flexsim代码区起始部位代码解析

在触发器中常会看到顶端已经自动写好的一些代码,通常如下:　

1. treenode current = ownerobject(c);
   - E# K1 ]1 x- ^) X
2. treenode item = parnode(1);
   3 a! P% \' |/ k; L6 R
3. int port = parval(2);

复制代码

　
! D4 b0 [7 |% o$ D意思大概是声明了三个变量,current表示当前实体,item表示当前临时实体,port表示端口。
* L) g* d9 m  A2 _' W( F在接下来的代码中可以直接引用这三个已经声明好了的变量。
对于初学者来说，这段神奇的文字就像各种分布一样让人不解其意。
* p8 k* Q4 n, L+ u# ^1 {1 b下面是我自己的一点不成熟的理解，有些地方也不明白，可能理解有误的地方，请大家帮忙释疑、纠正、完善。
; i8 F* D1 e$ Y# t* k
treenode
Variable Types
$ N( x5 N, B( o+ {Flexsim uses just four variable types. Each of the four types can also be used in an array structure. The following explains each of these types.
! h- m- T( g% Y1 K( N0 sType Description
1 K, ]. [1 y% ]0 k0 Mint  integer type  
double  double precision floating point type  
string  text string  
treenode  reference to a Flexsim node or object  
. {8 B. l# E: B5 c; m5 q) `/ `flexsim中有4种类型的变量：int,double,string,treenode。treenode指的是flexsim中的一个节点或者一个实体。
1 C0 f- K9 w# U6 Z' ~# H) }, j4 T
current<no parentheses>
Description:  
" n" ]5 v, c" T( o7 F& FDeprecated. This should not be used as a special command with the setcurrent command anymore. Instead, declare a treenode variable type as current, then use current in your code as any other variable type.
& U" `0 I+ j" @% Y+ X不建议使用。current和setcurrent不应再被用作命令。如果需要设置某实体为当前实体，应先声明一个名为current的树节点型变量，然后在代码中引用该变量。
不解:
1.used...with....是什么意思?
以前current是必须和setcurrent一起使用的吗?

2.as any other variable type是什么意思?
前面说要声明一个名为current的树结点型变量,然后在代码中可以把current作为任意类型的变量使用?可以用为string型变量吗?
Example:

1. treenode current = rank(model(),3);
   
2. pt(getname(current));

复制代码

　
1 k0 y9 d; q- G9 g! pThis sets the object that is ranked 3 in the model to current and prints its name to the output console.  


/ P! y' V8 F1 Z; B* ?7 gownerobject(node thenode)
Description:
) X* u1 \2 n9 W* m, lThis command returns the node with object data attached to it that is the start of the sub-tree that thenode is in. In other words, it returns the object node that contains thenode.
/ r7 q5 x$ P5 C3 _* DThis command is used in most code fields and trigger fields to set the access variable current. In these fields, c references the node that contains the code, and ownerobject(c) references the object that "owns" that node.
该函数返回参数节点所在的实体。

Example:

1. string objname = getname(ownerobject(c));

复制代码

　
This sets objname to the name of the object that contains the node referenced by c. The c usually refers to the node where the code is being written.　　　

1. treenode current = ownerobject(c);

复制代码

　
This example is present in most code fields in Flexsim, and retrieves access to the "current" object.
这段代码出现在大多数flexsim代码的开头部位，指的是“当前”实体，就是代码所在实体。

c<no parentheses>
Description:  
This command is used to reference the active node during a function's execution.
If the function was called using nodefunction(), c returns a reference to the node on which the function is written.
If the function is an event function, c returns a reference to the object that contains the event.
" B- p* [/ Z* b6 a+ o: i5 ~" n( Ic在函数执行的过程中指向活动实体。
如果是节点型函数，c指向函数所在实体，
' m# _$ x# S  @5 y8 ?# C. {如果是事件型函数，c指向事件所在实体。
Example:　

