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-rw-r--r--src/mapnode.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/src/mapnode.h b/src/mapnode.h
index 50b257ba2..57382aa2b 100644
--- a/src/mapnode.h
+++ b/src/mapnode.h
@@ -152,13 +152,20 @@ struct ContentFeatures
// This is used for collision detection.
// Also for general solidness queries.
bool walkable;
+ // Player can point to these
bool pointable;
+ // Player can dig these
bool diggable;
+ // Player can build on these
bool buildable_to;
+ // Whether the node has no liquid, source liquid or flowing liquid
enum LiquidType liquid_type;
- // If true, param2 is set to direction when placed
+ // If true, param2 is set to direction when placed. Used for torches.
// NOTE: the direction format is quite inefficient and should be changed
bool wall_mounted;
+ // If true, node is equivalent to air. Torches are, air is. Water is not.
+ // Is used for example to check whether a mud block can have grass on.
+ bool air_equivalent;
// Inventory item string as which the node appears in inventory when dug.
// Mineral overrides this.
@@ -184,6 +191,7 @@ struct ContentFeatures
buildable_to = false;
liquid_type = LIQUID_NONE;
wall_mounted = false;
+ air_equivalent = false;
dug_item = "";
initial_metadata = NULL;
}