Lets the main menu use user-created panoramas.

src/main/java/markil3/panorama/EventBus.java

@@ -1,10 +1,18 @@
 package markil3.panorama;
 
 import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.screen.MainMenuScreen;
+import net.minecraft.client.renderer.RenderSkybox;
+import net.minecraft.client.renderer.RenderSkyboxCube;
+import net.minecraft.util.ResourceLocation;
+import net.minecraft.util.math.MathHelper;
 import net.minecraftforge.api.distmarker.Dist;
 import net.minecraftforge.client.event.EntityViewRenderEvent;
+import net.minecraftforge.client.event.GuiOpenEvent;
+import net.minecraftforge.client.event.GuiScreenEvent;
 import net.minecraftforge.client.event.RenderHandEvent;
 import net.minecraftforge.client.event.ScreenshotEvent;
+import net.minecraftforge.client.event.TextureStitchEvent;
 import net.minecraftforge.event.TickEvent;
 import net.minecraftforge.eventbus.api.SubscribeEvent;
 import net.minecraftforge.fml.common.Mod;
@@ -86,4 +94,26 @@ public class EventBus
             screenshotState++;
         }
     }
+    @SubscribeEvent
+    public static void onShowScreen(GuiScreenEvent.InitGuiEvent event)
+    {
+        if (event instanceof GuiScreenEvent.InitGuiEvent.Pre)
+        {
+            if (Main.numPanoramas > 0)
+            {
+                int panorama =
+                        MathHelper.floor(Math.random() * Main.numPanoramas);
+                MainMenuScreen screen;
+                if (event.getGui() instanceof MainMenuScreen)
+                {
+//                Main.loadPanoramas(Minecraft.getInstance());
+                    screen = (MainMenuScreen) event.getGui();
+                    screen.panorama =
+                            new RenderSkybox(new RenderSkyboxCube(new ResourceLocation(
+                                    "panorama:textures/gui/title/background/" + panorama + "/panorama")));
+                    System.out.printf("Displaying panorama %d\n", panorama);
+                }
+            }
+        }
+    }
 }

src/main/java/markil3/panorama/FileTexture.java

@@ -0,0 +1,48 @@
+package markil3.panorama;
+
+import net.minecraft.client.renderer.texture.NativeImage;
+import net.minecraft.client.renderer.texture.SimpleTexture;
+import net.minecraft.client.resources.data.TextureMetadataSection;
+import net.minecraft.resources.IResourceManager;
+import net.minecraft.util.ResourceLocation;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+
+public class FileTexture extends SimpleTexture
+{
+    private final File file;
+
+    public FileTexture(ResourceLocation p_i1275_1_, File file)
+    {
+        super(p_i1275_1_);
+        this.file = file;
+    }
+
+    @Override
+    protected TextureData getTextureData(IResourceManager p_215246_1_)
+    {
+        return getTextureData(p_215246_1_, this.file);
+    }
+
+    public static SimpleTexture.TextureData getTextureData(IResourceManager resourceManagerIn,
+                                                           File locationIn)
+    {
+        NativeImage image;
+        TextureMetadataSection meta;
+        try (FileInputStream stream = new FileInputStream(locationIn))
+        {
+            image =
+                    NativeImage.read(stream);
+            meta = null;
+
+            return new SimpleTexture.TextureData(null,
+                    image);
+        }
+        catch (IOException e)
+        {
+            return new SimpleTexture.TextureData(e);
+        }
+    }
+}

src/main/java/markil3/panorama/Main.java

@@ -8,8 +8,12 @@ import net.minecraft.block.Blocks;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.FogRenderer;
 import net.minecraft.client.renderer.texture.NativeImage;
+import net.minecraft.client.renderer.texture.TextureManager;
+import net.minecraft.util.ResourceLocation;
 import net.minecraft.util.ScreenShotHelper;
 import net.minecraft.util.Util;
+import net.minecraftforge.client.event.ModelBakeEvent;
+import net.minecraftforge.client.event.TextureStitchEvent;
 import net.minecraftforge.common.MinecraftForge;
 import net.minecraftforge.event.RegistryEvent;
 import net.minecraftforge.eventbus.api.SubscribeEvent;
@@ -37,6 +41,7 @@ public class Main
 {
     // Directly reference a log4j logger.
     private static final Logger LOGGER = LogManager.getLogger();
+    static int numPanoramas = 0;
 
     public Main()
     {
@@ -56,64 +61,70 @@ public class Main
         FMLJavaModLoadingContext.get()
                 .getModEventBus()
                 .addListener(this::doClientStuff);
+        FMLJavaModLoadingContext.get()
+                .getModEventBus()
+                .addListener(this::onStitch);
 
