#include <mxsPlugin.h>

Inheritance diagram for MSPluginModifier:

Public Member Functions
	MSPluginModifier ()
	MSPluginModifier (MSPluginClass *pc, BOOL loading)
	~MSPluginModifier ()
void	DeleteThis ()
HWND	AddRollupPage (HINSTANCE hInst, MCHAR dlgTemplate, DLGPROC dlgProc, MCHAR title, LPARAM param=0, DWORD flags=0, int category=ROLLUP_CAT_STANDARD)
void	DeleteRollupPage (HWND hRollup)
IRollupWindow *	GetRollupWindow ()
ReferenceTarget *	get_delegate ()
void	GetClassName (MSTR &s)
	Retrieves the name of the plugin class.
Class_ID	ClassID ()
	Retrieves a constant that uniquely identifies the plugin class.
SClass_ID	SuperClassID ()
	Retrieves a constant representing the type of the plugin.
void	FreeCaches ()
int	NumSubs ()
Animatable *	SubAnim (int i)
MSTR	SubAnimName (int i)
int	NumParamBlocks ()
IParamBlock2 *	GetParamBlock (int i)
IParamBlock2 *	GetParamBlockByID (BlockID id)
void *	GetInterface (ULONG id)
	Inherited from Animatable.
RefResult	NotifyRefChanged (Interval changeInt, RefTargetHandle hTarget, PartID &partID, RefMessage message)
int	NumRefs ()
	Returns the total number of references this ReferenceMaker can hold.
RefTargetHandle	GetReference (int i)
	Returns the 'i-th' reference.
void	RefDeleted ()
void	RefAdded (RefMakerHandle rm)
RefTargetHandle	Clone (RemapDir &remap)
	This method is used by 3ds Max to clone an object.
IOResult	Save (ISave *isave)
	Implemented by the System.
IOResult	Load (ILoad *iload)
	Implemented by the System.
void	NotifyTarget (int msg, RefMakerHandle rm)
MCHAR *	GetObjectName ()
void	BeginEditParams (IObjParam ip, ULONG flags, Animatable prev)
void	EndEditParams (IObjParam ip, ULONG flags, Animatable next)
int	HitTest (TimeValue t, INode inode, int type, int crossing, int flags, IPoint2 p, ViewExp *vpt)
	This method is called to determine if the specified screen point intersects the item.
int	Display (TimeValue t, INode inode, ViewExp vpt, int flags)
	This is called by the system to have the item display itself (perform a quick render in viewport, using the current TM).
void	GetWorldBoundBox (TimeValue t, INode inode, ViewExp vpt, Box3 &box)
	This method returns the world space bounding box for Objects (see below for the Sub-object gizmo or Modifiers gizmo version).
void	GetLocalBoundBox (TimeValue t, INode inode, ViewExp vpt, Box3 &box)
	This is the object space bounding box, the box in the object's local coordinates.
void	Snap (TimeValue t, INode inode, SnapInfo snap, IPoint2 p, ViewExp vpt)
	Checks the point passed for a snap and updates the SnapInfo structure.
CreateMouseCallBack *	GetCreateMouseCallBack ()
	This method allows the system to retrieve a callback object used in creating an object in the 3D viewports.
BOOL	HasUVW ()
	It is called to find out if the object is has UVW coordinates.
void	SetGenUVW (BOOL sw)
	This method is called to change the state of its Generate UVW boolean.
Interval	LocalValidity (TimeValue t)
	This method returns the validity interval of a modifier.
ChannelMask	ChannelsUsed ()
	These are channels that the modifier needs in order to perform its modification.
ChannelMask	ChannelsChanged ()
	These are the channels that the modifier actually modifies.
void	NotifyInputChanged (Interval changeInt, PartID partID, RefMessage message, ModContext *mc)
	This method is called when an item in the modifier stack before this modifier sends a REFMSG_CHANGE message via NotifyDependents().
void	ModifyObject (TimeValue t, ModContext &mc, ObjectState os, INode node)
	This is the method that actually modifies the input object.
BOOL	DependOnTopology (ModContext &mc)
	Modifiers that place a dependency on topology should return TRUE for this method.
Class_ID	InputType ()
	This is the type of object that the modifier knows how to modify.
IOResult	SaveLocalData (ISave isave, LocalModData ld)
	When a 3ds Max file is being saved, this method is called so that the modifier can save the localData structure that is hung off each ModContext.
IOResult	LoadLocalData (ILoad iload, LocalModData *pld)
	When a 3ds Max file is being loaded, this method is called so that the modifier can load the LocalModData structure that is hung off each ModContext.
Static Public Member Functions
static RefTargetHandle	create (MSPluginClass *pc, BOOL loading)
Public Attributes
IObjParam *	ip
Protected Member Functions
virtual void	SetReference (int i, RefTargetHandle rtarg)
	Stores a ReferenceTarget as its 'i-th' reference`.

