Expression tag evaluation

Helper

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 08/02/2003 at 13:37, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   8.012
Platform:
Language(s) :   C.O.F.F.E.E ;

---------
it seems that the "Execute" part of an expression tag is only evaluated when the object which it's attached to has it's parameters changed/is manipulated.

is there any way to have a small section of code that is constantly evaluated (i want to change a variable parameter within my expression tag when the currently active object in the document changes).

Helper

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 09/02/2003 at 02:02, xxxxxxxx wrote:

I can't reproduce the behaviour you describe. This test script seems to be executed also when I change parameters of another object or move the time slider, also when the active object changes:

    
    
    const var MYTAG_ID = 1011203;  
    var mytag_icon;
    
    
    
    
    class MyTag : ExpressionPluginTag  
    {  
    public:  
      MyTag();  
        
      GetID();  
      GetIcon();  
      Edit();  
      GetName();  
      Execute(doc, op);  
      GetHelpText();  
        
      MultipleAllowed();  
      DisplayAllowed();  
      UseMenu();  
    }
    
    
    
    
    MyTag::MyTag() { println("MyTag"); super(); }  
    MyTag::GetID() { println("GetID"); return MYTAG_ID; }  
    MyTag::Edit() { println("Edit"); return TRUE; }  
    MyTag::GetName() { println("GetName"); return "My Tag"; }  
    MyTag::Execute(doc, op) { println("Execute: ", time()); return TRUE; }  
    MyTag::GetHelpText() { println("GetHelpText"); return "My Tag"; }  
    MyTag::MultipleAllowed()   { println("MultipleAllowed"); return TRUE; }  
    MyTag::DisplayAllowed()    { println("DisplayAllowed"); return TRUE; }  
    MyTag::GetIcon() { println("GetIcon()"); return mytag_icon; }  
    MyTag::UseMenu() { println("UseMenu"); return TRUE; }
    
    
    
    
    main()  
    {  
      mytag_icon = new(BaseBitmap, PLUGINTAG_ICON_SIZE, PLUGINTAG_ICON_SIZE);  
      mytag_icon->SetPen(vector(0.2, 0.3, 0.7));  
      mytag_icon->DrawRect(0,0,PLUGINTAG_ICON_SIZE,PLUGINTAG_ICON_SIZE);  
      println("main");  
      Register(MyTag);  
    }

Unfortunately it's not possible to set the camera dependent flag, since it's in a custom datatype not accessible from C.O.F.F.E.E., so you won't get called when the camera is moved.