intelligently place foliage

buildNumber.properties

@@ -1,3 +1,3 @@
 #maven.buildNumber.plugin properties file
-#Sun Mar 10 11:10:27 EDT 2024
-buildNumber=45
+#Tue Mar 12 21:28:50 EDT 2024
+buildNumber=46

docs/src/progress/renderertodo.md

@@ -147,7 +147,9 @@ Overhaul mesh class
 (03/10/2024)
 De-dupe render calls via doing mutations in render pipeline status and dont call setting variables to values they are already set to
 
-
+(03/12/2024)
+Foliage Manager upgrades
+ - Place foliage intelligently
 
 
 
@@ -160,11 +162,6 @@ Fix Frustum Culling for skybox
 
 Clean up main method/class
 
-Build a lod system
- - Could potentially be held at actor level
- - Link different models based on LOD level
- - LOD trees aggressively
-
 
 Fluid Dynamics System
  - Basic transparent voxels for fluid
@@ -174,6 +171,31 @@ Fluid Dynamics System
  - Networked fluid chunk transportation (including force vectors for generating particles on client)
  - Save fluid chunks
 
+Transvoxel Algorithm
+  Client Terrain Entity Management (specifically creation/teardown for client)
+  - Also queries for far out chunks to load far away terrain
+  Server Terrain Management (specifically for collision)
+  - Handles communicating far out LOD chunks to client as well
+  Terrain Interface Positional Access Interface
+  - Ability to get terrain at point for interactions with game world eg placing grass/water collision
+  Actually implement transvoxel algo
+  Marching Cubes Texture Overhaul
+  - Detect opengl max image size
+  - Construct texture atlas of max size
+      - (target 256x256 resolution initially, should give ~1000 types for 8192x8192)
+  - Prebake all textures into atlas
+  - Rewrite marching cubes shader to leverage this atlas
+
+Build a lod system
+ - Could potentially be held at actor level
+ - Link different models based on LOD level
+ - LOD trees aggressively
+
+
+skybox work
+ - make it prettier
+ - be able to manage its colors through a clean interface
+
 Ray Traced Audio Engine
 
 Documentation Pass on as many files as you can stomache
@@ -186,18 +208,11 @@ Generate Tree Entities
 
 Fix Character creation preview not working
 
-Marching Cubes Texture Overhaul
- - Detect opengl max image size
- - Construct texture atlas of max size
-    - (target 256x256 resolution initially, should give ~1000 types for 8192x8192)
- - Prebake all textures into atlas
- - Rewrite marching cubes shader to leverage this atlas
+Fix grass flickering (it's frustum culling being inconsistent, try commenting it out in InstancedActor and see what happens :| )
 
-
-Terrain Interface Positional Access Interface
- - Ability to get terrain at point for interactions with game world eg placing grass/water collision
 Foliage Manager upgrades
- - Place foliage intelligently
+ - Wind system (environment ubi that defines wind that is lookup'd by individual blades)
+
 
 Server Micro/Macro transitioning (turning entity into character in macro simulation and vice-versa)
 Macro level content tracker
@@ -222,13 +237,6 @@ Weather tracking
 Foliage Manager upgrades
  - Add wind simulation if relevant
 
-Client Terrain Entity Management (specifically creation/teardown for client)
- - Also queries for far out chunks to load far away terrain
-Server Terrain Management (specifically for collision)
- - Handles communicating far out LOD chunks to client as well
-Upgrade Terrain Chunk
- - Implement Transvoxel Algorithm
-
 
