js chunkgen + fixes + scriptengine work

assets/Scripts/engine/engine-init.ts

@@ -4,6 +4,7 @@ import { HookManager } from '/Scripts/engine/hooks/hook-manager'
 import { SceneLoader } from '/Scripts/engine/scene/scene-loader'
 import { Engine } from '/Scripts/types/engine'
 import { clientHooks } from '/Scripts/client/clienthooks'
+import { ChunkGeneratorManager } from '/Scripts/server/chunk/chunkgeneratormanager'
 
 /**
  * The core engine values
@@ -13,6 +14,7 @@ export const engine: Engine = {
     singletons: {},
     hookManager: new HookManager(),
     sceneLoader: new SceneLoader(),
+    chunkGeneratorManager: new ChunkGeneratorManager(),
 }
 
 /**
@@ -25,6 +27,7 @@ export const ENGINE_onInit = () => {
     let client: NamespaceClient = Client
     engine.sceneLoader.engine = engine
     engine.hookManager.engine = engine
+    engine.chunkGeneratorManager.engine = engine
 
     //load global hooks
     clientHooks.forEach(hook => {

assets/Scripts/server/chunk/chunkgeneratormanager.ts

@@ -0,0 +1,39 @@
+import { TestGen } from "/Scripts/server/chunk/generators/testgen"
+import { Engine } from "/Scripts/types/engine"
+import { ChunkGenerator, VoxelFunction } from "/Scripts/types/host/server/chunk/chunkgenerator"
+
+
+
+/**
+ * Manages all the chunk generators defined script-side
+ */
+export class ChunkGeneratorManager {
+
+    /**
+     * The parent engine object
+     */
+    engine: Engine
+
+    /**
+     * The list of registered chunk generators
+     */
+    readonly registeredGenerators: ChunkGenerator[] = [
+        TestGen,
+    ]
+
+    /**
+     * Gets the voxel function for the tag
+     * @param tag The tag
+     * @returns The voxel function if it exists, null otherwise
+     */
+    readonly getVoxelFunction = (tag: string): VoxelFunction => {
+        let rVal: VoxelFunction = null
+        this.registeredGenerators.forEach(generator => {
+            if(generator.getTag() === tag){
+                rVal = generator.getVoxelFunction(this.engine)
+            }
+        })
+        return rVal
+    }
+
+}

assets/Scripts/server/chunk/generators/testgen.ts

@@ -0,0 +1,159 @@
+import { Engine } from "/Scripts/types/engine";
+import { CHUNK_WIDTH, ChunkGenerator, GeneratedVoxel, VoxelFunction } from "/Scripts/types/host/server/chunk/chunkgenerator";
+import { BiomeData } from "/Scripts/types/host/server/data/biomedata";
+
+
+/**
+ * Converts a chunk coordinate to a real coordinate
+ * @param chunk The chunk pos
+ * @param world The world pos
+ * @returns The real pos
+ */
+const voxelToReal = (chunk: number, world: number) => {
+    return world * CHUNK_WIDTH + chunk
+}
+
+/**
+     * Gets the voxel on the surface
+     * @return The voxel
+     */
+const getSurfaceVoxel = (
+    voxel: GeneratedVoxel,
+    worldX: number, worldY: number, worldZ: number,
+    chunkX: number, chunkY: number, chunkZ: number,
+    realX: number, realY: number, realZ: number,
+    surfacePercent: number,
+    surfaceHeight: number,
+    surfaceBiome: BiomeData
+) => {
+    voxel.weight = surfacePercent * 2 - 1;
+    voxel.type = 2;
+    return voxel;
+}
+
+/**
+ * Gets the voxel below the surface
+ * @return The voxel
+ */
+const getSubsurfaceVoxel = (
+    voxel: GeneratedVoxel,
+    worldX: number, worldY: number, worldZ: number,
+    chunkX: number, chunkY: number, chunkZ: number,
+    realX: number, realY: number, realZ: number,
+    surfacePercent: number,
+    surfaceHeight: number,
+    surfaceBiome: BiomeData
+) => {
+    if(realY < surfaceHeight - 5){
+        voxel.weight = 1;
+        voxel.type = 6;
+    } else {
+        voxel.weight = 1;
+        voxel.type = 1;
+    }
+    return voxel;
+}
+
+/**
+ * Gets the voxel above the service
+ * @return The voxel
+ */
+const getOverSurfaceVoxel = (
+    voxel: GeneratedVoxel,
+    worldX: number, worldY: number, worldZ: number,
+    chunkX: number, chunkY: number, chunkZ: number,
+    realX: number, realY: number, realZ: number,
+    surfacePercent: number,
+    surfaceHeight: number,
+    surfaceBiome: BiomeData
+) => {
+    voxel.weight = -1;
+    voxel.type = 0;
+    return voxel;
+}
+
+/**
+ * A test generator
+ */
+export const TestGen: ChunkGenerator = {
+
+    /**
+     * Gets the tag for this generator
+     * @returns The tag
+     */
+    getTag: () => "test",
+
+    /**
+     * The elevation function
+     * @param worldX The world x coordinate
+     * @param worldZ The world z coordinate
+     * @param chunkX The chunk x coordinate
+     * @param chunkZ The chunk z coordinate
+     */
+    getElevation: (worldX: number, worldZ: number, chunkX: number, chunkZ: number): number => {
+        return 1
+    },
+
+    /**
+     * Gets the function to actually get voxels
+     * @param engine The engine reference
+     */
+    getVoxelFunction: (
+        engine: Engine
+     ): VoxelFunction => {
+        const rVal = (
+            worldX: number, worldY: number, worldZ: number,
+            chunkX: number, chunkY: number, chunkZ: number,
+            stride: number,
+            surfaceHeight: number,
+            surfaceBiome: BiomeData
+        ): GeneratedVoxel => {
+            let rVal: GeneratedVoxel = {
+                type: 0,
+                weight: -1,
+            }
+
+            const realX = voxelToReal(chunkX,worldX)
+            const realY = voxelToReal(chunkY,worldY)
+            const realZ = voxelToReal(chunkZ,worldZ)
+            const strideMultiplier = engine.classes.math.static.pow(2,stride)
+            // const strideMultiplier = 1
+            const heightDiff = realY - surfaceHeight
+            const surfacePercent = (surfaceHeight - realY) / strideMultiplier
+
+            if(heightDiff < -strideMultiplier){
+                return getSubsurfaceVoxel(
+                    rVal,
+                    worldX, worldY, worldZ,
+                    chunkX, chunkY, chunkZ,
+                    realX, realY, realZ,
+                    surfacePercent,
+                    surfaceHeight,
+                    surfaceBiome
+                );
+            } else if(heightDiff > 0) {
+                return getOverSurfaceVoxel(
+                    rVal,
+                    worldX, worldY, worldZ,
+                    chunkX, chunkY, chunkZ,
+                    realX, realY, realZ,-
+                    surfacePercent,
+                    surfaceHeight,
+                    surfaceBiome
+                );
+            } else {
+                return getSurfaceVoxel(
+                    rVal,
+                    worldX, worldY, worldZ,
+                    chunkX, chunkY, chunkZ,
+                    realX, realY, realZ,
+                    surfacePercent,
+                    surfaceHeight,
+                    surfaceBiome
+                );
+            }
+        }
+        return rVal
+    },
+
+}

