+ state->g_day_phase = state->g_day_phase * 0.5f + 0.5f;
+ state->g_sunset_phase = powf( state->g_sunset_phase * 0.5f + 0.5f, 6.0f );
+
+ float a = state->g_time_of_day * VG_PIf * 2.0f;
+ state->g_sun_dir[0] = sinf( a );
+ state->g_sun_dir[1] = cosf( a );
+ state->g_sun_dir[2] = 0.2f;
+ v3_normalize( state->g_sun_dir );
+
+
+ world->probabilities[ k_probability_curve_constant ] = 1.0f;
+
+ float dp = state->g_day_phase;
+
+ world->probabilities[ k_probability_curve_wildlife_day ] =
+ (dp*dp*0.8f+state->g_sunset_phase)*0.8f;
+ world->probabilities[ k_probability_curve_wildlife_night ] =
+ 1.0f-powf(fabsf((state->g_time_of_day-0.5f)*5.0f),5.0f);
+
+
+ glBindBuffer( GL_UNIFORM_BUFFER, world->ubo_lighting );
+ glBufferSubData( GL_UNIFORM_BUFFER, 0,
+ sizeof(struct ub_world_lighting), &world->ub_lighting );