fix aabb-road intersection test

docs/src/progress/renderertodo.md

@@ -1923,6 +1923,7 @@ Properly layout roads along town points in TownLayout
 Town generates a structure -- scaffolding for doing it across roads
 Structures create foundations in terrain voxels
 Place buildings along roads
+Fix town placement structure-road intersection test
 
 
 

src/main/java/electrosphere/renderer/pipelines/debug/DebugContentPipeline.java

@@ -3,6 +3,7 @@ package electrosphere.renderer.pipelines.debug;
 import java.util.LinkedList;
 import java.util.List;
 
+import org.joml.AABBd;
 import org.joml.Matrix4d;
 import org.joml.Quaterniond;
 import org.joml.Vector3d;
@@ -40,6 +41,9 @@ import electrosphere.renderer.pipelines.RenderPipeline;
 import electrosphere.renderer.texture.Texture;
 import electrosphere.server.datacell.Realm;
 import electrosphere.server.datacell.utils.EntityLookupUtils;
+import electrosphere.server.macro.civilization.road.Road;
+import electrosphere.server.macro.structure.VirtualStructure;
+import electrosphere.util.math.SpatialMathUtils;
 
 /**
  * Pipeline for rendering content to assist debugging
@@ -180,6 +184,17 @@ public class DebugContentPipeline implements RenderPipeline {
             }
         }
 
+        //
+        //Draw town data
+        if(Globals.gameConfigCurrent.getSettings().getGraphicsDebugDrawGridAlignment()){
+            for(VirtualStructure struct : Globals.serverState.realmManager.first().getMacroData().getStructures()){
+                DebugContentPipeline.renderAABB(openGLState, renderPipelineState, modelTransformMatrix, struct.getAABB(), AssetDataStrings.TEXTURE_BLUE_TRANSPARENT);
+            }
+            for(Road road : Globals.serverState.realmManager.first().getMacroData().getRoads()){
+                DebugContentPipeline.renderTube(openGLState, renderPipelineState, modelTransformMatrix, road.getPoint1(), road.getPoint2(), road.getRadius(), AssetDataStrings.TEXTURE_BLUE_TRANSPARENT);
+            }
+        }
+
         //update pipeline state to use mats again
         renderPipelineState.setUseMaterial(true);
         
@@ -416,6 +431,55 @@ public class DebugContentPipeline implements RenderPipeline {
         }
     }
 
+    /**
+     * Renders an area select
+     * @param openGLState The opengl state
+     * @param renderPipelineState The render pipeline state
+     * @param modelTransformMatrix The model transform matrix
+     * @param areaSelection The area selection
+     */
+    static void renderAABB(OpenGLState openGLState, RenderPipelineState renderPipelineState, Matrix4d modelTransformMatrix, AABBd aabb, String texturePath){
+        Model model = Globals.assetManager.fetchModel(AssetDataStrings.UNITCUBE);
+        if(model != null){
+            Texture texture = Globals.assetManager.fetchTexture(texturePath);
+            if(texture != null){
+                texture.bind(openGLState);
+            }
+            //calculate camera-modified vector3d
+            Vector3d cameraModifiedPosition = new Vector3d(aabb.minX,aabb.minY,aabb.minZ).lerp(new Vector3d(aabb.maxX,aabb.maxY,aabb.maxZ),0.5).sub(CameraEntityUtils.getCameraCenter(Globals.clientState.playerCamera));
+            modelTransformMatrix.identity();
+            modelTransformMatrix.translate(cameraModifiedPosition);
+            modelTransformMatrix.scale(new Vector3d(aabb.maxX - aabb.minX,aabb.maxY - aabb.minY,aabb.maxZ - aabb.minZ));
+            model.setModelMatrix(modelTransformMatrix);
+            model.draw(renderPipelineState,openGLState);
+        }
+    }
+
+    /**
+     * Renders an area select
+     * @param openGLState The opengl state
+     * @param renderPipelineState The render pipeline state
+     * @param modelTransformMatrix The model transform matrix
+     * @param areaSelection The area selection
+     */
+    static void renderTube(OpenGLState openGLState, RenderPipelineState renderPipelineState, Matrix4d modelTransformMatrix, Vector3d start, Vector3d end, double radius, String texturePath){
+        Model model = Globals.assetManager.fetchModel(AssetDataStrings.UNITCYLINDER);
+        if(model != null){
+            Texture texture = Globals.assetManager.fetchTexture(texturePath);
+            if(texture != null){
+                texture.bind(openGLState);
+            }
+            //calculate camera-modified vector3d
+            Vector3d cameraModifiedPosition = new Vector3d(end).lerp(new Vector3d(start),0.5).sub(CameraEntityUtils.getCameraCenter(Globals.clientState.playerCamera));
+            modelTransformMatrix.identity();
+            modelTransformMatrix.translate(cameraModifiedPosition);
+            modelTransformMatrix.rotate(SpatialMathUtils.calculateRotationFromPointToPoint(start, end).mul(new Quaterniond().rotateZ(Math.PI / 2.0)));
+            modelTransformMatrix.scale(new Vector3d(radius,end.distance(start) / 2.0,radius));
+            model.setModelMatrix(modelTransformMatrix);
+            model.draw(renderPipelineState,openGLState);
+        }
+    }
+
     /**
      * Gets the bone debugging pipeline
      * @return The bone debugging pipeline

