class="kw">package com.hypixel.hytale.builtin.hytalegenerator.biometransitionutils;

class="kw">import com.hypixel.hytale.builtin.hytalegenerator.engine.stages.BiomeDistanceStage;
class="kw">import javax.annotation.Nonnull;

class="kw">public class BiomeTransitionUtil {
   class="kw">public class="kw">static class="kw">final double ORIGIN_REACH = 1.0;
   class="kw">public class="kw">static class="kw">final double ORIGIN_REACH_HALF = 0.5;
   class="kw">public class="kw">static class="kw">final double QUARTER_PI = Math.PI / 4;

   class="kw">public BiomeTransitionUtil() {
   }

   class="kw">private class="kw">static double areaUnderCircleCurve(double var0) {
      if (var0 < 0.0) {
         class="kw">return 0.0;
      } else {
         class="kw">return var0 > 1.0 ? Math.PI / 4 : 0.5 * (var0 * Math.sqrt(1.0 - var0 * var0) + Math.asin(var0));
      }
   }

   class="kw">private class="kw">static double areaUnderCircleCurve(double var0, double var2, double var4) {
      assert var4 >= 0.0;
      assert var0 <= var2;
      var0 /= var4;
      var2 /= var4;
      class="kw">return var4 * var4 * (areaUnderCircleCurve(var2) - areaUnderCircleCurve(var0));
   }

   @Nonnull
   class="kw">public class="kw">static BiomeWeights createWeights(@Nonnull BiomeDistanceStage.BiomeDistanceEntries var0, int var1, double var2) {
      double var4 = var2 + 0.5;
      BiomeWeights var6 = new BiomeWeights();
      int var7 = 0;
      double var8 = Double.MAX_VALUE;
      double var10 = 0.0;

      for (int var12 = 0; var12 < var0.entries.size(); var12++) {
         BiomeDistanceStage.BiomeDistanceEntry var13 = var0.entries.get(var12);
         BiomeWeights.Entry var14 = new BiomeWeights.Entry();
         if (!(var13.distance_voxelGrid >= var2)) {
            if (var13.biomeId == var1) {
               var7 = var6.entries.size();
            } else if (var13.distance_voxelGrid < var8) {
               var8 = var13.distance_voxelGrid;
            }

            var14.biomeId = var13.biomeId;
            var14.weight = (float)areaUnderCircleCurve(var13.distance_voxelGrid, var4, var4);
            var6.entries.add(var14);
            var10 += var14.weight;
         }
      }

      if (var6.entries.size() > 0) {
         BiomeWeights.Entry var17 = var6.entries.get(var7);
         double var19 = 0.5 + var8;
         double var15 = areaUnderCircleCurve(0.0, var19, var4);
         var17.weight += (float)var15;
         var10 += var15;
      }

      for (BiomeWeights.Entry var20 : var6.entries) {
         var20.weight /= (float)var10;
      }

      class="kw">return var6;
   }
}