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Biome API decorations: 'spawnby' searches a 3D neighbourhood 

The neighbours checked are the 8 nodes horizontally surrounding the decoration base
and the 8 nodes horizontally surrounding the ground node below the decoration
This commit is contained in:
paramat 2015-07-08 20:01:29 +01:00
parent 39439cbd3d
commit b51738177e
2 changed files with 14 additions and 3 deletions
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4
doc/lua_api.txt
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@ -3331,7 +3331,9 @@ Definition tables
-- ^ Number of nodes the decoration can be at maximum.
-- ^ If absent, the parameter 'height' is used as a constant.
spawn_by = "default:water",
-- ^ Node that the decoration only spawns next to, in a 1-node square radius.
-- ^ Node that the decoration only spawns next to.
-- ^ The neighbours checked are the 8 nodes horizontally surrounding the lowest node of the
-- ^ decoration, and the 8 nodes horizontally surrounding the ground node below the decoration.
num_spawn_by = 1,
-- ^ Number of spawn_by nodes that must be surrounding the decoration position to occur.
-- ^ If absent or -1, decorations occur next to any nodes.

13
src/mg_decoration.cpp
View File

@ -246,7 +246,7 @@ bool DecoSimple::canPlaceDecoration(MMVManip *vm, v3s16 p)
return true;
int nneighs = 0;
v3s16 dirs[8] = {
v3s16 dirs[16] = {
v3s16( 0, 0, 1),
v3s16( 0, 0, -1),
v3s16( 1, 0, 0),
@ -254,7 +254,16 @@ bool DecoSimple::canPlaceDecoration(MMVManip *vm, v3s16 p)
v3s16( 1, 0, 1),
v3s16(-1, 0, 1),
v3s16(-1, 0, -1),
v3s16( 1, 0, -1)
v3s16( 1, 0, -1),
v3s16( 0, 1, 1),
v3s16( 0, 1, -1),
v3s16( 1, 1, 0),
v3s16(-1, 1, 0),
v3s16( 1, 1, 1),
v3s16(-1, 1, 1),
v3s16(-1, 1, -1),
v3s16( 1, 1, -1)
};
// Check a Moore neighborhood if there are enough spawnby nodes