 
 Server Content Engine

src/main/java/electrosphere/client/foliagemanager/ClientFoliageManager.java

@@ -55,7 +55,7 @@ public class ClientFoliageManager {
     //The maximum number of foliage cells 
     static final int CELL_COUNT_MAX = 100;
     //The target number of foliage to place per cell
-    static final int TARGET_FOLIAGE_PER_CELL = 50;
+    static final int TARGET_FOLIAGE_PER_CELL = 200;
     //Stores a list of all locations that are currently invalid which map to
     //the amount of frames that must pass before they are considered valid to evaluate
     Map<String,Integer> locationEvaluationCooldownMap = new ConcurrentHashMap<String,Integer>();
@@ -117,6 +117,15 @@ public class ClientFoliageManager {
     public void update(){
         if(ready){
             //TODO: frustum cull at cell level before individual model level
+            //to be clear, these blades are frustum culled 1-by-1 currently at the InstancedActor level
+            //if we frustum cull at cell level with priority updates around then, we can pack foliage into buffer in chunks
+            //and maintain the size of chunks and location on cpu
+            //then use opengl calls to buffer only occasionally
+            //if we're doing that we can also increase the amount and type of data (would be really nice to include position-in-chunk of foliage
+            //for instance for fancy shaders based on local position (think rainbow grass constantly pulsing))
+            //this will inherit all the difficulty of defragmenting the buffer, turning individual chunks on and off on gpu side, etc
+            //a way to save on sending position buffer to gpu would be to pack voxel pos into a smaller size ie use bitwise operators to store
+            //local coord in 1 * 4 bytes instead of 3 * 4 for a full vector
             for(FoliageCell cell : activeCells){
                 cell.draw(modelMatrixAttribute);
             }
@@ -299,22 +308,27 @@ public class ClientFoliageManager {
                 String foliageTypeName = foliageTypesSupported.get(placementRandomizer.nextInt() % foliageTypesSupported.size());
                 FoliageType foliageType = Globals.gameConfigCurrent.getFoliageMap().getFoliage(foliageTypeName);
                 //get position to place
-                double offsetX = placementRandomizer.nextDouble() * 0.6 + 0.2;
-                double offsetZ = placementRandomizer.nextDouble() * 0.6 + 0.2;
-                Vector3d absolutePosition = new Vector3d(
+                double offsetX = placementRandomizer.nextDouble() - 0.5;
+                double offsetY = 2;
+                double offsetZ = placementRandomizer.nextDouble() - 0.5;
+                // double offsetY = placeFoliage(dataToConsider, offsetX, offsetZ, 0.2, 0.5, 0.15, 0.2+0.6);
+                Vector3d testPosition = new Vector3d(
                     worldPos.x * ChunkData.CHUNK_SIZE + voxelPos.x + offsetX,
-                    worldPos.y * ChunkData.CHUNK_SIZE + voxelPos.y + data.getWeight(voxelPos) * 0.6,
+                    worldPos.y * ChunkData.CHUNK_SIZE + voxelPos.y + offsetY,
                     worldPos.z * ChunkData.CHUNK_SIZE + voxelPos.z + offsetZ
                 );
-                //create entity
-                Entity grassEntity = EntityCreationUtils.createClientSpatialEntity();
-                makeEntityInstancedFoliage(grassEntity, foliageType.getModelPath(), grassCapacity);
-                EntityUtils.getPosition(grassEntity).set(absolutePosition);
-                EntityUtils.getRotation(grassEntity).set(getNewRotation());
-                EntityUtils.getScale(grassEntity).set(new Vector3d(2.0, 2.0, 2.0));
-                //add ambient foliage behavior tree
-                AmbientFoliage.attachAmbientFoliageTree(grassEntity, initialGrowthLevel, foliageType.getGrowthModel().getGrowthRate());
-                cell.addEntity(grassEntity);
+                Vector3d placementPos = Globals.clientSceneWrapper.getCollisionEngine().rayCastPosition(testPosition, new Vector3d(0,-1,0), 2.5);
+                if(placementPos != null){
+                    //create entity
+                    Entity grassEntity = EntityCreationUtils.createClientSpatialEntity();
+                    makeEntityInstancedFoliage(grassEntity, foliageType.getModelPath(), grassCapacity);
+                    EntityUtils.getPosition(grassEntity).set(placementPos);
+                    EntityUtils.getRotation(grassEntity).set(getNewRotation());
+                    EntityUtils.getScale(grassEntity).set(new Vector3d(2.0, 2.0, 2.0));
+                    //add ambient foliage behavior tree
+                    AmbientFoliage.attachAmbientFoliageTree(grassEntity, initialGrowthLevel, foliageType.getGrowthModel().getGrowthRate());
+                    cell.addEntity(grassEntity);
+                }
             }
             activeCells.add(cell);
             locationCellMap.put(getFoliageCellKey(worldPos, voxelPos),cell);