assets/Scripts/types/engine.ts

@@ -1,5 +1,6 @@
 import { HookManager } from "/Scripts/engine/hooks/hook-manager";
 import { SceneLoader } from "/Scripts/engine/scene/scene-loader";
+import { ChunkGeneratorManager } from "/Scripts/server/chunk/chunkgeneratormanager";
 import { SingletonsMap } from "/Scripts/types/host/singletons";
 import { StaticClasses } from "/Scripts/types/host/static-classes";
 
@@ -29,5 +30,10 @@ export interface Engine {
      */
     readonly sceneLoader: SceneLoader,
 
+    /**
+     * The chunk generator manager
+     */
+    readonly chunkGeneratorManager: ChunkGeneratorManager,
+
 }
 

assets/Scripts/types/host/server/chunk/chunkgenerator.ts

@@ -0,0 +1,95 @@
+import { Engine } from "/Scripts/types/engine";
+import { BiomeData } from "/Scripts/types/host/server/data/biomedata";
+
+
+/**
+ * The width of a chunk
+ */
+export const CHUNK_WIDTH = 16;
+
+/**
+ * A voxel generated by a ChunkGenerator
+ */
+export interface GeneratedVoxel {
+
+    /**
+     * The id of the voxel type
+     */
+    type: number,
+
+    /**
+     * The weight of the voxel
+     */
+    weight: number,
+}
+
+/**
+* Gets a voxel for a given position
+* @param worldX The world x coordinate of the chunk
+* @param worldY The world y coordinate of the chunk
+* @param worldZ The world z coordinate of the chunk
+* @param chunkX The chunk x coordinate
+* @param chunkY The chunk y coordinate
+* @param chunkZ The chunk z coordinate
+* @param stride The stride of the data (this is used for LOD, it ranges 0->4 with 0 being the highest level of detail and 4 being the lowest)
+* @param surfaceHeight The height of the surface at the given x,z coordinate
+* @param terrainModel The terrain model
+* @param surfaceBiome The surface biome
+* @returns The voxel at the provided position
+*/
+export type VoxelFunction = (
+    worldX: number, worldY: number, worldZ: number,
+    chunkX: number, chunkY: number, chunkZ: number,
+    stride: number,
+    surfaceHeight: number,
+    surfaceBiome: BiomeData
+) => GeneratedVoxel;
+
+
+
+/**
+* Gets a chunk for a given world position
+* @param worldX The world x coordinate of the chunk
+* @param worldY The world y coordinate of the chunk
+* @param worldZ The world z coordinate of the chunk
+* @param stride The stride of the data (this is used for LOD, it ranges 0->4 with 0 being the highest level of detail and 4 being the lowest)
+* @param surfaceHeight The height of the surface at the given x,z coordinate
+* @param terrainModel The terrain model
+* @param surfaceBiome The surface biome
+* @returns The voxel at the provided position
+*/
+export type ChunkFunction = (
+    worldX: number, worldY: number, worldZ: number,
+    chunkX: number, chunkY: number, chunkZ: number,
+    stride: number,
+    surfaceHeight: number,
+    surfaceBiome: BiomeData
+) => number[][][];
+
+/**
+ * A chunk generator
+ */
+export interface ChunkGenerator {
+
+    /**
+     * Gets the tag for this generator
+     * @returns The tag
+     */
+    getTag: () => string
+
+    /**
+     * Retrieves the elevation for the world at a given x,z coordinate
+     * @param worldX The world x coordinate
+     * @param worldZ The world z coordinate
+     * @param chunkX The x coordinate of the chunk within the specified world coordinate
+     * @param chunkZ The z coordinate of the chunk within the specified world coordinate
+     * @returns The elevation at that specific position
+     */
+    getElevation: (worldX: number, worldZ: number, chunkX: number, chunkZ: number) => number
+
+    /**
+     * The function to get a voxel for a given position
+     */
+    getVoxelFunction: (engine: Engine) => VoxelFunction
+
+}

assets/Scripts/types/host/server/data/biomedata.ts

@@ -0,0 +1,95 @@
+
+
+/**
+ * Describes a type of foliage that can be generated in a biome
+ */
+export interface BiomeFoliageDescription {
+
+    /**
+     * The list of entity IDs in the type
+     */
+    entityIDs: string[],
+
+    /**
+     * How regular the placement of the foliage is.
+     * Low values make the placement more random.
+     * High values make the placement more orderly (aligned with a grid).
+     */
+    regularity: number,
+
+    /**
+     * The percentage of the ground to cover with foliage
+     */
+    threshold: number,
+
+    /**
+     * The priority of this type in particular
+     */
+    priority: number,
+
+    /**
+     * The scale of the noise used to place foliage
+     */
+    scale: number,
+
+}
+
+/**
+ * The parameters for generating the surface of a biome
+ */
+export interface BiomeSurfaceGenerationParams {
+
+    /**
+     * The tag for the generation algorithm to generate the surface of the biome
+     */
+    surfaceGenTag: string,
+
+    /**
+     * The offset added to the generated heightfield to get the final height of the surface at a given position.
+     * This is most useful for cases like plateaus where you really want to put the surface noise higher than its surroundings.
+     */
+    heightOffset: number,
+
+    /**
+     * The different foliage types that can be generated on this surface
+     */
+    foliageDescriptions: BiomeFoliageDescription[],
+
+}
+
+/**
+ * Biome data
+ */
+export interface BiomeData {
+
+    /**
+     * The id of the biome type
+     */
+    id: string,
+
+    /**
+     * The display name of the biome
+     */
+    displayName: string,
+
+    /**
+     * True if this is an aerial biome
+     */
+    isAerial: boolean,
+
+    /**
+     * True if this is a surface biome
+     */
+    isSurface: boolean,
+
+    /**
+     * True if this is a subterranean biome
+     */
+    isSubterranean: boolean,
+
+    /**
+     * The parameters for generating the surface of this biome
+     */
+    surfaceGenerationParams: BiomeSurfaceGenerationParams,
+
+}

assets/Scripts/types/host/static-classes.ts

@@ -46,6 +46,11 @@ export interface StaticClasses {
      */
     readonly levelEditorUtils?: Class<ClientLevelEditorUtils>,
 
