General.java

package com.cricketcraft.chisel.utils;

import java.util.Random;

import joptsimple.internal.Strings;
import net.minecraft.block.Block;
import net.minecraft.entity.Entity;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.EntityPlayerMP;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.MathHelper;
import net.minecraft.util.MovingObjectPosition;
import net.minecraft.util.Vec3;
import net.minecraft.world.World;

import com.cricketcraft.chisel.api.IAdvancedChisel;
import com.cricketcraft.chisel.api.carving.CarvingUtils;
import com.cricketcraft.chisel.api.carving.ICarvingVariation;
import com.cricketcraft.chisel.api.carving.IChiselMode;
import com.cricketcraft.chisel.carving.Carving;
import com.cricketcraft.chisel.item.chisel.ChiselMode;

public class General {

	public static Random rand = new Random();

	public static void propelTowards(Entity what, Entity whereTo, double force) {
		double dx = whereTo.posX - what.posX;
		double dy = whereTo.posY - what.posY;
		double dz = whereTo.posZ - what.posZ;
		double total = Math.sqrt(dx * dx + dy * dy + dz * dz);

		if (total == 0) {
			what.motionX = 0;
			what.motionY = 0;
			what.motionZ = 0;
		} else {
			what.motionX = dx / total * force;
			what.motionY = dy / total * force;
			what.motionZ = dz / total * force;
		}
	}

	public static boolean isInRange(double distance, double x1, double y1, double z1, double x2, double y2, double z2) {
		double x = x1 - x2;
		double y = y1 - y2;
		double z = z1 - z2;

		return x * x + y * y + z * z < distance * distance;
	}

	public static Item getItem(ItemStack stack) {
		if (stack == null)
			return null;
		if (stack.getItem() == null)
			return null;

		return stack.getItem();
	}

	public static String getName(Item item) {
		String res = item.getUnlocalizedName();
		return cleanTags(res);
	}

	public static String getName(Block block) {
		String res = block.getUnlocalizedName();
		return cleanTags(res);
	}

	public static String cleanTags(String tag) {
		return tag.replaceAll("[Cc]hisel\\p{Punct}", "").replaceFirst("^tile\\.", "").replaceFirst("^item\\.", "");
	}

	public static MovingObjectPosition getMovingObjectPositionFromPlayer(World par1World, EntityPlayer par2EntityPlayer, boolean par3) {
		float var4 = 1.0F;
		float var5 = par2EntityPlayer.prevRotationPitch + (par2EntityPlayer.rotationPitch - par2EntityPlayer.prevRotationPitch) * var4;
		float var6 = par2EntityPlayer.prevRotationYaw + (par2EntityPlayer.rotationYaw - par2EntityPlayer.prevRotationYaw) * var4;
		double var7 = par2EntityPlayer.prevPosX + (par2EntityPlayer.posX - par2EntityPlayer.prevPosX) * var4;
		double var9 = par2EntityPlayer.prevPosY + (par2EntityPlayer.posY - par2EntityPlayer.prevPosY) * var4 + 1.62D - par2EntityPlayer.yOffset;
		double var11 = par2EntityPlayer.prevPosZ + (par2EntityPlayer.posZ - par2EntityPlayer.prevPosZ) * var4;
		// TODO- 1.7.10 fix?
		Vec3 var13 = Vec3.createVectorHelper(var7, var9, var11);
		float var14 = MathHelper.cos(-var6 * 0.017453292F - (float) Math.PI);
		float var15 = MathHelper.sin(-var6 * 0.017453292F - (float) Math.PI);
		float var16 = -MathHelper.cos(-var5 * 0.017453292F);
		float var17 = MathHelper.sin(-var5 * 0.017453292F);
		float var18 = var15 * var16;
		float var20 = var14 * var16;
		double var21 = 5.0D;

		if (par2EntityPlayer instanceof EntityPlayerMP) {
			var21 = ((EntityPlayerMP) par2EntityPlayer).theItemInWorldManager.getBlockReachDistance();
		}

		Vec3 var23 = var13.addVector(var18 * var21, var17 * var21, var20 * var21);
		return par1World.rayTraceBlocks(var13, var23, par3);
	}

	public static ItemStack getChiselTarget(ItemStack chisel) {
		return chisel.hasTagCompound() ? ItemStack.loadItemStackFromNBT(chisel.stackTagCompound.getCompoundTag("chiselTarget")) : null;
	}

	public static final String[] sGNames = new String[] { "White", "Orange", "Magenta", "Light Blue", "Yellow", "Lime", "Pink", "Gray", "Light Gray", "Cyan", "Purple", "Blue", "Brown", "Green",
			"Red", "Black" };

	public static final String[] featureColors = new String[] { "white", "orange", "magenta", "lightblue", "yellow", "lime", "pink", "darkgray", "lightgray", "cyan", "purple", "blue", "brown",
			"green", "red", "black" };

	public static void setChiselTarget(ItemStack chisel, ItemStack target) {
		initTag(chisel);
		NBTTagCompound targetTag = new NBTTagCompound();
		if (target != null) {
			target.writeToNBT(targetTag);
		}
		chisel.getTagCompound().setTag("chiselTarget", targetTag);
	}

	private static void initTag(ItemStack stack) {
		if (!stack.hasTagCompound()) {
			stack.setTagCompound(new NBTTagCompound());
		}
	}

	private static final String MODE_KEY = "chiselMode";
	public static IChiselMode getChiselMode(ItemStack chisel) {
		if (chisel == null) {
			return ChiselMode.SINGLE;
		}
		
		if (chisel.stackTagCompound == null || Strings.isNullOrEmpty(chisel.stackTagCompound.getString(MODE_KEY))) {
			initTag(chisel);
			chisel.stackTagCompound.setString(MODE_KEY, ChiselMode.SINGLE.name());
		}
		
		String name = chisel.stackTagCompound.getString(MODE_KEY);
		if (chisel.getItem() instanceof IAdvancedChisel) {
			return ((IAdvancedChisel)chisel.getItem()).getMode(chisel, name);
		}

		return Enum.valueOf(ChiselMode.class, chisel.stackTagCompound.getString(MODE_KEY));
	}
	
	public static void setChiselMode(ItemStack chisel, IChiselMode mode) {
		initTag(chisel);
		chisel.stackTagCompound.setString(MODE_KEY, mode.name());
	}

	public static ICarvingVariation getVariation(ItemStack stack) {
		ICarvingVariation v = Carving.chisel.getVariation(Block.getBlockFromItem(stack.getItem()), stack.getItemDamage());
		return v == null ? CarvingUtils.getDefaultVariationFor(Block.getBlockFromItem(stack.getItem()), stack.getItemDamage(), 99) : v;
	}
}