Check if can break and replace blocks. Breaking only works if your current held tool can break it. Replace only works with blocks that can be harvested with your hand.

Damages used tool appropriately.
Added block outlines to mirror and array.

build.gradle

@@ -11,7 +11,7 @@ apply plugin: 'net.minecraftforge.gradle.forge'
 //Only edit below this line, the above code adds and enables the necessary things for Forge to be setup.
 
 
-version = "0.1.3"
+version = "0.2"
 group = "nl.requios.effortlessbuilding" // http://maven.apache.org/guides/mini/guide-naming-conventions.html
 archivesBaseName = "effortlessbuilding"
 

src/main/java/nl/requios/effortlessbuilding/Array.java

@@ -2,17 +2,25 @@ package nl.requios.effortlessbuilding;
 
 import net.minecraft.block.Block;
 import net.minecraft.block.state.IBlockState;
+import net.minecraft.client.Minecraft;
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.item.ItemStack;
 import net.minecraft.util.EnumFacing;
 import net.minecraft.util.EnumHand;
 import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.RayTraceResult;
 import net.minecraft.util.math.Vec3i;
 import net.minecraft.world.World;
+import net.minecraftforge.client.event.RenderWorldLastEvent;
 import net.minecraftforge.event.world.BlockEvent;
+import net.minecraftforge.fml.common.Mod;
+import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
+import net.minecraftforge.fml.relauncher.Side;
+import net.minecraftforge.fml.relauncher.SideOnly;
 import net.minecraftforge.items.IItemHandler;
 import nl.requios.effortlessbuilding.item.ItemRandomizerBag;
 
+@Mod.EventBusSubscriber
 public class Array {
     //TODO config file
     public static final int MAX_COUNT = 100;
@@ -22,7 +30,7 @@ public class Array {
         public BlockPos offset = BlockPos.ORIGIN;
         public int count = 5;
 
-        public ArraySettings(){
+        public ArraySettings() {
         }
 
         public ArraySettings(boolean enabled, BlockPos offset, int count) {
@@ -33,14 +41,14 @@ public class Array {
     }
 
     //Called from EventHandler
-    public static void onBlockPlaced(BlockEvent.PlaceEvent event) {
+    public static boolean onBlockPlaced(BlockEvent.PlaceEvent event) {
-        if (event.getWorld().isRemote) return;
+        if (event.getWorld().isRemote) return false;
 
         //find arraysettings for the player that placed the block
         ArraySettings a = BuildSettingsManager.getBuildSettings(event.getPlayer()).getArraySettings();
-        if (a == null || !a.enabled) return;
+        if (a == null || !a.enabled) return false;
 
-        if (a.offset.getX() == 0 && a.offset.getY() == 0 && a.offset.getZ() == 0) return;
+        if (a.offset.getX() == 0 && a.offset.getY() == 0 && a.offset.getZ() == 0) return false;
 
         BlockPos pos = event.getPos();
         Vec3i offset = new Vec3i(a.offset.getX(), a.offset.getY(), a.offset.getZ());
@@ -59,31 +67,28 @@ public class Array {
             if (event.getWorld().isBlockLoaded(pos, true)) {
                 if (itemStack.isEmpty()) break;
 
-                //Check if held block = placed block (otherwise its a bag or wand)
+                IBlockState blockState = event.getPlacedBlock();
-                if (!event.getPlayer().isCreative() && Block.getBlockFromItem(itemStack.getItem()) == event.getPlacedBlock().getBlock()) {
-                    itemStack.shrink(1);
-                }
 
                 //Randomizer bag synergy
-                IBlockState blockState = bagInventory == null ? event.getPlacedBlock() :
+                if (bagInventory != null) {
-                        getBlockStateFromRandomizerBag(bagInventory, event.getWorld(), event.getPlayer(), event.getPos());
+                    itemStack = ItemRandomizerBag.pickRandomStack(bagInventory);
+                    if (itemStack.isEmpty()) continue;
+                    blockState = getBlockStateFromRandomizerBag(bagInventory, event.getWorld(), event.getPlayer(), event.getPos(), itemStack);
+                    if (blockState == null) continue;
+                }
 
                 //TODO check if can place (ItemBlock) and if can break replaced
 
-                //Drop existing block
+                SurvivalHelper.placeBlock(event.getWorld(), event.getPlayer(), pos, blockState, itemStack, EnumFacing.NORTH, true, false);
-                SurvivalHelper.dropBlock(event.getWorld(), pos, event.getPlayer());
-
-                event.getWorld().setBlockState(pos, blockState);
             }
         }
-        //EffortlessBuilding.log(event.getPlayer(), String.valueOf(event.getPlayer().getHeldItem(event.getHand()).getCount()));
+
+        return true;
     }
 
-    private static IBlockState getBlockStateFromRandomizerBag(IItemHandler bagInventory, World world, EntityPlayer player, BlockPos pos) {
+    private static IBlockState getBlockStateFromRandomizerBag(IItemHandler bagInventory, World world, EntityPlayer player, BlockPos pos, ItemStack itemStack) {
-        int randomSlot = ItemRandomizerBag.pickRandomSlot(bagInventory);
-        ItemStack stack = bagInventory.getStackInSlot(randomSlot);
         //TODO get facing from getPlacedAgainst and getPlacedBlock
-        return Block.getBlockFromItem(stack.getItem()).getStateForPlacement(world, pos, EnumFacing.NORTH, 0, 0, 0, stack.getMetadata(), player, EnumHand.MAIN_HAND);
+        return Block.getBlockFromItem(itemStack.getItem()).getStateForPlacement(world, pos, EnumFacing.NORTH, 0, 0, 0, itemStack.getMetadata(), player, EnumHand.MAIN_HAND);
     }
 
     //Called from EventHandler
@@ -100,14 +105,46 @@ public class Array {
         Vec3i offset = new Vec3i(a.offset.getX(), a.offset.getY(), a.offset.getZ());
         for (int i = 0; i < a.count; i++) {
             pos = pos.add(offset);
-            if (event.getWorld().isBlockLoaded(pos, false)) {
+            SurvivalHelper.breakBlock(event.getWorld(), event.getPlayer(), pos);
-                //TODO check if can break
+        }
+    }
 
-                //Drop existing block
+    @SubscribeEvent
-                SurvivalHelper.dropBlock(event.getWorld(), pos, event.getPlayer());
+    @SideOnly(Side.CLIENT)
+    public static void onRender(RenderWorldLastEvent event) {
+        EntityPlayer player = Minecraft.getMinecraft().player;
+        BuildSettingsManager.BuildSettings buildSettings = BuildSettingsManager.getBuildSettings(player);
+        if (buildSettings == null) return;
+        ArraySettings a = buildSettings.getArraySettings();
 
