APIDump: Documented HOOK_CHUNK_GENERATING.

MCServer/Plugins/APIDump/APIDesc.lua

@@ -2167,7 +2167,9 @@ end;
 				been generated and is about to be stored in the {{cWorld|world}}. A plugin may provide some
 				last-minute finishing touches to the generated data. Note that the chunk is not yet stored in the
 				world, so regular {{cWorld}} block API will not work! Instead, use the {{cChunkDesc}} object
-				received as the parameter.
+				received as the parameter.</p>
+				<p>
+				See also the {{OnChunkGenerating|HOOK_CHUNK_GENERATING}} hook.
 			]],
 			Params =
 			{
@@ -2220,6 +2222,36 @@ end;
 				},
 			} ,  -- CodeExamples
 		},  -- HOOK_CHUNK_GENERATED
+
+		HOOK_CHUNK_GENERATING =
+		{
+			CalledWhen = "A chunk is about to be generated. Plugin can override the built-in generator.",
+			DefaultFnName = "OnChunkGenerating",  -- also used as pagename
+			Desc = [[
+				This hook is called before the world generator starts generating a chunk. The plugin may provide
+				some or all parts of the generation, by-passing the built-in generator. The function is given access
+				to the {{cChunkDesc|ChunkDesc}} object representing the contents of the chunk. It may override parts
+				of the built-in generator by using the object's <i>SetUseDefaultXXX(false)</i> functions. After all
+				the callbacks for a chunk have been processed, the server will generate the chunk based on the
+				{{cChunkDesc|ChunkDesc}} description - those parts that are set for generating (by default
+				everything) are generated, the rest are read from the ChunkDesc object.</p>
+				<p>
+				See also the {{OnChunkGenerated|HOOK_CHUNK_GENERATED}} hook.
+			]],
+			Params =
+			{
+				{ Name = "World", Type = "{{cWorld}}", Notes = "The world to which the chunk will be added" },
+				{ Name = "ChunkX", Type = "number", Notes = "X-coord of the chunk" },
+				{ Name = "ChunkZ", Type = "number", Notes = "Z-coord of the chunk" },
+				{ Name = "ChunkDesc", Type = "{{cChunkDesc}}", Notes = "Generated chunk data." },
+			},
+			Returns = [[
+				If this function returns true, the server will not call any other plugin with the same chunk. If
+				this function returns false, the server will call the rest of the plugins with the same chunk,
+				possibly overwriting the ChunkDesc's contents.
+			]],
+		},  -- HOOK_CHUNK_GENERATING
+
 	},  -- Hooks[]