         // Register ourselves for server and other game events we are
         // interested in
         MinecraftForge.EVENT_BUS.register(this);
     }
 
+    public void onStitch(ModelBakeEvent event)
+    {
+        Main.loadPanoramas(Minecraft.getInstance());
+    }
+
+    static void loadPanoramas(Minecraft mc)
+    {
+        int i = 0;
+        int j;
+        TextureManager textureManager = mc.textureManager;
+        ResourceLocation loc;
+        File panoramas = new File(mc.gameDir, "panoramas");
+        if (panoramas.isDirectory())
+        {
+            for (File panorama : panoramas.listFiles())
+            {
+                if (panorama.isDirectory())
+                {
+                    for (j = 0; j < 6; j++)
+                    {
+                        loc = new ResourceLocation(
+                                "panorama:textures/gui/title/background/" + i + "/panorama_" + j + ".png");
+                        textureManager.loadTexture(loc,
+                                new FileTexture(loc,
+                                        new File(panorama,
+                                                "panorama_" + j + ".png")));
+                    }
+                    i++;
+                }
+            }
+        }
+        numPanoramas = i;
+    }
+
     private void setup(final FMLCommonSetupEvent event)
     {
-        // some preinit code
-        LOGGER.info("HELLO FROM PREINIT");
-        LOGGER.info("DIRT BLOCK >> {}", Blocks.DIRT.getRegistryName());
     }
 
     private void doClientStuff(final FMLClientSetupEvent event)
     {
-        // do something that can only be done on the client
-        LOGGER.info("Got game settings {}",
-                event.getMinecraftSupplier().get().gameSettings);
+//        loadPanoramas(event.getMinecraftSupplier().get());
     }
 
     private void enqueueIMC(final InterModEnqueueEvent event)
     {
-        // some example code to dispatch IMC to another mod
-        InterModComms.sendTo("examplemod", "helloworld", () -> {
-            LOGGER.info("Hello world from the MDK");
-            return "Hello world";
-        });
     }
 
     private void processIMC(final InterModProcessEvent event)
     {
-        // some example code to receive and process InterModComms from other
-        // mods
-        LOGGER.info("Got IMC {}", event.getIMCStream().
-                map(m -> m.getMessageSupplier().get()).
-                collect(Collectors.toList()));
     }
 
     // You can use SubscribeEvent and let the Event Bus discover methods to call
     @SubscribeEvent
     public void onServerStarting(FMLServerStartingEvent event)
     {
-        // do something when the server starts
-        LOGGER.info("HELLO from server starting");
-    }
-
-    // You can use EventBusSubscriber to automatically subscribe events on
-    // the contained class (this is subscribing to the MOD
-    // Event bus for receiving Registry Events)
-    @Mod.EventBusSubscriber(bus = Mod.EventBusSubscriber.Bus.MOD)
-    public static class RegistryEvents
-    {
-        @SubscribeEvent
-        public static void onBlocksRegistry(final RegistryEvent.Register<Block> blockRegistryEvent)
-        {
-            // register a new block here
-            LOGGER.info("HELLO from Register Block");
-        }
     }
 
     static void renderPanorama(Minecraft mc)
@@ -138,7 +149,8 @@ public class Main
 
     static void saveScreenshot(Minecraft mc, int panoramaNum, int panoramaSide)
     {
-        final SimpleDateFormat FORMATTER = new SimpleDateFormat("yyyy-MM-dd_HH.mm.ss");
+        final SimpleDateFormat FORMATTER =
+                new SimpleDateFormat("yyyy-MM-dd_HH.mm.ss");
         final int FRAMEBUFFER_WIDTH = mc.getMainWindow().getFramebufferWidth();
         final int FRAMEBUFFER_HEIGHT =
                 mc.getMainWindow().getFramebufferHeight();

src/main/resources/META-INF/accesstransformer.cfg

@@ -0,0 +1 @@
+public-f net.minecraft.client.gui.screen.MainMenuScreen field_209101_K #panorama