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135
common/src/main/java/dev/dubhe/anvilcraft/data/recipe/anvil/outcome/SelectOne.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,135 @@ | ||
| package dev.dubhe.anvilcraft.data.recipe.anvil.outcome; | ||
|
|
||
| import com.google.gson.JsonArray; | ||
| import com.google.gson.JsonElement; | ||
| import com.google.gson.JsonObject; | ||
| import dev.dubhe.anvilcraft.data.recipe.anvil.AnvilCraftingContainer; | ||
| import dev.dubhe.anvilcraft.data.recipe.anvil.RecipeOutcome; | ||
| import lombok.Getter; | ||
| import net.minecraft.network.FriendlyByteBuf; | ||
| import net.minecraft.util.GsonHelper; | ||
| import net.minecraft.util.RandomSource; | ||
| import org.jetbrains.annotations.NotNull; | ||
| import org.jetbrains.annotations.Nullable; | ||
|
|
||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
|
|
||
| @Getter | ||
| public class SelectOne implements RecipeOutcome { | ||
| private final String type = "select_one"; | ||
| private final double chance; | ||
| private final List<RecipeOutcome> outcomes = new ArrayList<>(); | ||
|
|
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| public SelectOne add(RecipeOutcome outcome) { | ||
| this.outcomes.add(outcome); | ||
| return this; | ||
| } | ||
|
|
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| public SelectOne(double chance) { | ||
| this.chance = chance; | ||
| } | ||
|
|
||
| public SelectOne() { | ||
| this(1.0); | ||
| } | ||
|
|
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| /** | ||
| * @param buffer 缓冲区 | ||
| */ | ||
| public SelectOne(@NotNull FriendlyByteBuf buffer) { | ||
| this(buffer.readDouble()); | ||
| for (int i = 0; i < buffer.readVarInt(); i++) { | ||
| this.add(RecipeOutcome.fromNetwork(buffer)); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * @param serializedRecipe 序列化配方 | ||
| */ | ||
| public SelectOne(@NotNull JsonObject serializedRecipe) { | ||
| if (serializedRecipe.has("chance")) { | ||
| this.chance = GsonHelper.getAsDouble(serializedRecipe, "chance"); | ||
| } else this.chance = 1.0; | ||
| if (!serializedRecipe.has("outcomes")) return; | ||
| for (JsonElement element : GsonHelper.getAsJsonArray(serializedRecipe, "outcomes")) { | ||
| if (element instanceof JsonObject object) this.add(RecipeOutcome.fromJson(object)); | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public boolean process(@NotNull AnvilCraftingContainer container) { | ||
| RandomSource random = container.getLevel().random; | ||
| List<Double> weights = this.outcomes.stream().map(RecipeOutcome::getChance).toList(); | ||
| RecipeOutcome outcome = SelectOne.weightedRandomSelect(this.outcomes, weights, random); | ||
| if (outcome != null) outcome.process(container); | ||
| return true; | ||
| } | ||
|
|
||
| private static @Nullable <T> T weightedRandomSelect( | ||
| @NotNull List<T> elements, @NotNull List<Double> weights, RandomSource random | ||
| ) { | ||
| if (elements.size() != weights.size()) { | ||
| throw new IllegalArgumentException("Elements and weights must be of the same size"); | ||
| } | ||
|
|
||
| // 计算权重总和 | ||
| double totalWeight = weights.stream().mapToDouble(Double::doubleValue).sum(); | ||
|
|
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| // 创建累积概率数组 | ||
| List<Double> cumulativeProbabilities = new ArrayList<>(); | ||
| double cumulativeSum = 0; | ||
| for (double weight : weights) { | ||
| cumulativeSum += weight / totalWeight; // 归一化处理 | ||
| cumulativeProbabilities.add(cumulativeSum); | ||
| } | ||
|
|
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| double randomWeight = random.nextDouble(); // 生成0到1之间的随机浮点数 | ||
|
|
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| // 使用二分搜索找到对应的元素 | ||
| int index = binarySearch(cumulativeProbabilities, randomWeight); | ||
| if (index < 0 || index >= elements.size()) return null; | ||
| return elements.get(index); | ||
| } | ||
|
|
||
| private static int binarySearch(@NotNull List<Double> cumulativeProbabilities, double value) { | ||
| int low = 0; | ||
| int high = cumulativeProbabilities.size() - 1; | ||
|
|
||
| while (low <= high) { | ||
| int mid = (low + high) / 2; | ||
| if (cumulativeProbabilities.get(mid) < value) { | ||
| low = mid + 1; | ||
| } else if (mid > 0 && cumulativeProbabilities.get(mid - 1) >= value) { | ||
| high = mid - 1; | ||
| } else { | ||
| return mid; | ||
| } | ||
| } | ||
| return -1; // 如果权重正确，则永远不应该到达这里 | ||
| } | ||
|
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|
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| @Override | ||
| public void toNetwork(@NotNull FriendlyByteBuf buffer) { | ||
| buffer.writeUtf(this.getType()); | ||
| buffer.writeDouble(this.chance); | ||
| buffer.writeVarInt(this.outcomes.size()); | ||
| for (RecipeOutcome outcome : this.outcomes) { | ||
| outcome.toNetwork(buffer); | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public JsonElement toJson() { | ||
| JsonObject object = new JsonObject(); | ||
| object.addProperty("type", this.getType()); | ||
| object.addProperty("chance", this.chance); | ||
| JsonArray outcomes = new JsonArray(); | ||
| for (RecipeOutcome outcome : this.outcomes) { | ||
| outcomes.add(outcome.toJson()); | ||
| } | ||
| object.add("outcomes", outcomes); | ||
| return object; | ||
| } | ||
| } |
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