Add support for 1.21.5+ (Pale Garden generates more after 25w02a)

biomenoise.c

@@ -5,6 +5,7 @@
 #include "tables/btree19.h"
 #include "tables/btree20.h"
 #include "tables/btree21wd.h"
+#include "tables/btree215.h"
 
 #include <stdlib.h>
 #include <string.h>
@@ -1453,11 +1454,20 @@ int climateToBiome(int mc, const uint64_t np[6], uint64_t *dat)
         btree21wd_steps, &btree21wd_param[0][0], btree21wd_nodes, btree21wd_order,
         sizeof(btree21wd_nodes) / sizeof(uint64_t)
     };
+    static const BiomeTree btree215 = {
+        btree215_steps, &btree215_param[0][0], btree215_nodes, btree215_order,
+        sizeof(btree215_nodes) / sizeof(uint64_t)
+    };
 
     const BiomeTree *bt;
     int idx;
 
-    if (mc >= MC_1_21_WD)
+    // THAT IS A LECTURE:
+    // When you patch a newer version, do not forget to put an 'else'
+    // here after you add the new biome tree.
+    if (mc >= MC_1_21_5)
+        bt = &btree215;
+    else if (mc >= MC_1_21_WD)
         bt = &btree21wd;
     else if (mc >= MC_1_20_6)
         bt = &btree20;

biomenoise.h

@@ -22,7 +22,7 @@ STRUCT(Range)
     //
     // Volumes generated with a range are generally indexed as:
     //  out [ i_y*sx*sz + i_z*sx + i_x ]
-    // where i_x, i_y, i_z are indecies in their respective directions.
+    // where i_x, i_y, i_z are indices in their respective directions.
     //
     // EXAMPLES
     // Area at normal biome scale (1:4):

biomes.h

@@ -34,8 +34,10 @@ enum MCVersion
     MC_1_20_6, MC_1_20 = MC_1_20_6,
     MC_1_21_1,
     MC_1_21_3,
-    MC_1_21_WD, // Winter Drop, version TBA
-    MC_1_21 = MC_1_21_WD,
+    MC_1_21_WD, MC_1_21_4 = MC_1_21_WD,
+    MC_1_21_5,
+    MC_1_21_11 = MC_1_21_5,
+    MC_1_21 = MC_1_21_5,
     MC_NEWEST = MC_1_21,
 };
 

finders.c

@@ -5470,6 +5470,9 @@ static const int g_biome_para_range_21wd_diff[][13] = {
 {pale_garden             , -1500, 2000,  3000, IMAX,   300, IMAX, -7799,  500,  IMIN, IMAX,  2666, IMAX},
 {-1,0,0,0,0,0,0,0,0,0,0,0,0}};
 
+static const int g_biome_para_range_215_diff[][13] = {
+{pale_garden             , -1500, 2000,  3000, IMAX,   300, IMAX, -7799,  500,  IMIN, IMAX,  IMIN, IMAX},
+{-1,0,0,0,0,0,0,0,0,0,0,0,0}};
 
 /**
  * Gets the min/max parameter values within which a biome change can occur.
@@ -5508,6 +5511,14 @@ const int *getBiomeParaLimits(int mc, int id)
     if (mc <= MC_1_17)
         return NULL;
     int i;
+    if (mc > MC_1_21_WD)
+    {
+        for (i = 0; g_biome_para_range_215_diff[i][0] != -1; i++)
+        {
+            if (g_biome_para_range_215_diff[i][0] == id)
+                return &g_biome_para_range_215_diff[i][1];
+        }
+    }
     if (mc > MC_1_21_3)
     {
         for (i = 0; g_biome_para_range_21wd_diff[i][0] != -1; i++)

generator.h

@@ -130,7 +130,9 @@ int genArea(const Layer *layer, int *out, int areaX, int areaZ, int areaWidth, i
 /**
  * Map an approximation of the Overworld surface height.
  * The horizontal scaling is 1:4. If non-null, the ids are filled with the
- * biomes of the area. The height (written to y) is in blocks.
+ * biomes of the area. The height (written to y[w*h]) is in blocks.
+ * If the Generator's dimension is Overworld and version before Beta 1.8
+ * or after 1.18, SurfaceNoise is not needed.
  */
 int mapApproxHeight(float *y, int *ids, const Generator *g,
     const SurfaceNoise *sn, int x, int z, int w, int h);