+    /**
+     * Math functions
+     */
+    readonly math?: Class<Math>
+
 }
 
 /**

assets/Scripts/types/host/util/mathutils.ts

@@ -0,0 +1,14 @@
+/**
+ * Math functions
+ */
+export interface Math {
+
+    /**
+     * Computes an arbitrary power of a number
+     * @param num1 The number
+     * @param num2 The power
+     * @returns The result of the power
+     */
+    readonly pow: (num1: number, num2: number) => number
+
+}

docs/src/progress/renderertodo.md

@@ -963,6 +963,15 @@ Fix foliage rendering
 Fix async physics gen on client
 Convert volumetric + shadow pass to entity tags
 
+(11/09/2024)
+Fix eighth res chunk radius
+Fix chunk gen debug ui regenerate button
+Script-defined chunk generators
+Script engine synchronization utility
+Convert ScriptEngine to service
+ScriptEngine full re-initialization signal
+Add surface width to test generator
+
 
 # TODO
 

src/main/java/electrosphere/client/script/ClientScriptUtils.java

@@ -14,9 +14,11 @@ public class ClientScriptUtils {
      * @param args The arguments provided alongside the signal
      */
     public static void fireSignal(String signalName, Object ... args){
-        if(Globals.scriptEngine != null && Globals.scriptEngine.isInitialized()){
-            Globals.scriptEngine.fireSignal(signalName, ScriptEngine.GLOBAL_SCENE, args);
-        }
+        Globals.scriptEngine.executeSynchronously(() -> {
+            if(Globals.scriptEngine != null && Globals.scriptEngine.isInitialized()){
+                Globals.scriptEngine.fireSignal(signalName, ScriptEngine.GLOBAL_SCENE, args);
+            }
+        });
     }
     
 }

src/main/java/electrosphere/client/terrain/cache/ClientTerrainCache.java

@@ -97,6 +97,9 @@ public class ClientTerrainCache {
         this.cacheList.clear();
         this.cacheMapFullRes.clear();
         this.cacheMapHalfRes.clear();
+        this.cacheMapQuarterRes.clear();
+        this.cacheMapEighthRes.clear();
+        this.cacheMapSixteenthRes.clear();
         this.chunkPositionMap.clear();
         lock.release();
     }

src/main/java/electrosphere/client/terrain/cells/ClientDrawCellManager.java

@@ -98,6 +98,11 @@ public class ClientDrawCellManager {
      */
     Map<FloatingChunkTreeNode<DrawCell>,Boolean> evaluationMap = new HashMap<FloatingChunkTreeNode<DrawCell>,Boolean>();
 
+    /**
+     * All draw cells currently tracked
+     */
+    List<DrawCell> activeCells = new LinkedList<DrawCell>();
+
     /**
      * Tracks whether the cell manager updated last frame or not
      */
@@ -227,6 +232,7 @@ public class ClientDrawCellManager {
                     child.getMinBound().z
                 );
                 DrawCell drawCell = DrawCell.generateTerrainCell(cellWorldPos);
+                activeCells.add(drawCell);
                 child.convertToLeaf(drawCell);
                 evaluationMap.put(child,true);
             });
@@ -246,6 +252,7 @@ public class ClientDrawCellManager {
 
             //do creations
             DrawCell drawCell = DrawCell.generateTerrainCell(node.getMinBound());
+            activeCells.add(drawCell);
             newLeaf.convertToLeaf(drawCell);
 
             //update neighbors
@@ -544,7 +551,7 @@ public class ClientDrawCellManager {
             (
                 node.getLevel() == this.chunkTree.getMaxLevel() - EIGHTH_RES_LOD
                 &&
-                this.getMinDistance(pos, node) <= EIGHTH_RES_DIST
+                this.getMinDistance(pos, node) <= SIXTEENTH_RES_DIST
             )
             ||
             (
@@ -591,7 +598,7 @@ public class ClientDrawCellManager {
             (
                 node.getLevel() == this.chunkTree.getMaxLevel() - EIGHTH_RES_LOD
                 &&
-                this.getMinDistance(pos, node) <= EIGHTH_RES_DIST
+                this.getMinDistance(pos, node) <= SIXTEENTH_RES_DIST
             )
             ||
             (
@@ -631,6 +638,7 @@ public class ClientDrawCellManager {
             node.getChildren().forEach(child -> recursivelyDestroy(child));
         }
         if(node.getData() != null){
+            activeCells.remove(node.getData());
             node.getData().destroy();
         }
     }
@@ -659,6 +667,7 @@ public class ClientDrawCellManager {
      * Evicts all cells
      */
     public void evictAll(){
+        this.recursivelyDestroy(this.chunkTree.getRoot());
         this.chunkTree.clear();
     }
 

src/main/java/electrosphere/client/ui/menu/debug/ImGuiTestGen.java

@@ -1,6 +1,7 @@
 package electrosphere.client.ui.menu.debug;
 
 import electrosphere.engine.Globals;
+import electrosphere.engine.signal.Signal.SignalType;
 import electrosphere.renderer.ui.imgui.ImGuiWindow;
 import electrosphere.renderer.ui.imgui.ImGuiWindow.ImGuiWindowCallback;
 import electrosphere.server.datacell.GriddedDataCellManager;
@@ -45,10 +46,19 @@ public class ImGuiTestGen {
 
