//initial target vector calculation - do every tick, fix for proper targeting variables
double var11 = this.targetedEntity.posX - this.posX;
         double var13 = this.targetedEntity.boundingBox.minY + (double)(this.targetedEntity.height / 2.0F) - (this.posY + (double)(this.height / 2.0F));
         double var15 = this.targetedEntity.posZ - this.posZ;


//
double var14 = (double)MathHelper.sqrt_double(var11 * var11 + var13 * var13 + var15 * var15 );
      this.motionX = var11 / var14 * 0.1D;
      this.motionY = var13 / var14 * 0.1D;
      this.motionZ = var15 / var14 * 0.1D;