Electro-Magic-Tools/src/main/java/emt/entity/EntityLaser.java

package emt.entity;

import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;
import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.IProjectile;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.projectile.EntityArrow;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.AxisAlignedBB;
import net.minecraft.util.MathHelper;
import net.minecraft.util.MovingObjectPosition;
import net.minecraft.util.Vec3;
import net.minecraft.world.World;

import java.util.List;

public class EntityLaser extends Entity implements IProjectile {

	private int xTile = -1;
	private int yTile = -1;
	private int zTile = -1;
	private Block inTile;
	private int inData;
	private boolean inGround;

	public Entity shootingEntity;
	private int ticksInGround;
	private int ticksInAir;
	
	private float explosionStrength = 2f;

	public EntityLaser(World par1World) {
		super(par1World);
		this.renderDistanceWeight = 10.0D;
		this.setSize(0.5F, 0.5F);
	}

	public EntityLaser(World par1World, double par2, double par4, double par6) {
		super(par1World);
		this.renderDistanceWeight = 10.0D;
		this.setSize(0.5F, 0.5F);
		this.setPosition(par2, par4, par6);
		this.yOffset = 0.0F;
	}

	public EntityLaser(World world, EntityLivingBase entity, EntityLivingBase par3EntityLivingBase, float par4, float par5) {
		super(world);
		this.renderDistanceWeight = 10.0D;
		this.shootingEntity = entity;

		this.posY = entity.posY + (double) entity.getEyeHeight() - 0.10000000149011612D;
		double d0 = par3EntityLivingBase.posX - entity.posX;
		double d1 = par3EntityLivingBase.boundingBox.minY + (double) (par3EntityLivingBase.height / 3.0F) - this.posY;
		double d2 = par3EntityLivingBase.posZ - entity.posZ;
		double d3 = (double) MathHelper.sqrt_double(d0 * d0 + d2 * d2);

		if (d3 >= 1.0E-7D) {
			float f2 = (float) (Math.atan2(d2, d0) * 180.0D / Math.PI) - 90.0F;
			float f3 = (float) (-(Math.atan2(d1, d3) * 180.0D / Math.PI));
			double d4 = d0 / d3;
			double d5 = d2 / d3;
			this.setLocationAndAngles(entity.posX + d4, this.posY, entity.posZ + d5, f2, f3);
			this.yOffset = 0.0F;
			float f4 = (float) d3 * 0.2F;
			this.setThrowableHeading(d0, d1 + (double) f4, d2, par4, par5);
		}
	}

	public EntityLaser(World world, EntityLivingBase entity, float par3) {
		super(world);
		this.renderDistanceWeight = 10.0D;
		this.shootingEntity = entity;

		this.setSize(0.5F, 0.5F);
		this.setLocationAndAngles(entity.posX, entity.posY + (double) entity.getEyeHeight(), entity.posZ, entity.rotationYaw, entity.rotationPitch);
		this.posX -= (double) (MathHelper.cos(this.rotationYaw / 180.0F * (float) Math.PI) * 0.16F);
		this.posY -= 0.10000000149011612D;
		this.posZ -= (double) (MathHelper.sin(this.rotationYaw / 180.0F * (float) Math.PI) * 0.16F);
		this.setPosition(this.posX, this.posY, this.posZ);
		this.yOffset = 0.0F;
		this.motionX = (double) (-MathHelper.sin(this.rotationYaw / 180.0F * (float) Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float) Math.PI));
		this.motionZ = (double) (MathHelper.cos(this.rotationYaw / 180.0F * (float) Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float) Math.PI));
		this.motionY = (double) (-MathHelper.sin(this.rotationPitch / 180.0F * (float) Math.PI));
		this.setThrowableHeading(this.motionX, this.motionY, this.motionZ, par3 * 1.5F, 1.0F);
	}
	
	public void setExplosionStrengthModifier(float f)
	{
		explosionStrength = f;
	}

	protected void entityInit() {
	}

	public void setThrowableHeading(double par1, double par3, double par5, float par7, float par8) {
		float f2 = MathHelper.sqrt_double(par1 * par1 + par3 * par3 + par5 * par5);
		par1 /= (double) f2;
		par3 /= (double) f2;
		par5 /= (double) f2;
		par1 += this.rand.nextGaussian() * (double) (this.rand.nextBoolean() ? -1 : 1) * 0.007499999832361937D * (double) par8;
		par3 += this.rand.nextGaussian() * (double) (this.rand.nextBoolean() ? -1 : 1) * 0.007499999832361937D * (double) par8;
		par5 += this.rand.nextGaussian() * (double) (this.rand.nextBoolean() ? -1 : 1) * 0.007499999832361937D * (double) par8;
		par1 *= (double) par7;
		par3 *= (double) par7;
		par5 *= (double) par7;
		this.motionX = par1;
		this.motionY = par3;
		this.motionZ = par5;
		float f3 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
		this.prevRotationYaw = this.rotationYaw = (float) (Math.atan2(par1, par5) * 180.0D / Math.PI);
		this.prevRotationPitch = this.rotationPitch = (float) (Math.atan2(par3, (double) f3) * 180.0D / Math.PI);
		this.ticksInGround = 0;
	}

