Render Legacy glyph pages and base-25 desk numerals

src/main/java/net/dnorberg/rivencraft/client/ClientEvents.java

@@ -13,6 +13,10 @@ import net.neoforged.fml.event.lifecycle.FMLClientSetupEvent;
 import net.neoforged.neoforge.common.NeoForge;
 import net.neoforged.neoforge.client.event.EntityRenderersEvent;
 import net.neoforged.neoforge.client.event.RegisterMenuScreensEvent;
+import net.neoforged.neoforge.client.event.RegisterClientReloadListenersEvent;
+import net.neoforged.neoforge.client.extensions.common.IClientItemExtensions;
+import net.neoforged.neoforge.client.extensions.common.RegisterClientExtensionsEvent;
+import net.minecraft.client.renderer.BlockEntityWithoutLevelRenderer;
 import net.dnorberg.rivencraft.client.screen.NotebookScreen;
 import net.dnorberg.rivencraft.client.screen.WritingDeskScreen;
 import net.dnorberg.rivencraft.client.screen.BookBinderScreen;
@@ -38,6 +42,24 @@ public final class ClientEvents {
         event.register(ModMenus.INK_MIXER.get(), InkMixerScreen::new);
     }
 
+    @SubscribeEvent
+    public static void registerPageItemRenderer(RegisterClientExtensionsEvent event) {
+        event.registerItem(new IClientItemExtensions() {
+            private final SymbolPageItemRenderer renderer = new SymbolPageItemRenderer();
+
+            @Override
+            public BlockEntityWithoutLevelRenderer getCustomRenderer() {
+                return renderer;
+            }
+        }, ModItems.PAGE.get());
+    }
+
+    @SubscribeEvent
+    public static void registerPageTextureReload(RegisterClientReloadListenersEvent event) {
+        event.registerReloadListener((net.minecraft.server.packs.resources.ResourceManagerReloadListener)
+                manager -> SymbolPageTextures.clear());
+    }
+
     @SubscribeEvent
     public static void clientSetup(FMLClientSetupEvent event) {
         event.enqueueWork(() -> ItemProperties.register(

src/main/java/net/dnorberg/rivencraft/client/SymbolPageItemRenderer.java

@@ -0,0 +1,47 @@
+package net.dnorberg.rivencraft.client;
+
+import com.mojang.blaze3d.vertex.PoseStack;
+import com.mojang.blaze3d.vertex.VertexConsumer;
+import net.dnorberg.rivencraft.Rivencraft;
+import net.dnorberg.rivencraft.item.PageItem;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.renderer.BlockEntityWithoutLevelRenderer;
+import net.minecraft.client.renderer.MultiBufferSource;
+import net.minecraft.client.renderer.RenderType;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.item.ItemDisplayContext;
+import net.minecraft.world.item.ItemStack;
+
+/** Flat page model whose symbol artwork is resolved from the stack at render time. */
+public final class SymbolPageItemRenderer extends BlockEntityWithoutLevelRenderer {
+    public SymbolPageItemRenderer() {
+        super(Minecraft.getInstance().getBlockEntityRenderDispatcher(), Minecraft.getInstance().getEntityModels());
+    }
+
+    @Override
+    public void renderByItem(ItemStack stack, ItemDisplayContext context, PoseStack pose,
+                             MultiBufferSource buffers, int light, int overlay) {
+        ResourceLocation texture = switch (PageItem.content(stack).kind()) {
+            case BLANK -> texture("page");
+            case LINK_PANEL -> texture("page_link_panel");
+            case UNRESOLVED_SYMBOL -> texture("page_unresolved");
+            case SYMBOL -> SymbolPageTextures.forItem(stack);
+        };
+        VertexConsumer vertices = buffers.getBuffer(RenderType.entityCutoutNoCull(texture));
+        var matrix = pose.last().pose();
+        vertex(vertices, matrix, 0, 0, 0, 1, light, overlay);
+        vertex(vertices, matrix, 1, 0, 1, 1, light, overlay);
+        vertex(vertices, matrix, 1, 1, 1, 0, light, overlay);
+        vertex(vertices, matrix, 0, 1, 0, 0, light, overlay);
+    }
+
+    private static void vertex(VertexConsumer vertices, org.joml.Matrix4f matrix,
+                               float x, float y, float u, float v, int light, int overlay) {
+        vertices.addVertex(matrix, x, y, 0.5F).setColor(255, 255, 255, 255)
+                .setUv(u, v).setOverlay(overlay).setLight(light).setNormal(0, 0, 1);
+    }
+
+    private static ResourceLocation texture(String name) {
+        return ResourceLocation.fromNamespaceAndPath(Rivencraft.MOD_ID, "textures/item/" + name + ".png");
+    }
+}

