redpower/src/main/java/com/eloraam/redpower/core/EnvironLib.java

package com.eloraam.redpower.core;

import net.minecraft.world.World;
import net.minecraft.world.WorldType;
import net.minecraft.world.biome.BiomeGenBase;

public class EnvironLib {
   public static double getWindSpeed(World world, WorldCoord wc) {
      if (world.provider.isHellWorld) {
         return 0.5;
      } else {
         double nv = FractalLib.noise1D(2576710L, (double)world.getWorldTime() * 1.0E-4, 0.6F, 5);
         nv = Math.max(0.0, 1.6 * (nv - 0.5) + 0.5);
         if (world.getWorldInfo().getTerrainType() != WorldType.FLAT) {
            nv *= Math.sqrt((double)wc.y) / 16.0;
         }

         BiomeGenBase bgb = world.getBiomeGenForCoords(wc.x, wc.z);
         if (bgb.canSpawnLightningBolt()) {
            if (world.isThundering()) {
               return 4.0 * nv;
            }

            if (world.isRaining()) {
               return 0.5 + 0.5 * nv;
            }
         }

         return nv;
      }
   }
}