diff options
Diffstat (limited to 'src/mapnode.cpp')
| -rw-r--r-- | src/mapnode.cpp | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/mapnode.cpp b/src/mapnode.cpp index 3717bf0ab..dae21e7cc 100644 --- a/src/mapnode.cpp +++ b/src/mapnode.cpp @@ -230,4 +230,54 @@ u8 MapNode::getMineral() return MINERAL_NONE; } +/* + Gets lighting value at face of node + + Parameters must consist of air and !air. + Order doesn't matter. + + If either of the nodes doesn't exist, light is 0. + + parameters: + daynight_ratio: 0...1000 + n: getNodeParent(p) + n2: getNodeParent(p + face_dir) + face_dir: axis oriented unit vector from p to p2 + + returns encoded light value. +*/ +u8 getFaceLight(u32 daynight_ratio, MapNode n, MapNode n2, + v3s16 face_dir) +{ + try{ + u8 light; + u8 l1 = n.getLightBlend(daynight_ratio); + u8 l2 = n2.getLightBlend(daynight_ratio); + if(l1 > l2) + light = l1; + else + light = l2; + + // Make some nice difference to different sides + + // This makes light come from a corner + /*if(face_dir.X == 1 || face_dir.Z == 1 || face_dir.Y == -1) + light = diminish_light(diminish_light(light)); + else if(face_dir.X == -1 || face_dir.Z == -1) + light = diminish_light(light);*/ + + // All neighboring faces have different shade (like in minecraft) + if(face_dir.X == 1 || face_dir.X == -1 || face_dir.Y == -1) + light = diminish_light(diminish_light(light)); + else if(face_dir.Z == 1 || face_dir.Z == -1) + light = diminish_light(light); + + return light; + } + catch(InvalidPositionException &e) + { + return 0; + } +} + |