[Feature] AirSelectionItem allows Items to highlight/use air blocks

src/main/java/org/betterx/bclib/interfaces/AirSelectionItem.java

@@ -0,0 +1,60 @@
+package org.betterx.bclib.interfaces;
+
+import net.minecraft.util.Mth;
+import net.minecraft.world.InteractionHand;
+import net.minecraft.world.InteractionResult;
+import net.minecraft.world.InteractionResultHolder;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.context.UseOnContext;
+import net.minecraft.world.level.ClipBlockStateContext;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.block.state.BlockBehaviour;
+import net.minecraft.world.phys.BlockHitResult;
+import net.minecraft.world.phys.Vec3;
+
+public interface AirSelectionItem {
+    default boolean renderAirSelection() {
+        return true;
+    }
+
+    default int airSelectionColor() {
+        return 0xBFF6FA70;
+    }
+
+    default BlockHitResult getAirSelectionHit(Level level, Player player) {
+        if (renderAirSelection()) {
+            final var vec = new Vec3(0, 0, 1)
+                    .xRot(-player.getXRot() * Mth.DEG_TO_RAD)
+                    .yRot(-player.getYHeadRot() * Mth.DEG_TO_RAD);
+
+            return level.isBlockInLine(new ClipBlockStateContext(
+                    player.getEyePosition(),
+                    player.getEyePosition().add(vec.scale(4.9)),
+                    BlockBehaviour.BlockStateBase::isAir
+            ));
+        }
+        return null;
+    }
+
+    default InteractionResultHolder<ItemStack> useOnAir(Level level, Player player, InteractionHand interactionHand) {
+        final BlockHitResult hit = getAirSelectionHit(level, player);
+
+        if (hit != null) {
+            var result = this.useOn(new UseOnContext(player, interactionHand, hit));
+
+            if (result == InteractionResult.SUCCESS)
+                return InteractionResultHolder.success(player.getItemInHand(interactionHand));
+            else if (result == InteractionResult.FAIL)
+                return InteractionResultHolder.fail(player.getItemInHand(interactionHand));
+            else if (result == InteractionResult.PASS)
+                return InteractionResultHolder.pass(player.getItemInHand(interactionHand));
+            else if (result == InteractionResult.CONSUME)
+                return InteractionResultHolder.consume(player.getItemInHand(interactionHand));
+        }
+
+        return InteractionResultHolder.pass(player.getItemInHand(interactionHand));
+    }
+
+    InteractionResult useOn(UseOnContext useOnContext);
+}

src/main/java/org/betterx/bclib/items/DebugDataItem.java

@@ -3,6 +3,7 @@ package org.betterx.bclib.items;
 import de.ambertation.wunderlib.math.Bounds;
 import org.betterx.bclib.client.models.ModelsHelper;
 import org.betterx.bclib.commands.PlaceCommand;
+import org.betterx.bclib.interfaces.AirSelectionItem;
 import org.betterx.bclib.interfaces.ItemModelProvider;
 import org.betterx.bclib.util.BlocksHelper;
 import org.betterx.ui.ColorUtil;
@@ -20,7 +21,6 @@ import net.minecraft.network.chat.Style;
 import net.minecraft.resources.ResourceKey;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.server.level.ServerPlayer;
-import net.minecraft.util.Mth;
 import net.minecraft.world.InteractionHand;
 import net.minecraft.world.InteractionResult;
 import net.minecraft.world.InteractionResultHolder;
@@ -28,7 +28,6 @@ import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.item.Item;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.context.UseOnContext;
-import net.minecraft.world.level.ClipBlockStateContext;
 import net.minecraft.world.level.Level;
 import net.minecraft.world.level.block.Blocks;
 import net.minecraft.world.level.block.JigsawBlock;
@@ -36,11 +35,8 @@ import net.minecraft.world.level.block.entity.BlockEntity;
 import net.minecraft.world.level.block.entity.JigsawBlockEntity;
 import net.minecraft.world.level.block.entity.RandomizableContainerBlockEntity;
 import net.minecraft.world.level.block.entity.StructureBlockEntity;
-import net.minecraft.world.level.block.state.BlockBehaviour;
 import net.minecraft.world.level.block.state.BlockState;
 import net.minecraft.world.level.levelgen.structure.pools.StructureTemplatePool;
-import net.minecraft.world.phys.BlockHitResult;
-import net.minecraft.world.phys.Vec3;
 
 import net.fabricmc.api.EnvType;
 import net.fabricmc.api.Environment;
@@ -48,7 +44,7 @@ import net.fabricmc.api.Environment;
 import java.util.HashSet;
 import java.util.Set;
 
-public class DebugDataItem extends Item implements ItemModelProvider {
+public class DebugDataItem extends Item implements ItemModelProvider, AirSelectionItem {
 
     public static final ResourceLocation DEFAULT_ICON = new ResourceLocation("stick");
 
@@ -134,7 +130,7 @@ public class DebugDataItem extends Item implements ItemModelProvider {
 
         if (predicate.test(level.getBlockState(pos))) {
             level.setBlock(pos, newState, BlocksHelper.SET_SILENT);
-            
+
             floodFillStructureEntityBounds(level, bounds, pos.above(), entity, predicate, newState, visited);
             floodFillStructureEntityBounds(level, bounds, pos.below(), entity, predicate, newState, visited);
             floodFillStructureEntityBounds(level, bounds, pos.north(), entity, predicate, newState, visited);
@@ -177,6 +173,11 @@ public class DebugDataItem extends Item implements ItemModelProvider {
         this.placeInAir = placeInAir;
     }
 
