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generate-time lighting optimization

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This commit is contained in:
Perttu Ahola 2011-01-15 13:50:13 +02:00
parent 83e083a667
commit a176f9eb36
7 changed files with 300 additions and 227 deletions
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89
src/mapblock.cpp
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@ -934,61 +934,68 @@ bool MapBlock::propagateSunlight(core::map<v3s16, bool> & light_sources,
s16 y = MAP_BLOCKSIZE-1;
if(no_sunlight == false)
{
// Continue spreading sunlight downwards through transparent
// nodes
for(; y >= 0; y--)
{
v3s16 pos(x, y, z);
MapNode &n = getNodeRef(pos);
if(n.sunlight_propagates())
{
n.setLight(LIGHTBANK_DAY, LIGHT_SUN);
light_sources.insert(pos_relative + pos, true);
}
else
{
// Turn mud into grass
if(n.d == CONTENT_MUD)
{
n.d = CONTENT_GRASS;
}
// Sunlight goes no further
break;
}
}
}
bool sunlight_should_go_down = (y==-1);
// This makes difference to diminishing in water.
bool stopped_to_solid_object = false;
/*
Check rest through to the bottom of the block
*/
u8 current_light = no_sunlight ? 0 : LIGHT_SUN;
for(; y >= 0; y--)
{
v3s16 pos(x, y, z);
MapNode &n = getNodeRef(pos);
if(current_light == 0)
{
// Do nothing
}
else if(current_light == LIGHT_SUN && n.sunlight_propagates())
{
// Do nothing: Sunlight is continued
}
else if(n.light_propagates() == false)
{
// Turn mud into grass
if(n.d == CONTENT_MUD && current_light == LIGHT_SUN)
{
n.d = CONTENT_GRASS;
}
if(n.light_propagates())
// A solid object is on the way.
stopped_to_solid_object = true;
// Light stops.
current_light = 0;
}
else
{
// Diminish light
current_light = diminish_light(current_light);
}
u8 old_light = n.getLight(LIGHTBANK_DAY);
if(current_light > old_light || remove_light)
{
n.setLight(LIGHTBANK_DAY, current_light);
}
if(diminish_light(current_light) != 0)
{
light_sources.insert(pos_relative + pos, true);
}
if(current_light == 0 && stopped_to_solid_object)
{
if(black_air_left)
{
*black_air_left = true;
}
if(remove_light)
{
// Fill transparent nodes with black
n.setLight(LIGHTBANK_DAY, 0);
}
}
}
// Whether or not the block below should see LIGHT_SUN
bool sunlight_should_go_down = (current_light == LIGHT_SUN);
/*
If the block below hasn't already been marked invalid: