Malen von Gras erweitert

2026-08-21 15:03:23 +02:00
parent 5d8e4db468
commit 03dcfb4187
15 changed files with 1055 additions and 41 deletions
--- a/blight-common/src/main/java/de/blight/common/TerrainColorGrassIO.java
+++ b/blight-common/src/main/java/de/blight/common/TerrainColorGrassIO.java
@@ -0,0 +1,66 @@
+package de.blight.common;
+
+import java.io.*;
+import java.nio.file.*;
+import java.util.*;
+import java.util.zip.*;
+
+/**
+ * Liest und schreibt Terrain-Farb-Gras-Halme als komprimierte Binärdatei
+ * ({@code blight_grass_terrain.blgv}) neben der Kartendatei.
+ *
+ * Format v1: int MAGIC, int VERSION, int count, N × (float x, float y, float z, float height, byte seedIdx)
+ * Kein Trockenheitswert – Farbe kommt ausschließlich vom Terrain.
+ */
+public final class TerrainColorGrassIO {
+
+    private static final int MAGIC   = 0x54434758; // "TCGX"
+    private static final int VERSION = 1;
+
+    private TerrainColorGrassIO() {}
+
+    public static Path getPath() {
+        return MapIO.getMapPath().resolveSibling("blight_grass_terrain.blgv");
+    }
+
+    public static void save(List<GrassVertexBlade> blades) throws IOException {
+        Path p = getPath();
+        Files.createDirectories(p.getParent());
+        try (DataOutputStream out = new DataOutputStream(
+                new BufferedOutputStream(new GZIPOutputStream(Files.newOutputStream(p))))) {
+            out.writeInt(MAGIC);
+            out.writeInt(VERSION);
+            out.writeInt(blades.size());
+            for (GrassVertexBlade b : blades) {
+                out.writeFloat(b.x());
+                out.writeFloat(b.y());
+                out.writeFloat(b.z());
+                out.writeFloat(b.height());
+                out.writeByte(Math.max(-1, Math.min(126, b.seedIdx())));
+            }
+        }
+    }
+
+    public static List<GrassVertexBlade> load() throws IOException {
+        Path p = getPath();
+        if (!Files.exists(p)) return List.of();
+        try (DataInputStream in = new DataInputStream(
+                new BufferedInputStream(new GZIPInputStream(Files.newInputStream(p))))) {
+            int magic = in.readInt();
+            if (magic != MAGIC) throw new IOException("Ungültiges Dateiformat (MAGIC)");
+            int version = in.readInt();
+            if (version < 1 || version > VERSION) throw new IOException("Unbekannte Version: " + version);
+            int count = in.readInt();
+            List<GrassVertexBlade> list = new ArrayList<>(count);
+            for (int i = 0; i < count; i++) {
+                float x = in.readFloat();
+                float y = in.readFloat();
+                float z = in.readFloat();
+                float h = in.readFloat();
+                int   si = in.readByte();
+                list.add(new GrassVertexBlade(x, y, z, h, 0f, si));
+            }
+            return list;
+        }
+    }
+}