-                event.getWorld().setBlockToAir(pos);
+        if (a == null || !a.enabled || (a.offset.getX() == 0 && a.offset.getY() == 0 && a.offset.getZ() == 0)) return;
-            }
+
+        RenderHelper.begin(event.getPartialTicks());
+
+        //Render block outlines
+        RayTraceResult objectMouseOver = Minecraft.getMinecraft().objectMouseOver;
+        if (objectMouseOver.typeOfHit == RayTraceResult.Type.BLOCK)
+        {
+            BlockPos blockPos = objectMouseOver.getBlockPos();
+            if (!buildSettings.doQuickReplace()) blockPos = blockPos.offset(objectMouseOver.sideHit);
+
+            drawBlockOutlines(a, blockPos);
+        }
+
+        RenderHelper.end();
+    }
+
+    @SideOnly(Side.CLIENT)
+    public static void drawBlockOutlines(ArraySettings a, BlockPos pos) {
+        if (a == null || !a.enabled || (a.offset.getX() == 0 && a.offset.getY() == 0 && a.offset.getZ() == 0)) return;
+
+        Vec3i offset = new Vec3i(a.offset.getX(), a.offset.getY(), a.offset.getZ());
+
+        //RenderHelper.renderBlockOutline(blockPos);
+        for (int i = 0; i < a.count; i++)
+        {
+            pos = pos.add(offset);
+            RenderHelper.renderBlockOutline(pos);
         }
     }
 }

src/main/java/nl/requios/effortlessbuilding/EffortlessBuilding.java

@@ -29,7 +29,7 @@ public class EffortlessBuilding
 {
     public static final String MODID = "effortlessbuilding";
     public static final String NAME = "Effortless Building";
-    public static final String VERSION = "0.1.3";
+    public static final String VERSION = "0.2";
 
     @Mod.Instance(EffortlessBuilding.MODID)
     public static EffortlessBuilding instance;

src/main/java/nl/requios/effortlessbuilding/EventHandler.java

@@ -1,23 +1,31 @@
 package nl.requios.effortlessbuilding;
 
 import net.minecraft.block.Block;
+import net.minecraft.block.state.IBlockState;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemBlock;
+import net.minecraft.item.ItemStack;
 import net.minecraft.item.crafting.IRecipe;
+import net.minecraft.util.EnumFacing;
 import net.minecraft.util.EnumHand;
 import net.minecraft.util.ResourceLocation;
 import net.minecraftforge.event.AttachCapabilitiesEvent;
 import net.minecraftforge.event.RegistryEvent;
+import net.minecraftforge.event.entity.player.PlayerInteractEvent;
 import net.minecraftforge.event.world.BlockEvent;
 import net.minecraftforge.fml.common.Mod;
 import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
+import net.minecraftforge.fml.common.gameevent.TickEvent;
 import nl.requios.effortlessbuilding.capability.BuildModifierCapability;
 
 @Mod.EventBusSubscriber
 public class EventHandler
 {
+    private static boolean placedBlock = false;
+    private static BlockEvent.PlaceEvent placeEvent = null;
+
     @SubscribeEvent
     public static void registerBlocks(RegistryEvent.Register<Block> event)
     {
@@ -42,15 +50,28 @@ public class EventHandler
         }
     }
 
+    @SubscribeEvent
+    public static void onServerTick(TickEvent.ServerTickEvent event) {
+        if (placedBlock) {
+            placedBlock = false;
+
+            Mirror.onBlockPlaced(placeEvent);
+            Array.onBlockPlaced(placeEvent);
+        }
+    }
 
     @SubscribeEvent
     public static void onBlockPlaced(BlockEvent.PlaceEvent event) {
-        QuickReplace.onBlockPlaced(event);
+        if (QuickReplace.onBlockPlaced(event)) {
-        if (event.isCanceled()) return;
+            event.setCanceled(true);
-        Mirror.onBlockPlaced(event);
+            return;
-        Array.onBlockPlaced(event);
+        }
-    }
 
+        //Delay mirror and array by a tick so we can edit the held itemstack
+        //Otherwise the itemstack count would be overridden by ItemBlock#onItemUse
+        placedBlock = true;
+        placeEvent = event;
+    }
 
     @SubscribeEvent
     public static void onBlockBroken(BlockEvent.BreakEvent event) {

src/main/java/nl/requios/effortlessbuilding/Mirror.java

@@ -3,6 +3,7 @@ package nl.requios.effortlessbuilding;
 import net.minecraft.block.*;
 import net.minecraft.block.state.IBlockState;
 import net.minecraft.client.Minecraft;
+import net.minecraft.client.entity.EntityPlayerSP;
 import net.minecraft.client.renderer.BufferBuilder;
 import net.minecraft.client.renderer.Tessellator;
 import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
@@ -11,6 +12,7 @@ import net.minecraft.item.ItemStack;
 import net.minecraft.util.EnumFacing;
 import net.minecraft.util.EnumHand;
 import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.RayTraceResult;
 import net.minecraft.util.math.Vec3d;
 import net.minecraft.world.World;
 import net.minecraftforge.client.event.RenderWorldLastEvent;
@@ -62,14 +64,14 @@ public class Mirror {
     }
 
     //Called from EventHandler
-    public static void onBlockPlaced(BlockEvent.PlaceEvent event) {
+    public static boolean onBlockPlaced(BlockEvent.PlaceEvent event) {
-        if (event.getWorld().isRemote) return;
+        if (event.getWorld().isRemote) return false;
 
         //find mirrorsettings for the player that placed the block
         MirrorSettings m = BuildSettingsManager.getBuildSettings(event.getPlayer()).getMirrorSettings();
-        if (m == null) return;
+        if (m == null) return false;
 
-        if (!m.enabled || (!m.mirrorX && !m.mirrorY && !m.mirrorZ)) return;
+        if (!m.enabled || (!m.mirrorX && !m.mirrorY && !m.mirrorZ)) return false;
 
         //if within mirror distance, mirror
         BlockPos oldBlockPos = event.getPos();
@@ -77,7 +79,9 @@ public class Mirror {
         if (oldBlockPos.getX() + 0.5 < m.position.x - m.radius || oldBlockPos.getX() + 0.5 > m.position.x + m.radius ||
                 oldBlockPos.getY() + 0.5 < m.position.y - m.radius || oldBlockPos.getY() + 0.5 > m.position.y + m.radius ||
                 oldBlockPos.getZ() + 0.5 < m.position.z - m.radius || oldBlockPos.getZ() + 0.5 > m.position.z + m.radius)
-            return;
+            return false;
+
+        ItemStack itemStack = event.getPlayer().getHeldItem(event.getHand());
 
         //Randomizer bag synergy
         IItemHandler bagInventory = null;
@@ -86,91 +90,93 @@ public class Mirror {
         }
 
         if (m.mirrorX) {
-            placeMirrorX(event.getWorld(), event.getPlayer(), m, event.getPos(), event.getPlacedBlock(), bagInventory);
+            placeMirrorX(event.getWorld(), event.getPlayer(), m, event.getPos(), event.getPlacedBlock(), bagInventory, itemStack);
         }
 
         if (m.mirrorY) {
-            placeMirrorY(event.getWorld(), event.getPlayer(), m, oldBlockPos, event.getPlacedBlock(), bagInventory);
+            placeMirrorY(event.getWorld(), event.getPlayer(), m, oldBlockPos, event.getPlacedBlock(), bagInventory, itemStack);
         }
 
         if (m.mirrorZ) {
-            placeMirrorZ(event.getWorld(), event.getPlayer(), m, oldBlockPos, event.getPlacedBlock(), bagInventory);
+            placeMirrorZ(event.getWorld(), event.getPlayer(), m, oldBlockPos, event.getPlacedBlock(), bagInventory, itemStack);
         }
+
+        return true;
     }
 
