added the plant boost effect

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

@@ -5,7 +5,6 @@ import de.ellpeck.naturesaura.aura.Capabilities;
 import de.ellpeck.naturesaura.aura.item.IAuraRecharge;
 import de.ellpeck.naturesaura.blocks.tiles.TileEntityImpl;
 import de.ellpeck.naturesaura.compat.Compat;
-import net.minecraft.block.state.IBlockState;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.GlStateManager;
 import net.minecraft.client.renderer.RenderHelper;
@@ -19,6 +18,8 @@ import net.minecraft.util.EnumHand;
 import net.minecraft.util.SoundCategory;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
+import net.minecraft.world.chunk.IChunkProvider;
+import net.minecraft.world.gen.ChunkProviderServer;
 import net.minecraftforge.common.capabilities.Capability;
 import net.minecraftforge.common.capabilities.ICapabilityProvider;
 import net.minecraftforge.fml.relauncher.Side;
@@ -37,15 +38,26 @@ public final class Helper {
     public static void getTileEntitiesInArea(World world, BlockPos pos, int radius, Consumer<TileEntity> consumer) {
         for (int x = (pos.getX() - radius) >> 4; x <= (pos.getX() + radius) >> 4; x++) {
             for (int z = (pos.getZ() - radius) >> 4; z <= (pos.getZ() + radius) >> 4; z++) {
-                for (TileEntity tile : world.getChunk(x, z).getTileEntityMap().values()) {
+                if (isChunkLoaded(world, x, z)) {
-                    if (tile.getPos().distanceSq(pos) <= radius * radius) {
+                    for (TileEntity tile : world.getChunk(x, z).getTileEntityMap().values()) {
-                        consumer.accept(tile);
+                        if (tile.getPos().distanceSq(pos) <= radius * radius)
+                            consumer.accept(tile);
                     }
                 }
             }
         }
     }
 
+    // For some reason this method isn't public in World, but I also don't want to have to make a new BlockPos
+    // or use the messy MutableBlockPos system just to see if a chunk is loaded, so this will have to do I guess
+    public static boolean isChunkLoaded(World world, int x, int z) {
+        IChunkProvider provider = world.getChunkProvider();
+        if (provider instanceof ChunkProviderServer)
+            return ((ChunkProviderServer) provider).chunkExists(x, z);
+        else
+            return !provider.provideChunk(x, z).isEmpty();
+    }
+
     @SideOnly(Side.CLIENT)
     public static int blendColors(int c1, int c2, float ratio) {
         int a = (int) ((c1 >> 24 & 0xFF) * ratio + (c2 >> 24 & 0xFF) * (1 - ratio));

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

@@ -1,9 +1,11 @@
 package de.ellpeck.naturesaura.aura.chunk;
 
+import de.ellpeck.naturesaura.Helper;
 import de.ellpeck.naturesaura.NaturesAura;
 import de.ellpeck.naturesaura.aura.Capabilities;
 import de.ellpeck.naturesaura.aura.chunk.effect.GrassDieEffect;
 import de.ellpeck.naturesaura.aura.chunk.effect.IDrainSpotEffect;
+import de.ellpeck.naturesaura.aura.chunk.effect.PlantBoostEffect;
 import de.ellpeck.naturesaura.aura.chunk.effect.ReplenishingEffect;
 import de.ellpeck.naturesaura.packet.PacketAuraChunk;
 import de.ellpeck.naturesaura.packet.PacketHandler;
@@ -43,16 +45,19 @@ public class AuraChunk implements ICapabilityProvider, INBTSerializable<NBTTagCo
         this.chunk = chunk;
         this.effects.add(new ReplenishingEffect());
         this.effects.add(new GrassDieEffect());
+        this.effects.add(new PlantBoostEffect());
     }
 
     public static void getSpotsInArea(World world, BlockPos pos, int radius, BiConsumer<BlockPos, MutableInt> consumer) {
         world.profiler.func_194340_a(() -> NaturesAura.MOD_ID + ":getSpotsInArea");
         for (int x = (pos.getX() - radius) >> 4; x <= (pos.getX() + radius) >> 4; x++) {
             for (int z = (pos.getZ() - radius) >> 4; z <= (pos.getZ() + radius) >> 4; z++) {
-                Chunk chunk = world.getChunk(x, z);
+                if (Helper.isChunkLoaded(world, x, z)) {
-                if (chunk.hasCapability(Capabilities.auraChunk, null)) {
+                    Chunk chunk = world.getChunk(x, z);
-                    AuraChunk auraChunk = chunk.getCapability(Capabilities.auraChunk, null);
+                    if (chunk.hasCapability(Capabilities.auraChunk, null)) {
-                    auraChunk.getSpotsInArea(pos, radius, consumer);
+                        AuraChunk auraChunk = chunk.getCapability(Capabilities.auraChunk, null);
+                        auraChunk.getSpotsInArea(pos, radius, consumer);
+                    }
                 }
             }
         }

