AREXX Returned Variables Aug 18 1992

Here's a new  section of Vapor Paint's AREXX support:
some AREXX commands create variables which are available to your AREXX 
macro programs. This is tremendously useful when called from a Pum macro.

 For example,
 GetRMNum  returns the number of rawmouse points available for reading.
 GetRMVal <x> gets an instance of those RM's in new variables:
     RM_Time
     RM_X
     RM_Y

There's even a pair of new Mouse Tools, "Shift-F1 F6" and "Shift-F1 F7"
which do nothing but leave raw mice unprocessed and calls the macro
"VRMTool".  This allows you to write a custom Mouse Tool in AREXX.

The function "String <heading>\<default>", which puts up a string requester
with the title <heading> and default value <default>, returns a value in
VRETURN.  If Cancel is chosen, VRETURN is set to CANCEL.

The function "YorN <heading>" puts up a yes-or-no requester and returns
YES or NO in VRETURN.

The next screen has a more comprehensive list of "RVI" functions.
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GETRMNUM      gets number of RM vertices into RM_NUM
GETRMVAL <n>  gets the nth RM vertice into 
    RM_Time,RM_X,RM_Y
GETVTNUM      gets number of vertices in current icon into VT_NUM
              if the current icon is a Vector (VT) or note vector (NV)
GETVTVAL <n>  gets the nth Vertice of current VT into
    VT_S,VT_X,VT_Y,VT_Z,VT_R,VT_M
PUTVTVAL <n>  puts the previous variables values into said Vector

STRING <head>\<def>  with a Heading of <head>,and default value <def>,
                     get a string or CANCEL,  into VRETURN
YORN   <head>        Get "YES" or "NO" into VRETURN.

There's a big function on the next page: GetInfo
A useful function to use in conjunction with GetInfo is
EYEPOS <icon code> <n> 
Which sets the current icon to then <n>th instance of <icon code>.
Those codes? VT VC CX MV RM NV MI VW LK IN AN SQ KF  CL PN
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GetInfo           Gets lots of info about the current icon:
    EYE: the current link number
    LK_L,LK_R,LK_P,LK_C: left,right,parent,child of current icon
    LK_T:two-letter abbreviation of the type of node:
         VT VC DS CX RF MV RM NT NV MI SX VW LK
         IN AR VZ AN NX AP SQ KF PX CL PN XX FI
    LK_I: the instance of that type (not useful yet)
    LK_ET,LK_EI instance and type of equivalence link
    LK_F: flags   LK_LABEL: label of this node
And if the type of this node is AN,SQ,VW,KF,CL,PN then you get the
values of the node decoded as well:
For Views:
   VW_T VW_X VW_Y VW_F VW_E VW_ANGLE VW_SCALE 
For Animations:
   AN_START AN_END AN_RENDER AN_WIDTH AN_HEIGHT AN_PIXW AN_PIXH 
   AN_RPRF AN_RPSF AN_BIAS AN_SLICES AN_FLAG AN_OPT AN_AA 
For Sequences: 
SQ_START SQ_FLAG SQ_NUM 
For  keyframes:
KF_T 
For Colors
CL_R CL_G CL_B CL_T 
For Pens:
PN_OPT PN_P1
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    Here is another set of goodies from the command GETDFLT 
which creates these variables and is roughly equivalent to
the PumTop command (numbers in parens can be used in PUMTOP):

 statistics: STAT_VTN  STAT_VCN  STAT_LKN  STAT_MIN
 flags: STAT_FL1 STAT_FL2 STAT_FL3 STAT_FL4 STAT_FL5 STAT_FL6

 The current Time: STAT_TIMEW(1)
 The Current Selected Tool modes(major/Minor): DFLT_MAM  DFLT_MIM
 Default Vertice:
       DFLT_X(2) DFLT_Y(3) DFLT_Z(4) DFLT_R(5) DFLT_M(6)
 Default Pen: DFLT_PN1(10)  DFLT_PN2(11)
 Default Color:
       DFLT_CLR(12) DFLT_CLG(13) DFLT_CLB(14) DFLT_CLT(15)
 Default Edge Color:
       DFLT_CLER(16) DFLT_CLEG(17) DFLT_CLEB(18) DFLT_CLET(19)
 Default number of KeyFrames: DFLT_KF
 Clamp Value: CLAMP(7)
 File Compression: COMPRS(9)
 Frames Per Second: FRAMES(8)
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    Here is yet another set of goodies from the command GETVSTRS 
which creates these variables and allows you to set up your own fave
default directories and filenames for VFiles:,VFrames: and even VHelp:.
But the big feature is to be able to preset the complicated callback
string for PI interfaces.

VFILEDIR   currently VFiles:
VFILENAME  currently unnamed.vee

VFRAMEDIR  currently VFrames:
VFRAMENAME currently unimportant.vee

VHELPDIR   currently VHelp:
VHELPNAME  currently !Home

RENDERSTR  currently impi:WraAud -f$.snd -n$ -j# -s15040 -h2000 -x0 -t4
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