Probleme mit der Camera und Voxel Terrain behoben

blight-editor/src/main/java/de/blight/editor/state/PlacedObjectState.java

@@ -147,6 +147,33 @@ public class PlacedObjectState extends BaseAppState {
         grassNode = new Node("grassNode");
         ((SimpleApplication) app).getRootNode().attachChild(grassNode);
         applyAllSlotMaterials();
+        initAspectRatios();
+    }
+
+    private void initAspectRatios() {
+        String[] allPaths = new String[8];
+        allPaths[0] = input.grassTexturePath != null ? input.grassTexturePath : "";
+        String[] slots = input.grassTextureSlots;
+        for (int i = 0; i < 7; i++) {
+            allPaths[i + 1] = (i < slots.length && slots[i] != null) ? slots[i] : "";
+        }
+        float[] ars = input.grassAspectRatios.clone();
+        for (int s = 0; s < 8; s++) {
+            String p = allPaths[s];
+            if (p == null || p.isEmpty()) continue;
+            try {
+                com.jme3.texture.Texture tex = assetManager.loadTexture(
+                        new com.jme3.asset.TextureKey(p, false));
+                if (tex != null && tex.getImage() != null) {
+                    int w = tex.getImage().getWidth();
+                    int h = tex.getImage().getHeight();
+                    if (w > 0 && h > 0) ars[s] = (float) w / h;
+                }
+            } catch (Exception e) {
+                log.debug("[PlacedObjectState] Aspect-Ratio nicht lesbar für Slot {}: {}", s, e.getMessage());
+            }
+        }
+        input.grassAspectRatios = ars;
     }
 
     @Override

blight-game/src/main/java/de/blight/game/control/ThirdPersonCamera.java

@@ -26,12 +26,15 @@ public class ThirdPersonCamera {
     private static final float MIN_VERTICAL_ANGLE = -0.12f;  // Kamera kann bis Kniehöhe sinken
     private static final float MAX_VERTICAL_ANGLE = FastMath.HALF_PI - 0.1f;
     private static final float TARGET_HEIGHT      = 1.0f;
+    private static final float CAM_CLEARANCE      = 0.3f;   // Rückzugsabstand bei Terrain-Kollision
 
     private final Camera cam;
     private final InputManager inputManager;
     private final KeyBindings keyBindings;
 
     private Spatial target;
+    /** Liefert den Trefferanteil (0..1) eines Strahls von from→to; 1 = kein Treffer. */
+    private java.util.function.BiFunction<com.jme3.math.Vector3f, com.jme3.math.Vector3f, Float> raycastProvider;
 
     private float yaw      = 0f;
     private float pitch    = 0.4f;
@@ -59,6 +62,11 @@ public class ThirdPersonCamera {
 
     public void setPaused(boolean paused) { this.paused = paused; }
 
+    /** Raycast-Anbieter: gibt Trefferanteil (0..1) zurück; 1 = freie Sichtlinie. */
+    public void setRaycastProvider(java.util.function.BiFunction<com.jme3.math.Vector3f, com.jme3.math.Vector3f, Float> provider) {
+        this.raycastProvider = provider;
+    }
+
     // -----------------------------------------------------------------------
 
     private void registerMappings() {
@@ -111,6 +119,18 @@ public class ThirdPersonCamera {
         float z = distance * FastMath.cos(pitch) * FastMath.cos(yaw);
 
         Vector3f camPos = pivot.add(x, y, z);
+
+        if (raycastProvider != null) {
+            float fraction = raycastProvider.apply(pivot, camPos);
+            if (fraction < 1f) {
+                Vector3f dir    = camPos.subtract(pivot);
+                float    rayLen = dir.length();
+                dir.normalizeLocal();
+                float safeLen = Math.max(MIN_DISTANCE * 0.5f, fraction * rayLen - CAM_CLEARANCE);
+                camPos = pivot.add(dir.mult(safeLen));
+            }
+        }
+
         cam.setLocation(camPos);
         cam.lookAt(pivot, Vector3f.UNIT_Y);
     }

blight-game/src/main/java/de/blight/game/scene/WorldScene.java

@@ -318,6 +318,19 @@ public class WorldScene extends BaseAppState {
 
         thirdPersonCam = new ThirdPersonCamera(app.getCamera(), app.getInputManager(), keyBindings);
         thirdPersonCam.setTarget(character);
+        thirdPersonCam.setRaycastProvider((from, to) -> {
+            com.jme3.bullet.PhysicsSpace ps =
+                    bulletAppState != null ? bulletAppState.getPhysicsSpace() : null;
+            if (ps == null) return 1f;
+            java.util.List<com.jme3.bullet.collision.PhysicsRayTestResult> hits = ps.rayTest(from, to);
+            float best = 1f;
+            for (com.jme3.bullet.collision.PhysicsRayTestResult hit : hits) {
+                Object uo = hit.getCollisionObject().getUserObject();
+                if (uo == physicsChar || uo == character) continue;
+                if (hit.getHitFraction() < best) best = hit.getHitFraction();
+            }
+            return best;
+        });
 
         MainCharacter mc = findMainCharacter();
         if (mc != null) {

blight-game/src/main/java/de/blight/game/state/GrassState.java

@@ -36,18 +36,18 @@ public class GrassState extends BaseAppState
 
     private static final Logger log = LoggerFactory.getLogger(GrassState.class);
 
