Fix snowy biome colours + warning screen.

src/main/generated/.cache/479d532b8ab79818d0335395e7c3c8b4e15a0c44

@@ -1,15 +1,15 @@
-// 1.21.1	2024-08-30T19:57:10.8858252	Fog/Custom Fog Definition:fog
+// 1.21.1	2024-08-31T10:48:07.9332249	Fog/Custom Fog Definition:fog
 ed7a26be0cdc64db4e2714898fec43817761c00b assets\minecraft\fog_definitions\biome\crimson_forest.json
-61268868389f80ddd2fc175dab578a5a6d3775dd assets\c\fog_definitions\tag\biome\is_aquatic_icy.json
-bdf7dff67ada32610d3c8970f29d8c74d654ca55 assets\c\fog_definitions\tag\biome\is_beach.json
-efa18c3764d4d5d57a4ca2f3dabd69d188148a19 assets\minecraft\fog_definitions\biome\soul_sand_valley.json
-ff9939863833df7f1cc8b94bec65cb20c1272cce assets\c\fog_definitions\tag\biome\is_snowy.json
 081f23017dccbbbbf86d0fed5183724dd3b2fae7 assets\minecraft\fog_definitions\biome\basalt_deltas.json
 0aadd5cec8445c0814015d19f23cfb515e4fff62 assets\c\fog_definitions\tag\biome\is_badlands.json
-d18991fdc8b5c612a3ae1b45144585860b1bf064 assets\minecraft\fog_definitions\biome\nether_wastes.json
 6ab53206f31ea26518ebf301389f655c2846e67e assets\c\fog_definitions\tag\biome\is_desert.json
+d18991fdc8b5c612a3ae1b45144585860b1bf064 assets\minecraft\fog_definitions\biome\nether_wastes.json
 024071636ecdb7f6288625a11a90b2d75d65c917 assets\minecraft\fog_definitions\biome\sparse_jungle.json
+61268868389f80ddd2fc175dab578a5a6d3775dd assets\c\fog_definitions\tag\biome\is_aquatic_icy.json
+bdf7dff67ada32610d3c8970f29d8c74d654ca55 assets\c\fog_definitions\tag\biome\is_beach.json
+efa18c3764d4d5d57a4ca2f3dabd69d188148a19 assets\minecraft\fog_definitions\biome\soul_sand_valley.json
 4a095b16c1146432aee0cd907ceb87d33c031738 assets\c\fog_definitions\tag\biome\is_end.json
 5e48288dad15e0c0bfd3db7ada891bc50cdbc5a2 assets\c\fog_definitions\tag\biome\is_jungle.json
 450e4e8e01a0af4128b371ad342d4a0d7bd9e560 assets\c\fog_definitions\tag\biome\is_swamp.json
 e21ca1bacda76f8e67c3a79262c54bb45b0f70ce assets\minecraft\fog_definitions\biome\warped_forest.json
+66dbd1cc3283d1f6a3f9f8c789e67baabc193059 assets\c\fog_definitions\tag\biome\is_snowy.json

src/main/generated/assets/c/fog_definitions/tag/biome/is_snowy.json

@@ -1,7 +1,7 @@
 {
   "colors": {
-    "day": "#F4F9EF",
-    "night": "#F4F9EF"
+    "day": "#DFEBF4",
+    "night": "#687782"
   },
   "end_multiplier": 1.0,
   "start_multiplier": 1.0