Constructor & Destructor Documentation

MSPluginModifier ( ) [inline]

{ }

MSPluginModifier	(	MSPluginClass *	pc,
		BOOL	loading
	)

~MSPluginModifier ( ) [inline]

{ DeleteAllRefsFromMe(); }

Member Function Documentation

static RefTargetHandle create	(	MSPluginClass *	pc,
		BOOL	loading
	)		`[static]`

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void DeleteThis ( ) [inline]

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Reimplemented from MSPlugin.

Reimplemented in MSModifierXtnd.

{   MSPlugin::DeleteThis(); }

HWND AddRollupPage	(	HINSTANCE	hInst,
		MCHAR *	dlgTemplate,
		DLGPROC	dlgProc,
		MCHAR *	title,
		LPARAM	param = `0`,
		DWORD	flags = `0`,
		int	category = `ROLLUP_CAT_STANDARD`
	)		`[virtual]`

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Implements MSPlugin.

void DeleteRollupPage ( HWND hRollup ) [virtual]

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Implements MSPlugin.

IRollupWindow* GetRollupWindow ( ) [virtual]

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Implements MSPlugin.

ReferenceTarget* get_delegate ( ) [inline, virtual]

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Implements MSPlugin.

Reimplemented in MSModifierXtnd.

{ return NULL; }  // no delegate

void GetClassName ( MSTR & s ) [inline, virtual]

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Retrieves the name of the plugin class.

This name is usually used internally for debugging purposes. For Material plug-ins this method is used to put up the material "type" name in the Material Editor.

Parameters:

s	Reference to a string filled in with the name of the plugin class

Reimplemented from ReferenceTarget.

Reimplemented in MSModifierXtnd.

{ s = MSTR(pc->class_name->to_string()); }

Class_ID ClassID ( ) [inline, virtual]

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Retrieves a constant that uniquely identifies the plugin class.

This method must return the unique ID for the plugin class. If two ClassIDs conflict, the system will only load the first conflicting one it finds. A program (gencid.exe) is provided to generate unique class id values.

Returns:: A class id that uniquely identifies a plugin class

See also:: Class ClassID, List of Class IDs.

Reimplemented from Animatable.

Reimplemented in MSModifierXtnd.

{ return pc->class_id; }

SClass_ID SuperClassID ( ) [inline, virtual]

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Retrieves a constant representing the type of the plugin.

Returns:: A super class id that uniquely identifies the type (category) of the plugin. Note that several plugin classes can be of the same type, thus return the same super class id. Plugins are uniquely identified by their class ids. List of Super Class IDs.

See also:: SClass_ID

Reimplemented from Modifier.

Reimplemented in MSModifierXtnd.

{ return pc->sclass_id; }

void FreeCaches ( ) [inline, virtual]

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Remarks:: This is called to delete any item that can be rebuilt. For example, the procedural sphere object has a mesh that it caches. It could call Mesh::FreeAll() on the mesh from this method. This will free the vertex/face/uv arrays. If the sphere is ever evaluated again it can just rebuild the mesh. If an object (like a sphere) has modifiers applied to it, and those modifiers are not animated, then the result of the pipeline is cached in the node. So there is no reason for the sphere to also have a cache of its representation. Therefore when this method is called, the sphere can free the data of the mesh.

Default Implementation:: {}

Reimplemented from Animatable.

Reimplemented in MSModifierXtnd.

{ }

int NumSubs ( ) [inline, virtual]

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Remarks:: The system uses a virtual array mechanism to access the sub-anims of a plug-in. This method returns the total number of sub-anims maintained by the plug-in. If a plug-in is using a parameter block to manage its parameters it should just return 1 for all the parameters directed by the parameter block.

Returns:: The number of sub-anims used by the plug-in.

Default Implementation:: { return 0; }

Reimplemented from Animatable.