+
+    public boolean renderAirSelection() {
+        return placeInAir;
+    }
+
     @Override
     public boolean isFoil(ItemStack itemStack) {
         return true;
@@ -218,32 +219,7 @@ public class DebugDataItem extends Item implements ItemModelProvider {
 
     @Override
     public InteractionResultHolder<ItemStack> use(Level level, Player player, InteractionHand interactionHand) {
-        if (placeInAir) {
+        return AirSelectionItem.super.useOnAir(level, player, interactionHand);
-            final var vec = new Vec3(0, 0, 1)
-                    .xRot(-player.getXRot() * Mth.DEG_TO_RAD)
-                    .yRot(-player.getYHeadRot() * Mth.DEG_TO_RAD);
-
-            BlockHitResult hit = level.isBlockInLine(new ClipBlockStateContext(
-                    player.getEyePosition(),
-                    player.getEyePosition().add(vec.scale(4.9)),
-                    BlockBehaviour.BlockStateBase::isAir
-            ));
-
-            if (hit != null) {
-                var result = this.useOn(new UseOnContext(player, interactionHand, hit));
-
-                if (result == InteractionResult.SUCCESS)
-                    return InteractionResultHolder.success(player.getItemInHand(interactionHand));
-                else if (result == InteractionResult.FAIL)
-                    return InteractionResultHolder.fail(player.getItemInHand(interactionHand));
-                else if (result == InteractionResult.PASS)
-                    return InteractionResultHolder.pass(player.getItemInHand(interactionHand));
-                else if (result == InteractionResult.CONSUME)
-                    return InteractionResultHolder.consume(player.getItemInHand(interactionHand));
-            }
-        }
-
-        return InteractionResultHolder.pass(player.getItemInHand(interactionHand));
     }
 
     public static DebugDataItem forLootTable(ResourceLocation table, Item icon) {

src/main/java/org/betterx/bclib/mixin/client/LevelRendererMixin.java

@@ -1,16 +1,20 @@
 package org.betterx.bclib.mixin.client;
 
 import org.betterx.bclib.BCLib;
-import org.betterx.bclib.items.DebugDataItem;
+import org.betterx.bclib.interfaces.AirSelectionItem;
 
 import com.mojang.blaze3d.vertex.PoseStack;
 import com.mojang.blaze3d.vertex.VertexConsumer;
 import net.minecraft.client.Camera;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.*;
+import net.minecraft.core.BlockPos;
+import net.minecraft.util.FastColor;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.level.block.Blocks;
+import net.minecraft.world.level.block.state.BlockState;
 import net.minecraft.world.phys.BlockHitResult;
+import net.minecraft.world.phys.HitResult;
 import net.minecraft.world.phys.Vec3;
 import net.minecraft.world.phys.shapes.CollisionContext;
 import net.minecraft.world.phys.shapes.VoxelShape;
@@ -66,18 +70,26 @@ public abstract class LevelRendererMixin {
         if (BCLib.isDevEnvironment() && minecraft.hitResult instanceof BlockHitResult blockHitResult) {
             //will render a block outline when empty blocks are targeted
             ItemStack item = minecraft.player.getMainHandItem();
-            if (item != null && (item.getItem() instanceof DebugDataItem ddi) && ddi.placeInAir) {
+            if (item != null
-                final var pos = blockHitResult.getBlockPos();
+                    && (item.getItem() instanceof AirSelectionItem airSelect)
-                final var state = Blocks.DIRT.defaultBlockState();
+                    && airSelect.renderAirSelection()
-                MultiBufferSource.BufferSource bufferSource = this.renderBuffers.bufferSource();
+                    && blockHitResult.getType() == HitResult.Type.MISS
-                VertexConsumer consumer = bufferSource.getBuffer(RenderType.lines());
+            ) {
-                Vec3 camPos = camera.getPosition();
+                final BlockPos pos = blockHitResult.getBlockPos();
+                final BlockState state = Blocks.DIRT.defaultBlockState();
+                final int color = airSelect.airSelectionColor();
+                final MultiBufferSource.BufferSource bufferSource = this.renderBuffers.bufferSource();
+                final VertexConsumer consumer = bufferSource.getBuffer(RenderType.lines());
+                final Vec3 camPos = camera.getPosition();
 
                 this.renderShape(
                         poseStack, consumer,
                         state.getShape(minecraft.level, pos, CollisionContext.of(camera.getEntity())),
                         pos.getX() - camPos.x(), pos.getY() - camPos.y(), pos.getZ() - camPos.z(),
-                        246.0f / 0xff, 250.0f / 0xff, 112.0f / 0xff, 0.75F
+                        FastColor.ARGB32.red(color) / (float) 0xff,
+                        FastColor.ARGB32.green(color) / (float) 0xff,
+                        FastColor.ARGB32.blue(color) / (float) 0xff,
+                        FastColor.ARGB32.alpha(color) / (float) 0xff
                 );
             }
         }