76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
#include "reward.hpp"
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#include "../../../util/math.hpp"
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using namespace game::util;
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namespace game::state::play::item
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{
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int Reward::random_item_get(const resource::xml::Item& itemSchema, float chanceBonus)
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{
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const resource::xml::Item::Pool* pool{};
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auto totalWeight = 0.0f;
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for (auto& id : itemSchema.rarityIDs)
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{
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auto& rarity = itemSchema.rarities[id];
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if (rarity.weight <= 0.0f) continue;
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totalWeight += rarity.weight * chanceBonus;
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}
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if (totalWeight <= 0.0f) return INVALID_ID;
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auto roll = math::random_roll(totalWeight);
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for (auto& id : itemSchema.rarityIDs)
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{
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auto& rarity = itemSchema.rarities[id];
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auto weight = rarity.weight * chanceBonus;
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if (weight <= 0.0f) continue;
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roll -= weight;
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if (roll <= 0.0f)
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{
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pool = &itemSchema.pools.at(id);
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rarity.sound.play();
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break;
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}
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}
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if (!pool || pool->empty()) return INVALID_ID;
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return (*pool)[(int)math::random_roll((float)pool->size())];
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}
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void Reward::item_give(int itemID, menu::Inventory& inventory, menu::ItemEffectManager& itemEffectManager,
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const resource::xml::Item& itemSchema, const ImVec4& bounds, menu::ItemEffectManager::Mode mode)
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{
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if (itemID < 0) return;
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inventory.values[itemID]++;
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itemEffectManager.spawn(itemID, itemSchema, bounds, mode);
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}
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int Reward::reward_random_items_try(menu::Inventory& inventory, menu::ItemEffectManager& itemEffectManager,
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const resource::xml::Item& itemSchema, const ImVec4& bounds, float rewardChance,
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float rewardRollCount, menu::ItemEffectManager::Mode mode)
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{
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auto rollCountWhole = std::max(0, (int)std::floor(rewardRollCount));
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auto rollCountFraction = std::max(0.0f, rewardRollCount - (float)rollCountWhole);
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auto rollCount = rollCountWhole + (math::random_percent_roll(rollCountFraction) ? 1 : 0);
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auto rewardedItemCount = 0;
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for (int i = 0; i < rollCount; i++)
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{
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if (!math::random_percent_roll(rewardChance)) continue;
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auto itemID = random_item_get(itemSchema);
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if (itemID == INVALID_ID) continue;
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item_give(itemID, inventory, itemEffectManager, itemSchema, bounds, mode);
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rewardedItemCount++;
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}
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return rewardedItemCount;
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}
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}
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