src/main/java/net/dnorberg/rivencraft/client/SymbolPageTextures.java

@@ -0,0 +1,240 @@
+package net.dnorberg.rivencraft.client;
+
+import com.mojang.blaze3d.platform.NativeImage;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.LinkedHashMap;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Random;
+import net.dnorberg.rivencraft.Rivencraft;
+import net.dnorberg.rivencraft.item.PageItem;
+import net.dnorberg.rivencraft.registry.ModDataComponents;
+import net.dnorberg.rivencraft.writing.PageContent;
+import net.dnorberg.rivencraft.writing.SymbolDisplayMetadata;
+import net.dnorberg.rivencraft.writing.SymbolPoems;
+import net.dnorberg.rivencraft.writing.SymbolNumerals;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.GuiGraphics;
+import net.minecraft.client.renderer.texture.DynamicTexture;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.server.packs.resources.ResourceManager;
+import net.minecraft.world.item.ItemStack;
+
+/** Client-only, bounded cache of Legacy-style page compositions; no per-symbol PNGs. */
+public final class SymbolPageTextures {
+    private static final int SIZE = 128;
+    private static final int GLYPH = 51;
+    // A 16 px item icon displays a 13 px symbol: three pixels narrower overall.
+    private static final int ITEM_SYMBOL_SIZE = 13;
+    private static final int ICON_SIZE = 16;
+    private static final int CACHE_LIMIT = 256;
+    private static final ResourceLocation BASE = texture("item/page");
+    private static final ResourceLocation COMPONENTS = texture("gui/symbolcomponents");
+    private static final ResourceLocation FALLBACK = texture("item/page_symbol");
+    private static final Map<String, ResourceLocation> CACHE = new LinkedHashMap<>(16, .75F, true);
+    private static final Map<String, int[]> WORD_CACHE = new LinkedHashMap<>(16, .75F, true);
+    private static NativeImage base;
+    private static NativeImage components;
+    private static int nextId;
+
+    // WordData from Mystcraft Legacy 0.13.7.06. Other words get a stable generated glyph.
+    private static final Map<String, int[]> WORDS = Map.ofEntries(
+            Map.entry("Terrain", new int[] {6,10,12,13,16,19,24,25,27}),
+            Map.entry("Form", new int[] {4,6,8,9,10,11,13,14,16,23}),
+            Map.entry("Tradition", new int[] {4,6,7,8,9,14,17,18,20}),
+            Map.entry("Flow", new int[] {4,7,12,13,17,18}),
+            Map.entry("Constraint", new int[] {5,6,9,11,13,20,22,23}),
+            Map.entry("Nature", new int[] {5,6,8,10,11,12,15,16,17,22}),
+            Map.entry("Sustain", new int[] {6,16,19,20,21,23}),
+            Map.entry("Ethereal", new int[] {4,6,8,13,14,16,18,21,23}),
+            Map.entry("Dynamic", new int[] {4,5,6,12,13,17,18,22,23}),
+            Map.entry("Cycle", new int[] {4,5,7,16,17,18}),
+            Map.entry("Balance", new int[] {4,6,9,10,16,19}),
+            Map.entry("Transform", new int[] {4,5,6,8,11,14,18,20,21}),
+            Map.entry("Time", new int[] {4,5,7,12,13,19,20,21,22,23}),
+            Map.entry("System", new int[] {10,12,14,15,16,20,21,22}),
+            Map.entry("Void", new int[] {4,5,6,16,17,18,23})
+    );
+
+    private SymbolPageTextures() {}
+
+    /** Transparent full-size artwork for GUI thumbnails drawn over their own page background. */
+    public static ResourceLocation forPage(ItemStack stack) {
+        return forPage(stack, false);
+    }
+
+    /** Full page texture with artwork reduced by three pixels at 16 px item-icon scale. */
+    public static ResourceLocation forItem(ItemStack stack) {
+        return forPage(stack, true);
+    }
+
+    private static ResourceLocation forPage(ItemStack stack, boolean item) {
+        PageContent content = PageItem.content(stack);
+        if (content.kind() == PageContent.Kind.UNRESOLVED_SYMBOL) return texture("item/page_unresolved");
+        if (content.kind() != PageContent.Kind.SYMBOL) return FALLBACK;
+        SymbolDisplayMetadata metadata = stack.get(ModDataComponents.PAGE_SYMBOL_DISPLAY.get());
+        ResourceLocation id = content.symbol().orElseThrow().id();
+        return forSymbol(id, metadata == null ? "" : metadata.poem(), item);
+    }
+
+    private static ResourceLocation forSymbol(ResourceLocation id, String poem, boolean item) {
+        if (poem.length() > 96 || !poem.matches("[A-Za-z]+(?: [A-Za-z]+){3}")) poem = "";
+        if (poem.isEmpty()) poem = SymbolPoems.builtIn(id);
+        String key = id + "|" + poem + (item ? "|item" : "|thumbnail");
+        ResourceLocation cached = CACHE.get(key);
+        if (cached != null) return cached;
+        try {
+            loadSources(Minecraft.getInstance().getResourceManager());
+            NativeImage image = compose(id, poem, item);
+            ResourceLocation location = ResourceLocation.fromNamespaceAndPath(
+                    Rivencraft.MOD_ID, "generated/page_" + nextId++);
+            Minecraft.getInstance().getTextureManager().register(location, new DynamicTexture(image));
+            CACHE.put(key, location);
+            if (CACHE.size() > CACHE_LIMIT) {
+                String eldest = CACHE.keySet().iterator().next();
+                Minecraft.getInstance().getTextureManager().release(CACHE.remove(eldest));
+            }
+            return location;
+        } catch (IOException exception) {
+            Rivencraft.LOGGER.error("Could not compose symbol page {}", id, exception);
+            return FALLBACK;
+        }
+    }
+
+    public static void clear() {
+        var textures = Minecraft.getInstance().getTextureManager();
+        CACHE.values().forEach(textures::release);
+        CACHE.clear();
+        WORD_CACHE.clear();
+        if (base != null) base.close();
+        if (components != null) components.close();
+        base = null;
+        components = null;
+    }
+