                 //regenerate the test area
                 if(ImGui.button("Regenerate")){
-                    GriddedDataCellManager gridManager = (GriddedDataCellManager)Globals.realmManager.first().getDataCellManager();
-                    gridManager.evictAll();
-                    Globals.clientDrawCellManager.evictAll();
-                    Globals.clientTerrainManager.evictAll();
+                    //recompile script engine
+                    Globals.signalSystem.post(SignalType.SCRIPT_RECOMPILE, () -> {
+
+                        //run once script recompilation has completed
+
+                        //clear server
+                        GriddedDataCellManager gridManager = (GriddedDataCellManager)Globals.realmManager.first().getDataCellManager();
+                        gridManager.evictAll();
+
+                        //clear client
+                        Globals.clientDrawCellManager.evictAll();
+                        Globals.clientTerrainManager.evictAll();
+                    });
                 }
 
                 //set macro data scale in terrain model
@@ -82,7 +92,7 @@ public class ImGuiTestGen {
                 }
 
                 //Toggles whether the client draws cell manager should update or not
-                if(ImGui.button("Toggle ClientDrawCellManager updates")){
+                if(ImGui.button("Toggle ClientDrawCellManager updates " + (Globals.clientDrawCellManager.getShouldUpdate() ? "off" : "on"))){
                     Globals.clientDrawCellManager.setShouldUpdate(!Globals.clientDrawCellManager.getShouldUpdate());
                 }
                 

src/main/java/electrosphere/engine/Globals.java

@@ -481,8 +481,6 @@ public class Globals {
         skyboxColors = new ArrayList<Vector3f>();
         //load asset manager
         assetManager = new AssetManager();
-        //script engine
-        scriptEngine = new ScriptEngine();
         //ai manager
         aiManager = new AIManager(0);
         //realm & data cell manager
@@ -526,6 +524,7 @@ public class Globals {
         Globals.signalSystem = (SignalSystem)serviceManager.registerService(new SignalSystem());
         Globals.elementService = (ElementService)serviceManager.registerService(new ElementService());
         Globals.particleService = (ParticleService)serviceManager.registerService(new ParticleService());
+        Globals.scriptEngine = (ScriptEngine)serviceManager.registerService(new ScriptEngine());
         serviceManager.instantiate();
         //
         //End service manager
@@ -537,6 +536,7 @@ public class Globals {
         Globals.signalSystem.registerService(SignalType.YOGA_DESTROY, Globals.elementService);
         Globals.signalSystem.registerService(SignalType.UI_MODIFICATION, Globals.elementService);
         Globals.signalSystem.registerService(SignalType.RENDERING_ENGINE_READY, Globals.particleService);
+        Globals.signalSystem.registerService(SignalType.SCRIPT_RECOMPILE, Globals.scriptEngine);
 
 
     }

src/main/java/electrosphere/engine/Main.java

@@ -291,7 +291,13 @@ public class Main {
                 RenderingEngine.recaptureIfNecessary();
                 Globals.profiler.endCpuSample();
             }
-            
+
+
+            ///
+            ///    S Y N C H R O N O U S      S I G N A L      H A N D L I N G
+            ///
+            Globals.scriptEngine.handleAllSignals();
+
             
             ///
             ///

src/main/java/electrosphere/engine/loadingthreads/ChunkGenerationTestLoading.java

@@ -14,6 +14,7 @@ import electrosphere.net.parser.net.message.TerrainMessage;
 import electrosphere.net.server.ServerConnectionHandler;
 import electrosphere.renderer.ui.elements.Window;
 import electrosphere.server.saves.SaveUtils;
+import electrosphere.server.terrain.generation.TestGenerationChunkGenerator;
 
 /**
  * Loads the chunk generation testing realm
@@ -42,6 +43,17 @@ public class ChunkGenerationTestLoading {
             loadingWindow.setVisible(true);
         });
 
+        //wait on script engine to load
+        if(TestGenerationChunkGenerator.DEFAULT_USE_JAVASCRIPT){
+            WindowUtils.updateLoadingWindow("Waiting on scripting engine");
+            while(!Globals.scriptEngine.isInitialized()){
+                try {
+                    TimeUnit.MILLISECONDS.sleep(1);
+                } catch (InterruptedException ex) {}
+            }
+            WindowUtils.updateLoadingWindow("LOADING");
+        }
+
 
 
         String saveName = "generation_testing";

src/main/java/electrosphere/engine/loadingthreads/EngineInitLoading.java

@@ -11,7 +11,7 @@ public class EngineInitLoading {
      * Loads the core assets of the scripting engine from disk and initializes the engine
      */
     protected static void loadScriptingEngine(Object[] params){
-        Globals.scriptEngine.init();
+        Globals.scriptEngine.initScripts();
     }
 
 }

src/main/java/electrosphere/engine/signal/Signal.java

@@ -37,6 +37,11 @@ public class Signal {
         REQUEST_CHUNK_EDIT,
         CHUNK_EDITED,
 
+        //
+        //Script
+        //
+        SCRIPT_RECOMPILE,
+
     }
 
     /**

src/main/java/electrosphere/entity/scene/SceneLoader.java

@@ -124,8 +124,11 @@ public class SceneLoader {
         }
         //load scripts
         if(!isLevelEditor && file.getInitScriptPath() != null){
-            int sceneInstanceId = Globals.scriptEngine.initScene(file.getInitScriptPath());
-            realm.setSceneInstanceId(sceneInstanceId);
+            Realm finalRealm = realm;
+            Globals.scriptEngine.executeSynchronously(() -> {
+                int sceneInstanceId = Globals.scriptEngine.initScene(file.getInitScriptPath());
+                finalRealm.setSceneInstanceId(sceneInstanceId);
+            });
         }
         //TODO: integrate scripts for client side of scenes
         // for(String scriptPath : file.getScriptPaths()){

src/main/java/electrosphere/game/data/biome/BiomeData.java

@@ -2,6 +2,8 @@ package electrosphere.game.data.biome;
 
 import java.util.List;
 
+import org.graalvm.polyglot.HostAccess.Export;
+
 /**
  * Data about a given biome
  */
@@ -10,11 +12,13 @@ public class BiomeData {
     /**
      * The id of the biome
      */
+    @Export
     String id;
 
     /**
      * The display name of the biome
      */
+    @Export
     String displayName;
 
     /**
@@ -25,21 +29,25 @@ public class BiomeData {
     /**
      * True if this region applies above the surface
      */
+    @Export
     Boolean isAerial;
 
     /**
      * True if this region applies to the surface
      */
+    @Export
     Boolean isSurface;
 
     /**
      * True if this region applies below the surface
      */
+    @Export
     Boolean isSubterranean;
 
     /**
      * The surface generation params
      */
+    @Export
     BiomeSurfaceGenerationParams surfaceGenerationParams;
 
