I have an extension I am writing that has a fn that can accept multiple input types,float,color, etc… I am trying to find a way to detect what type of variable it is from the Value* in the arg_list. type_check won’t work since it throw an exception. I have tried using the tag variable but it doesn’t work for color. Any thoughts?
Classof?
classof "test"
String
classof 1
Integer
classof 1.0
Float
classof (color 255 255 255)
Color
classof [255,255,255]
Point3
classof [0,1]
Point2
classof [255,255,255,255]
Point4
yes… classof and superclassof is the two function used for this purpose
case classof value of
(
Integer : ...
Float : ....
Color: ...
default : ...
)
Thanks for the examples but I am talking about the sdk and c++ not maxscript, hence the Value* variable. Example I have a function that I am exposing to maxscript.
Value* foo_cf(Value** arg_list, int count){
Value* bar = arg_list[0];
//how do i determine what kind of data is in the Value bar? can’t use type_check() because
// it will throw an exception
if(bar->tag == class_tag(Float){//this one works
}
else if(bar->tag == class_tag(Color){//error since the Color class doesn't have a tag.
}
}
it has to be ColorValue instead of Color:
def_visible_primitive(checkValue, "checkValue");
Value* checkValue_cf(Value** arg_list, int count)
{
check_arg_count(checkValue, 1, count);
if (arg_list[0]->tag == class_tag(ColorValue)) mprintf("it's a color
");
else mprintf("it's not a color
");
return &ok;
}
That did the trick thanks, I thought had already tried that one but ColorValue was showing as undefined. Looks like I may have needed to include color.h. Thanks again.
It might be worthwhile to check out the Function Publishing mechanism in the SDK. This will take care of type checking and conversion from mxs to C++ and vice versa for you.