Reimplemented in MSModifierXtnd.

{ return pblocks.Count(); }

Animatable* SubAnim ( int i ) [inline, virtual]

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Remarks:: This method returns a pointer to the 'i-th' sub-anim. If a plug-in is using a parameter block to manage all its parameters it should just return a pointer to the parameter block itself from this method. This method may return NULL so developers need to check the return value before calling other sub anim methods (such as SubAnimName()).

Parameters:

i	This is the index of the sub-anim to return.

Default Implementation:: { return NULL };

Reimplemented from Animatable.

Reimplemented in MSModifierXtnd.

{ return pblocks[i]; }

MSTR SubAnimName ( int i ) [inline, virtual]

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Remarks:: This method returns the name of the 'i-th' sub-anim to appear in track view. The system has no idea what name to assign to the sub-anim (it only knows it by the virtual array index), so this method is called to retrieve the name to display. Developer need to make sure the 'i-th' SubAnim() is non-NULL or this method will fail.

Parameters:

i	The index of the parameter name to return

Returns:: The name of the 'i-th' parameter.

Reimplemented from Animatable.

Reimplemented in MSModifierXtnd.

{ return pblocks[i]->GetLocalName(); }

int NumParamBlocks ( ) [inline, virtual]

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Remarks:: This method is available in release 3.0 and later only.

This method returns the number of ParamBlock2s in this instance.

Default Implementation:: { return 0; }

Reimplemented from Animatable.

Reimplemented in MSModifierXtnd.

{ return pblocks.Count(); }

IParamBlock2* GetParamBlock ( int i ) [inline, virtual]

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Remarks:: This method return 'i-th' ParamBlock2 in this instance (or NULL if not available).

Parameters:

i	The zero based index of the ParamBlock2 to return.

Default Implementation:: { return NULL; }

Reimplemented from Animatable.

Reimplemented in MSModifierXtnd.

{ return pblocks[i]; }

IParamBlock2* GetParamBlockByID ( BlockID id ) [inline]

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Reimplemented from MSPlugin.

Reimplemented in MSModifierXtnd.

{ return MSPlugin::GetParamBlockByID(id); }

void* GetInterface ( ULONG id ) [inline, virtual]

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Inherited from Animatable.

Returns a pointer to the interface.

Parameters:

id	- The id of the interface.

Returns:: A Pointer to the Interface

Reimplemented from BaseObject.

Reimplemented in MSModifierXtnd.

{ if (id == I_MAXSCRIPTPLUGIN) return (MSPlugin*)this; else return Modifier::GetInterface(id); }

RefResult NotifyRefChanged	(	Interval	changeInt,
		RefTargetHandle	hTarget,
		PartID &	partID,
		RefMessage	message
	)		`[inline]`

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Reimplemented from MSPlugin.

                    { 
                        return ((MSPlugin*)this)->NotifyRefChanged(changeInt, hTarget, partID, message); 
                    }

int NumRefs ( ) [virtual]

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Returns the total number of references this ReferenceMaker can hold.

The plugin implements this method to indicate the total number of of references it can make. This includes all references whether they are NULL (inactive) or non-NULL (active) at the time when this method is called. A plugin can hold a variable number of references, thus the return value of this method is not to be cached and reused by client code.

Returns:: The total number of references this plugin can hold. The default implementation is return 0.

Reimplemented from ReferenceMaker.

Reimplemented in MSModifierXtnd.

RefTargetHandle GetReference ( int i ) [virtual]

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Returns the 'i-th' reference.

The plugin implements this method to return its 'i-th' reference. The plug-in simply keeps track of its references using an integer index for each one. This method is normally called by the system.

Parameters:

i	- The index of the reference to retrieve. Valid values are from 0 to NumRefs()-1.

Returns:: The reference handle of the 'i-th' reference. Note that different calls to this method with the same 'i' value can result in different reference handles being retrieved, as the plugin changes the scene objects it references as its 'i-th' reference.

Reimplemented from ReferenceMaker.

Reimplemented in MSModifierXtnd.

virtual void SetReference	(	int	i,
		RefTargetHandle	rtarg
	)		`[protected, virtual]`

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Stores a ReferenceTarget as its 'i-th' reference`.