     

src/main/java/electrosphere/game/data/biome/BiomeFoliageDescription.java

@@ -2,34 +2,41 @@ package electrosphere.game.data.biome;
 
 import java.util.List;
 
+import org.graalvm.polyglot.HostAccess.Export;
+
 /**
  * Describes behavior for spawning a specific type of foliage in the biome
  */
 public class BiomeFoliageDescription {
     
     /**
-     * The liust of entity IDs of this foliage type in particular
+     * The list of entity IDs of this foliage type in particular
      */
+    @Export
     List<String> entityIDs;
 
     /**
      * How regular the placement of foliage is. Low values will create very uneven foliage, while high values will place them along a grid.
      */
+    @Export
     Double regularity;
 
     /**
      * The percentage of the ground to cover with foliage
      */
+    @Export
     Double threshold;
 
     /**
      * The priority of this floor element in particular
      */
+    @Export
     Double priority;
 
     /**
      * The scale of the noise used to place foliage
      */
+    @Export
     Double scale;
 
     /**

src/main/java/electrosphere/game/data/biome/BiomeSurfaceGenerationParams.java

@@ -2,6 +2,8 @@ package electrosphere.game.data.biome;
 
 import java.util.List;
 
+import org.graalvm.polyglot.HostAccess.Export;
+
 /**
  * Params for the surface generation algorithm
  */
@@ -10,11 +12,13 @@ public class BiomeSurfaceGenerationParams {
     /**
      * The tag for the generation algorithm for generating the surface
      */
+    @Export
     String surfaceGenTag;
 
     /**
      * The offset from baseline for height generation with this biome
      */
+    @Export
     Float heightOffset;
 
     /**
@@ -25,6 +29,7 @@ public class BiomeSurfaceGenerationParams {
     /**
      * The list of foliage descriptions available to this biome type
      */
+    @Export
     List<BiomeFoliageDescription> foliageDescriptions;
 
     /**

src/main/java/electrosphere/game/server/world/ServerWorldData.java

@@ -153,7 +153,7 @@ public class ServerWorldData {
 
         //test terrain gen
         {
-            TestGenerationChunkGenerator chunkGen = new TestGenerationChunkGenerator(serverWorldData);
+            TestGenerationChunkGenerator chunkGen = new TestGenerationChunkGenerator(serverWorldData, TestGenerationChunkGenerator.DEFAULT_USE_JAVASCRIPT);
             serverTerrainManager = new ServerTerrainManager(serverWorldData, 0, chunkGen);
             serverTerrainManager.genTestData(chunkGen);
         }

src/main/java/electrosphere/script/ScriptEngine.java

@@ -4,6 +4,7 @@ import java.io.File;
 import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.concurrent.locks.ReentrantLock;
 
 import org.graalvm.polyglot.Context;
 import org.graalvm.polyglot.Engine;
@@ -19,15 +20,18 @@ import electrosphere.client.ui.menu.script.ScriptMenuUtils;
 import electrosphere.client.ui.menu.tutorial.TutorialMenus;
 import electrosphere.engine.Globals;
 import electrosphere.engine.Main;
+import electrosphere.engine.signal.Signal;
+import electrosphere.engine.signal.SignalServiceImpl;
 import electrosphere.logger.LoggerInterface;
 import electrosphere.script.translation.JSServerUtils;
+import electrosphere.script.utils.ScriptMathInterface;
 import electrosphere.util.FileUtils;
 import electrosphere.util.math.SpatialMathUtils;
 
 /**
  * Interface for executing scripts in the game engine
  */
-public class ScriptEngine {
+public class ScriptEngine extends SignalServiceImpl {
 
     //the default namespaces for 
     public static String SCRIPT_NAMESPACE_ENGINE = "engine"; //namespace for the engine functions exposed to the script engine
@@ -67,6 +71,11 @@ public class ScriptEngine {
      */
     boolean initialized = false;
 
+    /**
+     * Locks the script engine to enforce synchronization
+     */
+    ReentrantLock lock = new ReentrantLock();
+
     //The files that are loaded on init to bootstrap the script engine
     static final String[] filesToLoadOnInit = new String[]{
         //polyfills
@@ -98,6 +107,7 @@ public class ScriptEngine {
         {"menuUtils",ScriptMenuUtils.class},
         {"voxelUtils",ScriptClientVoxelUtils.class},
         {"levelEditorUtils",ScriptLevelEditorUtils.class},
+        {"math",ScriptMathInterface.class},
     };
 
     //singletons from the host that are provided to the javascript context
@@ -107,10 +117,18 @@ public class ScriptEngine {
         {"loggerScripts",LoggerInterface.loggerScripts},
     };
 
+
+    /**
+     * Constructor
+     */
+    public ScriptEngine(){
+        super("ScriptEngine");
+    }
+
     /**
      * Initializes the engine
      */
-    public void init(){
+    public void initScripts(){
         //init datastructures
         sourceMap = new HashMap<String,Source>();
         initialized = false;
@@ -320,6 +338,22 @@ public class ScriptEngine {
         invokeMemberFunction("COMPILER", "run");
     }
 
+    /**
+     * Recompiles the scripting engine
+     */
+    private void recompile(Runnable onCompletion){
+        Thread recompileThread = new Thread(() -> {
+            Globals.scriptEngine.executeSynchronously(() -> {
+                this.initScripts();
+            });
+            if(onCompletion != null){
+                onCompletion.run();
+            }
+        });
+        recompileThread.setName("Recompile Script Engine");
+        recompileThread.start();
+    }
+
     /**
      * Initializes a scene script
      * @param scenePath The scene's init script path
@@ -398,6 +432,40 @@ public class ScriptEngine {
         invokeFunction("require", filePath);
     }
 
+    /**
+     * Invokes a function on a member of arbitrary depth on the engine object
+     * @param memberName The member name
+     * @param functionName The function's name
+     * @param className The class of the expected return value
+     * @param args The args to pass to the function
+     * @return The results of the invocation or null if there was no result
+     */
+    public Value invokeEngineMember(String memberName, String functionName,  Object ... args){
+        Value member = this.engineObject.getMember(memberName);
+        if(member == null){
+            throw new Error("Member is null!");
+        }
+        Value function = member.getMember(functionName);
+        if(function == null || !function.canExecute()){
+            throw new Error("Function is not executable! " + function);
+        }
+        Value executionResult = function.execute(args);
+        if(executionResult == null){
+            return null;
+        }
+        return executionResult;
+    }
+
+    /**
+     * Executes some code synchronously that requires script engine access
+     * @param function The function
+     */
+    public void executeSynchronously(Runnable function){
+        lock.lock();
+        function.run();
+        lock.unlock();
+    }
+
     /**
      * Defines host members within javascript context
      */
@@ -431,5 +499,23 @@ public class ScriptEngine {
         return this.initialized;
     }
     
