EntityLaserBeam.java

package com.robotsquid.moltencraft.entity;

import net.minecraft.block.Block;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.projectile.EntityArrow;
import net.minecraft.util.*;
import net.minecraft.world.World;

import java.util.List;

public class EntityTempLaserBeam extends EntityArrow
{
    public Entity shootingEntity;

    public EntityTempLaserBeam(World world, EntityLivingBase player, float p_i1756_3_)
    {
        super(world, player, p_i1756_3_);
    }

    @Override
    public void onUpdate()
    {
        int field_145791_d = -1;
        int field_145792_e = -1;
        int field_145789_f = -1;

        this.onEntityUpdate();

        if (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);
        }

        Block block = this.worldObj.getBlock(field_145791_d, field_145792_e, field_145789_f);

        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 i;
        float f1;

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

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

                if (movingobjectposition1 != null)
                {
                    double d1 = vec31.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 f4;

        //Hits something
        if (movingobjectposition != null)
        {
            if (movingobjectposition.entityHit != null)
            {
                DamageSource damagesource = null;

                if (this.shootingEntity == null)
                {
                    damagesource = DamageSource.causeArrowDamage(this, this);
                }
                else
                {
                    damagesource = DamageSource.causeArrowDamage(this, this.shootingEntity);
                }

                movingobjectposition.entityHit.setFire(5);
                movingobjectposition.entityHit.attackEntityFrom(damagesource, 10.0F);

            }

            this.worldObj.createExplosion(this, this.posX, this.posY, this.posZ, 1.0F, true);
            this.setDead();
        }

        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);

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

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

        this.rotationYaw = this.prevRotationYaw + (this.rotationYaw - this.prevRotationYaw) * 0.2F;
        float f3 = 0.99F;
        f1 = 0.05F;

        this.motionX *= (double)f3;
        this.motionY *= (double)f3;
        this.motionZ *= (double)f3;
        this.setPosition(this.posX, this.posY, this.posZ);
        this.func_145775_I();
    }
}