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Removing Controller with MAXScript

Since there's no built-in MAXScript function to remove controller once you add it to a parameter, here's a function to do that for you. Big thanks to Larry Minton for revealing how to handle ParamBlock2 PB2Values.

fn removeController subAnim = if isKindOf subAnim ::SubAnim and isController subAnim.controller do
(
    local originalValue = subAnim.value
    local REFMSG_CONTROLREF_CHANGE = 0xFA

    if isKindOf subAnim.parent ParamBlock2 then
    (
        local iGlobal = (dotNetClass "Autodesk.Max.GlobalInterface").Instance
        local pBlockNET = iGlobal.Animatable.GetAnimByHandle (getHandleByAnim subAnim.parent)
        local pValNET = pBlockNET.GetPB2Value (pBlockNET.IndexToId (subAnim.index - 1)) 0

        pValNET.Flags = bit.or pValNET.Flags 0x40 -- set the flag on the PB2Value which controls if the parameter is animated - this effectively removes the controller
    )
    else
    (
        local ctrl = subAnim.controller
        local parent = subAnim.parent
        local index = for i = 1 to refs.getNumRefs parent where refs.getReference parent i == ctrl do exit with i

        refs.replaceReference parent index undefined
    )

    if classOf subAnim.value == classOf originalValue do subAnim.value = originalValue
    notifyDependents subAnim.parent msg:REFMSG_CONTROLREF_CHANGE
)
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KeyHydra WheelControl Customization

With the latest KeyHydra update comes the possibility to use scroll wheel in conjunction with modifier keys to control properties of primitives at creation time, as well as various editable/edit poly tool properties. There's a pretty straightforward UI configuration when you want to tweak the values and an .xml configuration file if you want to go beyond that and add your own presets.

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KeyHydra LazerCut

I am happy to share a tool that's nearing release now: LazerCut, part of the KeyHydra package (see also the polycount discussion). It provides an interactive boolean workflow inside 3ds max using the object manipulation tools everyone is used to, without ever having to go to the boolean subobjects and settings:



The cutters can be created in any view, perpective, orthogonal, camera etc. Depending on the current mode, they can be used to split the selected geometry, add to it, subtract from it or create independent objects. Since all the cutters (with the exception of multi-object subtractions) are created in a separate layer as children of the object operated on, you can easily select those relevant to the object with PgDn, or unhide them using unhide $.children.
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Undocumented MAXScript Features

Every now and then, I stumbled upon an undocumented command or optional keyword. Some of them were later added to the documentation, many of them are still undocumented. Some of those are listed in this article (I'm skipping a lot of stuff I don't find useful like the non-creatable MEditBkgnd texture map, creatable PFlow related classes etc).

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Vectors Primer

Understanding vectors is a crucial skill for any technical artist. In this article, we will look at the very basics, both as a refresher for those who already know the concepts and an introduction for the uninitiated.
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Goodbye Google Reader, Hello Yandex Feeds

It looks like I migrate my feeds every year or so. Before moving to a self-hosted solution once and for all I decided to give a try to one last service, Yandex.Subscriptions (or Яндекс Лента).

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Comparing float values

Dealing with floating point values in MAXScript is almost inevitable, as are the accuracy problems connected to that.

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