001    package net.minecraft.entity.ai;
002    
003    import net.minecraft.entity.EntityLiving;
004    import net.minecraft.util.MathHelper;
005    
006    public class EntityAILeapAtTarget extends EntityAIBase
007    {
008        /** The entity that is leaping. */
009        EntityLiving leaper;
010    
011        /** The entity that the leaper is leaping towards. */
012        EntityLiving leapTarget;
013    
014        /** The entity's motionY after leaping. */
015        float leapMotionY;
016    
017        public EntityAILeapAtTarget(EntityLiving par1EntityLiving, float par2)
018        {
019            this.leaper = par1EntityLiving;
020            this.leapMotionY = par2;
021            this.setMutexBits(5);
022        }
023    
024        /**
025         * Returns whether the EntityAIBase should begin execution.
026         */
027        public boolean shouldExecute()
028        {
029            this.leapTarget = this.leaper.getAttackTarget();
030    
031            if (this.leapTarget == null)
032            {
033                return false;
034            }
035            else
036            {
037                double var1 = this.leaper.getDistanceSqToEntity(this.leapTarget);
038                return var1 >= 4.0D && var1 <= 16.0D ? (!this.leaper.onGround ? false : this.leaper.getRNG().nextInt(5) == 0) : false;
039            }
040        }
041    
042        /**
043         * Returns whether an in-progress EntityAIBase should continue executing
044         */
045        public boolean continueExecuting()
046        {
047            return !this.leaper.onGround;
048        }
049    
050        /**
051         * Execute a one shot task or start executing a continuous task
052         */
053        public void startExecuting()
054        {
055            double var1 = this.leapTarget.posX - this.leaper.posX;
056            double var3 = this.leapTarget.posZ - this.leaper.posZ;
057            float var5 = MathHelper.sqrt_double(var1 * var1 + var3 * var3);
058            this.leaper.motionX += var1 / (double)var5 * 0.5D * 0.800000011920929D + this.leaper.motionX * 0.20000000298023224D;
059            this.leaper.motionZ += var3 / (double)var5 * 0.5D * 0.800000011920929D + this.leaper.motionZ * 0.20000000298023224D;
060            this.leaper.motionY = (double)this.leapMotionY;
061        }
062    }