+    private static void loadSources(ResourceManager manager) throws IOException {
+        if (base != null && components != null) return;
+        try (InputStream page = manager.getResourceOrThrow(BASE).open();
+             InputStream sheet = manager.getResourceOrThrow(COMPONENTS).open()) {
+            base = NativeImage.read(page);
+            components = NativeImage.read(sheet);
+        }
+    }
+
+    private static NativeImage compose(ResourceLocation id, String poem, boolean item) {
+        // GUI variants have no parchment layer, so their untouched pixels must be transparent.
+        NativeImage image = new NativeImage(SIZE, SIZE, true);
+        if (item) {
+            for (int y = 0; y < SIZE; y++) for (int x = 0; x < SIZE; x++) {
+                image.setPixelRGBA(x, y, base.getPixelRGBA(x * base.getWidth() / SIZE,
+                        y * base.getHeight() / SIZE));
+            }
+        }
+        String[] words = poem.isBlank() ? generatedWords(id) : poem.split(" ");
+        int[] offsetsX = {38, 77, 38, 0};
+        int[] offsetsY = {0, 38, 77, 38};
+        int glyphSize = item ? GLYPH * ITEM_SYMBOL_SIZE / ICON_SIZE : GLYPH;
+        for (int word = 0; word < 4; word++) {
+            int originX = item ? scaleForItem(offsetsX[word]) : offsetsX[word];
+            int originY = item ? scaleForItem(offsetsY[word]) : offsetsY[word];
+            for (int component : glyphs(words[word])) {
+                for (int y = 0; y < glyphSize; y++) for (int x = 0; x < glyphSize; x++) {
+                    int pixel = components.getPixelRGBA((component % 8) * 64 + x * 64 / glyphSize,
+                            (component / 8) * 64 + y * 64 / glyphSize);
+                    int alpha = pixel >>> 24;
+                    if (alpha != 0) image.blendPixel(originX + x, originY + y,
+                            (alpha << 24) | 0x001A212B);
+                }
+            }
+        }
+        return image;
+    }
+
+    private static int scaleForItem(int coordinate) {
+        return SIZE / 2 + Math.round((coordinate - SIZE / 2F) * ITEM_SYMBOL_SIZE / ICON_SIZE);
+    }
+
+    private static String[] generatedWords(ResourceLocation id) {
+        String stem = id.toString();
+        return new String[] {stem + 'a', stem + 'b', stem + 'c', stem + 'd'};
+    }
+
+    private static int[] glyphs(String word) {
+        int[] known = WORDS.get(word);
+        if (known != null) return known;
+        String key = word.toLowerCase(Locale.ROOT);
+        int[] cached = WORD_CACHE.get(key);
+        if (cached != null) return cached;
+        Random random = new Random(key.hashCode());
+        int[] components = new int[random.nextInt(10) + 3];
+        for (int index = 0; index < components.length; index++) components[index] = random.nextInt(20) + 4;
+        WORD_CACHE.put(key, components);
+        if (WORD_CACHE.size() > CACHE_LIMIT) WORD_CACHE.remove(WORD_CACHE.keySet().iterator().next());
+        return components;
+    }
+
+    /** Draw a word as a layered Legacy glyph, or a number with Legacy's number components. */
+    public static void drawWordGlyph(GuiGraphics graphics, String word, int x, int y, int size) {
+        if (word.matches("[0-9]+")) {
+            try {
+                drawNumeral(graphics, Integer.parseInt(word), x, y, size);
+                return;
+            } catch (NumberFormatException ignored) {
+                // Oversized numerals still receive a stable word glyph.
+            }
+        }
+        graphics.setColor(0.13F, 0.10F, 0.08F, 1F);
+        for (int component : glyphs(word)) drawComponent(graphics, component, x, y, size);
+        graphics.setColor(1F, 1F, 1F, 1F);
+    }
+
+    /** Legacy's single-number marks; numbers above 24 use positional base 25. */
+    public static void drawNumeral(GuiGraphics graphics, int number, int x, int y, int size) {
+        int[] digits = SymbolNumerals.digitsFor(number);
+        int digitSize = digits.length == 1 ? size : Math.max(8, size * 3 / 4);
+        graphics.setColor(0.13F, 0.10F, 0.08F, 1F);
+        for (int digit : digits) {
+            for (int component : SymbolNumerals.componentsForDigit(digit))
+                drawComponent(graphics, component, x, y + (size - digitSize) / 2, digitSize);
+            x += digitSize + 1;
+        }
+        graphics.setColor(1F, 1F, 1F, 1F);
+    }
+
+    /** Render translated prose as a sequence of word glyphs within a fixed-width book page. */
+    public static int drawGlyphText(GuiGraphics graphics, String text, int x, int y, int maxWidth) {
+        int cursor = x;
+        boolean drew = false;
+        for (String word : text.split("[^\\p{L}\\p{N}]+")) {
+            if (word.isEmpty()) continue;
+            int width = word.matches("[0-9]+") ? numeralWidth(word, 12) : 12;
+            if (cursor != x && cursor + width > x + maxWidth) {
+                cursor = x;
+                y += 13;
+            }
+            drawWordGlyph(graphics, word, cursor, y, 12);
+            cursor += width + 3;
+            drew = true;
+        }
+        return y + (drew ? 13 : 0);
+    }
+
+    private static int numeralWidth(String word, int size) {
+        try {
+            int count = SymbolNumerals.digitsFor(Integer.parseInt(word)).length;
+            return count == 1 ? size : count * (size * 3 / 4 + 1) - 1;
+        } catch (NumberFormatException ignored) {
+            return size;
+        }
+    }
+
+    private static void drawComponent(GuiGraphics graphics, int component, int x, int y, int size) {
+        graphics.blit(COMPONENTS, x, y, size, size,
+                (component % 8) * 64, (component / 8) * 64, 64, 64, 512, 512);
+    }
+
+    private static ResourceLocation texture(String path) {
+        return ResourceLocation.fromNamespaceAndPath(Rivencraft.MOD_ID, "textures/" + path + ".png");
+    }
+}