-    private static IBlockState getBlockStateFromRandomizerBag(IItemHandler bagInventory, World world, EntityPlayer player, BlockPos pos) {
+    private static void placeMirrorX(World world, EntityPlayer player, MirrorSettings m, BlockPos oldBlockPos, IBlockState oldBlockState, IItemHandler bagInventory, ItemStack itemStack) {
-        int randomSlot = ItemRandomizerBag.pickRandomSlot(bagInventory);
-        ItemStack stack = bagInventory.getStackInSlot(randomSlot);
-        //TODO get facing from getPlacedAgainst and getPlacedBlock
-        return Block.getBlockFromItem(stack.getItem()).getStateForPlacement(world, pos, EnumFacing.NORTH, 0, 0, 0, stack.getMetadata(), player, EnumHand.MAIN_HAND);
-    }
-
-    private static void placeMirrorX(World world, EntityPlayer player, MirrorSettings m, BlockPos oldBlockPos, IBlockState oldBlockState, IItemHandler bagInventory) {
         //find mirror position
         double x = m.position.x + (m.position.x - oldBlockPos.getX() - 0.5);
         BlockPos newBlockPos = new BlockPos(x, oldBlockPos.getY(), oldBlockPos.getZ());
 
         //Randomizer bag synergy
-        if (bagInventory != null)
+        if (bagInventory != null) {
-            oldBlockState = getBlockStateFromRandomizerBag(bagInventory, world, player, oldBlockPos);
+            itemStack = ItemRandomizerBag.pickRandomStack(bagInventory);
+            if (itemStack.isEmpty()) return;
+            oldBlockState = getBlockStateFromRandomizerBag(bagInventory, world, player, oldBlockPos, itemStack);
+            if (oldBlockState == null) return;
+        }
 
         IBlockState newBlockState = oldBlockState.withMirror(net.minecraft.util.Mirror.FRONT_BACK);
         //place block
         if (world.isBlockLoaded(newBlockPos, true)) {
-            placeBlock(world, player, newBlockPos, newBlockState);
+            placeBlock(world, player, newBlockPos, newBlockState, itemStack);
         }
-        if (m.mirrorY) placeMirrorY(world, player, m, newBlockPos, newBlockState, bagInventory);
+        if (m.mirrorY) placeMirrorY(world, player, m, newBlockPos, newBlockState, bagInventory, itemStack);
-        if (m.mirrorZ) placeMirrorZ(world, player, m, newBlockPos, newBlockState, bagInventory);
+        if (m.mirrorZ) placeMirrorZ(world, player, m, newBlockPos, newBlockState, bagInventory, itemStack);
     }
 
-    private static void placeMirrorY(World world, EntityPlayer player, MirrorSettings m, BlockPos oldBlockPos, IBlockState oldBlockState, IItemHandler bagInventory) {
+    private static void placeMirrorY(World world, EntityPlayer player, MirrorSettings m, BlockPos oldBlockPos, IBlockState oldBlockState, IItemHandler bagInventory, ItemStack itemStack) {
         //find mirror position
         double y = m.position.y + (m.position.y - oldBlockPos.getY() - 0.5);
         BlockPos newBlockPos = new BlockPos(oldBlockPos.getX(), y, oldBlockPos.getZ());
 
         //Randomizer bag synergy
-        if (bagInventory != null)
+        if (bagInventory != null) {
-            oldBlockState = getBlockStateFromRandomizerBag(bagInventory, world, player, oldBlockPos);
+            itemStack = ItemRandomizerBag.pickRandomStack(bagInventory);
+            if (itemStack.isEmpty()) return;
+            oldBlockState = getBlockStateFromRandomizerBag(bagInventory, world, player, oldBlockPos, itemStack);
+            if (oldBlockState == null) return;
+        }
 
         IBlockState newBlockState = getVerticalMirror(oldBlockState);
         //place block
         if (world.isBlockLoaded(newBlockPos, true)) {
-            placeBlock(world, player, newBlockPos, newBlockState);
+            placeBlock(world, player, newBlockPos, newBlockState, itemStack);
         }
-        if (m.mirrorZ) placeMirrorZ(world, player, m, newBlockPos, newBlockState, bagInventory);
+        if (m.mirrorZ) placeMirrorZ(world, player, m, newBlockPos, newBlockState, bagInventory, itemStack);
     }
 
-    private static void placeMirrorZ(World world, EntityPlayer player, MirrorSettings m, BlockPos oldBlockPos, IBlockState oldBlockState, IItemHandler bagInventory) {
+    private static void placeMirrorZ(World world, EntityPlayer player, MirrorSettings m, BlockPos oldBlockPos, IBlockState oldBlockState, IItemHandler bagInventory, ItemStack itemStack) {
         //find mirror position
         double z = m.position.z + (m.position.z - oldBlockPos.getZ() - 0.5);
         BlockPos newBlockPos = new BlockPos(oldBlockPos.getX(), oldBlockPos.getY(), z);
 
         //Randomizer bag synergy
-        if (bagInventory != null)
+        if (bagInventory != null) {
-            oldBlockState = getBlockStateFromRandomizerBag(bagInventory, world, player, oldBlockPos);
+            itemStack = ItemRandomizerBag.pickRandomStack(bagInventory);
+            if (itemStack.isEmpty()) return;
+            oldBlockState = getBlockStateFromRandomizerBag(bagInventory, world, player, oldBlockPos, itemStack);
+            if (oldBlockState == null) return;
+        }
 
         IBlockState newBlockState = oldBlockState.withMirror(net.minecraft.util.Mirror.LEFT_RIGHT);
         //place block
         if (world.isBlockLoaded(newBlockPos, true)) {
-            placeBlock(world, player, newBlockPos, newBlockState);
+            placeBlock(world, player, newBlockPos, newBlockState, itemStack);
         }
     }
 
-    private static void placeBlock(World world, EntityPlayer player, BlockPos newBlockPos, IBlockState newBlockState) {
+    private static IBlockState getBlockStateFromRandomizerBag(IItemHandler bagInventory, World world, EntityPlayer player, BlockPos pos, ItemStack itemStack) {
-        //Check itemstack
+        //TODO get facing from getPlacedAgainst and getPlacedBlock
-        ItemStack itemStack = player.getHeldItem(player.swingingHand); //TODO check hand
+        return Block.getBlockFromItem(itemStack.getItem()).getStateForPlacement(world, pos, EnumFacing.NORTH, 0, 0, 0, itemStack.getMetadata(), player, EnumHand.MAIN_HAND);
-        if (itemStack.isEmpty()) return;
+    }
 
