    001    package net.minecraft.entity.ai;
    002
    003    import net.minecraft.entity.EntityLiving;
    004    import net.minecraft.util.MathHelper;
    005
    006    public class EntityMoveHelper
    007    {
    008        /** The EntityLiving that is being moved */
    009        private EntityLiving entity;
    010        private double posX;
    011        private double posY;
    012        private double posZ;
    013
    014        /** The speed at which the entity should move */
    015        private float speed;
    016        private boolean field_75643_f = false;
    017
    018        public EntityMoveHelper(EntityLiving par1EntityLiving)
    019        {
    020            this.entity = par1EntityLiving;
    021            this.posX = par1EntityLiving.posX;
    022            this.posY = par1EntityLiving.posY;
    023            this.posZ = par1EntityLiving.posZ;
    024        }
    025
    026        public boolean func_75640_a()
    027        {
    028            return this.field_75643_f;
    029        }
    030
    031        public float getSpeed()
    032        {
    033            return this.speed;
    034        }
    035
    036        /**
    037         * Sets the speed and location to move to
    038         */
    039        public void setMoveTo(double par1, double par3, double par5, float par7)
    040        {
    041            this.posX = par1;
    042            this.posY = par3;
    043            this.posZ = par5;
    044            this.speed = par7;
    045            this.field_75643_f = true;
    046        }
    047
    048        public void onUpdateMoveHelper()
    049        {
    050            this.entity.setMoveForward(0.0F);
    051
    052            if (this.field_75643_f)
    053            {
    054                this.field_75643_f = false;
    055                int var1 = MathHelper.floor_double(this.entity.boundingBox.minY + 0.5D);
    056                double var2 = this.posX - this.entity.posX;
    057                double var4 = this.posZ - this.entity.posZ;
    058                double var6 = this.posY - (double)var1;
    059                double var8 = var2 * var2 + var6 * var6 + var4 * var4;
    060
    061                if (var8 >= 2.500000277905201E-7D)
    062                {
    063                    float var10 = (float)(Math.atan2(var4, var2) * 180.0D / Math.PI) - 90.0F;
    064                    this.entity.rotationYaw = this.func_75639_a(this.entity.rotationYaw, var10, 30.0F);
    065                    this.entity.setAIMoveSpeed(this.speed * this.entity.getSpeedModifier());
    066
    067                    if (var6 > 0.0D && var2 * var2 + var4 * var4 < 1.0D)
    068                    {
    069                        this.entity.getJumpHelper().setJumping();
    070                    }
    071                }
    072            }
    073        }
    074
    075        private float func_75639_a(float par1, float par2, float par3)
    076        {
    077            float var4 = MathHelper.wrapAngleTo180_float(par2 - par1);
    078
    079            if (var4 > par3)
    080            {
    081                var4 = par3;
    082            }
    083
    084            if (var4 < -par3)
    085            {
    086                var4 = -par3;
    087            }
    088
    089            return par1 + var4;
    090        }
    091    }