src/main/java/net/dnorberg/rivencraft/client/screen/BookBinderScreen.java

@@ -146,7 +146,7 @@ public final class BookBinderScreen extends AbstractContainerScreen<BookBinderMe
             case BLANK -> { }
             case LINK_PANEL -> graphics.fill(x + 5, y + 6, x + 22, y + 17, 0xFF000000);
             case SYMBOL, UNRESOLVED_SYMBOL -> graphics.blit(NotebookScreen.symbolTexture(page),
-                    x + 1, y + 5, 24, 24, 16, 16, 96, 96, 128, 128);
+                    x + 1, y + 5, 24, 24, 0, 0, 128, 128, 128, 128);
         }
     }
 

src/main/java/net/dnorberg/rivencraft/client/screen/DescriptiveBookScreen.java

@@ -5,6 +5,7 @@ import java.util.Locale;
 import net.dnorberg.rivencraft.book.AgeReference;
 import net.dnorberg.rivencraft.book.AgeTraits;
 import net.dnorberg.rivencraft.client.ClientBookExploreOverlay;
+import net.dnorberg.rivencraft.client.SymbolPageTextures;
 import net.dnorberg.rivencraft.network.UseDescriptiveBookPayload;
 import net.dnorberg.rivencraft.network.BindDescriptiveBookPayload;
 import net.dnorberg.rivencraft.network.ModNetworking;
@@ -37,7 +38,6 @@ import org.jetbrains.annotations.Nullable;
 public final class DescriptiveBookScreen extends Screen implements ExplorableBookScreen {
     private static final int BOOK_TEXT_COLOR = 0xFF3B281B;
     private static final int UNRESOLVED_TEXT_COLOR = 0xFF9B302C;
-    private static final ResourceLocation ENCHANTMENT_FONT = ResourceLocation.withDefaultNamespace("alt");
     private static final int BOOK_WIDTH = 327;
     private static final int BOOK_HEIGHT = 199;
     private static final int LINK_PANEL_X = 173;
@@ -211,7 +211,7 @@ public final class DescriptiveBookScreen extends Screen implements ExplorableBoo
             Component profileName = generationProfile.getNamespace().equals("rivencraft")
                     ? Component.translatable("generator.rivencraft." + generationProfile.getPath())
                     : Component.literal(generationProfile.toString());
-            detailsY = drawWrappedWithoutShadow(graphics,
+            detailsY = drawDescription(graphics,
                     Component.translatable("screen.rivencraft.age.generator", profileName),
                     x, detailsY, 110) + 2;
         }
@@ -415,10 +415,16 @@ public final class DescriptiveBookScreen extends Screen implements ExplorableBoo
     }
 
     private int drawTrait(GuiGraphics graphics, String key, Component value, int x, int y) {
-        return drawWrappedWithoutShadow(graphics,
+        return drawDescription(graphics,
                 Component.translatable("screen.rivencraft.age.trait." + key, value), x, y, 110) + 2;
     }
 
+    private int drawDescription(GuiGraphics graphics, Component text, int x, int y, int maxWidth) {
+        return pageFree && age != null
+                ? SymbolPageTextures.drawGlyphText(graphics, text.getString(), x, y, maxWidth)
+                : drawWrappedWithoutShadow(graphics, text, x, y, maxWidth);
+    }
+
     private static Component traitName(String group, Enum<?> value) {
         return Component.translatable("trait.rivencraft." + group + "."
                 + value.name().toLowerCase(Locale.ROOT));
@@ -429,9 +435,7 @@ public final class DescriptiveBookScreen extends Screen implements ExplorableBoo
     }
 
     private int drawWrappedWithoutShadow(GuiGraphics graphics, Component text, int x, int y, int maxWidth, int color) {
-        Component displayed = pageFree && age != null && pageIndex == 0
-                ? text.copy().withStyle(style -> style.withFont(ENCHANTMENT_FONT)) : text;
-        for (FormattedCharSequence line : font.split(displayed, maxWidth)) {
+        for (FormattedCharSequence line : font.split(text, maxWidth)) {
             graphics.drawString(font, line, x, y, color, false);
             y += font.lineHeight;
         }

src/main/java/net/dnorberg/rivencraft/client/screen/NotebookScreen.java

@@ -3,6 +3,7 @@ package net.dnorberg.rivencraft.client.screen;
 import java.util.Locale;
 import net.dnorberg.rivencraft.Rivencraft;
 import net.dnorberg.rivencraft.item.PageItem;
+import net.dnorberg.rivencraft.client.SymbolPageTextures;
 import net.dnorberg.rivencraft.menu.NotebookMenu;
 import net.dnorberg.rivencraft.registry.ModItems;
 import net.minecraft.client.gui.GuiGraphics;
@@ -26,14 +27,6 @@ public final class NotebookScreen extends AbstractContainerScreen<NotebookMenu>
     private static final int PAGE_STEP_Y = 41;
     private static final int PAGE_COLUMNS = 5;
     private static final ResourceLocation PAGE_ATLAS = texture("gui/notebook_pages");
-    private static final ResourceLocation GENERIC_SYMBOL = texture("item/page_symbol");
-    private static final ResourceLocation UNRESOLVED_SYMBOL = texture("item/page_unresolved");
-    private static final ResourceLocation STANDARD_TERRAIN = texture("item/page_symbol_terrain_standard");
-    private static final ResourceLocation NATIVE_BIOMES = texture("item/page_symbol_biome_native");
-    private static final ResourceLocation NORMAL_LIGHTING = texture("item/page_symbol_lighting_normal");
-    private static final ResourceLocation NORMAL_WEATHER = texture("item/page_symbol_weather_normal");
-    private static final ResourceLocation NORMAL_TIME = texture("item/page_symbol_celestial_normal_time");
-    private static final ResourceLocation CAVES = texture("item/page_symbol_feature_caves");
     private EditBox textInput;
     private boolean draggingScrollbar;
     private boolean surfaceClickPendingRelease;
@@ -262,7 +255,7 @@ public final class NotebookScreen extends AbstractContainerScreen<NotebookMenu>
                 case BLANK -> { }
                 case LINK_PANEL -> graphics.fill(x + 5, y + 6, x + 25, y + 20, 0xFF000000);
                 case SYMBOL, UNRESOLVED_SYMBOL -> graphics.blit(symbolTexture(page), x + 1, y + 6,
-                        28, 28, 16, 16, 96, 96, 128, 128);
+                        28, 28, 0, 0, 128, 128, 128, 128);
             }
         }
         if (dimmed) {
@@ -274,23 +267,7 @@ public final class NotebookScreen extends AbstractContainerScreen<NotebookMenu>
     }
 
     static ResourceLocation symbolTexture(ItemStack page) {
-        var content = PageItem.content(page);
-        if (content.kind() == net.dnorberg.rivencraft.writing.PageContent.Kind.UNRESOLVED_SYMBOL) {
-            return UNRESOLVED_SYMBOL;
-        }
-        return symbolTexture(content.symbol().orElseThrow().id());
-    }
-
-    static ResourceLocation symbolTexture(ResourceLocation id) {
-        return switch (id.toString()) {
-            case "rivencraft:terrain/standard" -> STANDARD_TERRAIN;
-            case "rivencraft:biome/native" -> NATIVE_BIOMES;
-            case "rivencraft:lighting/normal" -> NORMAL_LIGHTING;
-            case "rivencraft:weather/normal" -> NORMAL_WEATHER;
-            case "rivencraft:celestial/normal_time" -> NORMAL_TIME;
-            case "rivencraft:feature/caves" -> CAVES;
-            default -> GENERIC_SYMBOL;
-        };
+        return SymbolPageTextures.forPage(page);
     }
 
