fix client methods in biome, fixes #870

src/main/java/carpet/fakes/BiomeEffectsInterface.java

@@ -0,0 +1,12 @@
+package carpet.fakes;
+
+import java.util.Optional;
+
+public interface BiomeEffectsInterface
+{
+    int getCMFogColor();
+    Optional<Integer> getCMFoliageColor();
+    int getCMSkyColor();
+    int getCMWaterColor();
+    int getCMWaterFogColor();
+}

src/main/java/carpet/mixins/BiomeEffects_scarpetMixin.java

@@ -0,0 +1,53 @@
+package carpet.mixins;
+
+import carpet.fakes.BiomeEffectsInterface;
+import net.minecraft.world.biome.BiomeEffects;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+import java.util.Optional;
+
+@Mixin(BiomeEffects.class)
+public class BiomeEffects_scarpetMixin implements BiomeEffectsInterface
+{
+    @Shadow @Final private int fogColor;
+
+    @Shadow @Final private Optional<Integer> foliageColor;
+
+    @Shadow @Final private int skyColor;
+
+    @Shadow @Final private int waterColor;
+
+    @Shadow @Final private int waterFogColor;
+
+    @Override
+    public int getCMFogColor()
+    {
+        return fogColor;
+    }
+
+    @Override
+    public Optional<Integer> getCMFoliageColor()
+    {
+        return foliageColor;
+    }
+
+    @Override
+    public int getCMSkyColor()
+    {
+        return skyColor;
+    }
+
+    @Override
+    public int getCMWaterColor()
+    {
+        return waterColor;
+    }
+
+    @Override
+    public int getCMWaterFogColor()
+    {
+        return waterFogColor;
+    }
+}

src/main/java/carpet/script/utils/BiomeInfo.java

@@ -1,12 +1,15 @@
 package carpet.script.utils;
 
+import carpet.fakes.BiomeEffectsInterface;
 import carpet.script.value.BlockValue;
 import carpet.script.value.ListValue;
 import carpet.script.value.NumericValue;
 import carpet.script.value.StringValue;
 import carpet.script.value.Value;
 import carpet.script.value.ValueConversions;
+import net.minecraft.client.color.world.FoliageColors;
 import net.minecraft.server.world.ServerWorld;
+import net.minecraft.util.math.MathHelper;
 import net.minecraft.util.registry.Registry;
 import net.minecraft.world.biome.Biome;
 import net.minecraft.world.gen.feature.ConfiguredFeature;
@@ -18,16 +21,23 @@ import java.util.function.BiFunction;
 
 public class BiomeInfo
 {
+    // copy of from Biome.getDefaultFoliageColor
+    private static int getDefaultFoliageColor(Biome b) {
+        double d = MathHelper.clamp(b.getTemperature(), 0.0F, 1.0F);
+        double e = MathHelper.clamp(b.getDownfall(), 0.0F, 1.0F);
+        return FoliageColors.getColor(d, e);
+    }
+
     public final static Map<String, BiFunction<ServerWorld, Biome, Value>> biomeFeatures = new HashMap<String, BiFunction<ServerWorld, Biome, Value>>(){{
         put("top_material", (w, b) -> new BlockValue( b.getGenerationSettings().getSurfaceConfig().getTopMaterial(), null, null));
         put("under_material", (w, b) -> new BlockValue( b.getGenerationSettings().getSurfaceConfig().getUnderMaterial(), null, null));
         put("category", (w, b) -> StringValue.of(b.getCategory().getName()));
         put("temperature", (w, b) -> NumericValue.of(b.getTemperature()));
-        put("fog_color", (w, b) -> ValueConversions.ofRGB(b.getFogColor()));
-        put("foliage_color", (w, b) -> ValueConversions.ofRGB(b.getFoliageColor()));
-        put("sky_color", (w, b) -> ValueConversions.ofRGB(b.getSkyColor()));
-        put("water_color", (w, b) -> ValueConversions.ofRGB(b.getWaterColor()));
-        put("water_fog_color", (w, b) -> ValueConversions.ofRGB(b.getWaterFogColor()));
+        put("fog_color", (w, b) -> ValueConversions.ofRGB(((BiomeEffectsInterface)b.getEffects()).getCMFogColor()));
+        put("foliage_color", (w, b) -> ValueConversions.ofRGB(((BiomeEffectsInterface)b.getEffects()).getCMFoliageColor().orElseGet(() -> getDefaultFoliageColor(b))));
+        put("sky_color", (w, b) -> ValueConversions.ofRGB(((BiomeEffectsInterface)b.getEffects()).getCMSkyColor()));
+        put("water_color", (w, b) -> ValueConversions.ofRGB(((BiomeEffectsInterface)b.getEffects()).getCMWaterColor()));
+        put("water_fog_color", (w, b) -> ValueConversions.ofRGB(((BiomeEffectsInterface)b.getEffects()).getCMWaterFogColor()));
         put("humidity", (w, b) -> NumericValue.of(b.getDownfall()));
         put("precipitation", (w, b) -> StringValue.of(b.getPrecipitation().getName()));
         put("depth", (w, b) -> NumericValue.of(b.getDepth()));