = strength / (d*d + 0.01);
+	
+	// Calculate distorted screen-space texture coordinates
+	vec2 uv = SCREEN_UV + dir * (displacement * shelf);
+	
+	// Output pixels from the screen using distorted UVs
+//	vec3 col = texscreen(uv);
+	vec2 PixelSize = TEXTURE_PIXEL_SIZE;
+	vec4 r_val = texture(SCREEN_TEXTURE, uv);
+	vec4 g_val = texture(SCREEN_TEXTURE, uv);
+	vec4 b_val = texture(SCREEN_TEXTURE, uv);
+	
+	vec3 col = vec3(r_val.r, g_val.g, b_val.b);
+	COLOR.rgb = col;
+}"
+
+[resource]
+shader = SubResource( 1 )
+shader_param/strength = 0.01

Scenes/player_default/player.gd

@@ -31,6 +31,7 @@ const maxDiveBuffer=0.51
 var target_rotation=0
 const twn_duration=0.25
 const spritetrail=preload('res://Scenes/spritetrail/sprite_trail.tscn')
+const spherizeShader=preload("res://Scenes/spherizeShader.tscn")
 const drop=preload("res://Scenes/drop.tscn")
 
 onready var dive_aim=$dive_aim/dive_aim
@@ -88,6 +89,7 @@ func _state_normal(delta,vector_direction_input):
 			$twn_dive.interpolate_property(self, 'global_position', self.global_position,vector_target_position, twn_duration, Tween.TRANS_QUART, Tween.EASE_OUT)
 			$twn_dive.start()
 			create_splash(20,30,-(self.global_position-vector_target_position),(self.global_position-vector_target_position)/2)
+			createSpherize()
 	else:
 		vectorVelocity.x=lerp(vectorVelocity.x, maximum_speed*vector_direction_input.x, lerp_constant)
 		var initialVelocity=vectorVelocity
@@ -116,7 +118,10 @@ func create_splash(minimum=5,maximum=10,direction=Vector2(0,-1),offset=Vector2()
 		i.global_position=self.global_position+offset*Vector2(rand_range(-0.5,0.5),rand_range(-0.5,0.5))
 		i.direction=direction.normalized()
 		get_tree().current_scene.add_child(i)
-
+func createSpherize():
+	var i=spherizeShader.instance()
+	i.global_position=self.global_position
+	get_tree().root.add_child(i)
 func _create_spritetrail():
 	if flag_can_create_spritetrail == true:
 		flag_can_create_spritetrail = false; $timers/tmr_spritetrail.start()

Scenes/spherizeShader.tscn

@@ -0,0 +1,24 @@
+[gd_scene load_steps=4 format=2]
+
+[ext_resource path="res://resources/textures/lightCircle.png" type="Texture" id=1]
+[ext_resource path="res://Resources/spherizeShader.tres" type="Material" id=2]
+
+[sub_resource type="GDScript" id=1]
+script/source = "extends Sprite
+var duration=3
+var strength=0.00033
+func _ready():
+	$twnStrength.interpolate_property(self.material,\"shader_param/strength\",strength,0,duration,Tween.TRANS_QUINT,Tween.EASE_OUT)
+	$twnStrength.interpolate_property(self,\"modulate:a\",0.8,0,duration,Tween.TRANS_QUINT,Tween.EASE_OUT)
+	$twnStrength.start()
+func _on_twnStrength_tween_all_completed():self.queue_free()
+"
+
+[node name="spriteShader" type="Sprite"]
+material = ExtResource( 2 )
+texture = ExtResource( 1 )
+normal_map = ExtResource( 1 )
+script = SubResource( 1 )
+
+[node name="twnStrength" type="Tween" parent="."]
+[connection signal="tween_all_completed" from="twnStrength" to="." method="_on_twnStrength_tween_all_completed"]