     private static ResourceLocation texture(String path) {

src/main/java/net/dnorberg/rivencraft/client/screen/WritingDeskScreen.java

@@ -5,6 +5,7 @@ import java.util.Locale;
 import java.util.ArrayList;
 import java.util.Comparator;
 import net.dnorberg.rivencraft.Rivencraft;
+import net.dnorberg.rivencraft.client.SymbolPageTextures;
 import net.dnorberg.rivencraft.item.PageItem;
 import net.dnorberg.rivencraft.menu.WritingDeskMenu;
 import net.dnorberg.rivencraft.block.entity.WritingDeskBlockEntity;
@@ -148,7 +149,8 @@ public final class WritingDeskScreen extends AbstractContainerScreen<WritingDesk
             if (tab == menu.activeCollection() && !allMode) graphics.setColor(0.5F, 0.5F, 1F, 1F);
             graphics.blit(LEGACY_DESK, x, tabY, 0, 166, 58, 37);
             graphics.setColor(1F, 1F, 1F, 1F);
-            graphics.drawString(font, Integer.toString(tab + 1), x + 8, tabY + 8, 0xFF181818, false);
+            // Encode the visible one-based tab number with Legacy's numeric word glyph.
+            SymbolPageTextures.drawNumeral(graphics, tab + 1, x + 8, tabY + 3, 19);
             ItemStack collection = menu.getSlot(tab).getItem();
             if (!collection.isEmpty()) {
                 String name = collection.getHoverName().getString();
@@ -220,6 +222,11 @@ public final class WritingDeskScreen extends AbstractContainerScreen<WritingDesk
                 graphics.renderTooltip(font, Component.translatable("screen.rivencraft.writing_desk.previous_tabs"), mouseX, mouseY);
             else if (localY >= 177 && localY < 186)
                 graphics.renderTooltip(font, Component.translatable("screen.rivencraft.writing_desk.next_tabs"), mouseX, mouseY);
+            else if (mouseX < leftPos + 34 && localY >= 29 && localY < 177) {
+                int tab = menu.firstVisibleTab() + (localY - 29) / 37;
+                graphics.renderTooltip(font, Component.translatable("screen.rivencraft.writing_desk.tab_symbol",
+                        tab + 1), mouseX, mouseY);
+            }
         }
     }
 
@@ -270,7 +277,7 @@ public final class WritingDeskScreen extends AbstractContainerScreen<WritingDesk
             case BLANK -> { }
             case LINK_PANEL -> graphics.fill(x + 5, y + 6, x + 25, y + 20, 0xFF000000);
             case SYMBOL, UNRESOLVED_SYMBOL -> graphics.blit(NotebookScreen.symbolTexture(page), x + 1, y + 6,
-                    28, 28, 16, 16, 96, 96, 128, 128);
+                    28, 28, 0, 0, 128, 128, 128, 128);
         }
     }
 

src/main/java/net/dnorberg/rivencraft/gametest/WritingDataGameTests.java

@@ -3,6 +3,7 @@ package net.dnorberg.rivencraft.gametest;
 import com.google.gson.JsonParser;
 import com.mojang.serialization.JsonOps;
 import io.netty.buffer.Unpooled;
+import java.util.Arrays;
 import java.util.List;
 import java.util.UUID;
 import net.dnorberg.rivencraft.book.AgeReference;
@@ -11,6 +12,8 @@ import net.dnorberg.rivencraft.writing.PageContent;
 import net.dnorberg.rivencraft.writing.SymbolCatalog;
 import net.dnorberg.rivencraft.writing.SymbolDefinition;
 import net.dnorberg.rivencraft.writing.SymbolSemantics;
+import net.dnorberg.rivencraft.writing.SymbolPoems;
+import net.dnorberg.rivencraft.writing.SymbolNumerals;
 import net.dnorberg.rivencraft.writing.SymbolReference;
 import net.dnorberg.rivencraft.writing.WritingEntry;
 import net.dnorberg.rivencraft.writing.NotebookContents;
@@ -109,6 +112,20 @@ public final class WritingDataGameTests {
         helper.assertValueEqual(builtIn.schemaVersion(), 2, "Built-in symbol must use semantic schema v2");
         helper.assertValueEqual(builtIn.semantics().orElseThrow().role(), SymbolSemantics.Role.TERRAIN,
                 "Built-in terrain symbol must declare its grammar role");
+        helper.assertValueEqual(builtIn.poem(), "Terrain Form Tradition Flow",
+                "Built-in page artwork must carry its four-word Legacy poem");
+        helper.assertValueEqual(SymbolPoems.builtIn(reference("rivencraft:terrain/standard").id()), builtIn.poem(),
+                "Pre-artwork saved starter pages must retain their original poem");
+        helper.assertTrue(Arrays.equals(SymbolNumerals.componentsForDigit(0), new int[] {1}),
+                "Zero must use Legacy's dedicated number mark");
+        helper.assertTrue(Arrays.equals(SymbolNumerals.componentsForDigit(1), new int[] {56}),
+                "One must use Legacy's first bottom-row mark");
+        helper.assertTrue(Arrays.equals(SymbolNumerals.componentsForDigit(24), new int[] {63, 59}),
+                "Twenty-four must combine Legacy's five and unit marks");
+        helper.assertTrue(Arrays.equals(SymbolNumerals.digitsFor(25), new int[] {1, 0}),
+                "Twenty-five must start a second base-25 place");
+        helper.assertTrue(Arrays.equals(SymbolNumerals.digitsFor(88), new int[] {3, 13}),
+                "Last writing-desk tab must retain its numeric value");
 
