Use tall destination preview volume

README.md

@@ -26,7 +26,7 @@ right-clicking with an empty hand. Sneak-right-click with an empty hand to take
 the book back and restore the vanilla lectern. Breaking a Book Stand drops both
 the stored book and a vanilla lectern.
 
-Bound Linking Books request a server-validated 17-by-7-by-17 snapshot around
+Bound Linking Books request a server-validated 9-by-128-by-9 snapshot around
 their destination and render its blocks as a rotating Ponder scene on the left
 page, backed by the destination biome's sky color. The snapshot is visual only;
 the server independently validates every link.

docs/PORTING.md

@@ -127,6 +127,10 @@ Version 0.1.16 makes destination previews sample a centered 17-by-7-by-17
 volume. The Ponder scene uses a scale that keeps its full horizontal diagonal
 inside the panel, so the complete snapshot remains available during its orbit.
 
+Version 0.1.17 changes destination previews to a 9-by-128-by-9 volume: a
+square horizontal footprint with a vertical slice spanning 64 blocks below and
+63 blocks above the recorded linking location.
+
 The preview code is separated behind a renderer interface and uses an isolated
 Ponder level populated from server-authoritative destination snapshots.
 

gradle.properties

@@ -33,7 +33,7 @@ mod_name=Rivencraft
 # The license of the mod. Review your options at https://choosealicense.com/. All Rights Reserved is the default.
 mod_license=LGPL-3.0-or-later
 # The mod version. See https://semver.org/
-mod_version=0.1.16
+mod_version=0.1.17
 # The group ID for the mod. It is only important when publishing as an artifact to a Maven repository.
 # This should match the base package used for the mod sources.
 # See https://maven.apache.org/guides/mini/guide-naming-conventions.html

src/main/java/net/dnorberg/rivencraft/client/preview/PonderDestinationPreviewRenderer.java

@@ -43,7 +43,7 @@ public final class PonderDestinationPreviewRenderer implements DestinationPrevie
     public PonderDestinationPreviewRenderer() {
         Minecraft minecraft = Minecraft.getInstance();
         previewLevel = new PonderLevel(BlockPos.ZERO, minecraft.level);
-        selection = SelectionImpl.of(new BoundingBox(0, 0, 0, 16, 6, 16));
+        selection = SelectionImpl.of(new BoundingBox(0, 0, 0, 8, 127, 8));
         section = new WorldSectionElementImpl(selection);
     }
 
@@ -105,10 +105,10 @@ public final class PonderDestinationPreviewRenderer implements DestinationPrevie
         poseStack.mulPose(Axis.XP.rotationDegrees(-28.0F));
         poseStack.mulPose(Axis.YP.rotationDegrees((ticks + partialTick) * 0.6F));
         UIRenderHelper.flipForGuiRender(poseStack);
-        // A 17×17 footprint has a 24-block diagonal. This scale fits that
-        // diagonal in the panel, including at the 45° points of the orbit.
-        poseStack.scale(4.6F, 4.6F, 4.6F);
-        poseStack.translate(-8.5F, -1.5F, -8.5F);
+        // Fit the complete 128-block vertical slice, while keeping the 9×9
+        // footprint centered during the full horizontal orbit.
+        poseStack.scale(0.58F, 0.58F, 0.58F);
+        poseStack.translate(-4.5F, -64.0F, -4.5F);
 
         SuperRenderTypeBuffer buffer = DefaultSuperRenderTypeBuffer.getInstance();
         section.renderFirst(previewLevel, buffer, graphics, partialTick);

src/main/java/net/dnorberg/rivencraft/network/LinkPreviewPayload.java

@@ -12,8 +12,8 @@ import net.minecraft.world.level.block.Block;
 import net.minecraft.world.level.block.state.BlockState;
 
 public record LinkPreviewPayload(int skyColor, List<SnapshotBlock> blocks) implements CustomPacketPayload {
-    /** A square footprint keeps every side of the scene available during a full orbit. */
-    private static final int MAX_BLOCKS = 17 * 7 * 17;
+    /** A square footprint keeps every side visible during an orbit, with a tall vertical slice. */
+    private static final int MAX_BLOCKS = 9 * 128 * 9;
     public static final Type<LinkPreviewPayload> TYPE = new Type<>(
             ResourceLocation.fromNamespaceAndPath(Rivencraft.MOD_ID, "link_preview")
     );

src/main/java/net/dnorberg/rivencraft/network/ModNetworking.java

@@ -114,12 +114,12 @@ public final class ModNetworking {
 
         BlockPos origin = target.location().pos();
         List<LinkPreviewPayload.SnapshotBlock> blocks = new ArrayList<>();
-        // The preview rotates through a complete orbit. Use the same radius on
-        // both horizontal axes so no side falls outside the snapshot at 90°.
-        for (BlockPos pos : BlockPos.betweenClosed(origin.offset(-8, -2, -8), origin.offset(8, 4, 8))) {
+        // The square footprint survives every angle of the orbit. The vertical
+        // slice captures 64 blocks below through 63 blocks above the link point.
+        for (BlockPos pos : BlockPos.betweenClosed(origin.offset(-4, -64, -4), origin.offset(4, 63, 4))) {
             var state = level.getBlockState(pos);
             if (!state.isAir()) {
-                blocks.add(new LinkPreviewPayload.SnapshotBlock(pos.subtract(origin).offset(8, 2, 8), state));
+                blocks.add(new LinkPreviewPayload.SnapshotBlock(pos.subtract(origin).offset(4, 64, 4), state));
             }
         }
         int skyColor = level.getBiome(origin).value().getSkyColor();