+    private static void placeBlock(World world, EntityPlayer player, BlockPos newBlockPos, IBlockState newBlockState, ItemStack itemStack) {
         //TODO check if can place
         //TODO check if can break
 
-        SurvivalHelper.dropBlock(world, newBlockPos, player);
+        SurvivalHelper.placeBlock(world, player, newBlockPos, newBlockState, itemStack, EnumFacing.NORTH, true, false);
-        world.setBlockState(newBlockPos, newBlockState);
-
-        //Check if held block = placed block (otherwise its a bag or wand)
-        if (!player.isCreative() && Block.getBlockFromItem(itemStack.getItem()) == newBlockState.getBlock()) {
-            itemStack.shrink(1);
-        }
 
         //Array synergy
         BlockSnapshot blockSnapshot = new BlockSnapshot(world, newBlockPos, newBlockState);
@@ -255,9 +261,7 @@ public class Mirror {
         double x = m.position.x + (m.position.x - oldBlockPos.getX() - 0.5);
         BlockPos newBlockPos = new BlockPos(x, oldBlockPos.getY(), oldBlockPos.getZ());
         //break block
-        if (event.getWorld().isBlockLoaded(newBlockPos, true)) {
+        breakBlock(event, newBlockPos);
-            breakBlock(event, newBlockPos);
-        }
         if (m.mirrorY) breakMirrorY(event, m, newBlockPos);
         if (m.mirrorZ) breakMirrorZ(event, m, newBlockPos);
     }
@@ -266,10 +270,8 @@ public class Mirror {
         //find mirror position
         double y = m.position.y + (m.position.y - oldBlockPos.getY() - 0.5);
         BlockPos newBlockPos = new BlockPos(oldBlockPos.getX(), y, oldBlockPos.getZ());
-        //place block
+        //break block
-        if (event.getWorld().isBlockLoaded(newBlockPos, true)) {
+        breakBlock(event, newBlockPos);
-            breakBlock(event, newBlockPos);
-        }
         if (m.mirrorZ) breakMirrorZ(event, m, newBlockPos);
     }
 
@@ -277,17 +279,14 @@ public class Mirror {
         //find mirror position
         double z = m.position.z + (m.position.z - oldBlockPos.getZ() - 0.5);
         BlockPos newBlockPos = new BlockPos(oldBlockPos.getX(), oldBlockPos.getY(), z);
-        //place block
+        //break block
-        if (event.getWorld().isBlockLoaded(newBlockPos, true)) {
+        breakBlock(event, newBlockPos);
-            breakBlock(event, newBlockPos);
-        }
     }
 
     private static void breakBlock(BlockEvent.BreakEvent event, BlockPos newBlockPos) {
-        //TODO check if can break
+        if (!event.getWorld().isBlockLoaded(newBlockPos, false)) return;
 
-        SurvivalHelper.dropBlock(event.getWorld(), newBlockPos, event.getPlayer());
+        SurvivalHelper.breakBlock(event.getWorld(), event.getPlayer(), newBlockPos);
-        event.getWorld().setBlockToAir(newBlockPos);
 
         //Array synergy
         BlockEvent.BreakEvent breakEvent = new BlockEvent.BreakEvent(event.getWorld(), newBlockPos, event.getState(), event.getPlayer());
@@ -304,7 +303,8 @@ public class Mirror {
 
         if (m == null || !m.enabled || (!m.mirrorX && !m.mirrorY && !m.mirrorZ)) return;
 
-        Vec3d playerPos = new Vec3d(player.posX, player.posY, player.posZ);
+        RenderHelper.begin(event.getPartialTicks());
+
         Vec3d pos = m.position.add(epsilon);
         int radius = m.radius;
 
@@ -312,44 +312,47 @@ public class Mirror {
             Vec3d posA = new Vec3d(pos.x, pos.y - radius, pos.z - radius);
             Vec3d posB = new Vec3d(pos.x, pos.y + radius, pos.z + radius);
 
-            drawMirrorPlane(playerPos, posA, posB, colorX, m.drawLines, m.drawPlanes);
+            drawMirrorPlane(posA, posB, colorX, m.drawLines, m.drawPlanes);
         }
         if (m.mirrorY) {
             Vec3d posA = new Vec3d(pos.x - radius, pos.y, pos.z - radius);
             Vec3d posB = new Vec3d(pos.x + radius, pos.y, pos.z + radius);
 
-            drawMirrorPlaneY(playerPos, posA, posB, colorY, m.drawLines, m.drawPlanes);
+            drawMirrorPlaneY(posA, posB, colorY, m.drawLines, m.drawPlanes);
         }
         if (m.mirrorZ) {
             Vec3d posA = new Vec3d(pos.x - radius, pos.y - radius, pos.z);
             Vec3d posB = new Vec3d(pos.x + radius, pos.y + radius, pos.z);
 
-            drawMirrorPlane(playerPos, posA, posB, colorZ, m.drawLines, m.drawPlanes);
+            drawMirrorPlane(posA, posB, colorZ, m.drawLines, m.drawPlanes);
         }
 
         //Draw axis coordinated colors if two or more axes are enabled
         //(If only one is enabled the lines are that planes color)
         if (m.drawLines && ((m.mirrorX && m.mirrorY) || (m.mirrorX && m.mirrorZ) || (m.mirrorY && m.mirrorZ))) {
-            drawMirrorLines(playerPos, m);
+            drawMirrorLines(m);
         }
+
+        //Render block outlines
+        RayTraceResult objectMouseOver = Minecraft.getMinecraft().objectMouseOver;
+        if (objectMouseOver.typeOfHit == RayTraceResult.Type.BLOCK)
+        {
+            BlockPos blockPos = objectMouseOver.getBlockPos();
+            if (!buildSettings.doQuickReplace()) blockPos = blockPos.offset(objectMouseOver.sideHit);
+
+            //RenderHelper.renderBlockOutline(blockPos);
+            if (m.mirrorX) drawBlockOutlineX(buildSettings, blockPos);
+            if (m.mirrorY) drawBlockOutlineY(buildSettings, blockPos);
+            if (m.mirrorZ) drawBlockOutlineZ(buildSettings, blockPos);
+        }
+
+        RenderHelper.end();
     }
 
     @SideOnly(Side.CLIENT)
-    public static void drawMirrorPlane(Vec3d playerPos, Vec3d posA, Vec3d posB, Color c, boolean drawLines, boolean drawPlanes) {
+    public static void drawMirrorPlane(Vec3d posA, Vec3d posB, Color c, boolean drawLines, boolean drawPlanes) {
-
-        GL11.glPushAttrib(GL11.GL_ENABLE_BIT);
-        GL11.glPushMatrix();
-        GL11.glDisable(GL11.GL_CULL_FACE);
-        GL11.glDisable(GL11.GL_LIGHTING);
-        GL11.glDisable(GL11.GL_TEXTURE_2D);
-
-        GL11.glEnable(GL11.GL_BLEND);
-        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
-        GL11.glTranslated(-playerPos.x, -playerPos.y, -playerPos.z);
 