+
+    @Override
+    public boolean handle(Signal signal){
+        boolean rVal = false;
+        switch(signal.getType()){
+            case SCRIPT_RECOMPILE: {
+                if(signal.getData() != null && signal.getData() instanceof Runnable){
+                    this.recompile((Runnable)signal.getData());
+                } else {
+                    this.recompile(null);
+                }
+                rVal = true;
+            } break;
+            default: {
+            } break;
+        }
+        return rVal;
+    }
     
 }

src/main/java/electrosphere/script/utils/ScriptMathInterface.java

@@ -0,0 +1,21 @@
+package electrosphere.script.utils;
+
+import org.graalvm.polyglot.HostAccess.Export;
+
+/**
+ * Script access to specific math functions
+ */
+public class ScriptMathInterface {
+    
+    /**
+     * Power function
+     * @param val1 The number
+     * @param val2 The exponent
+     * @return The power
+     */
+    @Export
+    public static double pow(double val1, double val2){
+        return Math.pow(val1,val2);
+    }
+
+}

src/main/java/electrosphere/server/datacell/GriddedDataCellManager.java

@@ -421,9 +421,6 @@ public class GriddedDataCellManager implements DataCellManager, VoxelCellManager
 
     /**
      * Evicts all loaded chunks.
-     * <p>
-     * Note: Does not save to disk.
-     * </p>
      */
     public void evictAll(){
         //TODO: improve to make have less performance impact

src/main/java/electrosphere/server/datacell/Realm.java

@@ -274,11 +274,13 @@ public class Realm {
      */
     public void fireSignal(String signalName, Object ... args){
         if(Globals.scriptEngine != null && Globals.scriptEngine.isInitialized()){
-            if(this.sceneInstanceId != NO_SCENE_INSTANCE){
-                Globals.scriptEngine.fireSignal(signalName, sceneInstanceId, args);
-            } else {
-                Globals.scriptEngine.fireSignal(signalName, ScriptEngine.GLOBAL_SCENE, args);
-            }
+            Globals.scriptEngine.executeSynchronously(() -> {
+                if(this.sceneInstanceId != NO_SCENE_INSTANCE){
+                    Globals.scriptEngine.fireSignal(signalName, sceneInstanceId, args);
+                } else {
+                    Globals.scriptEngine.fireSignal(signalName, ScriptEngine.GLOBAL_SCENE, args);
+                }
+            });
         }
     }
     

src/main/java/electrosphere/server/terrain/generation/TestGenerationChunkGenerator.java

@@ -3,6 +3,8 @@ package electrosphere.server.terrain.generation;
 import java.util.HashMap;
 import java.util.Map;
 
+import org.graalvm.polyglot.Value;
+
 import electrosphere.engine.Globals;
 import electrosphere.game.data.biome.BiomeData;
 import electrosphere.game.data.biome.BiomeSurfaceGenerationParams;
@@ -12,6 +14,7 @@ import electrosphere.server.terrain.generation.heightmap.HeightmapGenerator;
 import electrosphere.server.terrain.generation.heightmap.HillsGen;
 import electrosphere.server.terrain.generation.heightmap.PlainsGen;
 import electrosphere.server.terrain.generation.interfaces.ChunkGenerator;
+import electrosphere.server.terrain.generation.interfaces.GeneratedVoxel;
 import electrosphere.server.terrain.manager.ServerTerrainChunk;
 import electrosphere.server.terrain.models.TerrainModel;
 
@@ -29,6 +32,21 @@ public class TestGenerationChunkGenerator implements ChunkGenerator {
      * The default biome index
      */
     public static final int DEFAULT_BIOME_INDEX = 1;
+
+    /**
+     * The width of the surface in number of voxels
+     */
+    public static final int SURFACE_VOXEL_WIDTH = 2;
+
+    /**
+     * Tag for the test generator
+     */
+    public static final String SCRIPT_GEN_TEST_TAG = "test";
+
+    /**
+     * Controls the default setting for whether to use javascript or not
+     */
+    public static final boolean DEFAULT_USE_JAVASCRIPT = false;
     
     /**
      * The terreain model for the generator
@@ -45,14 +63,20 @@ public class TestGenerationChunkGenerator implements ChunkGenerator {
      */
     Map<String,HeightmapGenerator> tagGeneratorMap = new HashMap<String,HeightmapGenerator>();
 
+    /**
+     * Tracks whether to use javascript generation or not
+     */
+    boolean useJavascript = false;
+
     /**
      * Constructor
      */
-    public TestGenerationChunkGenerator(ServerWorldData serverWorldData){
+    public TestGenerationChunkGenerator(ServerWorldData serverWorldData, boolean useJavascript){
         this.serverWorldData = serverWorldData;
         registerGenerator(new EmptySkyGen());
         registerGenerator(new HillsGen());
         registerGenerator(new PlainsGen());
+        this.useJavascript = useJavascript;
     }
 
     /**
@@ -101,22 +125,61 @@ public class TestGenerationChunkGenerator implements ChunkGenerator {
                 }
             }
 
