LocalMinecraftInterface.java

package amidst.minecraft;

import java.lang.reflect.Field;

import amidst.logging.Log;
import amidst.version.VersionInfo;
import MoF.SaveLoader.Type;

public class LocalMinecraftInterface implements IMinecraftInterface {
	private Minecraft minecraft;
	/**
	 * A GenLayer instance, at quarter scale to the final biome layer
	 * (i.e. both axis are divided by 4).
	 * Minecraft calculates biomes at quarter-resolution, then noisily interpolates 
	 * the biome-map up to 1:1 resolution when needed, this is the biome GenLayer
	 * before it is interpolated.
	 */
	private MinecraftObject biomeGen;
	/**
	 * A GenLayer instance, the biome layer. (1:1 scale)
	 * Minecraft calculates biomes at quarter-resolution, then noisily interpolates 
	 * the biome-map up to 1:1 resolution when needed, this is the interpolated
	 * biome GenLayer.
	 */
	private MinecraftObject biomeGen_fullResolution;
	
	public LocalMinecraftInterface(Minecraft minecraft) {
		this.minecraft = minecraft;
	}
	
	@Override
	public int[] getBiomeData(int x, int y, int width, int height, boolean useQuarterResolutionMap) {
		minecraft.getClassByName("IntCache").callFunction("resetIntCache");
		return (int[])(useQuarterResolutionMap ? biomeGen : biomeGen_fullResolution).callFunction("getInts", x, y, width, height);
	}

	@Override
	public void createWorld(long seed, String typeName, String generatorOptions) {
		Log.debug("Attempting to create world with seed: " + seed + ", type: " + typeName + ", and the following generator options:");
		Log.debug(generatorOptions);
		
		// Minecraft 1.8 and higher require block initialization to be called before creating a biome generator.
		MinecraftClass blockInit;
		if ((blockInit = minecraft.getClassByName("BlockInit")) != null)
			blockInit.callFunction("initialize");
		
		Type type = Type.fromMixedCase(typeName);
		MinecraftClass genLayerClass = minecraft.getClassByName("GenLayer");
		MinecraftClass worldTypeClass = minecraft.getClassByName("WorldType");
		Object[] genLayers = null;
		if (worldTypeClass == null) {
			genLayers = (Object[])genLayerClass.callFunction("initializeAllBiomeGenerators", seed);
		} else {
			Object worldType = ((MinecraftObject) worldTypeClass.getValue(type.getValue())).get();
			if (genLayerClass.getMethod("initializeAllBiomeGeneratorsWithParams").exists()) {
				genLayers = (Object[])genLayerClass.callFunction("initializeAllBiomeGeneratorsWithParams", seed, worldType, generatorOptions);
			} else {
				genLayers = (Object[])genLayerClass.callFunction("initializeAllBiomeGenerators", seed, worldType);	
			}
				
		}

		biomeGen                = new MinecraftObject(genLayerClass, genLayers[0]);
		biomeGen_fullResolution = new MinecraftObject(genLayerClass, genLayers[1]);
	}

	@Override
	public VersionInfo getVersion() {
		return minecraft.version;
	}


}