         GL11.glColor4d(c.getRed(), c.getGreen(), c.getBlue(), planeAlpha);
-        GL11.glLineWidth(2);
-        GL11.glDepthMask(false);
         Tessellator tessellator = Tessellator.getInstance();
         BufferBuilder bufferBuilder = tessellator.getBuffer();
 
@@ -375,28 +378,12 @@ public class Mirror {
 
             tessellator.draw();
         }
-
-        GL11.glDepthMask(true);
-        GL11.glPopMatrix();
-        GL11.glPopAttrib();
     }
 
     @SideOnly(Side.CLIENT)
-    public static void drawMirrorPlaneY(Vec3d playerPos, Vec3d posA, Vec3d posB, Color c, boolean drawLines, boolean drawPlanes) {
+    public static void drawMirrorPlaneY(Vec3d posA, Vec3d posB, Color c, boolean drawLines, boolean drawPlanes) {
-
-        GL11.glPushAttrib(GL11.GL_ENABLE_BIT);
-        GL11.glPushMatrix();
-        GL11.glDisable(GL11.GL_CULL_FACE);
-        GL11.glDisable(GL11.GL_LIGHTING);
-        GL11.glDisable(GL11.GL_TEXTURE_2D);
-
-        GL11.glEnable(GL11.GL_BLEND);
-        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
-        GL11.glTranslated(-playerPos.x, -playerPos.y, -playerPos.z);
 
         GL11.glColor4d(c.getRed(), c.getGreen(), c.getBlue(), c.getAlpha());
-        GL11.glLineWidth(2);
-        GL11.glDepthMask(false);
         Tessellator tessellator = Tessellator.getInstance();
         BufferBuilder bufferBuilder = tessellator.getBuffer();
 
@@ -422,30 +409,15 @@ public class Mirror {
 
             tessellator.draw();
         }
-
-        GL11.glDepthMask(true);
-        GL11.glPopMatrix();
-        GL11.glPopAttrib();
     }
 
     @SideOnly(Side.CLIENT)
-    public static void drawMirrorLines(Vec3d playerPos, MirrorSettings m) {
+    public static void drawMirrorLines(MirrorSettings m) {
 
         Vec3d pos = m.position.add(epsilon);
 
-        GL11.glPushAttrib(GL11.GL_ENABLE_BIT);
-        GL11.glPushMatrix();
-        GL11.glDisable(GL11.GL_CULL_FACE);
-        GL11.glDisable(GL11.GL_LIGHTING);
-        GL11.glDisable(GL11.GL_TEXTURE_2D);
-
-        GL11.glEnable(GL11.GL_BLEND);
-        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
-        GL11.glTranslated(-playerPos.x, -playerPos.y, -playerPos.z);
-
         GL11.glColor4d(100, 100, 100, 255);
         GL11.glLineWidth(2);
-        GL11.glDepthMask(false);
         Tessellator tessellator = Tessellator.getInstance();
         BufferBuilder bufferBuilder = tessellator.getBuffer();
 
@@ -459,11 +431,50 @@ public class Mirror {
         bufferBuilder.pos(pos.x, pos.y, pos.z + m.radius).color(colorX.getRed(), colorX.getGreen(), colorX.getBlue(), lineAlpha).endVertex();
 
         tessellator.draw();
-
-        GL11.glDepthMask(true);
-        GL11.glPopMatrix();
-        GL11.glPopAttrib();
     }
 
+    @SideOnly(Side.CLIENT)
+    public static void drawBlockOutlineX(BuildSettingsManager.BuildSettings buildSettings, BlockPos oldBlockPos) {
+        MirrorSettings m = buildSettings.getMirrorSettings();
+        //find mirror position
+        double x = m.position.x + (m.position.x - oldBlockPos.getX() - 0.5);
+        BlockPos newBlockPos = new BlockPos(x, oldBlockPos.getY(), oldBlockPos.getZ());
+
+        RenderHelper.renderBlockOutline(newBlockPos);
+
+        //Array synergy
+        Array.drawBlockOutlines(buildSettings.getArraySettings(), newBlockPos);
+
+        if (m.mirrorY) drawBlockOutlineY(buildSettings, newBlockPos);
+        if (m.mirrorZ) drawBlockOutlineZ(buildSettings, newBlockPos);
+    }
+
+    @SideOnly(Side.CLIENT)
+    public static void drawBlockOutlineY(BuildSettingsManager.BuildSettings buildSettings, BlockPos oldBlockPos) {
+        MirrorSettings m = buildSettings.getMirrorSettings();
+        //find mirror position
+        double y = m.position.y + (m.position.y - oldBlockPos.getY() - 0.5);
+        BlockPos newBlockPos = new BlockPos(oldBlockPos.getX(), y, oldBlockPos.getZ());
+
+        RenderHelper.renderBlockOutline(newBlockPos);
+
+        //Array synergy
+        Array.drawBlockOutlines(buildSettings.getArraySettings(), newBlockPos);
+
+        if (m.mirrorZ) drawBlockOutlineZ(buildSettings, newBlockPos);
+    }
+
+    @SideOnly(Side.CLIENT)
+    public static void drawBlockOutlineZ(BuildSettingsManager.BuildSettings buildSettings, BlockPos oldBlockPos) {
+        MirrorSettings m = buildSettings.getMirrorSettings();
+        //find mirror position
+        double z = m.position.z + (m.position.z - oldBlockPos.getZ() - 0.5);
+        BlockPos newBlockPos = new BlockPos(oldBlockPos.getX(), oldBlockPos.getY(), z);
+
+        RenderHelper.renderBlockOutline(newBlockPos);
+
+        //Array synergy
+        Array.drawBlockOutlines(buildSettings.getArraySettings(), newBlockPos);
+    }
 
 }

src/main/java/nl/requios/effortlessbuilding/QuickReplace.java

@@ -1,6 +1,5 @@
 package nl.requios.effortlessbuilding;
 
-import net.minecraft.block.Block;
 import net.minecraft.block.state.IBlockState;
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.entity.player.EntityPlayerMP;
@@ -19,26 +18,28 @@ public class QuickReplace {
     //Dilemma in getting blockstate from event to when message is received:
     // 1) send via client. Then hacking makes it possible to place any block.
     // 2) save serverside. Messages may not be received chronologically so data could get switched.
-    //Solution for now: save blockstate per player. Messages from 1 player will rarely come unchronologically
+    //Solution for now: save data serverside and per player. Messages from 1 player will rarely come unchronologically
     //and players will rarely switch between blocks that quickly.
 
     private static Dictionary<UUID, IBlockState> blockStates = new Hashtable<>();
+    private static Dictionary<UUID, ItemStack> itemStacks = new Hashtable<>();
 
-    public static void onBlockPlaced(BlockEvent.PlaceEvent event) {
+    public static boolean onBlockPlaced(BlockEvent.PlaceEvent event) {
-        if (event.getWorld().isRemote) return;
+        if (event.getWorld().isRemote) return true;
         //Only serverside
 
