Fix cameras on difficulty creation

assets/data/global.hx

@@ -1,3 +1,3 @@
-function update(elapsed)
-    if (FlxG.keys.justPressed.F5)
-        FlxG.resetState();
+//
+function update(elapsed:Float)
+    if (FlxG.keys.justPressed.F5) FlxG.resetState();

assets/shaders/engine/cameraClip.frag

@@ -0,0 +1,17 @@
+#pragma header
+
+// Used in difficulty screen
+
+uniform vec4 clipRect;
+
+bool boxCollision(vec2 pixel, vec4 rect) {
+	return (pixel.x >= rect.x) && (pixel.x < rect.x + rect.z) && (pixel.y >= rect.y) && (pixel.y < rect.y + rect.w);
+}
+
+void main()
+{
+	vec2 pixel = gl_FragCoord.xy;
+
+	if (boxCollision(pixel, clipRect)) gl_FragColor = flixel_texture2D(bitmap, openfl_TextureCoordv.xy);
+	else gl_FragColor = vec4(0.);
+}

assets/shaders/engine/colorPicker.frag

@@ -1,5 +1,7 @@
 #pragma header
 
+// Used in colorwheel
+
 vec3 hsvToRgb(vec3 c) { //hsv.x = hue, hsv.y = saturation, hsv.z = value
     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);

assets/shaders/engine/editorBlur.frag

@@ -1,6 +1,8 @@
 #pragma header
 #define PI 3.14159265359
 
+// Used for editors
+
 int steps = 16;
 int stepsInside = 2;
 float strength = 0.0075;

assets/shaders/engine/editorBlurFast.frag

@@ -1,5 +1,7 @@
 #pragma header
 
+// Used for editors (faster)
+
 //#define iResolution _camSize
 #define getTexture textureCam
 

source/funkin/editors/charter/ChartCreationScreen.hx

@@ -1,5 +1,7 @@
 package funkin.editors.charter;
 
+import funkin.backend.shaders.CustomShader;
+import flixel.math.FlxRect;
 import funkin.game.Character;
 import funkin.game.Stage;
 import funkin.game.HealthIcon;
@@ -159,6 +161,8 @@ class StrumLineButton extends UIButton {
 	public var labels:Map<UISprite, UIText> = [];
 	public var XYComma:UIText;
 
+	public var cameraClipShader:CustomShader;
+
 	public function new(id:Int, strumLine:ChartStrumLine, parent:UIButtonList<StrumLineButton>) {
 		super(0, 0, '', function () {}, 620, 246);
 
@@ -178,6 +182,10 @@ class StrumLineButton extends UIButton {
 		members.push(charactersList);
 		idText = addLabelOn(charactersList, 'Strumline - #$id');
 
+		cameraClipShader = new CustomShader("engine/cameraClip");
+		cameraClipShader.hset("clipRect", [0, 0, 100, 100]);
+		charactersList.buttonCameras.addShader(cameraClipShader);
+
 		typeDropdown = new UIDropDown(charactersList.x + charactersList.bWidth + 16, 8+26, 200, 32, ["OPPONENT", "PLAYER", "ADDITIONAL"], strumLine.type);
 		members.push(typeDropdown);
 		addLabelOn(typeDropdown, "Type");
@@ -256,6 +264,10 @@ class StrumLineButton extends UIButton {
 		XYComma.follow(hudXStepper, 84 - 32, 9);
 		for (ui => text in labels)
 			text.follow(ui, 0, -24);
+
+		var subState:ChartCreationScreen = cast FlxG.state.subState;
+		var strumLineList:UIButtonList<StrumLineButton> = subState.strumLineList;
+		cameraClipShader.hset("clipRect", [0, (-y-(8+26))+cameras[0].scroll.y, strumLineList.bWidth, strumLineList.bHeight]);
 	}
 }