src/main/java/electrosphere/server/macro/MacroData.java

@@ -18,6 +18,7 @@ import electrosphere.server.macro.spatial.MacroObject;
 import electrosphere.server.macro.structure.VirtualStructure;
 import electrosphere.server.macro.town.Town;
 import electrosphere.util.FileUtils;
+import electrosphere.util.math.GeomUtils;
 
 import java.util.Random;
 
@@ -310,14 +311,20 @@ public class MacroData {
      * @return true if it intersects any existing structs, false otheriwse
      */
     public boolean intersectsStruct(AABBd aabb){
-        List<MacroAreaObject> areaObjs = new LinkedList<MacroAreaObject>();
-        areaObjs.addAll(this.roads);
-        areaObjs.addAll(this.structures);
-        for(MacroAreaObject areaObj : areaObjs){
-            if(areaObj.getAABB().testAABB(aabb)){
+        for(VirtualStructure struct : this.structures){
+            if(struct.getAABB().testAABB(aabb)){
                 return true;
             }
         }
+        for(Road road : this.roads){
+            //broad phase
+            if(road.getAABB().testAABB(aabb)){
+                //near phase
+                if(GeomUtils.intersectAABBTube(aabb, road.getPoint1(), road.getPoint2(), road.getRadius())){
+                    return true;
+                }
+            }
+        }
         return false;
     }
     

src/main/java/electrosphere/server/macro/town/TownLayout.java

@@ -90,23 +90,17 @@ public class TownLayout {
 
         //
         //generate roads
-        Road newRoad;
+        Road upRoad = Road.createRoad(macroData, upNodeLoc, centerNodeLoc);
+        Road rightRoad = Road.createRoad(macroData, rightNodeLoc, centerNodeLoc);
+        Road leftRoad = Road.createRoad(macroData, leftNodeLoc, centerNodeLoc);
+        Road downRoad = Road.createRoad(macroData, downNodeLoc, centerNodeLoc);
 
-        //up-facing road
-        newRoad = Road.createRoad(macroData, upNodeLoc, centerNodeLoc);
-        TownLayout.generateStructuresAlongRoad(realm, town, newRoad, allowedStructures);
-
-        //right-facing road
-        newRoad = Road.createRoad(macroData, rightNodeLoc, centerNodeLoc);
-        TownLayout.generateStructuresAlongRoad(realm, town, newRoad, allowedStructures);
-
-        //left-facing road
-        newRoad = Road.createRoad(macroData, leftNodeLoc, centerNodeLoc);
-        TownLayout.generateStructuresAlongRoad(realm, town, newRoad, allowedStructures);
-
-        //down-facing road
-        newRoad = Road.createRoad(macroData, downNodeLoc, centerNodeLoc);
-        TownLayout.generateStructuresAlongRoad(realm, town, newRoad, allowedStructures);
+        //
+        //place structures along roads
+        TownLayout.generateStructuresAlongRoad(realm, town, upRoad, allowedStructures);
+        TownLayout.generateStructuresAlongRoad(realm, town, rightRoad, allowedStructures);
+        TownLayout.generateStructuresAlongRoad(realm, town, leftRoad, allowedStructures);
+        TownLayout.generateStructuresAlongRoad(realm, town, downRoad, allowedStructures);
 
         town.setResolution(Town.TOWN_RES_MAX);
     }
@@ -135,12 +129,14 @@ public class TownLayout {
             isNorthSouth = true;
         }
 
