- Fix a bug with the River carver

- Add '/terra defaults set' command
- Add extra checks to make sure terrain modules are clamped between 0.0-1.0

TerraForgedCore/src/main/java/com/terraforged/core/settings/RiverSettings.java

@@ -54,7 +54,7 @@ public class RiverSettings {
         @Comment("Controls the depth of the river")
         public int bedDepth;
 
-        @Range(min = 1, max = 10)
+        @Range(min = 0, max = 10)
         @Comment("Controls the height of river banks")
         public int minBankHeight;
 

TerraForgedCore/src/main/java/com/terraforged/core/settings/TerrainSettings.java

@@ -28,6 +28,7 @@ package com.terraforged.core.settings;
 import com.terraforged.core.util.serialization.annotation.Comment;
 import com.terraforged.core.util.serialization.annotation.Range;
 import com.terraforged.core.util.serialization.annotation.Serializable;
+import com.terraforged.core.world.terrain.TerrainPopulator;
 import me.dags.noise.Module;
 
 @Serializable
@@ -83,10 +84,8 @@ public class TerrainSettings {
         public Module apply(double bias, double scale, Module module) {
             double moduleBias = bias * baseScale;
             double moduleScale = scale * verticalScale;
-            if (moduleBias + moduleScale > 1) {
-                return module.scale(moduleScale).bias(moduleBias).clamp(0, 1);
-            }
-            return module.scale(moduleScale).bias(moduleBias);
+            Module outputModule = module.scale(moduleScale).bias(moduleBias);
+            return TerrainPopulator.clamp(outputModule);
         }
     }
 }

TerraForgedCore/src/main/java/com/terraforged/core/world/rivermap/river/River.java

@@ -177,8 +177,9 @@ public class River extends TerrainPopulator {
     }
 
     private void carveBed(Cell<Terrain> cell, float bedAlpha, float bedHeight) {
-        // lerp the height down to  the riverbed height
-        cell.value = NoiseUtil.lerp(cell.value, bedHeight, bedAlpha);
+        if (cell.value > bedHeight) {
+            cell.value = NoiseUtil.lerp(cell.value, bedHeight, bedAlpha);
+        }
         tag(cell, terrains.river);
     }
 

TerraForgedCore/src/main/java/com/terraforged/core/world/terrain/TerrainPopulator.java

@@ -36,7 +36,7 @@ public class TerrainPopulator implements Populator {
 
     public TerrainPopulator(Module source, Terrain type) {
         this.type = type;
-        this.source = source;
+        this.source = clamp(source);
     }
 
     public Module getSource() {
@@ -57,4 +57,11 @@ public class TerrainPopulator implements Populator {
     public void tag(Cell<Terrain> cell, float x, float y) {
         cell.tag = type;
     }
+
+    public static Module clamp(Module module) {
+        if (module.minValue() < 0 || module.maxValue() > 1) {
+            return module.clamp(0, 1);
+        }
+        return module;
+    }
 }

TerraForgedCore/src/main/java/com/terraforged/core/world/terrain/provider/StandardTerrainProvider.java

@@ -125,7 +125,8 @@ public class StandardTerrainProvider implements TerrainProvider {
         Terrain type = new Terrain(name, id, weight);
         Module combined = Source.perlin(seed.next(), scale, 1)
                 .warp(seed.next(), scale / 2, 2, scale / 2D)
-                .blend(tp1.getSource(), tp2.getSource(), 0.5, 0.25);
+                .blend(tp1.getSource(), tp2.getSource(), 0.5, 0.25)
+                .clamp(0, 1);
 
         return new TerrainPopulator(combined, type);
     }

TerraForgedMod/src/main/java/com/terraforged/mod/command/TerraCommand.java

@@ -46,6 +46,7 @@ import com.terraforged.mod.command.search.BothSearchTask;
 import com.terraforged.mod.command.search.Search;
 import com.terraforged.mod.command.search.TerrainSearchTask;
 import com.terraforged.mod.data.DataGen;
+import com.terraforged.mod.settings.SettingsHelper;
 import net.minecraft.command.CommandSource;
 import net.minecraft.command.Commands;
 import net.minecraft.entity.player.PlayerEntity;
@@ -94,6 +95,9 @@ public class TerraCommand {
                 .then(Commands.literal("data")
                         .then(Commands.literal("dump")
                                 .executes(TerraCommand::dump)))
+                .then(Commands.literal("defaults")
+                        .then(Commands.literal("set")
+                                .executes(TerraCommand::setDefaults)))
                 .then(Commands.literal("debug")
                         .executes(TerraCommand::debugBiome))
                 .then(Commands.literal("locate")
@@ -134,6 +138,20 @@ public class TerraCommand {
         return Command.SINGLE_SUCCESS;
     }
 
+    private static int setDefaults(CommandContext<CommandSource> context) throws CommandSyntaxException {
+        TerraContext terraContext = getContext(context).orElseThrow(() -> createException(
+                "Invalid world type",
+                "This command can only be run in a TerraForged world!"
+        ));
+
+        context.getSource().sendFeedback(
+                new StringTextComponent("Setting generator defaults"),
+                true
+        );
+        SettingsHelper.exportDefaults(terraContext.terraSettings);
+        return Command.SINGLE_SUCCESS;
+    }
+
     private static int debugBiome(CommandContext<CommandSource> context) throws CommandSyntaxException {
         ServerPlayerEntity player = context.getSource().asPlayer();
         BlockPos position = player.getPosition();