-            for(int x = 0; x < ServerTerrainChunk.CHUNK_DIMENSION; x++){
-                Globals.profiler.beginAggregateCpuSample("TestGenerationChunkGenerator - Generate slice");
-                for(int y = 0; y < ServerTerrainChunk.CHUNK_DIMENSION; y++){
-                    for(int z = 0; z < ServerTerrainChunk.CHUNK_DIMENSION; z++){
-                        int finalWorldX = worldX + ((x * strideValue) / ServerTerrainChunk.CHUNK_DIMENSION);
-                        int finalWorldY = worldY + ((y * strideValue) / ServerTerrainChunk.CHUNK_DIMENSION);
-                        int finalWorldZ = worldZ + ((z * strideValue) / ServerTerrainChunk.CHUNK_DIMENSION);
-                        int finalChunkX = (x * strideValue) % ServerTerrainChunk.CHUNK_DIMENSION;
-                        int finalChunkY = (y * strideValue) % ServerTerrainChunk.CHUNK_DIMENSION;
-                        int finalChunkZ = (z * strideValue) % ServerTerrainChunk.CHUNK_DIMENSION;
-                        GeneratedVoxel voxel = this.getVoxel(finalWorldX, finalWorldY, finalWorldZ, finalChunkX, finalChunkY, finalChunkZ, heightfield[x][z], this.terrainModel, surfaceBiome);
-                        weights[x][y][z] = voxel.weight;
-                        values[x][y][z] = voxel.type;
+            if(this.useJavascript){
+                Globals.scriptEngine.executeSynchronously(() -> {
+                    Value getVoxelFunc = Globals.scriptEngine.invokeEngineMember("chunkGeneratorManager", "getVoxelFunction", SCRIPT_GEN_TEST_TAG);
+                    for(int x = 0; x < ServerTerrainChunk.CHUNK_DIMENSION; x++){
+                        Globals.profiler.beginAggregateCpuSample("TestGenerationChunkGenerator - Generate slice");
+                        for(int y = 0; y < ServerTerrainChunk.CHUNK_DIMENSION; y++){
+                            for(int z = 0; z < ServerTerrainChunk.CHUNK_DIMENSION; z++){
+                                int finalWorldX = worldX + ((x * strideValue) / ServerTerrainChunk.CHUNK_DIMENSION);
+                                int finalWorldY = worldY + ((y * strideValue) / ServerTerrainChunk.CHUNK_DIMENSION);
+                                int finalWorldZ = worldZ + ((z * strideValue) / ServerTerrainChunk.CHUNK_DIMENSION);
+                                int finalChunkX = (x * strideValue) % ServerTerrainChunk.CHUNK_DIMENSION;
+                                int finalChunkY = (y * strideValue) % ServerTerrainChunk.CHUNK_DIMENSION;
+                                int finalChunkZ = (z * strideValue) % ServerTerrainChunk.CHUNK_DIMENSION;
+                                    Value result = getVoxelFunc.execute(
+                                        finalWorldX, finalWorldY, finalWorldZ,
+                                        finalChunkX, finalChunkY, finalChunkZ,
+                                        stride,
+                                        heightfield[x][z],
+                                        surfaceBiome
+                                    );
+                                    if(result != null){
+                                        weights[x][y][z] = result.getMember("weight").asFloat();
+                                        values[x][y][z] = result.getMember("type").asInt();
+                                    }
+                            }
+                        }
+                        Globals.profiler.endCpuSample();
                     }
+                });
+            } else {
+                for(int x = 0; x < ServerTerrainChunk.CHUNK_DIMENSION; x++){
+                    Globals.profiler.beginAggregateCpuSample("TestGenerationChunkGenerator - Generate slice");
+                    for(int y = 0; y < ServerTerrainChunk.CHUNK_DIMENSION; y++){
+                        for(int z = 0; z < ServerTerrainChunk.CHUNK_DIMENSION; z++){
+                            int finalWorldX = worldX + ((x * strideValue) / ServerTerrainChunk.CHUNK_DIMENSION);
+                            int finalWorldY = worldY + ((y * strideValue) / ServerTerrainChunk.CHUNK_DIMENSION);
+                            int finalWorldZ = worldZ + ((z * strideValue) / ServerTerrainChunk.CHUNK_DIMENSION);
+                            int finalChunkX = (x * strideValue) % ServerTerrainChunk.CHUNK_DIMENSION;
+                            int finalChunkY = (y * strideValue) % ServerTerrainChunk.CHUNK_DIMENSION;
+                            int finalChunkZ = (z * strideValue) % ServerTerrainChunk.CHUNK_DIMENSION;
+                            GeneratedVoxel voxel = this.getVoxel(
+                                finalWorldX, finalWorldY, finalWorldZ,
+                                finalChunkX, finalChunkY, finalChunkZ,
+                                stride,
+                                heightfield[x][z],
+                                surfaceBiome
+                            );
+                            if(voxel != null){
+                                weights[x][y][z] = voxel.weight;
+                                values[x][y][z] = voxel.type;
+                            }
+                        }
+                    }
+                    Globals.profiler.endCpuSample();
                 }
-                Globals.profiler.endCpuSample();
             }
         } catch(Exception ex){
             ex.printStackTrace();
@@ -156,16 +219,16 @@ public class TestGenerationChunkGenerator implements ChunkGenerator {
      * @param chunkX The chunk x pos
      * @param chunkY The chunk y pos
      * @param chunkZ The chunk z pos
+     * @param stride The stride of the data
      * @param surfaceHeight The height of the surface at x,z
-     * @param terrainModel The terrain model
      * @param surfaceBiome The surface biome of the chunk
      * @return The value of the chunk
      */
     private GeneratedVoxel getVoxel(
         int worldX, int worldY, int worldZ,
         int chunkX, int chunkY, int chunkZ,
+        int stride,
         float surfaceHeight,
-        TerrainModel terrainModel,
         BiomeData surfaceBiome
     ){
         Globals.profiler.beginAggregateCpuSample("TestGenerationChunkGenerator.getChunkValue");
@@ -179,24 +242,26 @@ public class TestGenerationChunkGenerator implements ChunkGenerator {
         double realY = this.serverWorldData.convertVoxelToRealSpace(chunkY,worldY);
         double realZ = this.serverWorldData.convertVoxelToRealSpace(chunkZ,worldZ);
 
