initial steps in doing content type extension

[oweals/minetest.git] / src / mapnode.cpp

diff --git a/src/mapnode.cpp b/src/mapnode.cpp
index dae21e7ccc463f33b0af8d24914d977a684f89a7..391e593f9548b9715de7f733169e88a50eb44f78 100644 (file)
--- a/src/mapnode.cpp
+++ b/src/mapnode.cpp
@@ -30,8 +30,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 ContentFeatures::~ContentFeatures()
 {
-       if(translate_to)
-               delete translate_to;
+       /*if(translate_to)
+               delete translate_to;*/
        if(initial_metadata)
                delete initial_metadata;
 }
@@ -138,6 +138,17 @@ void init_mapnode()
                        f->tiles[j].material_type = initial_material_type;
        }
 
+       /*
+               Initially set every block to be shown as an unknown block.
+               Don't touch CONTENT_IGNORE or CONTENT_AIR.
+       */
+       for(u16 i=0; i<=253; i++)
+       {
+               ContentFeatures *f = &g_content_features[i];
+               f->setAllTextures("unknown_block.png");
+               f->dug_item = std::string("MaterialItem ")+itos(i)+" 1";
+       }
+
        /*
                Initialize mapnode content
        */
@@ -230,6 +241,94 @@ u8 MapNode::getMineral()
        return MINERAL_NONE;
 }
 
+u32 MapNode::serializedLength(u8 version)
+{
+       if(!ser_ver_supported(version))
+               throw VersionMismatchException("ERROR: MapNode format not supported");
+               
+       if(version == 0)
+               return 1;
+       else if(version <= 9)
+               return 2;
+       else
+               return 3;
+}
+void MapNode::serialize(u8 *dest, u8 version)
+{
+       if(!ser_ver_supported(version))
+               throw VersionMismatchException("ERROR: MapNode format not supported");
+               
+       u8 actual_d = d;
+
+       // Convert from new version to old
+       if(version <= 18)
+       {
+               // In these versions, CONTENT_IGNORE and CONTENT_AIR
+               // are 255 and 254
+               if(d == CONTENT_IGNORE)
+                       d = 255;
+               else if(d == CONTENT_AIR)
+                       d = 254;
+       }
+
+       if(version == 0)
+       {
+               dest[0] = actual_d;
+       }
+       else if(version <= 9)
+       {
+               dest[0] = actual_d;
+               dest[1] = param;
+       }
+       else
+       {
+               dest[0] = actual_d;
+               dest[1] = param;
+               dest[2] = param2;
+       }
+}
+void MapNode::deSerialize(u8 *source, u8 version)
+{
+       if(!ser_ver_supported(version))
+               throw VersionMismatchException("ERROR: MapNode format not supported");
+               
+       if(version == 0)
+       {
+               d = source[0];
+       }
+       else if(version == 1)
+       {
+               d = source[0];
+               // This version doesn't support saved lighting
+               if(light_propagates() || light_source() > 0)
+                       param = 0;
+               else
+                       param = source[1];
+       }
+       else if(version <= 9)
+       {
+               d = source[0];
+               param = source[1];
+       }
+       else
+       {
+               d = source[0];
+               param = source[1];
+               param2 = source[2];
+               
+               // Convert from old version to new
+               if(version <= 18)
+               {
+                       // In these versions, CONTENT_IGNORE and CONTENT_AIR
+                       // are 255 and 254
+                       if(d == 255)
+                               d = CONTENT_IGNORE;
+                       else if(d == 254)
+                               d = CONTENT_AIR;
+               }
+       }
+}
+
 /*
        Gets lighting value at face of node