From e19dab2622b89471dba3000bd42b5598fc4ebee8 Mon Sep 17 00:00:00 2001
From: TriBlade9 <triblade9@mail.com>
Date: Wed, 14 Jan 2015 23:34:44 +1000
Subject: [PATCH] Added configurable ambient_occlusion_gamma. Default is 2.2
(same as previous hardcoded values).
---
minetest.conf.example | 6 +++++-
src/defaultsettings.cpp | 2 +-
src/mapblock_mesh.cpp | 12 +++++++++---
3 files changed, 15 insertions(+), 5 deletions(-)
diff --git a/minetest.conf.example b/minetest.conf.example
index 0b137c5a2..e1d880d83 100644
--- a/minetest.conf.example
+++ b/minetest.conf.example
@@ -216,6 +216,11 @@
# Set to true enables waving plants. Requires shaders enabled.
#enable_waving_plants = false
# Enables caching of facedir rotated meshes
+#ambient_occlusion_gamma = 2.2
+# The strength (darkness) of node ambient-occlusion shading.
+# Lower is darker, Higher is lighter. The valid range of values for this
+# setting is 0.25 to 4.0 inclusive. If the value is out of range it will be
+# set to the nearest valid value.
#enable_mesh_cache = true
# The time in seconds it takes between repeated
# right clicks when holding the right mouse button.
@@ -548,4 +553,3 @@
# Noise parameters for biome API temperature and humidity
#mg_biome_np_heat = 50, 50, (500, 500, 500), 5349, 3, 0.5, 2.0
#mg_biome_np_humidity = 50, 50, (500, 500, 500), 842, 3, 0.5, 2.0
-
diff --git a/src/defaultsettings.cpp b/src/defaultsettings.cpp
index 4fb99cd55..6504c5155 100644
--- a/src/defaultsettings.cpp
+++ b/src/defaultsettings.cpp
@@ -159,6 +159,7 @@ void set_default_settings(Settings *settings)
settings->setDefault("water_wave_speed", "5.0");
settings->setDefault("enable_waving_leaves", "false");
settings->setDefault("enable_waving_plants", "false");
+ settings->setDefault("ambient_occlusion_gamma", "2.2");
settings->setDefault("enable_shaders", "true");
settings->setDefault("repeat_rightclick_time", "0.25");
settings->setDefault("enable_particles", "true");
@@ -346,4 +347,3 @@ void override_default_settings(Settings *settings, Settings *from)
settings->setDefault(name, from->get(name));
}
}
-
diff --git a/src/mapblock_mesh.cpp b/src/mapblock_mesh.cpp
index 0e5a883f2..8afca73a5 100644
--- a/src/mapblock_mesh.cpp
+++ b/src/mapblock_mesh.cpp
@@ -288,9 +288,15 @@ static u16 getSmoothLightCombined(v3s16 p, MeshMakeData *data)
if (ambient_occlusion > 4)
{
- //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 ao_gamma = rangelim(
+ g_settings->getFloat("ambient_occlusion_gamma"), 0.25, 4.0);
+
+ // Table of gamma space multiply factors.
+ static const float light_amount[3] = {
+ powf(0.75, 1.0 / ao_gamma),
+ powf(0.5, 1.0 / ao_gamma),
+ powf(0.25, 1.0 / ao_gamma)
+ };
//calculate table index for gamma space multiplier
ambient_occlusion -= 5;
--
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