From a4d2f7d72adf1fcee79b97a35a4928bfb7de04d3 Mon Sep 17 00:00:00 2001
From: austin <austin@austinhoover.net>
Date: Tue, 20 May 2025 14:51:14 -0400
Subject: [PATCH] structure voxel foundation

---
 docs/src/progress/renderertodo.md                 |  1 +
 .../server/macro/town/TownLayout.java             |  3 ++-
 .../generation/ProceduralChunkGenerator.java      | 15 +++++++++++++++
 .../terrain/manager/ChunkGenerationThread.java    |  9 +++++++++
 4 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/docs/src/progress/renderertodo.md b/docs/src/progress/renderertodo.md
index ef1ab8b8..4068defa 100644
--- a/docs/src/progress/renderertodo.md
+++ b/docs/src/progress/renderertodo.md
@@ -1921,6 +1921,7 @@ Content generation blocks for macro data generation
 Roads block content generation
 Properly layout roads along town points in TownLayout
 Town generates a structure -- scaffolding for doing it across roads
+Structures create foundations in terrain voxels
 
 
 
diff --git a/src/main/java/electrosphere/server/macro/town/TownLayout.java b/src/main/java/electrosphere/server/macro/town/TownLayout.java
index a757fa7f..e5994b85 100644
--- a/src/main/java/electrosphere/server/macro/town/TownLayout.java
+++ b/src/main/java/electrosphere/server/macro/town/TownLayout.java
@@ -98,7 +98,8 @@ public class TownLayout {
         aabb.setMin(pos);
         aabb.setMax(new Vector3d(pos).add(structureData.getDimensions()));
         if(!macroData.intersectsStruct(aabb)){
-            VirtualStructure.createStructure(macroData, structureData, pos);
+            VirtualStructure struct = VirtualStructure.createStructure(macroData, structureData, pos);
+            town.addStructure(struct);
         }
 
         //right-facing road
diff --git a/src/main/java/electrosphere/server/physics/terrain/generation/ProceduralChunkGenerator.java b/src/main/java/electrosphere/server/physics/terrain/generation/ProceduralChunkGenerator.java
index 59e41d42..1d2222f9 100644
--- a/src/main/java/electrosphere/server/physics/terrain/generation/ProceduralChunkGenerator.java
+++ b/src/main/java/electrosphere/server/physics/terrain/generation/ProceduralChunkGenerator.java
@@ -4,6 +4,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import org.joml.AABBd;
 import org.joml.Vector3d;
 
 import electrosphere.client.terrain.cache.ChunkData;
@@ -14,6 +15,7 @@ import electrosphere.engine.Globals;
 import electrosphere.server.datacell.ServerWorldData;
 import electrosphere.server.macro.civilization.road.Road;
 import electrosphere.server.macro.spatial.MacroObject;
+import electrosphere.server.macro.structure.VirtualStructure;
 import electrosphere.server.macro.town.Town;
 import electrosphere.server.physics.terrain.generation.heightmap.EmptySkyGen;
 import electrosphere.server.physics.terrain.generation.heightmap.HeightmapGenerator;
@@ -282,6 +284,19 @@ public class ProceduralChunkGenerator implements ChunkGenerator {
                         }
                     }
                 }
+            } else if(object instanceof VirtualStructure){
+                VirtualStructure struct = (VirtualStructure)object;
+                AABBd aabb = struct.getAABB();
+                //create a foundation underneath the structure
+                if(realX >= aabb.minX && realX <= aabb.maxX && realZ >= aabb.minZ && realZ <= aabb.maxZ){
+                    //check if within foundation range
+                    double vertDist = aabb.minY - realY;
+                    if(vertDist > 0 && vertDist < 2){
+                        voxel.type = 1;
+                        voxel.weight = 1;
+                        rVal = true;
+                    }
+                }
             } else if(object instanceof Town){
             } else {
                 throw new Error("Unsupported object type " + object);
diff --git a/src/main/java/electrosphere/server/physics/terrain/manager/ChunkGenerationThread.java b/src/main/java/electrosphere/server/physics/terrain/manager/ChunkGenerationThread.java
index 635c48ec..09aef7f8 100644
--- a/src/main/java/electrosphere/server/physics/terrain/manager/ChunkGenerationThread.java
+++ b/src/main/java/electrosphere/server/physics/terrain/manager/ChunkGenerationThread.java
@@ -3,6 +3,7 @@ package electrosphere.server.physics.terrain.manager;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
 import java.util.function.Consumer;
+import java.util.stream.Collectors;
 
 import electrosphere.engine.Globals;
 import electrosphere.logger.LoggerInterface;
@@ -10,6 +11,8 @@ import electrosphere.server.datacell.ServerWorldData;
 import electrosphere.server.macro.MacroData;
 import electrosphere.server.macro.spatial.MacroLODObject;
 import electrosphere.server.macro.spatial.MacroObject;
+import electrosphere.server.macro.structure.VirtualStructure;
+import electrosphere.server.macro.town.Town;
 import electrosphere.server.physics.terrain.diskmap.ChunkDiskMap;
 import electrosphere.server.physics.terrain.generation.interfaces.ChunkGenerator;
 
@@ -163,6 +166,12 @@ public class ChunkGenerationThread implements Runnable {
         if(notFullResCount > 0){
             return null;
         }
+        List<MacroObject> towns = objects.stream().filter((MacroObject obj) -> obj instanceof Town).collect(Collectors.toList());
+        for(MacroObject currObj : towns){
+            Town town = (Town)currObj;
+            List<VirtualStructure> structs = town.getStructures(macroData);
+            objects.addAll(structs);
+        }
 
         if(chunkCache.containsChunk(worldX, worldY, worldZ, stride)){
             rVal = chunkCache.get(worldX, worldY, worldZ, stride);