         BuildSettingsManager.BuildSettings buildSettings = BuildSettingsManager.getBuildSettings(event.getPlayer());
-        if (!buildSettings.doQuickReplace()) return;
+        if (!buildSettings.doQuickReplace()) return false;
 
         //TODO base on player facing instead, no more messages (or break block clientside)
 
         blockStates.put(event.getPlayer().getUniqueID(), event.getPlacedBlock());
+        itemStacks.put(event.getPlayer().getUniqueID(), event.getPlayer().getHeldItem(event.getHand()));
 
         //RayTraceResult result = event.getWorld().rayTraceBlocks(event.getPlayer().getPositionEyes(1f), event.getPlayer().getLookVec());
         EffortlessBuilding.packetHandler.sendTo(new QuickReplaceMessage(), (EntityPlayerMP) event.getPlayer());
 
-        event.setCanceled(true);
+        return true;
     }
 
     public static void onMessageReceived(EntityPlayer player, QuickReplaceMessage message) {
@@ -57,15 +58,9 @@ public class QuickReplace {
         }
 
         IBlockState blockState = blockStates.get(player.getUniqueID());
+        ItemStack itemStack = itemStacks.get(player.getUniqueID());
 
-        SurvivalHelper.dropBlock(player.world, placedAgainstBlockPos, player);
+        SurvivalHelper.placeBlock(player.world, player, placedAgainstBlockPos, blockState, itemStack, message.getSideHit(), true, false);
-        player.world.setBlockState(placedAgainstBlockPos, blockState);
-
-        //Shrink itemstack with 1
-        ItemStack itemStack = player.getHeldItem(player.swingingHand); //TODO check hand
-        if (!player.isCreative() && Block.getBlockFromItem(itemStack.getItem()) == blockState.getBlock()) {
-            itemStack.shrink(1);
-        }
 
         //Mirror and Array synergy
         BlockSnapshot blockSnapshot = new BlockSnapshot(player.world, placedAgainstBlockPos, blockState);

src/main/java/nl/requios/effortlessbuilding/RenderHelper.java

@@ -0,0 +1,60 @@
+package nl.requios.effortlessbuilding;
+
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.renderer.BufferBuilder;
+import net.minecraft.client.renderer.RenderGlobal;
+import net.minecraft.client.renderer.Tessellator;
+import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.util.math.AxisAlignedBB;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Vec3d;
+import net.minecraftforge.fml.relauncher.Side;
+import net.minecraftforge.fml.relauncher.SideOnly;
+import org.lwjgl.opengl.GL11;
+import org.lwjgl.util.Color;
+
+@SideOnly(Side.CLIENT)
+public class RenderHelper {
+    public static void begin(float partialTicks) {
+        EntityPlayer player = Minecraft.getMinecraft().player;
+        double playerX = player.prevPosX + (player.posX - player.prevPosX) * partialTicks;
+        double playerY = player.prevPosY + (player.posY - player.prevPosY) * partialTicks;
+        double playerZ = player.prevPosZ + (player.posZ - player.prevPosZ) * partialTicks;
+        Vec3d playerPos = new Vec3d(playerX, playerY, playerZ);
+
+        GL11.glPushAttrib(GL11.GL_ENABLE_BIT);
+        GL11.glPushMatrix();
+        GL11.glDisable(GL11.GL_CULL_FACE);
+        GL11.glDisable(GL11.GL_LIGHTING);
+        GL11.glDisable(GL11.GL_TEXTURE_2D);
+
+        GL11.glEnable(GL11.GL_BLEND);
+        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
+
+        GL11.glTranslated(-playerPos.x, -playerPos.y, -playerPos.z);
+
+        GL11.glLineWidth(2);
+        GL11.glDepthMask(false);
+    }
+
+    public static void end() {
+        GL11.glDepthMask(true);
+        GL11.glPopMatrix();
+        GL11.glPopAttrib();
+    }
+
+    public static void renderBlockOutline(BlockPos pos) {
+        renderBlockOutline(pos, pos);
+    }
+
+    //Renders outline. Pos1 has to be minimal x,y,z and pos2 maximal x,y,z
+    public static void renderBlockOutline(BlockPos pos1, BlockPos pos2) {
+        GL11.glLineWidth(2);
+
+        AxisAlignedBB aabb = new AxisAlignedBB(pos1, pos2.add(1, 1, 1)).grow(0.0020000000949949026);
+
+        RenderGlobal.drawSelectionBoundingBox(aabb, 1f, 1f, 1f, 0.6f);
+    }
+
+}

src/main/java/nl/requios/effortlessbuilding/SurvivalHelper.java

@@ -1,27 +1,129 @@
 package nl.requios.effortlessbuilding;
 
 import net.minecraft.block.Block;
+import net.minecraft.block.SoundType;
+import net.minecraft.block.material.Material;
 import net.minecraft.block.state.IBlockState;
+import net.minecraft.entity.Entity;
 import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.init.Blocks;
+import net.minecraft.item.Item;
+import net.minecraft.item.ItemBlock;
 import net.minecraft.item.ItemStack;
+import net.minecraft.util.EnumFacing;
+import net.minecraft.util.SoundCategory;
+import net.minecraft.util.math.AxisAlignedBB;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
+import net.minecraftforge.items.IItemHandler;
 import net.minecraftforge.items.ItemHandlerHelper;
+import nl.requios.effortlessbuilding.item.ItemRandomizerBag;
 
+import javax.annotation.Nullable;
 import java.util.List;
 
