}
}
+static u32 calculateResultWear(const u32 uses, const u16 initial_wear)
+{
+ if (uses == 0) {
+ // Trivial case: Infinite uses
+ return 0;
+ }
+ /* Finite uses. This is not trivial,
+ as the maximum wear is not neatly evenly divisible by
+ most possible uses numbers. For example, for 128
+ uses, the calculation of wear is trivial, as
+ 65536 / 128 uses = 512 wear,
+ so the tool will get 512 wear 128 times in its lifetime.
+ But for a number like 130, this does not work:
+ 65536 / 130 uses = 504.123... wear.
+ Since wear must be an integer, we will get
+ 504*130 = 65520, which would lead to the wrong number
+ of uses.
+
+ Instead, we partition the "wear range" into blocks:
+ A block represents a single use and can be
+ of two possible sizes: normal and oversized.
+ A normal block is equal to floor(65536 / uses).
+ An oversized block is a normal block plus 1.
+ Then we determine how many oversized and normal
+ blocks we need and finally, whether we add
+ the normal wear or the oversized wear.
+
+ Example for 130 uses:
+ * Normal wear = 504
+ * Number of normal blocks = 114
+ * Oversized wear = 505
+ * Number of oversized blocks = 16
+
+ If we add everything together, we get:
+ 114*504 + 16*505 = 65536
+ */
+ u32 result_wear;
+ u32 wear_normal = ((U16_MAX+1) / uses);
+ // Will be non-zero if its not evenly divisible
+ u16 blocks_oversize = (U16_MAX+1) % uses;
+ // Whether to add one extra wear point in case
+ // of oversized wear.
+ u16 wear_extra = 0;
+ if (blocks_oversize > 0) {
+ u16 blocks_normal = uses - blocks_oversize;
+ /* When the wear has reached this value, we
+ know that wear_normal has been applied
+ for blocks_normal times, therefore,
+ only oversized blocks remain.
+ This also implies the raw tool wear number
+ increases a bit faster after this point,
+ but this should be barely noticable by the
+ player.
+ */
+ u16 wear_extra_at = blocks_normal * wear_normal;
+ if (initial_wear >= wear_extra_at) {
+ wear_extra = 1;
+ }
+ }
+ result_wear = wear_normal + wear_extra;
+ return result_wear;
+}
+
DigParams getDigParams(const ItemGroupList &groups,
- const ToolCapabilities *tp)
+ const ToolCapabilities *tp,
+ const u16 initial_wear)
{
+
// Group dig_immediate defaults to fixed time and no wear
if (tp->groupcaps.find("dig_immediate") == tp->groupcaps.cend()) {
switch (itemgroup_get(groups, "dig_immediate")) {
// Values to be returned (with a bit of conversion)
bool result_diggable = false;
float result_time = 0.0;
- float result_wear = 0.0;
+ u32 result_wear = 0;
std::string result_main_group;
int level = itemgroup_get(groups, "level");
if (!result_diggable || time < result_time) {
result_time = time;
result_diggable = true;
- if (cap.uses != 0)
- result_wear = 1.0 / cap.uses / pow(3.0, leveldiff);
- else
- result_wear = 0;
+ // The actual number of uses increases
+ // exponentially with leveldiff.
+ // If the levels are equal, real_uses equals cap.uses.
+ u32 real_uses = cap.uses * pow(3.0, leveldiff);
+ real_uses = MYMIN(real_uses, U16_MAX);
+ result_wear = calculateResultWear(real_uses, initial_wear);
result_main_group = groupname;
}
}
- u16 wear_i = U16_MAX * result_wear;
- return DigParams(result_diggable, result_time, wear_i, result_main_group);
+ return DigParams(result_diggable, result_time, result_wear, result_main_group);
}
HitParams getHitParams(const ItemGroupList &armor_groups,
- const ToolCapabilities *tp, float time_from_last_punch)
+ const ToolCapabilities *tp, float time_from_last_punch,
+ u16 initial_wear)
{
- s16 damage = 0;
+ s32 damage = 0;
float result_wear = 0.0f;
float punch_interval_multiplier =
rangelim(time_from_last_punch / tp->full_punch_interval, 0.0f, 1.0f);
damage += damageGroup.second * punch_interval_multiplier * armor / 100.0;
}
- if (tp->punch_attack_uses > 0)
- result_wear = 1.0f / tp->punch_attack_uses * punch_interval_multiplier;
+ if (tp->punch_attack_uses > 0) {
+ result_wear = calculateResultWear(tp->punch_attack_uses, initial_wear);
+ result_wear *= punch_interval_multiplier;
+ }
+ // Keep damage in sane bounds for simplicity
+ damage = rangelim(damage, -U16_MAX, U16_MAX);
- u16 wear_i = U16_MAX * result_wear;
+ u32 wear_i = (u32) result_wear;
return {damage, wear_i};
}
const ItemGroupList &armor_groups,
const ToolCapabilities *toolcap,
const ItemStack *punchitem,
- float time_from_last_punch
+ float time_from_last_punch,
+ u16 initial_wear
){
bool do_hit = true;
{
if(do_hit)
{
HitParams hitparams = getHitParams(armor_groups, toolcap,
- time_from_last_punch);
+ time_from_last_punch,
+ punchitem->wear);
result.did_punch = true;
result.wear = hitparams.wear;
result.damage = hitparams.hp;
projects / dragonfireclient.git / blobdiff