[How To get a Handle / Pointer of a Variable?]

Does Vectorscript support the Datatype Pointer?

A correspondend pascal-example is given below.

Can?t the Datatype Handle work as a Pointer to memory? / to a variable?s location ?

 
program Pointers;

var
  i: integer;
  p: ^integer;

begin
  p := @i;
end.

[How to query XML ? (second Child of Element)]

i need to query point data that is stored in an XML - the xml will look similar to

test3.xml

 <?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<geo>
<cloud>
	<vector>
		<x>11</x>
		<y>22</y>
	</vector>
	<vector>
		<x>33</x>
		<y>44</y>
	</vector>
</cloud>
</geo> 

this is queried with the following script

PROCEDURE ReadXML;
{Reads data from an XML file, draw a locus}
CONST
kAppFolder = 1;
VAR
hXML		: LONGINT;
xmlFile	: STRING;
result	: INTEGER;
str1,str2: STRING;
BEGIN
UseDefaultFileErrorHandling(FALSE);
hXML:= InitXML;
IF hXML <> 0 THEN BEGIN
	{init xml-libary}
	xmlFile:= 'test3.xml';
	{load file into memory}
	result:= ReadXMLFile(hXML, kAppFolder, xmlFile);
	{ask file}
	result:= GetElementValue(hXML,'/geo/cloud/vector/x',str1);
	result:= GetElementValue(hXML,'/geo/cloud/vector/y',str2);
	{clear memory}
	result:= ReleaseXML(hXML);
	{draw locus}
	Locus(Str2Num(str1),Str2Num(str2));
END ELSE BEGIN
	{error}
	Message('Could not initialize XML reader.');
END;
END;
Run(ReadXML);

i?m using VW 10.5 the functions GetFirstChild(..) GetNextElement(..) are not defined -

HOW can I query the second vector of cloud/ or more generally the second child of an element?

IS there a special path-Syntax?

eg ( not working)

result:= GetElementValue(hXML,'/geo/cloud[2]/x',str2);

?

[Query Edge-Visibility of PolyLine / Polygon]

WORKAROUND:

Thanks to M. Braach - he told me the following work-around:

a opend polygon/line with fillpat 0 has no area...

FUNCTION IsPolyClosed(poly:HANDLE):BOOLEAN;
{ask wether a polyline / Polygon is opend - returns false - or closed - returns true }
VAR
	oldFillPat : LONGINT;
BEGIN
	oldFillPat := GetFPat(poly);
	SetFPat(poly,0);
	IF HArea(poly) = 0 THEN IsPolyClosed := FALSE ELSE IsPolyClosed := TRUE;
	SetFPat(poly,oldFillPat);
END;

[GetEvent() - update plug-in objects via script]

i?m using SetRField() to change Parameters of a plug-in-object. How can i provoke the plugin to update ? There must be a undocumentated way with a GetEvent() - Funciton ? see Vectorscript Plug-In Editor -> Object Properties, Script Execution, With Script-Specified Events.

How does GetEvent work?

Where can i find a Documentation?

Thanks

[Query Edge-Visibility of PolyLine / Polygon]

i 'm trying to query the Edge-Visibility of the Segments of a Polygon, and indicate it with green (visible) and red (invisible ) Locus. It seems GetVetexVisibility returns wrong results.

any idea to solve this problem ?

Using Vectorworks 10.5, mac os x 10.4.8

PROCEDURE PolyInfo;
{query all vertex-pts of a polygon and draw a point with color according to VertexVisibility - select a polygon / polyline first}
Var
	poly : HANDLE;
	n_vert : INTEGER;
	i:INTEGER;
	pt:VECTOR;
BEGIN
	{ get the handle to the selectet polygon}
	poly := FSActLayer;
	{ get the number of vertices in the path }
	n_vert:= GetVertNum(poly);
	FOR i:= 1 TO n_vert DO BEGIN
		{select color according to Verte}
		GetPolyPt(poly, i, pt.x,pt.y);
		IF GetVertexVisibility(poly,i) THEN PenFore(6) ELSE PenFore(7);
		Locus(pt.x,pt.y);
	END;
END;
Run(PolyInfo);

[CreatePullDownMenu How do i add choices]

i found out the following: the pulldownmenuitems are created wenn the dialog is called with

RunLayoutDialog(dialogId,drivedialog)

drivedialog is your procedure, getting called while the dialog is displayed to the user

Procedure drivedialog(item:Longint;data:Longint);

RunLayoutDialog will pass item to drivedialog

the first time drivedialog is called it will get the value SetupDialogC

- this function isn?t documented ;-{

within this call you can create the pulldownitems with InsertCoice()

a example is given here:

http://www.nemetschek.net/support/custom/vscript/example.php

have a look at

Align Selected Object

hope this will help, even if this discussion is quite old...

well google find?s this page first,

seems there aren?t so many modern-dialog programmers...

Tom

[GetEvent | prevent plug-in object update - how to ?]

kiwi - thanks for your reply. i know the workaround you mention. - i do it the same way at the moment, but i?m unsatisfied with this solution.

isn?t there a solution as i am searching ?

[selectable / copy pdf - reference]

the vectorscript - pdf documentation mustn?t be selected and copied. because it is predefined by nemetschek in this way - why ??

this is horrible.

you can?t copy and paste anything from the reference.

this is stupid because of all those script - examples.

[vectorscript - better debugger layout]

the vectorscript debugger might offer more usability:

layout:

it would be great if the script field and the variable field could be predefined as two different windows.

using two monitors it is horrible that the variabels are below the text field!

reseved word:

{$breakpoint} would be wonderful. insert a breakpoint at this location.

{$MessageLastUsedVariablesWait 4, 20} also nice: this will Message the last 4 variables that have been used and display them, then wait for 20 seconds.

will Do the same as:

code:

---

VAR

a,b,c,d : INTEGER;

BEGIN

a :=1;

b := 20;

c := 300;

d := 4000;

Message('a ', a , ' b ', b, ' c ', c, ' d ', d);

END;

[/code]

[better - 3D Rotate View Tool]

the VW 3D Rotate View Tool is horrible !!!

compared with alias it is missing any intuitive use.

/ rotate around click point

/ rotate with full openGL - rendering

[GetEvent | prevent plug-in object update - how to ?]

i?m developing a plug-in object at the moment.

i use a lot of parameters.

the problem:

how can i oppress / prevent the update of the object ?

in the object properties - window i can specify -> script execution -> script specified event.

the info says ... must first call GetEvent

i can?t find any documentation for the GetEvent - call, function or what it is.

the problem:

im using to parameters that are multiplied:

e.g i want to draw a grid using the parameter PNCOLUMN and PNROW (number of columns , number of rows)

PNCOLUMN = 10;

PNROW = 1000;

(now i draw 10000 polygons)

if i change

PNCOLUMN = 100;

PNROW = 100;

the object has also 10 000 polygons

but if i change PNCOLUMN first

vectorworks updates the object with 100 000 polygons, an my old computer gives me a coffee-break.

- even if i don?t need them ??

---> i dont?t want vectorworks to update my object.

i want a botton in the obj info palette, a menu-command or something like this

called maybe update_vectorscript_object();

how to do this ?

if there is a information or reference just post the link -- thanks

Many Thanks for your effort.

[ 04-14-2005, 12:00 PM: Message edited by: tom_shady ]