BiomesOPlenty/common/biomesoplenty/entities/EntityPixie.java

package biomesoplenty.entities;

import biomesoplenty.BiomesOPlenty;
import biomesoplenty.api.Items;
import net.minecraft.block.material.Material;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.util.AxisAlignedBB;
import net.minecraft.util.MathHelper;
import net.minecraft.world.EnumSkyBlock;
import net.minecraft.world.World;

public class EntityPixie extends EntityFlyingCreature
{
    public int courseChangeCooldown;
    public double waypointX;
    public double waypointY;
    public double waypointZ;
    
    public EntityPixie(World world)
    {
        super(world); 
        this.setSize(1.0F, 1.0F);
    }
    
    @Override
    protected void updateEntityActionState()
    {
        double d0 = this.waypointX - this.posX;
        double d1 = this.waypointY - this.posY;
        double d2 = this.waypointZ - this.posZ;
        double d3 = d0 * d0 + d1 * d1 + d2 * d2;

        if (d3 < 1.0D || d3 > 3600.0D)
        {
            this.waypointX = this.posX + (double)((this.rand.nextFloat() * 4.0F - 2.0F) * 2.0F);
            this.waypointY = this.posY + (double)((this.rand.nextFloat() * 4.0F - 2.0F) * 2.0F);
            this.waypointZ = this.posZ + (double)((this.rand.nextFloat() * 4.0F - 2.0F) * 2.0F);
        }

        if (this.courseChangeCooldown-- <= 0)
        {
            this.courseChangeCooldown += this.rand.nextInt(2) + 2;
            d3 = (double)MathHelper.sqrt_double(d3);

            if (this.isCourseTraversable(this.waypointX, this.waypointY, this.waypointZ, d3))
            {
                this.motionX += d0 / d3 * 0.1D;
                this.motionY += d1 / d3 * 0.1D;
                this.motionZ += d2 / d3 * 0.1D;
            }
            else
            {
                this.waypointX = this.posX;
                this.waypointY = this.posY;
                this.waypointZ = this.posZ;
            }
        }
        
        this.renderYawOffset = this.rotationYaw = -((float)Math.atan2(this.motionX, this.motionZ)) * 180.0F / (float)Math.PI;
    }

    private boolean isCourseTraversable(double par1, double par3, double par5, double par7)
    {
        double d4 = (this.waypointX - this.posX) / par7;
        double d5 = (this.waypointY - this.posY) / par7;
        double d6 = (this.waypointZ - this.posZ) / par7;
        AxisAlignedBB axisalignedbb = this.boundingBox.copy();

        for (int i = 1; (double)i < par7; ++i)
        {
            axisalignedbb.offset(d4, d5, d6);
            
            if (!this.worldObj.getCollidingBoundingBoxes(this, axisalignedbb).isEmpty())
            {
                return false;
            }
        }

        return true;
    }
    
	@Override
	protected void dropFewItems(boolean par1, int par2)
	{
		int var3 = rand.nextInt(3) + rand.nextInt(1 + par2);

		for (int var4 = 0; var4 < var3; ++var4)
		{
			this.entityDropItem(new ItemStack(Items.miscItems.get(), 1, 11), 0.0F);
		}
	}
	
    @Override
    public void onEntityUpdate()
    {
    	super.onEntityUpdate();

    	for (int i = 0; i < 7; i++)
    	{
    		if (this.rand.nextInt(2) == 0)
    		{
    			BiomesOPlenty.proxy.spawnParticle("pixietrail", this.posX + (this.rand.nextDouble()) * (double)this.width, this.posY + this.rand.nextDouble() * (double)this.height - (double)this.yOffset, this.posZ + (this.rand.nextDouble()) * (double)this.width);
    		}
    	}
    }
    
    /**
     * Checks to make sure the light is not too bright where the mob is spawning
     */
    protected boolean isValidLightLevel()
    {
        int i = MathHelper.floor_double(this.posX);
        int j = MathHelper.floor_double(this.boundingBox.minY);
        int k = MathHelper.floor_double(this.posZ);

        if (this.worldObj.getSavedLightValue(EnumSkyBlock.Sky, i, j, k) > this.rand.nextInt(32))
        {
            return false;
        }
        else
        {
            int l = this.worldObj.getBlockLightValue(i, j, k);

            if (this.worldObj.isThundering())
            {
                int i1 = this.worldObj.skylightSubtracted;
                this.worldObj.skylightSubtracted = 10;
                l = this.worldObj.getBlockLightValue(i, j, k);
                this.worldObj.skylightSubtracted = i1;
            }

            return l <= this.rand.nextInt(8);
        }
    }
    
    /**
     * Checks if the entity's current position is a valid location to spawn this entity.
     */
    @Override
    public boolean getCanSpawnHere()
    {
        return this.isValidLightLevel() && super.getCanSpawnHere();
    }
    
    @Override
    protected String getLivingSound()
    {
        return "biomesoplenty:mob.pixie.say";
    }

    @Override
    protected String getHurtSound()
    {
        return "biomesoplenty:mob.pixie.hurt";
    }

    @Override
    protected String getDeathSound()
    {
        return "biomesoplenty:mob.pixie.hurt";
    }
}