src/main/java/de/ellpeck/naturesaura/aura/chunk/effect/PlantBoostEffect.java

@@ -0,0 +1,56 @@
+package de.ellpeck.naturesaura.aura.chunk.effect;
+
+import de.ellpeck.naturesaura.NaturesAura;
+import de.ellpeck.naturesaura.aura.chunk.AuraChunk;
+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.init.Blocks;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.MathHelper;
+import net.minecraft.world.World;
+import net.minecraft.world.chunk.Chunk;
+import org.apache.commons.lang3.mutable.MutableInt;
+
+public class PlantBoostEffect implements IDrainSpotEffect {
+    @Override
+    public void update(World world, Chunk chunk, AuraChunk auraChunk, BlockPos pos, MutableInt spot) {
+        world.profiler.func_194340_a(() -> NaturesAura.MOD_ID + ":PlantBoostEffect");
+        if (spot.intValue() <= 0)
+            return;
+        int aura = AuraChunk.getAuraInArea(world, pos, 25);
+        if (aura <= 0)
+            return;
+        int amount = Math.min(45, Math.abs(aura) / 1000);
+        if (amount <= 0)
+            return;
+        int dist = MathHelper.clamp(Math.abs(aura) / 1500, 5, 35);
+        if (dist <= 0)
+            return;
+
+        for (int i = amount / 2 + world.rand.nextInt(amount / 2); i >= 0; i--) {
+            int x = MathHelper.floor(pos.getX() + world.rand.nextGaussian() * dist);
+            int z = MathHelper.floor(pos.getZ() + world.rand.nextGaussian() * dist);
+            BlockPos plantPos = new BlockPos(x, world.getHeight(x, z), z);
+            if (plantPos.distanceSq(pos) <= dist * dist && world.isBlockLoaded(plantPos)) {
+                IBlockState state = world.getBlockState(plantPos);
+                Block block = state.getBlock();
+                if (block instanceof IGrowable && block != Blocks.TALLGRASS && block != Blocks.GRASS) {
+                    IGrowable growable = (IGrowable) block;
+                    if (growable.canGrow(world, plantPos, state, false)) {
+                        growable.grow(world, world.rand, plantPos, state);
+
+                        BlockPos closestSpot = AuraChunk.getClosestSpot(world, plantPos, 25, pos);
+                        AuraChunk.getAuraChunk(world, closestSpot).drainAura(closestSpot, 25);
+
+                        PacketHandler.sendToAllAround(world, plantPos, 32,
+                                new PacketParticles(plantPos.getX(), plantPos.getY(), plantPos.getZ(), 6));
+                    }
+                }
+            }
+        }
+        world.profiler.endSection();
+    }
+}

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

@@ -144,6 +144,16 @@ public class PacketParticles implements IMessage {
                                         }
                             }
                             break;
+                        case 6: // Plant boost effect
+                            for (int i = world.rand.nextInt(20) + 15; i >= 0; i--)
+                                NaturesAura.proxy.spawnMagicParticle(world,
+                                        message.posX + world.rand.nextFloat(),
+                                        message.posY + 0.25F + world.rand.nextFloat() * 0.5F,
+                                        message.posZ + world.rand.nextFloat(),
+                                        0F, world.rand.nextFloat() * 0.01F, 0F,
+                                        0x5ccc30, 1F + world.rand.nextFloat() * 2F, 100, 0F, false, true);
+
+                            break;
                     }
                 }
             });

src/main/resources/assets/naturesaura/patchouli_books/book/en_us/entries/effects/plant_boost.json

@@ -0,0 +1,16 @@
+{
+    "name": "Vegetational Increase",
+    "icon": "minecraft:wheat_seeds",
+    "category": "effects",
+    "advancement": "naturesaura:potion_generator",
+    "pages": [
+        {
+            "type": "text",
+            "text": "When the amount of $(aura) in an area is high enough for it to become unstable, it starts to migrate into parts of vegetation that is close by, specifically plants like $(item)Wheat$(), $(item)Potatoes$() and so on. This will cause them to have $(thing)growth spurts$(), while, at the same time, causing the $(aura) in the area to slightly decrease as a result."
+        },
+        {
+            "type":"text",
+            "text":"Effects like these become apparent around the time that the meter of the $(l:items/eye)Environmental Eye$() fills up fully."
+        }
+    ]
+}