         String display = "\"name\":\"symbol.example.test\","
                 + "\"description\":\"symbol.example.test.description\","
@@ -146,6 +163,10 @@ public final class WritingDataGameTests {
                 .encodeStart(JsonOps.INSTANCE, clientJson).result().orElseThrow();
         helper.assertFalse(encoded.getAsJsonObject().has("semantics"),
                 "Client display payload must never contain generation semantics");
+        helper.assertValueEqual(encoded.getAsJsonObject().get("poem").getAsString(), builtIn.poem(),
+                "Client display payload must carry page artwork metadata");
+        rejectDefinition(helper, "{\"schema_version\":2," + display
+                + ",\"semantics\":{\"role\":\"weather\",\"value\":\"normal\"},\"poem\":\"only two\"}", "poem");
         helper.succeed();
     }
 

src/main/java/net/dnorberg/rivencraft/item/PageItem.java

@@ -8,10 +8,10 @@ import net.dnorberg.rivencraft.writing.PageContent;
 import net.dnorberg.rivencraft.writing.SymbolCatalog;
 import net.dnorberg.rivencraft.writing.SymbolDisplayMetadata;
 import net.dnorberg.rivencraft.writing.SymbolReference;
+import net.dnorberg.rivencraft.writing.SymbolPoems;
 import net.minecraft.ChatFormatting;
 import net.minecraft.core.component.DataComponents;
 import net.minecraft.network.chat.Component;
-import net.minecraft.world.item.component.CustomModelData;
 import net.minecraft.world.item.Item;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.TooltipFlag;
@@ -42,7 +42,7 @@ public final class PageItem extends Item {
         page.set(ModDataComponents.PAGE_SYMBOL_DISPLAY.get(), new SymbolDisplayMetadata(
                 reference.id(), key, key + ".description",
                 net.minecraft.resources.ResourceLocation.fromNamespaceAndPath(Rivencraft.MOD_ID, path.split("/")[0]),
-                true));
+                true, SymbolPoems.builtIn(reference.id())));
         return page;
     }
 
@@ -118,7 +118,6 @@ public final class PageItem extends Item {
     private static ItemStack create(PageContent content) {
         ItemStack stack = new ItemStack(ModItems.PAGE.get());
         stack.set(ModDataComponents.PAGE_CONTENT.get(), content);
-        stack.set(DataComponents.CUSTOM_MODEL_DATA, new CustomModelData(modelIndex(content)));
         if (content.kind() == PageContent.Kind.SYMBOL) {
             stack.set(ModDataComponents.PAGE_SYMBOL_DISPLAY.get(),
                     SymbolCatalog.display(content.symbol().orElseThrow()));
@@ -134,20 +133,4 @@ public final class PageItem extends Item {
                 : Component.translatable("item.rivencraft.page.unresolved");
     }
 
-    private static int modelIndex(PageContent content) {
-        return switch (content.kind()) {
-            case BLANK -> 0;
-            case LINK_PANEL -> 1;
-            case UNRESOLVED_SYMBOL -> 2;
-            case SYMBOL -> switch (content.symbol().orElseThrow().id().toString()) {
-                case "rivencraft:terrain/standard" -> 100;
-                case "rivencraft:biome/native" -> 101;
-                case "rivencraft:lighting/normal" -> 102;
-                case "rivencraft:weather/normal" -> 103;
-                case "rivencraft:celestial/normal_time" -> 104;
-                case "rivencraft:feature/caves" -> 105;
-                default -> 3;
-            };
-        };
-    }
 }

src/main/java/net/dnorberg/rivencraft/writing/SymbolDefinition.java

@@ -15,18 +15,20 @@ public record SymbolDefinition(
         String nameTranslationKey,
         String descriptionTranslationKey,
         ResourceLocation category,
-        Optional<SymbolSemantics> semantics
+        Optional<SymbolSemantics> semantics,
+        String poem
 ) {
     public static final int CURRENT_SCHEMA_VERSION = 2;
     private static final Pattern TRANSLATION_KEY = Pattern.compile("[a-z0-9_.-]+");
     private static final Set<String> V2_FIELDS = Set.of(
-            "schema_version", "name", "description", "category", "semantics");
+            "schema_version", "name", "description", "category", "semantics", "poem");
 
     public SymbolDefinition {
         Objects.requireNonNull(nameTranslationKey, "nameTranslationKey");
         Objects.requireNonNull(descriptionTranslationKey, "descriptionTranslationKey");
         Objects.requireNonNull(category, "category");
         semantics = Objects.requireNonNull(semantics, "semantics");
+        poem = Objects.requireNonNull(poem, "poem");
         if (schemaVersion != 1 && schemaVersion != CURRENT_SCHEMA_VERSION) {
             throw new IllegalArgumentException("Unsupported schema_version " + schemaVersion);
         }
@@ -38,6 +40,10 @@ public record SymbolDefinition(
         }
         validateTranslationKey(nameTranslationKey, "name");
         validateTranslationKey(descriptionTranslationKey, "description");
+        if (!poem.isEmpty() && (poem.length() > 96
+                || !poem.matches("[A-Za-z]+(?: [A-Za-z]+){3}"))) {
+            throw new IllegalArgumentException("'poem' must contain exactly four alphabetic words");
+        }
     }
 
     /** v1 remains display-only; v2 has an exact field set and typed semantics. */
@@ -66,11 +72,12 @@ public record SymbolDefinition(
         Optional<SymbolSemantics> semantics = version == CURRENT_SCHEMA_VERSION
                 ? Optional.of(SymbolSemantics.parse(object.get("semantics")))
                 : Optional.empty();
-        return new SymbolDefinition(version, name, description, category, semantics);
+        String poem = object.has("poem") ? requiredString(object, "poem") : "";
+        return new SymbolDefinition(version, name, description, category, semantics, poem);
     }
 
     public SymbolDisplayMetadata display(ResourceLocation id) {
-        return new SymbolDisplayMetadata(id, nameTranslationKey, descriptionTranslationKey, category, true);
+        return new SymbolDisplayMetadata(id, nameTranslationKey, descriptionTranslationKey, category, true, poem);
     }
 
