Towards starlight compat

- Steal Mods enum from Create.
 - Cursemaven dep for starlight

Co-authored-by: Aeiou <3160746+aeiouenigma@users.noreply.github.com>

build.gradle

@@ -92,6 +92,12 @@ mixin {
 }
 
 repositories {
+    maven {
+        url 'https://www.cursemaven.com'
+        content {
+            includeGroup "curse.maven"
+        }
+    }
     maven {
         name 'tterrag maven'
         url 'https://maven.tterrag.com/'
@@ -101,6 +107,8 @@ repositories {
 dependencies {
     minecraft "net.minecraftforge:forge:${minecraft_version}-${forge_version}"
 
+    compileOnly fg.deobf("curse.maven:starlight-526854:3559934")
+
     // https://discord.com/channels/313125603924639766/725850371834118214/910619168821354497
     // Prevent Mixin annotation processor from getting into IntelliJ's annotation processor settings
     // This allows 'Settings > Build, Execution, and Deployment > Build Tools > Gradle > Build and run using' set to IntelliJ to work correctly

src/main/java/com/jozufozu/flywheel/core/virtual/VirtualChunk.java

@@ -7,6 +7,10 @@ import java.util.stream.Stream;
 
 import javax.annotation.Nullable;
 
+import com.jozufozu.flywheel.util.Mods;
+
+import ca.spottedleaf.starlight.common.chunk.ExtendedChunk;
+import ca.spottedleaf.starlight.common.light.StarLightEngine;
 import it.unimi.dsi.fastutil.longs.LongSet;
 import it.unimi.dsi.fastutil.shorts.ShortList;
 import net.minecraft.core.BlockPos;
@@ -48,11 +52,17 @@ public class VirtualChunk extends ChunkAccess {
 		this.x = x;
 		this.z = z;
 
-		this.sections = new LevelChunkSection[16];
+		int sectionCount = world.getSectionsCount();
+		this.sections = new LevelChunkSection[sectionCount];
 
-		for (int i = 0; i < 16; i++) {
+		for (int i = 0; i < sectionCount; i++) {
 			sections[i] = new VirtualChunkSection(this, i << 4);
 		}
+
+		Mods.STARLIGHT.executeIfInstalled(() -> () -> {
+			((ExtendedChunk)this).setBlockNibbles(StarLightEngine.getFilledEmptyLight(this));
+			((ExtendedChunk)this).setSkyNibbles(StarLightEngine.getFilledEmptyLight(this));
+		});
 	}
 
 	@Override

src/main/java/com/jozufozu/flywheel/core/virtual/VirtualChunkSource.java

@@ -3,8 +3,6 @@ package com.jozufozu.flywheel.core.virtual;
 import java.util.HashMap;
 import java.util.function.BooleanSupplier;
 
-import javax.annotation.Nullable;
-
 import net.minecraft.world.level.BlockGetter;
 import net.minecraft.world.level.ChunkPos;
 import net.minecraft.world.level.Level;
@@ -22,7 +20,6 @@ public class VirtualChunkSource extends ChunkSource {
 		this.world = world;
 	}
 
-	@Nullable
 	@Override
 	public BlockGetter getChunkForLighting(int x, int z) {
 		return getChunk(x, z);
@@ -33,7 +30,6 @@ public class VirtualChunkSource extends ChunkSource {
 		return world;
 	}
 
-	@Nullable
 	@Override
 	public ChunkAccess getChunk(int x, int z, ChunkStatus status, boolean p_212849_4_) {
 		return getChunk(x, z);

src/main/java/com/jozufozu/flywheel/core/virtual/VirtualRenderWorld.java

@@ -29,7 +29,9 @@ import net.minecraft.world.level.block.Block;
 import net.minecraft.world.level.block.Blocks;
 import net.minecraft.world.level.block.entity.BlockEntity;
 import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.chunk.ChunkAccess;
 import net.minecraft.world.level.chunk.ChunkSource;
+import net.minecraft.world.level.chunk.LevelChunk;
 import net.minecraft.world.level.entity.LevelEntityGetter;
 import net.minecraft.world.level.gameevent.GameEvent;
 import net.minecraft.world.level.lighting.LevelLightEngine;
@@ -45,17 +47,24 @@ public class VirtualRenderWorld extends Level implements FlywheelWorld {
 	public final Set<SectionPos> spannedSections = new HashSet<>();
 	private final BlockPos.MutableBlockPos scratch = new BlockPos.MutableBlockPos();
 
-	public final LevelLightEngine lighter;
-	public final VirtualChunkSource chunkSource;
+	protected final Level level;
+	protected final LevelLightEngine lighter;
+	protected final VirtualChunkSource chunkSource;
+	protected final LevelEntityGetter<Entity> entityGetter = new VirtualLevelEntityGetter<>();
 
