added a nice looking aura effect

src/main/java/de/ellpeck/naturesaura/ModConfig.java

@@ -60,13 +60,13 @@ public final class ModConfig {
         @Comment("The percentage of particles that should be displayed, where 1 is 100% and 0 is 0%")
         @RangeDouble(min = 0, max = 1)
         public double particleAmount = 1;
-
         @Comment("If particle spawning should respect the particle setting in Minecraft's video settings screen")
         public boolean respectVanillaParticleSettings = true;
+        @Comment("The percentage of particles that should spawn when there is an excess amount of Aura in the environment, where 1 is 100% and 0 is 0%")
+        public double excessParticleAmount = 1;
 
         @Comment("If debug information about Aura around the player should be displayed in the F3 debug menu if the player is in creative mode")
         public boolean debugText = true;
-
         @Comment("If, when the F3 debug menu is open and the player is in creative mode, every Aura spot should be highlighted in the world for debug purposes")
         public boolean debugWorld = false;
     }

src/main/java/de/ellpeck/naturesaura/chunk/AuraChunk.java

@@ -61,9 +61,8 @@ public class AuraChunk implements IAuraChunk {
             return 0;
         MutableInt spot = this.getActualDrainSpot(pos, true);
         int curr = spot.intValue();
-        if (curr < 0 && curr - amount > 0) { // Underflow protection
+        if (curr < 0 && curr - amount > 0) // Underflow protection
             return this.drainAura(pos.up(), amount, aimForZero, simulate);
-        }
         if (aimForZero) {
             if (curr > 0 && curr - amount < 0)
                 amount = curr;

src/main/java/de/ellpeck/naturesaura/chunk/effect/DrainSpotEffects.java

@@ -14,6 +14,7 @@ public final class DrainSpotEffects {
         NaturesAuraAPI.DRAIN_SPOT_EFFECTS.put(SpreadEffect.NAME, SpreadEffect::new);
         NaturesAuraAPI.DRAIN_SPOT_EFFECTS.put(CacheRechargeEffect.NAME, CacheRechargeEffect::new);
         NaturesAuraAPI.DRAIN_SPOT_EFFECTS.put(AnimalEffect.NAME, AnimalEffect::new);
+        NaturesAuraAPI.DRAIN_SPOT_EFFECTS.put(NiceLookingEffect.NAME, NiceLookingEffect::new);
 
         NaturesAuraAPI.EFFECT_POWDERS.put(PlantBoostEffect.NAME, 0xc2f442);
         NaturesAuraAPI.EFFECT_POWDERS.put(CacheRechargeEffect.NAME, 0x1fb0d1);

src/main/java/de/ellpeck/naturesaura/chunk/effect/NiceLookingEffect.java

@@ -0,0 +1,67 @@
+package de.ellpeck.naturesaura.chunk.effect;
+
+import de.ellpeck.naturesaura.NaturesAura;
+import de.ellpeck.naturesaura.api.NaturesAuraAPI;
+import de.ellpeck.naturesaura.api.aura.chunk.IAuraChunk;
+import de.ellpeck.naturesaura.api.aura.chunk.IDrainSpotEffect;
+import de.ellpeck.naturesaura.api.aura.type.IAuraType;
+import de.ellpeck.naturesaura.packet.PacketHandler;
+import de.ellpeck.naturesaura.packet.PacketParticles;
+import net.minecraft.block.Block;
+import net.minecraft.block.IGrowable;
+import net.minecraft.block.state.IBlockState;
+import net.minecraft.util.ResourceLocation;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
+import net.minecraft.world.chunk.Chunk;
+import net.minecraftforge.common.IPlantable;
+import org.apache.commons.lang3.mutable.MutableInt;
+
+public class NiceLookingEffect implements IDrainSpotEffect {
+
+    public static final ResourceLocation NAME = new ResourceLocation(NaturesAura.MOD_ID, "nice_looking");
+
+    @Override
+    public void update(World world, Chunk chunk, IAuraChunk auraChunk, BlockPos pos, Integer spot) {
+        if (spot < 0)
+            return;
+        MutableInt aura = new MutableInt();
+        MutableInt spots = new MutableInt();
+        IAuraChunk.getSpotsInArea(world, pos, 35, (otherSpot, otherAmount) -> {
+            spots.add(1);
+            aura.add(otherAmount);
+        });
+        int excess = aura.intValue();
+        if (excess <= 0)
+            return;
+        int amount = Math.min(50, excess / 400);
+        if (amount < 2)
+            return;
+        if (spots.intValue() > 1)
+            amount = Math.max(2, amount / (spots.intValue() - 1));
+        for (int i = amount + world.rand.nextInt(amount / 2); i > 1; i--) {
+            if (world.rand.nextFloat() >= 0.25F)
+                continue;
+            int x = pos.getX() + world.rand.nextInt(32) - 16;
+            int z = pos.getZ() + world.rand.nextInt(32) - 16;
+            BlockPos plantPos = new BlockPos(x, world.getHeight(x, z) - 1, z);
+            if (!world.isBlockLoaded(plantPos))
+                continue;
+            IBlockState state = world.getBlockState(plantPos);
+            Block block = state.getBlock();
+            if (block instanceof IGrowable || block instanceof IPlantable || block.isLeaves(state, world, plantPos))
+                PacketHandler.sendToAllAround(world, plantPos, 32,
+                        new PacketParticles(plantPos.getX(), plantPos.getY(), plantPos.getZ(), 21, excess));
+        }
+    }
+
+    @Override
+    public boolean appliesHere(Chunk chunk, IAuraChunk auraChunk, IAuraType type) {
+        return type == NaturesAuraAPI.TYPE_OVERWORLD;
+    }
+
+    @Override
+    public ResourceLocation getName() {
+        return NAME;
+    }
+}

src/main/java/de/ellpeck/naturesaura/packet/PacketParticles.java

@@ -1,5 +1,6 @@
 package de.ellpeck.naturesaura.packet;
 
+import de.ellpeck.naturesaura.ModConfig;
 import de.ellpeck.naturesaura.NaturesAura;
 import de.ellpeck.naturesaura.api.NaturesAuraAPI;
 import de.ellpeck.naturesaura.blocks.multi.Multiblocks;
@@ -337,6 +338,22 @@ public class PacketParticles implements IMessage {
                                     return true;
                                 });
                             break;
+                        case 21: // Nice looking effect
+                            int excess = message.data[0];
+                            double setting = ModConfig.client.excessParticleAmount;
+                            if (setting >= 1 || world.rand.nextFloat() <= setting)
+                                NaturesAuraAPI.instance().spawnMagicParticle(
+                                        message.posX + world.rand.nextFloat(),
+                                        message.posY + world.rand.nextFloat(),
+                                        message.posZ + world.rand.nextFloat(),
+                                        world.rand.nextGaussian() * 0.01F,
+                                        world.rand.nextFloat() * 0.025F,
+                                        world.rand.nextGaussian() * 0.01F,
+                                        BiomeColorHelper.getFoliageColorAtPos(world, new BlockPos(message.posX, message.posY, message.posZ)),
+                                        Math.min(2F, 0.5F + world.rand.nextFloat() * (excess / 1000F)),
+                                        Math.min(300, 100 + world.rand.nextInt(excess / 30 + 1)),
+                                        0F, false, true);
+                            break;
                     }
                 }
             });