+        int roadRadiusOffsetRaw = (int)(road.getRadius() + 3);
+
         //offset applied to the scan location to not place it on top of the road
-        Vector3d placementOffset = null;
+        Vector3d roadOffset = null;
         if(isNorthSouth){
-            placementOffset = new Vector3d(road.getRadius() + 10,0,0);
+            roadOffset = new Vector3d(roadRadiusOffsetRaw,0,0);
         } else {
-            placementOffset = new Vector3d(0,0,road.getRadius() + 10);
+            roadOffset = new Vector3d(0,0,roadRadiusOffsetRaw);
         }
 
         //the position to try at
@@ -151,9 +147,10 @@ public class TownLayout {
         StructureData structureData = allowedStructures.get(0);
 
         //scan along the length of the road
-        for(int i = 0; i < len; i++){
+        for(int i = roadRadiusOffsetRaw; i < len; i++){
             //solve terrain position to place
-            currPos.set(dir).mul(i).add(startPoint).add(placementOffset);
+            currPos.set(startPoint).lerp(endPoint,i/(double)len).add(roadOffset);
+            // currPos.set(dir).mul(i).add(startPoint).add(roadOffset);
             currPos.y = realm.getServerWorldData().getServerTerrainManager().getElevation(currPos);
             //apply structure placement offset
             currPos.add(structureData.getPlacementOffset());
@@ -170,7 +167,7 @@ public class TownLayout {
         //scan along the length of the road
         for(int i = 0; i < len; i++){
             //solve terrain position to place
-            currPos.set(dir).mul(i).add(startPoint).sub(placementOffset).sub(structureData.getDimensions().x,0,structureData.getDimensions().z);
+            currPos.set(dir).mul(i).add(startPoint).sub(roadOffset).sub(structureData.getDimensions().x,0,structureData.getDimensions().z);
             currPos.y = realm.getServerWorldData().getServerTerrainManager().getElevation(currPos);
             //apply structure placement offset
             currPos.add(structureData.getPlacementOffset());

src/main/java/electrosphere/util/math/GeomUtils.java

@@ -1,6 +1,8 @@
 package electrosphere.util.math;
 
+import org.joml.AABBd;
 import org.joml.Intersectiond;
+import org.joml.Vector2d;
 import org.joml.Vector3d;
 import org.joml.Vector3i;
 
@@ -663,5 +665,28 @@ public class GeomUtils {
         double dist = Intersectiond.distancePointLine(point.x, point.y, point.z, lineStart.x, lineStart.y, lineStart.z, lineEnd.x, lineEnd.y, lineEnd.z);
         return dist < radius;
     }
+
+    /**
+     * Tests if an aabb intersects a tube
+     * @param aabb The aabb
+     * @param tubeStart The start of the tube
+     * @param tubeEnd The end of the tube
+     * @param radius The radius of the tube
+     * @return true if they intersect, false
+     */
+    public static boolean intersectAABBTube(AABBd aabb, Vector3d tubeStart, Vector3d tubeEnd, double radius){
+        Vector2d resDat = new Vector2d();
+        int res = Intersectiond.intersectLineSegmentAab(
+            tubeStart.x, tubeStart.y, tubeStart.z,
+            tubeEnd.x, tubeEnd.y, tubeEnd.z,
+            aabb.minX - radius, aabb.minY - radius, aabb.minZ - radius,
+            aabb.maxX + radius, aabb.maxY + radius, aabb.maxZ + radius,
+            resDat
+        );
+        if(res != Intersectiond.OUTSIDE){
+            return true;
+        }
+        return false;
+    }
     
 }