reach-around

src/main/java/dev/isxander/controlify/reacharound/ReachAroundHandler.java

@@ -0,0 +1,43 @@
+package dev.isxander.controlify.reacharound;
+
+import dev.isxander.controlify.Controlify;
+import net.minecraft.core.BlockPos;
+import net.minecraft.util.Mth;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.phys.BlockHitResult;
+import net.minecraft.world.phys.HitResult;
+
+public class ReachAroundHandler {
+    public static HitResult getReachAroundHitResult(Entity entity, HitResult hitResult) {
+        // if there is already a valid hit, we don't want to override it
+        if (hitResult.getType() != HitResult.Type.MISS)
+            return hitResult;
+
+        if (!canReachAround(entity))
+            return hitResult;
+
+        // LivingEntity#playBlockFallSound - this is the location where the game determines the footstep noise
+        // maybe experiment on different values rather than 0.2f from other areas in the game?
+        int x = Mth.floor(entity.getX());
+        int y = Mth.floor(entity.getY() - 0.2F);
+        int z = Mth.floor(entity.getZ());
+        var floorPos = new BlockPos(x, y, z);
+
+        // this allows all interaction with blocks, such as opening containers, ringing bells, etc.
+        // this is consistent with bedrock edition behaviour, tested
+        return new BlockHitResult(floorPos.getCenter(), entity.getDirection(), floorPos, false);
+    }
+
+    private static boolean canReachAround(Entity cameraEntity) {
+        return  // don't want to place blocks while riding an entity
+                cameraEntity.getVehicle() == null
+                // straight ahead = 0deg, up = -90deg, down = 90deg
+                // 45deg and above is half between straight ahead and down, must be lower or equal to this threshold
+                && cameraEntity.getXRot() >= 45
+                // if the player is not standing on a block, this is inappropriate
+                // this also prevents selecting fluids as a valid position
+                && cameraEntity.isOnGround()
+                // must respect config option
+                && Controlify.instance().config().globalSettings().reachAround.canReachAround();
+    }
+}

src/main/java/dev/isxander/controlify/reacharound/ReachAroundMode.java

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+package dev.isxander.controlify.reacharound;
+
+import dev.isxander.controlify.Controlify;
+import dev.isxander.yacl.api.NameableEnum;
+import net.minecraft.client.Minecraft;
+import net.minecraft.network.chat.Component;
+
+import java.util.function.BiFunction;
+
+public enum ReachAroundMode implements NameableEnum {
+    OFF((minecraft, controlify) -> false),
+    SINGLEPLAYER_ONLY((minecraft, controlify) -> minecraft.isSingleplayer()),
+    SINGLEPLAYER_AND_LAN((minecraft, controlify) -> minecraft.isLocalServer()),
+    EVERYWHERE((minecraft, controlify) -> true);
+
+    private final BiFunction<Minecraft, Controlify, Boolean> canReachAround;
+    private final Component displayName;
+
+    ReachAroundMode(BiFunction<Minecraft, Controlify, Boolean> canReachAround) {
+        this.canReachAround = canReachAround;
+        this.displayName = Component.translatable("controlify.reach_around." + this.name().toLowerCase());
+    }
+
+    public boolean canReachAround() {
+        return canReachAround.apply(Minecraft.getInstance(), Controlify.instance());
+    }
+
+    @Override
+    public Component getDisplayName() {
+        return displayName;
+    }
+}