 public class SurvivalHelper {
 
-    public static boolean canBreak(){
+    //Used for all placing of blocks in this mod.
-        return true;
+    //Checks if area is loaded, if player has the right permissions, if existing block can be replaced (drops it if so) and consumes an item from the stack.
+    //Based on ItemBlock#onItemUse
+    public static boolean placeBlock(World world, EntityPlayer player, BlockPos pos, IBlockState blockState, ItemStack itemstack, EnumFacing facing, boolean skipCollisionCheck, boolean playSound) {
+        if (!world.isBlockLoaded(pos, true)) return false;
+
+        //Randomizer bag synergy
+        //Find itemstack that belongs to the blockstate
+        if (itemstack.getItem() == EffortlessBuilding.ITEM_RANDOMIZER_BAG) {
+            IItemHandler bagInventory = ItemRandomizerBag.getBagInventory(itemstack);
+            itemstack = ItemRandomizerBag.findStack(bagInventory, Item.getItemFromBlock(blockState.getBlock()));
+        }
+
+        //Check if itemstack is correct
+        if (!(itemstack.getItem() instanceof ItemBlock) || Block.getBlockFromItem(itemstack.getItem()) != blockState.getBlock()) {
+            EffortlessBuilding.log(player, "Cannot replace block", true);
+            EffortlessBuilding.log("SurvivalHelper#placeBlock: itemstack " + itemstack.toString() + " does not match blockstate " + blockState.toString());
+            return false;
+        }
+
+        Block block = ((ItemBlock) itemstack.getItem()).getBlock();
+
+        if (!itemstack.isEmpty() && canPlayerEdit(player, world, pos, itemstack) &&
+            mayPlace(world, block, blockState, pos, skipCollisionCheck, facing.getOpposite(), player) &&
+            canReplace(world, player, pos))
+        {
+            //Drop existing block
+            //TODO check if can replace
+            dropBlock(world, player, pos);
+
+            //From ItemBlock#placeBlockAt
+            if (!world.setBlockState(pos, blockState, 11)) return false;
+
+            IBlockState state = world.getBlockState(pos);
+            if (state.getBlock() == block)
+            {
+                ((ItemBlock) itemstack.getItem()).setTileEntityNBT(world, player, pos, itemstack);
+                block.onBlockPlacedBy(world, pos, state, player, itemstack);
+
+//                if (player instanceof EntityPlayerMP)
+//                    CriteriaTriggers.PLACED_BLOCK.trigger((EntityPlayerMP)player, pos, itemstack);
+            }
+
+            if (playSound) {
+                SoundType soundtype = state.getBlock().getSoundType(state, world, pos, player);
+                world.playSound(null, pos, soundtype.getPlaceSound(), SoundCategory.BLOCKS, (soundtype.getVolume() + 1.0F) / 2.0F, soundtype.getPitch() * 0.8F);
+            }
+
+            if (!player.isCreative() && Block.getBlockFromItem(itemstack.getItem()) == block) {
+                itemstack.shrink(1);
+            }
+
+            return true;
+        }
+        return false;
     }
 
-    public static boolean canPlace(){
+    //Used for all breaking of blocks in this mod.
-        return true;
+    //Checks if area is loaded, if appropriate tool is used in survival mode, and drops the block directly into the players inventory
+    public static boolean breakBlock(World world, EntityPlayer player, BlockPos pos) {
+        if (!world.isBlockLoaded(pos, false)) return false;
+
+        //Check if can break
+        if (canBreak(world, player, pos))
+        {
+            //Drop existing block
+            dropBlock(world, player, pos);
+
+            //Damage tool
+            player.getHeldItemMainhand().onBlockDestroyed(world, world.getBlockState(pos), pos, player);
+
+            world.setBlockToAir(pos);
+            return true;
+        }
+        return false;
+    }
+
+    //Can break using held tool? (or in creative)
+    public static boolean canBreak(World world, EntityPlayer player, BlockPos pos) {
+        if (player.isCreative()) return true;
+
+        IBlockState blockState = world.getBlockState(pos);
+        if (blockState.getBlock().canHarvestBlock(world, pos, player)) return true;
+
+        return false;
+    }
+
+    //Can be harvested with hand? (or in creative)
+    public static boolean canReplace(World world, EntityPlayer player, BlockPos pos){
+        if (player.isCreative()) return true;
+
+        IBlockState state = world.getBlockState(pos);
+        state = state.getBlock().getActualState(state, world, pos);
+        if (state.getMaterial().isToolNotRequired()) return true;
+
+        return false;
     }
 
     //Gives items directly to player
-    public static void dropBlock(World world, BlockPos pos, EntityPlayer player){
+    public static void dropBlock(World world, EntityPlayer player, BlockPos pos){
         if (player.isCreative()) return;
 
         IBlockState blockState = world.getBlockState(pos);
@@ -32,4 +134,46 @@ public class SurvivalHelper {
             ItemHandlerHelper.giveItemToPlayer(player, drop);
         }
     }
+
+    //From EntityPlayer#canPlayerEdit
+    private static boolean canPlayerEdit(EntityPlayer player, World world, BlockPos pos, ItemStack stack)
+    {
+        if (player.capabilities.allowEdit)
+        {
+            return true;
+        }
+        else
+        {
+            Block block = world.getBlockState(pos).getBlock();
+            return stack.canPlaceOn(block) || stack.canEditBlocks();
+        }
+    }
+
+    //From World#mayPlace
+    private static boolean mayPlace(World world, Block blockIn, IBlockState newBlockState, BlockPos pos, boolean skipCollisionCheck, EnumFacing sidePlacedOn, @Nullable Entity placer)
+    {
+        IBlockState iblockstate1 = world.getBlockState(pos);
+        AxisAlignedBB axisalignedbb = skipCollisionCheck ? null : blockIn.getDefaultState().getCollisionBoundingBox(world, pos);
+
+        if (axisalignedbb != Block.NULL_AABB && !world.checkNoEntityCollision(axisalignedbb.offset(pos), placer))
+        {
+            return false;
+        }
+
+        //Check if same block
+        //Necessary otherwise extra items will be dropped
+        if (iblockstate1 == newBlockState) {
+            return false;
+        }
+
+        if (iblockstate1.getMaterial() == Material.CIRCUITS && blockIn == Blocks.ANVIL)
+        {
+            return true;
+        }
+
+        //TODO check config for allow to replace
+        return true;
+        //TODO fix check canPlaceBlockOnSide
+        //return /*iblockstate1.getBlock().isReplaceable(world, pos) &&*/ blockIn.canPlaceBlockOnSide(world, pos, sidePlacedOn);
+    }
 }

src/main/java/nl/requios/effortlessbuilding/item/ItemRandomizerBag.java

@@ -6,6 +6,7 @@ import net.minecraft.client.util.ITooltipFlag;
 import net.minecraft.creativetab.CreativeTabs;
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.item.Item;
+import net.minecraft.item.ItemBlock;
 import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.util.ActionResult;
@@ -20,9 +21,11 @@ import net.minecraftforge.common.util.BlockSnapshot;
 import net.minecraftforge.event.world.BlockEvent;
 import net.minecraftforge.items.CapabilityItemHandler;
 import net.minecraftforge.items.IItemHandler;
+import net.minecraftforge.items.ItemStackHandler;
 import nl.requios.effortlessbuilding.Array;
 import nl.requios.effortlessbuilding.EffortlessBuilding;
 import nl.requios.effortlessbuilding.Mirror;
+import nl.requios.effortlessbuilding.SurvivalHelper;
 import nl.requios.effortlessbuilding.capability.ItemHandlerCapabilityProvider;
 
 import javax.annotation.Nullable;
@@ -40,7 +43,7 @@ public class ItemRandomizerBag extends Item {
         this.setUnlocalizedName(this.getRegistryName().toString());
 
         this.maxStackSize = 1;
-        this.setCreativeTab(CreativeTabs.DECORATIONS);
+        this.setCreativeTab(CreativeTabs.TOOLS);
     }
 
     @Override
@@ -59,11 +62,7 @@ public class ItemRandomizerBag extends Item {
             if (bagInventory == null)
                 return EnumActionResult.FAIL;
 
-            int randomSlot = pickRandomSlot(bagInventory);
+            ItemStack toPlace = pickRandomStack(bagInventory);
-            if (randomSlot < 0 || randomSlot > bagInventory.getSlots()) return EnumActionResult.FAIL;
-
-            ItemStack toPlace = bagInventory.getStackInSlot(randomSlot);
-
             if (toPlace.isEmpty()) return EnumActionResult.FAIL;
 