The plugin implements this method to store the reference handle passed to it as its 'i-th' reference. In its implementation of this method, the plugin should simply assign the reference handle passed in as a parameter to the member variable that holds the 'i-th' reference. Other reference handling methods such as ReferenceMaker::DeleteReference(), or ReferenceMaker::ReplaceReference() should not be called from within this method. The plugin itself or other plugins should not call this method directly. The system will call this method when a new reference is created or an existing one is replaced by calling ReferenceMaker::ReplaceReference().

Parameters:

i	- The index of the reference to store. Valid values are from 0 to NumRefs()-1.
rtarg	- The reference handle to store.

Reimplemented from ReferenceMaker.

Reimplemented in MSModifierXtnd.

void RefDeleted ( ) [inline]

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Reimplemented from MSPlugin.

{ MSPlugin::RefDeleted(); }

void RefAdded ( RefMakerHandle rm ) [inline]

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Reimplemented from MSPlugin.

{ MSPlugin::RefAdded( rm); }

RefTargetHandle Clone ( RemapDir & remap ) [virtual]

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This method is used by 3ds Max to clone an object.

See also:

CloneRefHierarchy(), class RemapDir This method is called by 3ds Max to have the plugin clone itself. The plug-in's implementation of this method should copy both the data structure and all the data residing in the data structure of this reference target. The plugin should clone all its references as well. Also, the plug-in's implementation of this method must call BaseClone(). In order for classes derived from this class to clone cleanly, the Clone method should just create the new instance, and then call an implementation of BaseClone that clones the references and copies any other necessary data. For example:

            class MyDerivedPlugin
                : public MyBasePlugin
            {
                const int MY_REFERENCE = 1;

                ReferenceTarget* Clone(RemapDir& remap)
                {
                    ReferenceTarget* result = new MyDerivedPlugin();
                    BaseClone(this, result, remap);
                    return result;
                }

                void BaseClone(ReferenceTarget* from, ReferenceTarget* to, RemapDir& remap)
                {
                    if (!to || !from || from == to)
                        return;    
                    MyBasePlugin::BaseClone(from, to, remap);
                    to->ReplaceReference(MY_REFERENCE, remap->CloneRef(from->GetReference(MY_REFERENCE)));
                }
            };

This method should not be directly called by plug-ins. Instead, either RemapDir::CloneRef() or CloneRefHierachy() should be used to perform cloning. These methods ensure that the mapping from the original object to the clone is added to the RemapDir used for cloning, which may be used during backpatch operations

Note:: See the remarks in method BaseClone() below.

Parameters:

remap - A RemapDir instance used for remapping references during a Clone.

Returns:: A pointer to the cloned item.

Reimplemented from ReferenceTarget.

Reimplemented in MSModifierXtnd.

IOResult Save ( ISave * isave ) [inline, virtual]

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Implemented by the System.

This method handles saving the modifier name. This method should be called by the derived class BEFORE it saves any chunks. See the sample code below.

Parameters:

isave You may use this pointer to call methods of ISave to write data.

Returns:: One of the following values: IO_OK, IO_ERROR.

Sample Code:

    IOResult DispMod::Save(ISave *isave)
    {
    // First save the modifier name by calling the base class version.
        Modifier::Save(isave);
    // Then save this modifiers data.
        isave->BeginChunk(BMIO_CHUNK);
        bi.Save(isave);
        isave->EndChunk();
        return IO_OK;
    }

Reimplemented from Modifier.

{ MSPlugin::Save(isave); return Modifier::Save(isave); }

IOResult Load ( ILoad * iload ) [inline, virtual]

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Implemented by the System.

Parameters:

iload You may use this pointer to call methods of ILoad to read data.

Returns:: One of the following values: IO_OK, IO_ERROR.

Reimplemented from Modifier.

{ MSPlugin::Load(iload); return Modifier::Load(iload); }

void NotifyTarget	(	int	msg,
		RefMakerHandle	rm
	)		`[inline]`

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Reimplemented from MSPlugin.

{ MSPlugin::NotifyTarget(msg, rm); }  // LAM - 9/7/01 - ECO 624

MCHAR* GetObjectName ( ) [inline, virtual]

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Returns:: the name that will appear in the history browser (modifier stack).

Reimplemented from BaseObject.

Reimplemented in MSModifierXtnd.

{ return pc->class_name->to_string(); }

void BeginEditParams	(	IObjParam *	ip,
		ULONG	flags,
		Animatable *	prev
	)		`[virtual]`

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Remarks:: This method is called by the system when the user may edit the item's (object, modifier, controller, etc.) parameters.

