Fix crash - advtrains.git - Advtrains mod for minetest.

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author	orwell96 <mono96.mml@gmail.com>	2018-01-17 20:15:06 +0100
committer	GitHub <noreply@github.com>	2018-01-17 20:15:06 +0100
commit	8ef6e9a52924a77b7479690817d416eb2e85722f (patch)
tree	32ac27bd4e95d8f5ab69ae18891e74c78efa86c5 /advtrains_itrainmap
parent	fa7f05fd0cc3d4824a442cfab62d01e349b2e296 (diff)
download	advtrains-8ef6e9a52924a77b7479690817d416eb2e85722f.tar.gz advtrains-8ef6e9a52924a77b7479690817d416eb2e85722f.tar.bz2 advtrains-8ef6e9a52924a77b7479690817d416eb2e85722f.zip

Fix crash

IDK why this happens, but it's not important.

Diffstat (limited to 'advtrains_itrainmap')

0 files changed, 0 insertions, 0 deletions

ppc"> #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; struct LightingParams { float a, b, c; // polynomial coefficients float boost, center, sigma; // normal boost parameters float gamma; }; static LightingParams params; float decode_light_f(float x) { if (x >= 1.0f) // x is equal to 1.0f half the time return 1.0f; x = std::fmax(x, 0.0f); float brightness = ((params.a * x + params.b) * x + params.c) * x; brightness += params.boost * std::exp(-0.5f * sqr((x - params.center) / params.sigma)); if (brightness <= 0.0f) // may happen if parameters are insane return 0.0f; if (brightness >= 1.0f) return 1.0f; return powf(brightness, 1.0f / params.gamma); } // 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 params.a = alpha + beta - 2.0f; params.b = 3.0f - 2.0f * alpha - beta; params.c = alpha; // Mid boost params.boost = g_settings->getFloat("lighting_boost"); params.center = g_settings->getFloat("lighting_boost_center"); params.sigma = g_settings->getFloat("lighting_boost_spread"); // Gamma correction params.gamma = rangelim(gamma, 0.5f, 10.0f); // Boundary values should be fixed light_LUT[0] = 0; light_LUT[LIGHT_SUN] = 255; for (size_t i = 1; i < LIGHT_SUN; i++) { float brightness = decode_light_f((float)i / LIGHT_SUN); // Strictly speaking, rangelim is not necessary here—if the implementation // is conforming. But we don’t want problems in any case. light_LUT[i] = rangelim((s32)(255.0f * brightness), 0, 255); // Ensure light brightens with each level if (i > 1 && light_LUT[i] <= light_LUT[i - 1]) light_LUT[i] = light_LUT[i - 1] + 1; } } #endif


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