feat: add xorshift and rollBelow
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dualfroz committed
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b5f12ab274
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529853153c
1 file changed
+158
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#include "vf/Enchant.h"
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#include <algorithm>
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#include <cmath>
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namespace vf {
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namespace {
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uint32_t xorshift(uint32_t& state) {
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state ^= state << 13;
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state ^= state >> 17;
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state ^= state << 5;
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return state;
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}
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int rollBelow(uint32_t& rng, int bound) {
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if (bound <= 1) return 0;
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return static_cast<int>(xorshift(rng) % static_cast<uint32_t>(bound));
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}
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float unitFloat(uint32_t& rng) { return static_cast<float>(xorshift(rng)) / 4294967295.0f; }
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bool isProtectionFamily(EnchantKind kind) {
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return kind == EnchantKind::Protection || kind == EnchantKind::FireProtection ||
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kind == EnchantKind::BlastProtection || kind == EnchantKind::ProjectileProtection;
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}
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bool isDamageFamily(EnchantKind kind) {
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return kind == EnchantKind::Sharpness || kind == EnchantKind::Smite ||
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kind == EnchantKind::BaneOfArthropods;
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}
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bool isArmourTarget(Enchantment::Target target) {
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return target == Enchantment::Target::Helmet || target == Enchantment::Target::Chestplate ||
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target == Enchantment::Target::Leggings || target == Enchantment::Target::Boots;
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}
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bool isDiggerTarget(Enchantment::Target target) {
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return target == Enchantment::Target::Pickaxe || target == Enchantment::Target::Shovel ||
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target == Enchantment::Target::Axe;
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}
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int levelSpan(int base, int step, int level) { return base + (level - 1) * step; }
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} // namespace
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int maxEnchantLevel(EnchantKind kind) {
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switch (kind) {
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case EnchantKind::Protection:
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case EnchantKind::FireProtection:
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case EnchantKind::BlastProtection:
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case EnchantKind::ProjectileProtection:
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case EnchantKind::FeatherFalling: return 4;
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case EnchantKind::Respiration:
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case EnchantKind::Thorns:
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case EnchantKind::Looting:
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case EnchantKind::Unbreaking:
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case EnchantKind::Fortune: return 3;
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case EnchantKind::AquaAffinity:
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case EnchantKind::SilkTouch:
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case EnchantKind::Flame:
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case EnchantKind::Infinity:
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case EnchantKind::Mending: return 1;
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case EnchantKind::Knockback:
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case EnchantKind::FireAspect:
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case EnchantKind::Punch: return 2;
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case EnchantKind::Sharpness:
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case EnchantKind::Smite:
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case EnchantKind::BaneOfArthropods:
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case EnchantKind::Efficiency:
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case EnchantKind::Power: return 5;
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default: return 1;
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}
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}
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int enchantWeight(EnchantKind kind) {
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switch (kind) {
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case EnchantKind::Protection:
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case EnchantKind::Sharpness:
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case EnchantKind::Efficiency:
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case EnchantKind::Power: return 10;
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case EnchantKind::FireProtection:
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case EnchantKind::ProjectileProtection:
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case EnchantKind::FeatherFalling:
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case EnchantKind::Smite:
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case EnchantKind::BaneOfArthropods:
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case EnchantKind::Knockback:
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case EnchantKind::Unbreaking: return 5;
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case EnchantKind::BlastProtection:
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case EnchantKind::Respiration:
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case EnchantKind::AquaAffinity:
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case EnchantKind::FireAspect:
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case EnchantKind::Looting:
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case EnchantKind::Fortune:
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case EnchantKind::Punch:
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case EnchantKind::Flame:
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case EnchantKind::Mending: return 2;
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default: return 1;
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}
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}
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int anvilCostMultiplier(EnchantKind kind) {
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switch (enchantWeight(kind)) {
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case 10: return 1;
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case 5: return 2;
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case 2: return 4;
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default: return 8;
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}
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}
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int enchantMinCost(EnchantKind kind, int level) {
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switch (kind) {
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case EnchantKind::Protection: return levelSpan(1, 11, level);
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case EnchantKind::FireProtection: return levelSpan(10, 8, level);
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case EnchantKind::BlastProtection: return levelSpan(5, 8, level);
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case EnchantKind::ProjectileProtection: return levelSpan(3, 6, level);
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case EnchantKind::FeatherFalling: return levelSpan(5, 6, level);
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case EnchantKind::Respiration: return 10 * level;
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case EnchantKind::AquaAffinity: return 1;
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case EnchantKind::Thorns: return levelSpan(10, 20, level);
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case EnchantKind::Sharpness: return levelSpan(1, 11, level);
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case EnchantKind::Smite: return levelSpan(5, 8, level);
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case EnchantKind::BaneOfArthropods: return levelSpan(5, 8, level);
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case EnchantKind::Knockback: return levelSpan(5, 20, level);
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case EnchantKind::FireAspect: return levelSpan(10, 20, level);
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case EnchantKind::Looting: return levelSpan(15, 9, level);
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case EnchantKind::Efficiency: return levelSpan(1, 10, level);
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case EnchantKind::SilkTouch: return 15;
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case EnchantKind::Unbreaking: return levelSpan(5, 8, level);
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case EnchantKind::Fortune: return levelSpan(15, 9, level);
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case EnchantKind::Power: return levelSpan(1, 10, level);
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case EnchantKind::Punch: return levelSpan(12, 20, level);
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case EnchantKind::Flame: return 20;
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case EnchantKind::Infinity: return 20;
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case EnchantKind::Mending: return 25 * level;
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default: return 1;
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}
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}
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int enchantMaxCost(EnchantKind kind, int level) {
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switch (kind) {
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case EnchantKind::Protection: return enchantMinCost(kind, level) + 11;
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case EnchantKind::FireProtection:
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case EnchantKind::BlastProtection: return enchantMinCost(kind, level) + 8;
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case EnchantKind::ProjectileProtection:
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case EnchantKind::FeatherFalling: return enchantMinCost(kind, level) + 6;
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case EnchantKind::Respiration: return enchantMinCost(kind, level) + 30;
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case EnchantKind::AquaAffinity: return 41;
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case EnchantKind::Sharpness:
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case EnchantKind::Smite:
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case EnchantKind::BaneOfArthropods: return enchantMinCost(kind, level) + 20;
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case EnchantKind::Power: return enchantMinCost(kind, level) + 15;
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case EnchantKind::Punch: return enchantMinCost(kind, level) + 25;
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default: return enchantMinCost(kind, level) + 50;
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}
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}
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