+DiggingProperties getDiggingProperties(const MaterialProperties *mp,
+ const ToolDiggingProperties *tp, float time_from_last_punch)
+{
+ if(mp->diggability == DIGGABLE_NOT)
+ return DiggingProperties(false, 0, 0);
+ if(mp->diggability == DIGGABLE_CONSTANT)
+ return DiggingProperties(true, mp->constant_time, 0);
+
+ float time = tp->basetime;
+ time += tp->dt_weight * mp->weight;
+ time += tp->dt_crackiness * mp->crackiness;
+ time += tp->dt_crumbliness * mp->crumbliness;
+ time += tp->dt_cuttability * mp->cuttability;
+ if(time < 0.2)
+ time = 0.2;
+
+ float durability = tp->basedurability;
+ durability += tp->dd_weight * mp->weight;
+ durability += tp->dd_crackiness * mp->crackiness;
+ durability += tp->dd_crumbliness * mp->crumbliness;
+ durability += tp->dd_cuttability * mp->cuttability;
+ if(durability < 1)
+ durability = 1;
+
+ if(time_from_last_punch < tp->full_punch_interval){
+ float f = time_from_last_punch / tp->full_punch_interval;
+ time /= f;
+ durability /= f;
+ }
+
+ float wear = 1.0 / durability;
+ u16 wear_i = 65535.*wear;
+ return DiggingProperties(true, time, wear_i);
+}