-	protected Level level;
-
-	protected LevelEntityGetter<Entity> entityGetter = new VirtualLevelEntityGetter<>();
+	protected final int height;
+	protected final int minBuildHeight;
 
 	public VirtualRenderWorld(Level level) {
+		this(level, level.getHeight(), level.getMinBuildHeight());
+	}
+
+	public VirtualRenderWorld(Level level, int height, int minBuildHeight) {
 		super((WritableLevelData) level.getLevelData(), level.dimension(), level.dimensionType(), level::getProfiler,
 				true, false, 0);
 		this.level = level;
+		this.height = height;
+		this.minBuildHeight = minBuildHeight;
 		this.chunkSource = new VirtualChunkSource(this);
 		this.lighter = new LevelLightEngine(chunkSource, true, false);
 	}
@@ -87,6 +96,16 @@ public class VirtualRenderWorld extends Level implements FlywheelWorld {
 
 	// MEANINGFUL OVERRIDES
 
+	@Override
+	public int getHeight() {
+		return height;
+	}
+
+	@Override
+	public int getMinBuildHeight() {
+		return minBuildHeight;
+	}
+
 	@Override
 	public ChunkSource getChunkSource() {
 		return chunkSource;
@@ -262,4 +281,60 @@ public class VirtualRenderWorld extends Level implements FlywheelWorld {
 	@Override
 	public void sendBlockUpdated(BlockPos pos, BlockState oldState, BlockState newState, int flags) {}
 
+	// Override Starlight's ExtendedWorld interface methods:
+
+	public LevelChunk getChunkAtImmediately(final int chunkX, final int chunkZ) {
+		return chunkSource.getChunk(chunkX, chunkZ, false);
+	}
+
+	public ChunkAccess getAnyChunkImmediately(final int chunkX, final int chunkZ) {
+		return chunkSource.getChunk(chunkX, chunkZ);
+	}
+
+	// Intentionally copied from LevelHeightAccessor. Lithium overrides these methods so we need to, too.
+
+	@Override
+	public int getMaxBuildHeight() {
+		return this.getMinBuildHeight() + this.getHeight();
+	}
+
+	@Override
+	public int getSectionsCount() {
+		return this.getMaxSection() - this.getMinSection();
+	}
+
+	@Override
+	public int getMinSection() {
+		return SectionPos.blockToSectionCoord(this.getMinBuildHeight());
+	}
+
+	@Override
+	public int getMaxSection() {
+		return SectionPos.blockToSectionCoord(this.getMaxBuildHeight() - 1) + 1;
+	}
+
+	@Override
+	public boolean isOutsideBuildHeight(BlockPos pos) {
+		return this.isOutsideBuildHeight(pos.getY());
+	}
+
+	@Override
+	public boolean isOutsideBuildHeight(int y) {
+		return y < this.getMinBuildHeight() || y >= this.getMaxBuildHeight();
+	}
+
+	@Override
+	public int getSectionIndex(int y) {
+		return this.getSectionIndexFromSectionY(SectionPos.blockToSectionCoord(y));
+	}
+
+	@Override
+	public int getSectionIndexFromSectionY(int sectionY) {
+		return sectionY - this.getMinSection();
+	}
+
+	@Override
+	public int getSectionYFromSectionIndex(int sectionIndex) {
+		return sectionIndex + this.getMinSection();
+	}
 }

src/main/java/com/jozufozu/flywheel/util/Mods.java

@@ -0,0 +1,47 @@
+package com.jozufozu.flywheel.util;
+
+import java.util.Optional;
+import java.util.function.Supplier;
+
+import net.minecraftforge.fml.ModList;
+
+/**
+ * For compatibility with and without another mod present, we have to define load conditions of the specific code
+ */
+public enum Mods {
+	STARLIGHT("starlight");
+
+	private final String id;
+
+	Mods(String id) {
+		this.id = id;
+	}
+
+	/**
+	 * @return a boolean of whether the mod is loaded or not based on mod id
+	 */
+	public boolean isLoaded() {
+		return ModList.get().isLoaded(id);
+	}
+
+	/**
+	 * Simple hook to run code if a mod is installed
+	 * @param toRun will be run only if the mod is loaded
+	 * @return Optional.empty() if the mod is not loaded, otherwise an Optional of the return value of the given supplier
+	 */
+	public <T> Optional<T> runIfInstalled(Supplier<Supplier<T>> toRun) {
+		if (isLoaded())
+			return Optional.of(toRun.get().get());
+		return Optional.empty();
+	}
+
+	/**
+	 * Simple hook to execute code if a mod is installed
+	 * @param toExecute will be executed only if the mod is loaded
+	 */
+	public void executeIfInstalled(Supplier<Runnable> toExecute) {
+		if (isLoaded()) {
+			toExecute.get().run();
+		}
+	}
+}