     static String requiredString(JsonObject object, String field) {

src/main/java/net/dnorberg/rivencraft/writing/SymbolDisplayMetadata.java

@@ -14,14 +14,16 @@ public record SymbolDisplayMetadata(
         String nameTranslationKey,
         String descriptionTranslationKey,
         ResourceLocation category,
-        boolean resolved
+        boolean resolved,
+        String poem
 ) {
     public static final Codec<SymbolDisplayMetadata> CODEC = RecordCodecBuilder.create(instance -> instance.group(
             ResourceLocation.CODEC.fieldOf("id").forGetter(SymbolDisplayMetadata::id),
             Codec.STRING.fieldOf("name").forGetter(SymbolDisplayMetadata::nameTranslationKey),
             Codec.STRING.fieldOf("description").forGetter(SymbolDisplayMetadata::descriptionTranslationKey),
             ResourceLocation.CODEC.fieldOf("category").forGetter(SymbolDisplayMetadata::category),
-            Codec.BOOL.fieldOf("resolved").forGetter(SymbolDisplayMetadata::resolved)
+            Codec.BOOL.fieldOf("resolved").forGetter(SymbolDisplayMetadata::resolved),
+            Codec.STRING.optionalFieldOf("poem", "").forGetter(SymbolDisplayMetadata::poem)
     ).apply(instance, SymbolDisplayMetadata::new));
     public static final StreamCodec<ByteBuf, SymbolDisplayMetadata> STREAM_CODEC = StreamCodec.composite(
             ResourceLocation.STREAM_CODEC, SymbolDisplayMetadata::id,
@@ -29,6 +31,7 @@ public record SymbolDisplayMetadata(
             ByteBufCodecs.STRING_UTF8, SymbolDisplayMetadata::descriptionTranslationKey,
             ResourceLocation.STREAM_CODEC, SymbolDisplayMetadata::category,
             ByteBufCodecs.BOOL, SymbolDisplayMetadata::resolved,
+            ByteBufCodecs.STRING_UTF8, SymbolDisplayMetadata::poem,
             SymbolDisplayMetadata::new
     );
 
@@ -38,7 +41,8 @@ public record SymbolDisplayMetadata(
                 "symbol.rivencraft.unresolved",
                 "symbol.rivencraft.unresolved.description",
                 ResourceLocation.fromNamespaceAndPath(Rivencraft.MOD_ID, "unresolved"),
-                false
+                false,
+                ""
         );
     }
 }

src/main/java/net/dnorberg/rivencraft/writing/SymbolNumerals.java

@@ -0,0 +1,30 @@
+package net.dnorberg.rivencraft.writing;
+
+/**
+ * Number components from Mystcraft Legacy's ModWords#constructNumber.
+ * Legacy registers 0–25; larger Rivencraft tab numbers use positional base 25.
+ */
+public final class SymbolNumerals {
+    private SymbolNumerals() {}
+
+    public static int[] digitsFor(int number) {
+        if (number < 0) throw new IllegalArgumentException("Numeral must be non-negative");
+        if (number < 25) return new int[] {number};
+        int count = 0;
+        for (int remaining = number; remaining > 0; remaining /= 25) count++;
+        int[] digits = new int[count];
+        for (int remaining = number, index = count - 1; index >= 0; index--, remaining /= 25)
+            digits[index] = remaining % 25;
+        return digits;
+    }
+
+    public static int[] componentsForDigit(int digit) {
+        if (digit < 0 || digit >= 25) throw new IllegalArgumentException("Numeral digit must be in [0, 24]");
+        if (digit == 0) return new int[] {1};
+        int fifths = digit / 5;
+        int remainder = digit % 5;
+        if (fifths == 0) return new int[] {55 + remainder};
+        if (remainder == 0) return new int[] {59 + fifths};
+        return new int[] {59 + fifths, 55 + remainder};
+    }
+}

src/main/java/net/dnorberg/rivencraft/writing/SymbolPoems.java

@@ -0,0 +1,21 @@
+package net.dnorberg.rivencraft.writing;
+
+import net.minecraft.resources.ResourceLocation;
+
+/** Legacy poems for existing starter pages, including stacks saved before poem metadata existed. */
+public final class SymbolPoems {
+    private SymbolPoems() {}
+
+    public static String builtIn(ResourceLocation id) {
+        if (!id.getNamespace().equals("rivencraft")) return "";
+        return switch (id.getPath()) {
+            case "terrain/standard" -> "Terrain Form Tradition Flow";
+            case "biome/native" -> "Constraint Nature Tradition Sustain";
+            case "lighting/normal" -> "Ethereal Dynamic Cycle Balance";
+            case "weather/normal" -> "Sustain Dynamic Tradition Balance";
+            case "celestial/normal_time" -> "Transform Time System Balance";
+            case "feature/caves" -> "Terrain Transform Void Flow";
+            default -> "";
+        };
+    }
+}

src/main/resources/assets/rivencraft/lang/en_us.json

@@ -42,6 +42,7 @@
   "screen.rivencraft.writing_desk.all_categories": "All categories",
   "screen.rivencraft.writing_desk.previous_tabs": "Previous four tabs (Page Up)",
   "screen.rivencraft.writing_desk.next_tabs": "Next four tabs (Page Down)",
+  "screen.rivencraft.writing_desk.tab_symbol": "Tab %s",
   "screen.rivencraft.writing_desk.no_symbols": "No available symbols",
   "item.rivencraft.ink_vial.remaining": "Ink: %s/%s",
   "item.rivencraft.ink_vial.usage": "Use with paper in the other hand to prepare a Link Panel.",

