Validate value of property

By NiK684 · 2017-10-01

Description

Hello everyone.
My task is to find out valid integer range of some property. For example some material has an integer property and I need to know which values are valid for this property. The problem is that if I set invalid value (for example valid range is 0-2 and I set it to 3) then 3dsMax can even crash.

One man told me that I can get ParamBlockDesc2 from paramblock, with GetDesc(), then call GetParamDef, and it has max/min values. But it's for C++.

Can this be achieved in maxscript anyway?

Comments (5)

jahman · 2017-10-01

Sure. Google ParamDef Struct Reference (in c++ sdk reference) for more info on param checking



myMaterialName = "jah"

g = (dotNetClass "Autodesk.Max.GlobalInterface").instance
mtlName = dotNetObject "system.string" myMaterialName asdotnetobject:true
mtl = g.COREInterface7.FindMtlNameInScene mtlName

if mtl != undefined do (
	
	for i=0 to mtl.NumParamBlocks-1 do (
		
		pb = mtl.GetParamBlock i
		numParameters = pb.NumParams

		format "------- Paramblock % ---------\n" i
		for j=0 to numParameters-1 do (
			
			paramDef = pb.getParamDef j
			format "Parameter: %\nRange: min:%  max:%\n\n" paramDef.IntName paramDef.rangeLow.F paramDef.rangeHigh.F
			
		)

	)
	
)

NiK684 · 2017-10-01

Thanks a lot

NiK684 · 2017-10-02

One more question.
How to get classof ParamDef value? I need to know is it float or integer because then I need to get "paramDef.rangeLow.F" or "paramDef.rangeLow.I".
I know how to get class of maxscript value, but not dotnet value.

jahman · 2017-10-02

Do you know a way to determine if a paramdef is of spinner type? I tried without any luck.

Here's the SpinType enum.
You can simply use paramdef.SpinType == paramdef.SpinType.float to determine the type


show paramdef.SpinType
  .Float : <Autodesk.Max.EditSpinnerType>, read-only, static
  .Int : <Autodesk.Max.EditSpinnerType>, read-only, static
  .PosFloat : <Autodesk.Max.EditSpinnerType>, read-only, static
  .PosInt : <Autodesk.Max.EditSpinnerType>, read-only, static
  .PosUniverse : <Autodesk.Max.EditSpinnerType>, read-only, static
  .Time : <Autodesk.Max.EditSpinnerType>, read-only, static
  .Universe : <Autodesk.Max.EditSpinnerType>, read-only, static
  .value__ : <System.Int32>

NiK684 · 2017-10-02

Thx again :)