-    private static final int   TERRAIN_HALF    = 2048;
-    private static final int   CHUNK_SIZE      = 128;
-    private static final int   CHUNKS_PER_AXIS = (TERRAIN_HALF * 2) / CHUNK_SIZE; // 32
-    private static final int   CHUNK_COUNT     = CHUNKS_PER_AXIS * CHUNKS_PER_AXIS; // 1024
+    private static final int   CHUNK_SIZE      = de.blight.common.ChunkTerrainIO.CHUNK_SIZE;      // 128
+    private static final int   TERRAIN_HALF    = de.blight.common.ChunkTerrainIO.WORLD_SIZE / 2;  // 1024
+    private static final int   CHUNKS_PER_AXIS = de.blight.common.ChunkTerrainIO.CHUNKS_PER_AXIS; // 16
+    private static final int   CHUNK_COUNT     = de.blight.common.ChunkTerrainIO.CHUNK_COUNT;     // 256
     private static final int   BLADES_PER_TUFT = 4;
     private static final float TUFT_SPREAD     = 0.5f;
-    private static final float BLADE_WIDTH     = 0.18f;
     private static final int   INIT_PER_FRAME  = 4;
 
     private final TerrainChunkState terrainChunkState;
 
-    private Node   grassNode;
+    private Node    grassNode;
+    private float[] slotAspectRatios = new float[8];
 
     @SuppressWarnings({"unchecked", "rawtypes"})
     private final List<GrassTuft>[] chunkTufts   = new List[CHUNK_COUNT];
@@ -69,8 +69,9 @@ public class GrassState extends BaseAppState
 
         for (int i = 0; i < CHUNK_COUNT; i++) chunkTufts[i] = new ArrayList<>();
 
+        GrassTuftIO.GrassData data = null;
         try {
-            GrassTuftIO.GrassData data = GrassTuftIO.load();
+            data = GrassTuftIO.load();
             if (data != null) {
                 initSlotMaterials(app.getAssetManager(), data.slotPaths());
                 for (GrassTuft t : data.tufts()) {
@@ -85,6 +86,28 @@ public class GrassState extends BaseAppState
         if (slotMaterials.isEmpty()) {
             slotMaterials.put(0, buildGrassMat(app.getAssetManager(), ""));
         }
+        initAspectRatios(app.getAssetManager(),
+                         data != null ? data.slotPaths() : null);
+    }
+
+    private void initAspectRatios(AssetManager assets, String[] slotPaths) {
+        java.util.Arrays.fill(slotAspectRatios, 1f);
+        if (slotPaths == null) return;
+        for (int s = 0; s < Math.min(slotAspectRatios.length, slotPaths.length); s++) {
+            String p = slotPaths[s];
+            if (p == null || p.isEmpty()) continue;
+            try {
+                com.jme3.texture.Texture tex = assets.loadTexture(
+                        new com.jme3.asset.TextureKey(p, false));
+                if (tex != null && tex.getImage() != null) {
+                    int w = tex.getImage().getWidth();
+                    int h = tex.getImage().getHeight();
+                    if (w > 0 && h > 0) slotAspectRatios[s] = (float) w / h;
+                }
+            } catch (Exception e) {
+                log.debug("[GrassState] Aspect-Ratio nicht lesbar Slot {}: {}", s, e.getMessage());
+            }
+        }
     }
 
     @Override
@@ -228,8 +251,10 @@ public class GrassState extends BaseAppState
             if (entry.getValue().isEmpty()) continue;
             Material mat = getSlotMaterial(entry.getKey());
             if (mat == null) continue;
-            Geometry geo = new Geometry("grass_" + idx + "_s" + entry.getKey(),
-                                        buildGrassMesh(entry.getValue()));
+            int   slot = entry.getKey();
+            float ar   = (slot < slotAspectRatios.length) ? slotAspectRatios[slot] : 1f;
+            Geometry geo = new Geometry("grass_" + idx + "_s" + slot,
+                                        buildGrassMesh(entry.getValue(), ar));
             geo.setMaterial(mat);
             node.attachChild(geo);
         }
@@ -288,7 +313,7 @@ public class GrassState extends BaseAppState
 
     // ── Mesh: Kreuz-Quad mit UV ───────────────────────────────────────────────
 
-    private static Mesh buildGrassMesh(List<float[]> blades) {
+    private static Mesh buildGrassMesh(List<float[]> blades, float ar) {
         int n = blades.size();
         FloatBuffer pos = BufferUtils.createFloatBuffer(n * 8 * 3);
         FloatBuffer uv  = BufferUtils.createFloatBuffer(n * 8 * 2);
@@ -298,7 +323,7 @@ public class GrassState extends BaseAppState
         int vi = 0;
         for (float[] blade : blades) {
             float x = blade[0], y = blade[1], z = blade[2], h = blade[3];
-            float w = Math.max(0.05f, h * BLADE_WIDTH);
+            float w = Math.max(0.05f, h * ar * 0.5f);
 
             pos.put(x-w).put(y  ).put(z);  uv.put(0).put(0);  nrm.put(0).put(1).put(0);
             pos.put(x+w).put(y  ).put(z);  uv.put(1).put(0);  nrm.put(0).put(1).put(0);