src/main/resources/assets/rivencraft/models/item/page.json

@@ -1,17 +1,13 @@
 {
-  "parent": "minecraft:item/generated",
-  "textures": {
-    "layer0": "rivencraft:item/page"
-  },
-  "overrides": [
-    { "predicate": { "custom_model_data": 1 }, "model": "rivencraft:item/page_link_panel" },
-    { "predicate": { "custom_model_data": 2 }, "model": "rivencraft:item/page_unresolved" },
-    { "predicate": { "custom_model_data": 3 }, "model": "rivencraft:item/page_symbol" },
-    { "predicate": { "custom_model_data": 100 }, "model": "rivencraft:item/page_symbol_terrain_standard" },
-    { "predicate": { "custom_model_data": 101 }, "model": "rivencraft:item/page_symbol_biome_native" },
-    { "predicate": { "custom_model_data": 102 }, "model": "rivencraft:item/page_symbol_lighting_normal" },
-    { "predicate": { "custom_model_data": 103 }, "model": "rivencraft:item/page_symbol_weather_normal" },
-    { "predicate": { "custom_model_data": 104 }, "model": "rivencraft:item/page_symbol_celestial_normal_time" },
-    { "predicate": { "custom_model_data": 105 }, "model": "rivencraft:item/page_symbol_feature_caves" }
-  ]
+  "parent": "builtin/entity",
+  "gui_light": "front",
+  "display": {
+    "ground": { "translation": [0, 2, 0], "scale": [0.5, 0.5, 0.5] },
+    "head": { "rotation": [0, 180, 0], "translation": [0, 13, 7] },
+    "thirdperson_righthand": { "translation": [0, 3, 1], "scale": [0.55, 0.55, 0.55] },
+    "thirdperson_lefthand": { "translation": [0, 3, 1], "scale": [0.55, 0.55, 0.55] },
+    "firstperson_righthand": { "rotation": [0, -90, 25], "translation": [1.13, 3.2, 1.13], "scale": [0.68, 0.68, 0.68] },
+    "firstperson_lefthand": { "rotation": [0, 90, -25], "translation": [1.13, 3.2, 1.13], "scale": [0.68, 0.68, 0.68] },
+    "fixed": { "rotation": [0, 180, 0] }
+  }
 }

src/main/resources/assets/rivencraft/models/item/page_symbol_biome_native.json

@@ -1,4 +0,0 @@
-{
-  "parent": "minecraft:item/generated",
-  "textures": { "layer0": "rivencraft:item/page_symbol_biome_native" }
-}

src/main/resources/assets/rivencraft/models/item/page_symbol_celestial_normal_time.json

@@ -1,4 +0,0 @@
-{
-  "parent": "minecraft:item/generated",
-  "textures": { "layer0": "rivencraft:item/page_symbol_celestial_normal_time" }
-}

src/main/resources/assets/rivencraft/models/item/page_symbol_feature_caves.json

@@ -1,4 +0,0 @@
-{
-  "parent": "minecraft:item/generated",
-  "textures": { "layer0": "rivencraft:item/page_symbol_feature_caves" }
-}

src/main/resources/assets/rivencraft/models/item/page_symbol_lighting_normal.json

@@ -1,4 +0,0 @@
-{
-  "parent": "minecraft:item/generated",
-  "textures": { "layer0": "rivencraft:item/page_symbol_lighting_normal" }
-}

src/main/resources/assets/rivencraft/models/item/page_symbol_terrain_standard.json

@@ -1,4 +0,0 @@
-{
-  "parent": "minecraft:item/generated",
-  "textures": { "layer0": "rivencraft:item/page_symbol_terrain_standard" }
-}

src/main/resources/assets/rivencraft/models/item/page_symbol_weather_normal.json

@@ -1,4 +0,0 @@
-{
-  "parent": "minecraft:item/generated",
-  "textures": { "layer0": "rivencraft:item/page_symbol_weather_normal" }
-}

src/main/resources/data/rivencraft/rivencraft/symbols/biome/native.json

@@ -3,5 +3,6 @@
   "name": "symbol.rivencraft.biome.native",
   "description": "symbol.rivencraft.biome.native.description",
   "category": "rivencraft:biome",
-  "semantics": { "role": "biome_controller", "value": "native" }
+  "semantics": { "role": "biome_controller", "value": "native" },
+  "poem": "Constraint Nature Tradition Sustain"
 }

src/main/resources/data/rivencraft/rivencraft/symbols/celestial/normal_time.json

@@ -3,5 +3,6 @@
   "name": "symbol.rivencraft.celestial.normal_time",
   "description": "symbol.rivencraft.celestial.normal_time.description",
   "category": "rivencraft:celestial",
-  "semantics": { "role": "celestial", "value": "normal_time" }
+  "semantics": { "role": "celestial", "value": "normal_time" },
+  "poem": "Transform Time System Balance"
 }

src/main/resources/data/rivencraft/rivencraft/symbols/feature/caves.json

@@ -3,5 +3,6 @@
   "name": "symbol.rivencraft.feature.caves",
   "description": "symbol.rivencraft.feature.caves.description",
   "category": "rivencraft:feature",
-  "semantics": { "role": "feature", "value": "rivencraft:caves" }
+  "semantics": { "role": "feature", "value": "rivencraft:caves" },
+  "poem": "Terrain Transform Void Flow"
 }

src/main/resources/data/rivencraft/rivencraft/symbols/lighting/normal.json

@@ -3,5 +3,6 @@
   "name": "symbol.rivencraft.lighting.normal",
   "description": "symbol.rivencraft.lighting.normal.description",
   "category": "rivencraft:lighting",
-  "semantics": { "role": "lighting", "value": "normal" }
+  "semantics": { "role": "lighting", "value": "normal" },
+  "poem": "Ethereal Dynamic Cycle Balance"
 }

src/main/resources/data/rivencraft/rivencraft/symbols/terrain/standard.json

@@ -3,5 +3,6 @@
   "name": "symbol.rivencraft.terrain.standard",
   "description": "symbol.rivencraft.terrain.standard.description",
   "category": "rivencraft:terrain",
-  "semantics": { "role": "terrain", "value": "rivencraft:standard" }
+  "semantics": { "role": "terrain", "value": "rivencraft:standard" },
+  "poem": "Terrain Form Tradition Flow"
 }

src/main/resources/data/rivencraft/rivencraft/symbols/weather/normal.json

@@ -3,5 +3,6 @@
   "name": "symbol.rivencraft.weather.normal",
   "description": "symbol.rivencraft.weather.normal.description",
   "category": "rivencraft:weather",
-  "semantics": { "role": "weather", "value": "normal" }
+  "semantics": { "role": "weather", "value": "normal" },
+  "poem": "Sustain Dynamic Tradition Balance"
 }