src/main/java/dev/imb11/fog/client/util/UpdateWarningHelper.java

@@ -0,0 +1,52 @@
+package dev.imb11.fog.client.util;
+
+import dev.imb11.fog.client.FogClient;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.gui.screen.ConfirmScreen;
+import net.minecraft.client.gui.screen.TitleScreen;
+import net.minecraft.screen.ScreenTexts;
+import net.minecraft.text.Text;
+
+import java.nio.file.Files;
+
+public class UpdateWarningHelper {
+	// TODO: Bump this every time you modify something within the datagen classes.
+	public static int getDatagenVersion() {
+		return 1;
+	}
+
+	public static void checkVersion() {
+		var datagenVersionPath = FogClient.getConfigFolder().resolve("datagen.version");
+
+		boolean shouldWarn = true;
+		// Check if datagenVersionPath content is < datagenVersion
+		if (datagenVersionPath.toFile().exists()) {
+			try {
+				var version = Integer.parseInt(Files.readString(datagenVersionPath));
+				if (version >= getDatagenVersion()) {
+					shouldWarn = false;
+				}
+			} catch (Exception e) {
+				// Ignore
+			}
+		}
+
+		if (shouldWarn) {
+			MinecraftClient client = MinecraftClient.getInstance();
+
+			client.setScreen(new ConfirmScreen(
+					confirmed -> {
+						try {
+							Files.writeString(datagenVersionPath, Integer.toString(getDatagenVersion()));
+						} catch (Exception ignored) {}
+						client.setScreen(new TitleScreen());
+					},
+					Text.translatable("fog.datagen_warning.title"),
+					Text.translatable("fog.datagen_warning.message"),
+					ScreenTexts.OK,
+					ScreenTexts.OK
+			));
+			FogClient.LOGGER.info("Datagen warning displayed - you may need to delete the `.minecraft/config/fog/fog_definitions` folder.");
+		}
+	}
+}

src/main/java/dev/imb11/fog/loaders/fabric/datagen/VanillaFogDefinitionProvider.java

@@ -55,7 +55,7 @@ public void acceptBiomeTags(@NotNull BiConsumer<TagKey<Biome>, CustomFogDefiniti
 				.colors("#D1C8AB", "#827D6A").build());
 
 		provider.accept(ConventionalBiomeTags.IS_SNOWY, CustomFogDefinition.Builder.create()
-				.colors("#F4F9EF", "#F4F9EF").build());
+				.colors("#DFEBF4", "#687782").build());
 
 		provider.accept(ConventionalBiomeTags.IS_AQUATIC_ICY, CustomFogDefinition.Builder.create()
 				.colors("#BDDBE1", "#526C72").build());

src/main/java/dev/imb11/fog/mixin/client/ui/TitleScreenMixin.java

@@ -0,0 +1,28 @@
+package dev.imb11.fog.mixin.client.ui;
+
+import dev.imb11.fog.client.util.UpdateWarningHelper;
+import net.minecraft.client.gui.DrawContext;
+import net.minecraft.client.gui.screen.TitleScreen;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(TitleScreen.class)
+public class TitleScreenMixin {
+	@Shadow
+	private boolean doBackgroundFade;
+
+	@Unique
+	private static boolean hasShown = false;
+
+	@Inject(at = @At("HEAD"), method = "render")
+	public void showAfterLoaded(DrawContext context, int mouseX, int mouseY, float delta, CallbackInfo ci) {
+		if (this.doBackgroundFade && !hasShown) {
+			UpdateWarningHelper.checkVersion();
+			hasShown = true;
+		}
+	}
+}

src/main/resources/assets/fog/lang/en_us.json

@@ -1,4 +1,6 @@
 {
+  "fog.datagen_warning.title": "§6§l§nWarning!§r",
+  "fog.datagen_warning.message": "Fog has been updated, changing the default biome fog colors.\nPlease back up your changes to the `.minecraft/config/fog/fog_definitions` folder before deleting it to apply the new changes.\nThis will not be shown again. (Note: Pressing 'OK' will not delete the folder for you.)",
   "fog.config.category.fog_calculations": "Fog Calculations",
   "fog.config.option.fog_calculations.warning": "§6§l§nWarning!§r It is not recommended to touch these constants unless you understand what they do, and how they are used.\nConsider leaving them as-is for the best experience.",
   "fog.config.option.initial_fog_start": "Initial Fog Start",

src/main/resources/fog.mixins.json

@@ -10,6 +10,7 @@
   "mixins": [],
   "client": [
     "client.rendering.BackgroundRendererMixin",
-    "client.rendering.WorldRendererMixin"
+    "client.rendering.WorldRendererMixin",
+    "client.ui.TitleScreenMixin"
   ]
 }