             //Previously: use onItemUse to place block (no synergy)
@@ -76,13 +75,15 @@ public class ItemRandomizerBag extends Item {
 
             IBlockState blockState = Block.getBlockFromItem(toPlace.getItem()).getStateForPlacement(world, pos, facing,
                     hitX, hitY, hitZ, toPlace.getMetadata(), player, hand);
-            world.setBlockState(pos, blockState);
+
+            SurvivalHelper.placeBlock(world, player, pos, blockState, toPlace, facing, false, true);
 
             //Synergy
-            BlockSnapshot blockSnapshot = new BlockSnapshot(player.world, pos, blockState);
+            //Works without calling
-            BlockEvent.PlaceEvent placeEvent = new BlockEvent.PlaceEvent(blockSnapshot, blockState, player, hand);
+//            BlockSnapshot blockSnapshot = new BlockSnapshot(player.world, pos, blockState);
-            Mirror.onBlockPlaced(placeEvent);
+//            BlockEvent.PlaceEvent placeEvent = new BlockEvent.PlaceEvent(blockSnapshot, blockState, player, hand);
-            Array.onBlockPlaced(placeEvent);
+//            Mirror.onBlockPlaced(placeEvent);
+//            Array.onBlockPlaced(placeEvent);
         }
         return EnumActionResult.SUCCESS;
     }
@@ -102,11 +103,7 @@ public class ItemRandomizerBag extends Item {
             if (bagInventory == null)
                 return new ActionResult<>(EnumActionResult.FAIL, player.getHeldItem(hand));
 
-            int randomSlot = pickRandomSlot(bagInventory);
+            ItemStack toUse = pickRandomStack(bagInventory);
-            if (randomSlot < 0 || randomSlot > bagInventory.getSlots())
-                return new ActionResult<>(EnumActionResult.FAIL, player.getHeldItem(hand));
-
-            ItemStack toUse = bagInventory.getStackInSlot(randomSlot);
             if (toUse.isEmpty()) return new ActionResult<>(EnumActionResult.FAIL, player.getHeldItem(hand));
 
             return toUse.useItemRightClick(world, player, hand);
@@ -131,7 +128,7 @@ public class ItemRandomizerBag extends Item {
      * @param bagInventory
      * @return
      */
-    public static int pickRandomSlot(IItemHandler bagInventory) {
+    public static ItemStack pickRandomStack(IItemHandler bagInventory) {
         //Find how many stacks are non-empty, and save them in a list
         int nonempty = 0;
         List<ItemStack> nonEmptyStacks = new ArrayList<>(INV_SIZE);
@@ -148,12 +145,26 @@ public class ItemRandomizerBag extends Item {
         if (nonEmptyStacks.size() != originalSlots.size())
             throw new Error("NonEmptyStacks and OriginalSlots not same size");
 
-        if (nonempty == 0) return -1;
+        if (nonempty == 0) return ItemStack.EMPTY;
 
         //Pick random slot
         int randomSlot = rand.nextInt(nonempty);
+        if (randomSlot < 0 || randomSlot > bagInventory.getSlots()) return ItemStack.EMPTY;
 
-        return originalSlots.get(randomSlot);
+        int originalSlot = originalSlots.get(randomSlot);
+        if (originalSlot < 0 || originalSlot > bagInventory.getSlots()) return ItemStack.EMPTY;
+
+        return bagInventory.getStackInSlot(originalSlot);
+    }
+
+    public static ItemStack findStack(IItemHandler bagInventory, Item item) {
+        for (int i = 0; i < bagInventory.getSlots(); i++) {
+            ItemStack stack = bagInventory.getStackInSlot(i);
+            if (!stack.isEmpty() && stack.getItem() == item) {
+                return stack;
+            }
+        }
+        return ItemStack.EMPTY;
     }
 
     @Override
@@ -172,4 +183,9 @@ public class ItemRandomizerBag extends Item {
         tooltip.add(TextFormatting.BLUE + "Rightclick" + TextFormatting.GRAY + " to place a random block");
         tooltip.add(TextFormatting.BLUE + "Sneak + rightclick" + TextFormatting.GRAY + " to open inventory");
     }
+
+    @Override
+    public String getUnlocalizedName() {
+        return super.getUnlocalizedName();
+    }
 }

src/main/java/nl/requios/effortlessbuilding/proxy/ClientProxy.java

@@ -1,6 +1,7 @@
 package nl.requios.effortlessbuilding.proxy;
 
 import net.minecraft.block.Block;
+import net.minecraft.block.SoundType;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.entity.EntityPlayerSP;
 import net.minecraft.client.renderer.block.model.ModelResourceLocation;
@@ -41,11 +42,12 @@ public class ClientProxy implements IProxy {
     @Override
     public void init(FMLInitializationEvent event) {
         // register key bindings
-        keyBindings = new KeyBinding[2];
+        keyBindings = new KeyBinding[3];
 
         // instantiate the key bindings
-        keyBindings[0] = new KeyBinding("key.hud.desc", Keyboard.KEY_ADD, "key.effortlessbuilding.category");
+        keyBindings[0] = new KeyBinding("key.effortlessbuilding.hud.desc", Keyboard.KEY_ADD, "key.effortlessbuilding.category");
-        keyBindings[1] = new KeyBinding("key.replace.desc", Keyboard.KEY_SUBTRACT, "key.effortlessbuilding.category");
+        keyBindings[1] = new KeyBinding("key.effortlessbuilding.replace.desc", Keyboard.KEY_SUBTRACT, "key.effortlessbuilding.category");
+        keyBindings[2] = new KeyBinding("key.effortlessbuilding.creative.desc", Keyboard.KEY_F4, "key.effortlessbuilding.category");
 
         // register all the key bindings
         for (int i = 0; i < keyBindings.length; ++i) {
@@ -105,6 +107,13 @@ public class ClientProxy implements IProxy {
             EffortlessBuilding.log(player, "Set "+ TextFormatting.GOLD + "Quick Replace " + TextFormatting.RESET + (buildSettings.doQuickReplace() ? "on" : "off"));
             EffortlessBuilding.packetHandler.sendToServer(new BuildSettingsMessage(buildSettings));
         }
+        if (keyBindings[2].isPressed()) {
+            if (player.isCreative()) {
+                player.sendChatMessage("/gamemode 0");
+            } else {
+                player.sendChatMessage("/gamemode 1");
+            }
+        }
     }
 
     @SubscribeEvent

src/main/resources/assets/effortlessbuilding/lang/en_us.lang

@@ -1,5 +1,6 @@
 key.effortlessbuilding.category=Effortless Building
-key.hud.desc=Open Settings
+key.effortlessbuilding.hud.desc=Open Settings
-key.replace.desc=Switch Replace Mode
+key.effortlessbuilding.replace.desc=Toggle QuickReplace
+key.effortlessbuilding.creative.desc=Toggle Survival/Creative Mode
 
 item.effortlessbuilding:randomizer_bag.name=Randomizer Bag