1. treenode current = ownerobject(c);

复制代码

　
% C, y3 h9 ~$ |# E! E5 X# y
7 i+ t- z$ F5 S2 ~* K4 e& {7 |setcurrent(thing)
Description: Deprecated. Do not use.
Example: /
* V+ Z# [+ T' R' i此命令不再使用。
4 c6 L% ~: g4 V: X( S
- ~6 C1 w' I, o; ritem<no parentheses>
! c; P5 Q- ~) S: k  h# b# L& G9 I- lDescription:  
% l$ t8 h3 Y, e* TDeprecated. This should not be used as a special command with the setitem command anymore. Instead, declare a treenode variable type as item, then use item in your code as any other variable type.
不要再使用item和setitem命令了。如果需要指向某一临时实体，应该先声明一个名为item的树节点型变量，然后在代码中引用该变量。
: h5 y2 X: T* {9 l6 c' m2 jExample:　

1. treenode item = rank(model(),3);
   # a* u+ Q3 Q  P* w$ a
2. pt(getname(item));

复制代码

　
. p2 n, Q( q& cThis sets the object that is ranked 3 in the model to item and prints its name to the output console.  
& g0 J/ r5 C- p' e: }4 P6 h
! R: B/ M9 M5 i
6 r$ P: I6 b% A# U) Rsetitem(thing)
Description: Deprecated. Do not use.
Example: /
此命令不再使用。
" o" z0 q' o( y# p! U
parnode(num index)
+ O! T" V# C4 H% W. i7 ~" ~Description:  
This command is used inside a function that is called by the nodefunction() command.
此命令用在一个被nodefunction调用的函数中。"nodefunction() command"指的是什么?command和function有何不同?
# s3 R9 A( c7 q( N8 }( @& I1 RIt returns the parameter passed to nodefunction specified by index as a node (or treenode).
此命令返回一个节点(或树结点)参数.该参数由序号指定,并会传递给nodefunction.
- w+ S7 m0 G! V0 X: ~节点和树节点有何不同?
The first additional parameter passed to nodefunction() is parameter 1, the second is parameter 2, etc.
5 Q9 U1 \9 G+ Y3 O% n3 P6 hparnode,parval,parstr这三个命令真是让人搞不懂啊．．．
Parameters can also be retrieved using parval() and parstr() for casting them as numbers and strings respectively.
8 O' @3 E& ]+ N; O- m, [2 C( c5 nExample:
If a trigger/field is called with:
nodefunction(thefuncnode, item)
then within the trigger/field, getting access to the item passed as the first additional parameter would be done with:

1. treenode item = parnode(1);

复制代码

　　
7 A, ~$ Q5 b% t- K& k3 v
4 g+ w/ }* M# r& Rport<no parentheses>
Description:
Deprecated. This should not be used as a special command with the setport command anymore. Instead, declare an int variable type as port, then use port in your code as any other variable type.
$ r  y  ]6 K( G7 wExample:
) p' V; s" x, q4 V6 ?

1. int port = parval(3);
   
2. pd(port);

复制代码

　
This sets port to parval(3) and then prints the value to the output console.
# Q! y$ ~' N( x3 n
4 b. q, s% I( `; Y+ M. F不推荐使用。port和setport都不应再作为命令来使用。如果在代码中需要使用端口,需要声明一个名为port的整数型变量，然后在代码中直接使用port作为变量。

C 一扫疑惑，  但parval()，parnode() 还是有点不解

额，很值得一看

大神啊，解决了我多日的困惑

1# zorsite

; l- ]& {. b4 x0 b! S  [
首先谢谢加老师分享，我在这里也补充一下，对于加老师你讲到的”c“，我们一般都是在代码框和做GUI时会遇得多些，下面我具体讲一下他们的区别。
    首先在GUI中，它是这样的，如下图：
而在代码框中却是这样的，如下图：