From f3bf578d4e4901ef326b8c8211118665f160b474 Mon Sep 17 00:00:00 2001
From: Cameron Taylor <cameron.taylor.ninja@gmail.com>
Date: Sat, 11 Sep 2021 14:08:34 -0400
Subject: [PATCH] screen wipe shader stuff testing

---
 source/MainMenuState.hx                 | 15 ++++++
 source/shaderslmfao/ScreenWipeShader.hx | 72 +++++++++++++++++++++++++
 2 files changed, 87 insertions(+)
 create mode 100644 source/shaderslmfao/ScreenWipeShader.hx

diff --git a/source/MainMenuState.hx b/source/MainMenuState.hx
index 3ae385080..f52018913 100644
--- a/source/MainMenuState.hx
+++ b/source/MainMenuState.hx
@@ -16,6 +16,8 @@ import flixel.ui.FlxButton;
 import flixel.util.FlxColor;
 import flixel.util.FlxTimer;
 import lime.app.Application;
+import openfl.filters.ShaderFilter;
+import shaderslmfao.ScreenWipeShader;
 import ui.AtlasMenuList;
 import ui.MenuList;
 import ui.OptionsState;
@@ -250,6 +252,19 @@ class MainMenuState extends MusicBeatState
 
 	override function update(elapsed:Float)
 	{
+		if (FlxG.keys.justPressed.N)
+		{
+			var screenShit:FlxSprite = new FlxSprite().loadGraphic(Paths.image("shaderTransitionStuff/coolDots"));
+
+			var screenWipeShit:ScreenWipeShader = new ScreenWipeShader();
+
+			screenWipeShit.funnyShit.input = screenShit.pixels;
+
+			FlxTween.tween(screenWipeShit, {daAlphaShit: 1}, 2, {ease: FlxEase.quadInOut});
+
+			FlxG.camera.setFilters([new ShaderFilter(screenWipeShit)]);
+		}
+
 		if (FlxG.onMobile)
 		{
 			var touch:FlxTouch = FlxG.touches.getFirst();
diff --git a/source/shaderslmfao/ScreenWipeShader.hx b/source/shaderslmfao/ScreenWipeShader.hx
new file mode 100644
index 000000000..5264f7c33
--- /dev/null
+++ b/source/shaderslmfao/ScreenWipeShader.hx
@@ -0,0 +1,72 @@
+package shaderslmfao;
+
+import flixel.system.FlxAssets.FlxShader;
+
+class ScreenWipeShader extends FlxShader
+{
+	public var daAlphaShit(default, set):Float = 0;
+
+	function set_daAlphaShit(alpha:Float):Float
+	{
+		alphaShit.value[0] = alpha;
+
+		return alpha;
+	}
+
+	@:glFragmentSource('
+        #pragma header
+
+        uniform float alphaShit;
+		uniform float yPos;
+		uniform float xPos;
+
+		uniform sampler2D funnyShit;
+
+
+        vec3 rgb2hsv(vec3 c)
+        {
+            vec4 K = vec4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);
+            vec4 p = mix(vec4(c.bg, K.wz), vec4(c.gb, K.xy), step(c.b, c.g));
+            vec4 q = mix(vec4(p.xyw, c.r), vec4(c.r, p.yzx), step(p.x, c.r));
+
+            float d = q.x - min(q.w, q.y);
+            float e = 1.0e-10;
+            return vec3(abs(q.z + (q.w - q.y) / (6.0 * d + e)), d / (q.x + e), q.x);
+        }
+
+        vec3 hsv2rgb(vec3 c)
+        {
+            vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
+            vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
+            return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
+        }
+
+        void main()
+        {
+			vec2 funnyUv = openfl_TextureCoordv;
+            vec4 color = flixel_texture2D(bitmap, funnyUv);
+            
+			vec2 reallyFunnyUv = vec2(vec2(0.0, 0.0) - gl_FragCoord.xy / openfl_TextureSize.xy);
+
+			vec4 gf = flixel_texture2D(funnyShit, openfl_TextureCoordv);
+
+
+            vec3 hsvTypeBeat = rgb2hsv(vec3(gf.r, gf.g, gf.b));
+
+			vec4 output = color;
+
+            // .b here actually means value?
+			if (hsvTypeBeat.b <= alphaShit)
+				color = vec4(0.0, 0.0, 0.0, 0.0);
+
+
+            gl_FragColor = color;
+        }
+    ')
+	public function new()
+	{
+		super();
+
+		alphaShit.value = [0];
+	}
+}