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

package emt.entity;

import cpw.mods.fml.common.registry.IThrowableEntity;
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.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 IThrowableEntity, IProjectile {
	private Block inTile;
	public Entity shootingEntity;
	
	private int xTile;
	private int yTile;
	private int zTile;
	private int meta;
	private boolean inGround = false;
	private int ticksInGround;
	private int ticksInAir;
	private float explosionStrength = 2f;

	public EntityLaser(World world) {
		super(world);

		this.renderDistanceWeight = 10.0D;
		this.setSize(0.5F, 0.5F);
	}

	public EntityLaser(World world, EntityLivingBase entity, float speed) {
		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.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, speed, 1.0F);
	}
	
	public void setExplosionStrengthModifier(float f) {
		explosionStrength = f;
	}

	@Override
	protected void entityInit() {
	}

	@Override
	public void setThrowableHeading(double x, double y, double z, float speed, float scale) {
		this.motionX = x * speed;
		this.motionY = y * speed;
		this.motionZ = z * speed;
		this.ticksInGround = 0;
	}

	@SideOnly(Side.CLIENT)
	public void setPositionAndRotation2(double x, double y, double z, float rotX, float rotY, int rotZ) {
		this.setPosition(x, y, z);
		this.setRotation(rotX, rotY);
	}

	@SideOnly(Side.CLIENT)
	@Override
	public void setVelocity(double velX, double velY, double velZ) {
		this.motionX = velX;
		this.motionY = velY;
		this.motionZ = velZ;

	}

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

		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.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;
		}

		if (this.inGround) {
			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 (block == this.inTile && k == this.meta) {
				++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 vec3 = Vec3.createVectorHelper(this.posX, this.posY, this.posZ);
			Vec3 vec3next = Vec3.createVectorHelper(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
			MovingObjectPosition movingobjectposition = this.worldObj.func_147447_a(vec3, vec3next, false, true, false);
			vec3 = Vec3.createVectorHelper(this.posX, this.posY, this.posZ);
			vec3next = Vec3.createVectorHelper(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);

			if (movingobjectposition != null) {
				vec3next = 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 down;

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

				if (entity1.canBeCollidedWith() && (entity1 != this.shootingEntity || this.ticksInAir >= 5)) {
					down = 0.3F;
					AxisAlignedBB axisalignedbb1 = entity1.boundingBox.expand((double) down, (double) down, (double) down);
					MovingObjectPosition movingobjectposition1 = axisalignedbb1.calculateIntercept(vec3next, vec3);

					if (movingobjectposition1 != null) {
						double d1 = vec3next.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.meta = 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;
			}


			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);
				}

			}
			this.setPosition(this.posX, this.posY, this.posZ);
		}
	}

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

	@Override
	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.getShort("inTile"));
		this.meta = nbt.getByte("inData") & 255;
		this.inGround = nbt.getBoolean("inGround");
		this.explosionStrength = nbt.getFloat("explosionStrength");
	}

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

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

	@Override
	public Entity getThrower() {
		return shootingEntity;
	}

	@Override
	public void setThrower(Entity entity) {
		shootingEntity = entity;
	}
}