-        double flooredSurfaceHeight = Math.floor(surfaceHeight);
+        double strideMultiplier = Math.pow(2,stride);
+        double heightDiff = realY - surfaceHeight;
+        double surfacePercent = TestGenerationChunkGenerator.getSurfaceWeight(surfaceHeight,realY,strideMultiplier);
         Globals.profiler.endCpuSample();
-        if(realY < surfaceHeight - 1){
+        if(heightDiff < -strideMultiplier * SURFACE_VOXEL_WIDTH){
             return getSubsurfaceVoxel(
                 worldX, worldY, worldZ,
                 chunkX, chunkY, chunkZ,
                 realX, realY, realZ,
-                surfaceHeight, flooredSurfaceHeight,
-                terrainModel,
+                surfacePercent,
+                surfaceHeight,
                 surfaceBiome
             );
-        } else if(realY > flooredSurfaceHeight) {
+        } else if(heightDiff > 0) {
             return getOverSurfaceVoxel(
                 worldX, worldY, worldZ,
                 chunkX, chunkY, chunkZ,
-                realX, realY, realZ,
-                surfaceHeight, flooredSurfaceHeight,
-                terrainModel,
+                realX, realY, realZ,-
+                surfacePercent,
+                surfaceHeight,
                 surfaceBiome
             );
         } else {
@@ -204,8 +269,8 @@ public class TestGenerationChunkGenerator implements ChunkGenerator {
                 worldX, worldY, worldZ,
                 chunkX, chunkY, chunkZ,
                 realX, realY, realZ,
-                surfaceHeight, flooredSurfaceHeight,
-                terrainModel,
+                surfacePercent,
+                surfaceHeight,
                 surfaceBiome
             );
         }
@@ -219,12 +284,12 @@ public class TestGenerationChunkGenerator implements ChunkGenerator {
         int worldX, int worldY, int worldZ,
         int chunkX, int chunkY, int chunkZ,
         double realX, double realY, double realZ,
-        float surfaceHeight, double flooredSurfaceHeight,
-        TerrainModel terrainModel,
+        double surfacePercent,
+        float surfaceHeight,
         BiomeData surfaceBiome
     ){
         GeneratedVoxel voxel = new GeneratedVoxel();
-        voxel.weight = (float)(surfaceHeight - flooredSurfaceHeight) * 2 - 1;
+        voxel.weight = (float)surfacePercent * 2 - 1;
         voxel.type = 2;
         return voxel;
     }
@@ -237,8 +302,8 @@ public class TestGenerationChunkGenerator implements ChunkGenerator {
         int worldX, int worldY, int worldZ,
         int chunkX, int chunkY, int chunkZ,
         double realX, double realY, double realZ,
-        float surfaceHeight, double flooredSurfaceHeight,
-        TerrainModel terrainModel,
+        double surfacePercent,
+        float surfaceHeight,
         BiomeData surfaceBiome
     ){
         GeneratedVoxel voxel = new GeneratedVoxel();
@@ -260,8 +325,8 @@ public class TestGenerationChunkGenerator implements ChunkGenerator {
         int worldX, int worldY, int worldZ,
         int chunkX, int chunkY, int chunkZ,
         double realX, double realY, double realZ,
-        float surfaceHeight, double flooredSurfaceHeight,
-        TerrainModel terrainModel,
+        double surfacePercent,
+        float surfaceHeight,
         BiomeData surfaceBiome
     ){
         GeneratedVoxel voxel = new GeneratedVoxel();
@@ -271,17 +336,14 @@ public class TestGenerationChunkGenerator implements ChunkGenerator {
     }
 
     /**
-     * A voxel that was generated
+     * Calculates the weight of a voxel on the surface based on the surface height, the position of the voxel, and the stride multiplier
+     * @param surfaceHeight The surface height
+     * @param realPosY The position of the voxel
+     * @param strideMultiplier The stride multiplier
+     * @return The weight of the voxel
      */
-    static class GeneratedVoxel {
-        /**
-         * The type of the voxel
-         */
-        int type;
-        /**
-         * The weight of the voxel
-         */
-        float weight;
+    protected static double getSurfaceWeight(double surfaceHeight, double realPosY, double strideMultiplier){
+        return ((surfaceHeight - realPosY) / strideMultiplier);
     }
     
 }

src/main/java/electrosphere/server/terrain/generation/interfaces/GeneratedVoxel.java

@@ -0,0 +1,22 @@
+package electrosphere.server.terrain.generation.interfaces;
+
+import org.graalvm.polyglot.HostAccess.Export;
+
+/**
+ * A voxel generated by a chunk generator
+ */
+public class GeneratedVoxel {
+    
+    /**
+     * The type of the voxel
+     */
+    @Export
+    public int type;
+
+    /**
+     * The weight of the voxel
+     */
+    @Export
+    public float weight;
+
+}

src/main/java/electrosphere/server/terrain/generation/interfaces/JSChunkGenerator.java

@@ -0,0 +1,37 @@
+package electrosphere.server.terrain.generation.interfaces;
+
+import electrosphere.game.data.biome.BiomeData;
+
+/**
+ * A script-defined chunk generator
+ */
+public interface JSChunkGenerator {
+    
+    /**
+     * Gets the tag for this generator
+     * @returns The tag
+     */
+    public String getTag();
+
+    /**
+     * Retrieves the elevation for the world at a given x,z coordinate
+     * @param worldX The world x coordinate
+     * @param worldZ The world z coordinate
+     * @param chunkX The x coordinate of the chunk within the specified world coordinate
+     * @param chunkZ The z coordinate of the chunk within the specified world coordinate
+     * @returns The elevation at that specific position
+     */
+    public float getElevation(int worldX, int worldZ, int chunkX, int chunkZ);
+
+    /**
+     * The function to get a voxel for a given position
+     */
+    public GeneratedVoxel getVoxel(
+        int worldX, int worldY, int worldZ,
+        int chunkX, int chunkY, int chunkZ,
+        int stride,
+        double surfaceHeight,
+        BiomeData surfaceBiome
+    );
+
+}

src/main/java/electrosphere/server/terrain/manager/ServerChunkCache.java

@@ -84,6 +84,9 @@ public class ServerChunkCache {
         lock.acquireUninterruptibly();
         cacheMapFullRes.clear();
         cacheMapHalfRes.clear();
+        cacheMapQuarterRes.clear();
+        cacheMapEighthRes.clear();
+        cacheMapSixteenthRes.clear();
         lock.release();
     }
 

src/test/java/electrosphere/server/terrain/generation/TestGenerationChunkGeneratorTests.java

@@ -0,0 +1,22 @@
+package electrosphere.server.terrain.generation;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import electrosphere.test.annotations.FastTest;
+import electrosphere.test.annotations.UnitTest;
+
+/**
+ * Unit tests for the test generation chunk generator
+ */
+public class TestGenerationChunkGeneratorTests {
+
+    @UnitTest
+    @FastTest
+    public void getSurfaceWeight_ValueTests(){
+        assertEquals(0.5,TestGenerationChunkGenerator.getSurfaceWeight(0.5, 0, 1));
+        assertEquals(0.1,TestGenerationChunkGenerator.getSurfaceWeight(0.1, 0, 1));
+        assertEquals(0.9,TestGenerationChunkGenerator.getSurfaceWeight(0.9, 0, 1));
+        assertEquals(0.95,TestGenerationChunkGenerator.getSurfaceWeight(1.9, 0, 2));
+    }
+    
+}