	@SideOnly(Side.CLIENT)
	public void setPositionAndRotation2(double par1, double par3, double par5, float par7, float par8, int par9) {
		this.setPosition(par1, par3, par5);
		this.setRotation(par7, par8);
	}

	@SideOnly(Side.CLIENT)
	public void setVelocity(double par1, double par3, double par5) {
		this.motionX = par1;
		this.motionY = par3;
		this.motionZ = par5;

		if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F) {
			float f = MathHelper.sqrt_double(par1 + par5);
			this.prevRotationYaw = this.rotationYaw = (float) (Math.atan2(par1, par5) / Math.PI);
			this.prevRotationPitch = this.rotationPitch = (float) (Math.atan2(par3, (double) f) / Math.PI);
			this.prevRotationPitch = this.rotationPitch;
			this.prevRotationYaw = this.rotationYaw;
			this.setLocationAndAngles(this.posX, this.posY, this.posZ, this.rotationYaw, this.rotationPitch);
			this.ticksInGround = 0;
		}
	}

	public void onUpdate() {
		super.onUpdate();

		if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F) {
			float f = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
			this.prevRotationYaw = this.rotationYaw = (float) (Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
			this.prevRotationPitch = this.rotationPitch = (float) (Math.atan2(this.motionY, (double) f) * 180.0D / Math.PI);
		}

		Block block = this.worldObj.getBlock(this.xTile, this.yTile, this.zTile);
		if (block.getMaterial() != Material.air) {
			block.setBlockBoundsBasedOnState(this.worldObj, this.xTile, this.yTile, this.zTile);
			AxisAlignedBB axisalignedbb = block.getCollisionBoundingBoxFromPool(this.worldObj, this.xTile, this.yTile, this.zTile);

			if (axisalignedbb != null && axisalignedbb.isVecInside(Vec3.createVectorHelper(this.posX, this.posY, this.posZ))) {
				this.inGround = true;
			}
		}
		Block i = this.worldObj.getBlock(this.xTile, this.yTile, this.zTile);

		i.setBlockBoundsBasedOnState(this.worldObj, this.xTile, this.yTile, this.zTile);
		AxisAlignedBB axisalignedbb = i.getCollisionBoundingBoxFromPool(this.worldObj, this.xTile, this.yTile, this.zTile);

		if (axisalignedbb != null && axisalignedbb.isVecInside(Vec3.createVectorHelper(this.posX, this.posY, this.posZ))) {
			this.inGround = true;
		}

		if (this.inGround) {
			Block j = this.worldObj.getBlock(this.xTile, this.yTile, this.zTile);
			int k = this.worldObj.getBlockMetadata(this.xTile, this.yTile, this.zTile);
			if (!this.worldObj.isRemote) {
				this.worldObj.createExplosion(this, (int) this.posX, (int) this.posY, (int) this.posZ, explosionStrength, true);
				this.setDead();
			}

			if (j == this.inTile && k == this.inData) {
				++this.ticksInGround;

				if (this.ticksInGround == 1200) {
					this.setDead();
				}
			}
			else {
				this.inGround = false;
				this.motionX *= (double) (this.rand.nextFloat() * 0.2F);
				this.motionY *= (double) (this.rand.nextFloat() * 0.2F);
				this.motionZ *= (double) (this.rand.nextFloat() * 0.2F);
				this.ticksInGround = 0;
				this.ticksInAir = 0;
			}
		}
		else {
			++this.ticksInAir;
			Vec3 vec31 = Vec3.createVectorHelper(this.posX, this.posY, this.posZ);
			Vec3 vec3 = Vec3.createVectorHelper(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
			MovingObjectPosition movingobjectposition = this.worldObj.func_147447_a(vec31, vec3, false, true, false);
			vec31 = Vec3.createVectorHelper(this.posX, this.posY, this.posZ);
			vec3 = Vec3.createVectorHelper(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);

			if (movingobjectposition != null) {
				vec3 = Vec3.createVectorHelper(movingobjectposition.hitVec.xCoord, movingobjectposition.hitVec.yCoord, movingobjectposition.hitVec.zCoord);
			}

			Entity entity = null;
			List list = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, this.boundingBox.addCoord(this.motionX, this.motionY, this.motionZ).expand(1.0D, 1.0D, 1.0D));
			double d0 = 0.0D;
			int l;
			float f1;

			for (l = 0; l < list.size(); ++l) {
				Entity entity1 = (Entity) list.get(l);

				if (entity1.canBeCollidedWith() && (entity1 != this.shootingEntity || this.ticksInAir >= 5)) {
					f1 = 0.3F;
					AxisAlignedBB axisalignedbb1 = entity1.boundingBox.expand((double) f1, (double) f1, (double) f1);
					MovingObjectPosition movingobjectposition1 = axisalignedbb1.calculateIntercept(vec3, vec31);

					if (movingobjectposition1 != null) {
						double d1 = vec3.distanceTo(movingobjectposition1.hitVec);

