minetest.git - modified minetest for gpcfs purposes

	Commit message (Expand)	Author	Age
*	Update translation strings	updatepo.sh	2019-10-12
*	Update from Weblate (hacky)	Translators	2019-10-12
*	Update translation strings	updatepo.sh	2019-09-09
*	Run updatepo.sh	Translations	2019-02-24
*	Update minetest.conf.example, settings strings and locale files (#8230)	Wuzzy	2019-02-14
*	Run updatepo.sh	Translation	2019-02-14
*	Cleanup translation files	Loïc Blot	2019-01-28
*	Update translations	Translations	2019-01-27

that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "light.h" #include <cmath> #include "util/numeric.h" #include "settings.h" #ifndef SERVER static u8 light_LUT[LIGHT_SUN + 1]; // The const ref to light_LUT is what is actually used in the code const u8 *light_decode_table = light_LUT; // Initialize or update the light value tables using the specified gamma void set_light_table(float gamma) { // Lighting curve derivatives const float alpha = g_settings->getFloat("lighting_alpha"); const float beta = g_settings->getFloat("lighting_beta"); // Lighting curve coefficients const float a = alpha + beta - 2.0f; const float b = 3.0f - 2.0f * alpha - beta; const float c = alpha; // Mid boost const float d = g_settings->getFloat("lighting_boost"); const float e = g_settings->getFloat("lighting_boost_center"); const float f = g_settings->getFloat("lighting_boost_spread"); // Gamma correction gamma = rangelim(gamma, 0.5f, 3.0f); for (size_t i = 0; i < LIGHT_SUN; i++) { float x = i; x /= LIGHT_SUN; float brightness = a * x * x * x + b * x * x + c * x; float boost = d * std::exp(-((x - e) * (x - e)) / (2.0f * f * f)); brightness = powf(brightness + boost, 1.0f / gamma); light_LUT[i] = rangelim((u32)(255.0f * brightness), 0, 255); if (i > 1 && light_LUT[i] <= light_LUT[i - 1]) light_LUT[i] = light_LUT[i - 1] + 1; } light_LUT[LIGHT_SUN] = 255; } #endif