generation testing menu with regenerate button

docs/src/architecture/generation/terraingenerationprocess.md

@@ -3,7 +3,7 @@
 have a heightmap generated by tectonic sim
 is interpolated to 2000x2000
 saved as a byte per pixel
-this map is used to determine what type of noise to sample from (ie mountain noise vs ocean noise vs plains noise)
+~~~~~this map is used to determine what type of noise to sample from (ie mountain noise vs ocean noise vs plains noise)~~~~~
 generate a separate map for biomes that is also 2000x2000
 this is stored as shorts, where value is the id of the biome
 "civilization" gradient map generated with simplex noise (1byte resolution)

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

@@ -475,6 +475,22 @@ public class DrawCellManager {
         updateable.add(getCellKey(chunkX, chunkY, chunkZ));
     }
 
+    /**
+     * Evicts all chunks
+     */
+    public void evictAll(){
+        //destroy models
+        for(String key : drawable){
+            keyCellMap.get(key).destroy();
+        }
+        keyCellMap.clear();
+        hasNotRequested.clear();
+        requested.clear();
+        drawable.clear();
+        undrawable.clear();
+        updateable.clear();    
+    }
+
 
     /**
      * Gets the radius within which full-detail models are drawn

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

@@ -0,0 +1,48 @@
+package electrosphere.client.ui.menu.debug;
+
+import electrosphere.engine.Globals;
+import electrosphere.renderer.ui.imgui.ImGuiWindow;
+import electrosphere.renderer.ui.imgui.ImGuiWindow.ImGuiWindowCallback;
+import electrosphere.server.datacell.GriddedDataCellManager;
+import imgui.ImGui;
+
+/**
+ * Menu for altering parameters of the test terrain generator
+ */
+public class ImGuiTestGen {
+    
+    //window for viewing information about the ai state
+    protected static ImGuiWindow testGenWindow;
+
+    /**
+     * Creates the windows in this file
+     */
+    protected static void createTestGenWindows(){
+        createTestGenDebugWindow();
+    }
+
+    /**
+     * Client scene entity view
+     */
+    protected static void createTestGenDebugWindow(){
+        testGenWindow = new ImGuiWindow("Test Terrain Generation");
+        testGenWindow.setCallback(new ImGuiWindowCallback() {
+            @Override
+            public void exec() {
+                //ui framework text
+                ImGui.text("Test Terrain Generation");
+
+                //regenerate the test area
+                if(ImGui.button("Regenerate")){
+                    GriddedDataCellManager gridManager = (GriddedDataCellManager)Globals.realmManager.first().getDataCellManager();
+                    gridManager.evictAll();
+                    Globals.drawCellManager.evictAll();
+                }
+                
+            }
+        });
+        testGenWindow.setOpen(false);
+        Globals.renderingEngine.getImGuiPipeline().addImGuiWindow(testGenWindow);
+    }
+
+}

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

@@ -11,6 +11,7 @@ import electrosphere.renderer.ui.imgui.ImGuiWindow;
 import electrosphere.renderer.ui.imgui.ImGuiLinePlot.ImGuiLinePlotDataset;
 import electrosphere.renderer.ui.imgui.ImGuiWindow.ImGuiWindowCallback;
 import electrosphere.server.fluid.manager.ServerFluidManager;
+import electrosphere.server.terrain.generation.TestGenerationChunkGenerator;
 import imgui.ImGui;
 
 /**
@@ -49,6 +50,7 @@ public class ImGuiWindowMacros {
         ImGuiAudio.createAudioDebugMenu();
         ImGuiLogger.createLoggersWindows();
         ImGuiRenderer.createRendererWindows();
+        ImGuiTestGen.createTestGenWindows();
     }
 
     /**
@@ -171,6 +173,16 @@ public class ImGuiWindowMacros {
                 if(ImGui.button("UI")){
                     ImGuiUIFramework.uiFrameworkWindow.setOpen(true);
                 }
+                //test gen window (only drawn if realm is a test generation realm)
+                if(
+                    Globals.realmManager != null &&
+                    Globals.realmManager.first() != null &&
+                    Globals.realmManager.first().getServerWorldData() != null &&
+                    Globals.realmManager.first().getServerWorldData().getServerTerrainManager().getChunkGenerator() instanceof TestGenerationChunkGenerator &&
+                    ImGui.button("Test Terrain Gen")
+                ){
+                    ImGuiTestGen.testGenWindow.setOpen(true);
+                }
                 //close button
                 if(ImGui.button("Close")){
                     mainDebugWindow.setOpen(false);

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

@@ -315,6 +315,37 @@ 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
+        for(ServerDataCell cell : loadedCells){
+            loadedCellsLock.acquireUninterruptibly();
+            int frameCount = cellPlayerlessFrameMap.get(cell) + 1;
+            cellPlayerlessFrameMap.put(cell,frameCount);
+            toCleanQueue.add(cell);
+            loadedCellsLock.release();
+        }
+        for(ServerDataCell cell : toCleanQueue){
+            parent.deregisterCell(cell);
+            loadedCells.remove(cell);
+            Vector3i worldPos = getCellWorldPosition(cell);
+            String key = getServerDataCellKey(worldPos);
+            groundDataCells.remove(key);
+            //offload all entities in cell to chunk file
+            serverContentManager.saveContentToDisk(key, cell.getScene().getEntityList());
+            //clear all entities in cell
+            for(Entity entity : cell.getScene().getEntityList()){
+                ClientEntityUtils.destroyEntity(entity);
+            }
+        }
+        toCleanQueue.clear();
+    }
+
     /**
      * Get data cell at a given real point in this realm
      * @param point The real point

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

@@ -199,6 +199,9 @@ public class RealmManager {
      * @return The first realm in the manager
      */
     public Realm first(){
+        if(realms.size() == 0){
+            return null;
+        }
         return realms.iterator().next();
     }