						if (d1 < d0 || d0 == 0.0D) {
							entity = entity1;
							d0 = d1;
						}
					}
				}
			}

			if (entity != null) {
				movingobjectposition = new MovingObjectPosition(entity);
			}

			if (movingobjectposition != null && movingobjectposition.entityHit != null && movingobjectposition.entityHit instanceof EntityPlayer) {
				EntityPlayer entityplayer = (EntityPlayer) movingobjectposition.entityHit;

				if (entityplayer.capabilities.disableDamage || this.shootingEntity instanceof EntityPlayer && !((EntityPlayer) this.shootingEntity).canAttackPlayer(entityplayer)) {
					movingobjectposition = null;
				}
			}

			float f2;
			float f3;

			if (movingobjectposition != null) {
				if (movingobjectposition.entityHit != null) {
					f2 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
					if (!this.worldObj.isRemote) {
						this.worldObj.createExplosion(this, (int) this.posX, (int) this.posY, (int) this.posZ, explosionStrength, true);
						this.setDead();
					}
				}
				else {
					this.xTile = movingobjectposition.blockX;
					this.yTile = movingobjectposition.blockY;
					this.zTile = movingobjectposition.blockZ;
					this.inTile = this.worldObj.getBlock(this.xTile, this.yTile, this.zTile);
					this.inData = this.worldObj.getBlockMetadata(this.xTile, this.yTile, this.zTile);
					this.motionX = movingobjectposition.hitVec.xCoord - this.posX;
					this.motionY = movingobjectposition.hitVec.yCoord - this.posY;
					this.motionZ = movingobjectposition.hitVec.zCoord - this.posZ;
					f2 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
					this.posX -= this.motionX / (double) f2 * 0.05000000074505806D;
					this.posY -= this.motionY / (double) f2 * 0.05000000074505806D;
					this.posZ -= this.motionZ / (double) f2 * 0.05000000074505806D;
					this.inGround = true;
				}
			}

			this.posX += this.motionX;
			this.posY += this.motionY;
			this.posZ += this.motionZ;
			f2 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
			this.rotationYaw = (float) (Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);

			for (this.rotationPitch = (float) (Math.atan2(this.motionY, (double) f2) * 180.0D / Math.PI); this.rotationPitch - this.prevRotationPitch < -180.0F; this.prevRotationPitch -= 360.0F);

			while (this.rotationPitch - this.prevRotationPitch >= 180.0F) {
				this.prevRotationPitch += 360.0F;
			}

			while (this.rotationYaw - this.prevRotationYaw < -180.0F) {
				this.prevRotationYaw -= 360.0F;
			}

			while (this.rotationYaw - this.prevRotationYaw >= 180.0F) {
				this.prevRotationYaw += 360.0F;
			}

			this.rotationPitch = this.prevRotationPitch + (this.rotationPitch - this.prevRotationPitch) * 0.2F;
			this.rotationYaw = this.prevRotationYaw + (this.rotationYaw - this.prevRotationYaw) * 0.2F;
			float f4 = 0.99F;
			f1 = 0.05F;

			if (this.isInWater()) {
				for (int j1 = 0; j1 < 4; ++j1) {
					f3 = 0.25F;
					this.worldObj.spawnParticle("bubble", this.posX - this.motionX * (double) f3, this.posY - this.motionY * (double) f3, this.posZ - this.motionZ * (double) f3, this.motionX, this.motionY, this.motionZ);
				}

				f4 = 0.8F;
			}

			this.motionX *= (double) f4;
			this.motionY *= (double) f4;
			this.motionZ *= (double) f4;
			this.motionY -= (double) f1;
			this.setPosition(this.posX, this.posY, this.posZ);
		}
	}

	public void writeEntityToNBT(NBTTagCompound nbt) {
		nbt.setShort("xTile", (short) this.xTile);
		nbt.setShort("yTile", (short) this.yTile);
		nbt.setShort("zTile", (short) this.zTile);
		nbt.setByte("inTile", (byte) Block.getIdFromBlock(this.inTile));
		nbt.setByte("inData", (byte) this.inData);
		nbt.setBoolean("inGround", this.inGround);
		nbt.setFloat("explosionStrength", this.explosionStrength);
	}

	public void readEntityFromNBT(NBTTagCompound nbt) {
		this.xTile = nbt.getShort("xTile");
		this.yTile = nbt.getShort("yTile");
		this.zTile = nbt.getShort("zTile");
		this.inTile = Block.getBlockById(nbt.getByte("inTile") & 255);
		this.inData = nbt.getByte("inData") & 255;
		this.inGround = nbt.getBoolean("inGround");
		this.explosionStrength = nbt.getFloat("explosionStrength");
	}

	public void onCollide(Entity par1Entity) {
		if (!this.worldObj.isRemote)
		{
			this.worldObj.createExplosion(this, this.posX, this.posY, this.posZ, explosionStrength, true);
		}
	}

	@SideOnly(Side.CLIENT)
	public float getShadowSize() {
		return 0.0F;
	}
}