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Fix smooth lighting (ambient occlusion)

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Signed-off-by: Craig Robbins <kde.psych@gmail.com>
This commit is contained in:
Craig Robbins 2014-11-22 02:18:29 +10:00
parent f7f24d1470
commit cb2d467665
1 changed files with 21 additions and 16 deletions
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33
src/mapblock_mesh.cpp
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@ -245,7 +245,7 @@ static u16 getSmoothLightCombined(v3s16 p, MeshMakeData *data)
u16 light_day = 0;
u16 light_night = 0;
for(u32 i = 0; i < 8; i++)
for (u32 i = 0; i < 8; i++)
{
MapNode n = data->m_vmanip.getNodeNoEx(p - dirs8[i]);
@ -255,10 +255,9 @@ static u16 getSmoothLightCombined(v3s16 p, MeshMakeData *data)
}
const ContentFeatures &f = ndef->get(n);
if(f.light_source > light_source_max)
if (f.light_source > light_source_max)
light_source_max = f.light_source;
// Check f.solidness because fast-style leaves look
// better this way
// Check f.solidness because fast-style leaves look better this way
if (f.param_type == CPT_LIGHT && f.solidness != 2) {
light_day += decode_light(n.getLight(LIGHTBANK_DAY, ndef));
light_night += decode_light(n.getLight(LIGHTBANK_NIGHT, ndef));
@ -275,24 +274,30 @@ static u16 getSmoothLightCombined(v3s16 p, MeshMakeData *data)
light_night /= light_count;
// Boost brightness around light sources
bool skip_ambient_occlusion = false;
bool skip_ambient_occlusion_day = false;
if(decode_light(light_source_max) >= light_day) {
light_day = decode_light(light_source_max);
skip_ambient_occlusion = true;
}
if(decode_light(light_source_max) >= light_night) {
light_night = decode_light(light_source_max);
skip_ambient_occlusion = true;
skip_ambient_occlusion_day = true;
}
if(ambient_occlusion > 4 && !skip_ambient_occlusion)
bool skip_ambient_occlusion_night = false;
if(decode_light(light_source_max) >= light_night) {
light_night = decode_light(light_source_max);
skip_ambient_occlusion_night = true;
}
if (ambient_occlusion > 4)
{
//calculate table index for gamma space multiplier
ambient_occlusion -= 5;
//table of precalculated gamma space multiply factors
//light^2.2 * factor (0.75, 0.5, 0.25, 0.0), so table holds factor ^ (1 / 2.2)
static const float light_amount[4] = {0.877424315, 0.729740053, 0.532520545, 0.0};
static const float light_amount[4] = { 0.877424315, 0.729740053, 0.532520545, 0.0 };
//calculate table index for gamma space multiplier
ambient_occlusion -= 5;
if (!skip_ambient_occlusion_day)
light_day = rangelim(core::round32(light_day*light_amount[ambient_occlusion]), 0, 255);
if (!skip_ambient_occlusion_night)
light_night = rangelim(core::round32(light_night*light_amount[ambient_occlusion]), 0, 255);
}