Parameters:

ip	Interface pointer. The developer can use it to call methods such as AddRollupPage(). Note that this pointer is only valid between BeginEditParams() and EndEditParams(). It should not be used outside this interval.
flags	Describe which branch of the command panel or dialog the item is being edited in. The following are possible values: BEGIN_EDIT_CREATE Indicates an item is being edited in the create branch. BEGIN_EDIT_MOTION Indicates a controller is being edited in the motion branch. BEGIN_EDIT_HIERARCHY Indicates a controller is being edited in the Pivot subtask of the hierarchy branch. BEGIN_EDIT_IK Indicates a controller is being edited in the IK subtask of the hierarchy branch. BEGIN_EDIT_LINKINFO Indicates a controller is being edited in the Link Info subtask of the hierarchy branch.
prev	Pointer to an Animatable object. This parameter may be used in the motion and hierarchy branches of the command panel. This pointer allows a plug-in to look at the ClassID of the previous item that was being edited, and if it is the same as this item, to not replace the entire UI in the command panel, but simply update the values displayed in the UI fields. This prevents the UI from 'flickering' when the current item begins its edit. For example, if you are in the motion branch and are looking at an item's PRS controller values, and then select another item that is displayed with a PRS controller, the UI will not change - only the values displayed in the fields will change. If however you selected a target camera that has a lookat controller (not a PRS controller) the UI will change because a different set of parameters need to be displayed. Note that for items that are edited in the modifier branch this field can be ignored.

Reimplemented from Animatable.

Reimplemented in MSModifierXtnd.

void EndEditParams	(	IObjParam *	ip,
		ULONG	flags,
		Animatable *	next
	)		`[virtual]`

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Remarks:: This method is called when the user is finished editing an objects parameters. The system passes a flag into the EndEditParams() method to indicate if the rollup page should be removed. If this flag is TRUE, the plug-in must un-register the rollup page, and delete it from the panel.

Parameters:

ip	An interface pointer. The developer may use the interface pointer to call methods such as DeleteRollupPage().
flags	The following flag may be set: END_EDIT_REMOVEUI If TRUE, the item's user interface should be removed.
next	Animatable pointer. Can be used in the motion and hierarchy branches of the command panel. It allows a plug-in to look at the ClassID of the next item that was being edited, and if it is the same as this item, to not replace the entire UI in the command panel. Note that for items that are edited in the modifier branch this field can be ignored.

Reimplemented from Animatable.

Reimplemented in MSModifierXtnd.

int HitTest	(	TimeValue	t,
		INode *	inode,
		int	type,
		int	crossing,
		int	flags,
		IPoint2 *	p,
		ViewExp *	vpt
	)		`[inline, virtual]`

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This method is called to determine if the specified screen point intersects the item.

The method returns nonzero if the item was hit; otherwise 0.

Parameters:

t	The time to perform the hit test.
inode	A pointer to the node to test.
type	The type of hit testing to perform. See Scene and Node Hit Test Types. for details.
crossing	The state of the crossing setting. If TRUE crossing selection is on.
flags	The hit test flags. See Scene and Node Hit Testing Flags for details.
p	The screen point to test.
vpt	An interface pointer that may be used to call methods associated with the viewports.

Returns:: Nonzero if the item was hit; otherwise 0.

Reimplemented from BaseObject.

Reimplemented in MSModifierXtnd.

{ return 0; }

int Display	(	TimeValue	t,
		INode *	inode,
		ViewExp *	vpt,
		int	flags
	)		`[inline, virtual]`

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This is called by the system to have the item display itself (perform a quick render in viewport, using the current TM).

Note: For this method to be called the object's validity interval must be invalid at the specified time t. If the interval is valid, the system may not call this method since it thinks the display is already valid.

Parameters:

t	The time to display the object.
inode	The node to display.
vpt	An interface pointer that may be used to call methods associated with the viewports.
flags	See Display Flags.

Returns:: The return value is not currently used.

Reimplemented from BaseObject.

Reimplemented in MSModifierXtnd.

{ return 0; }

void GetWorldBoundBox	(	TimeValue	t,
		INode *	inode,
		ViewExp *	vp,
		Box3 &	box
	)		`[inline, virtual]`

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This method returns the world space bounding box for Objects (see below for the Sub-object gizmo or Modifiers gizmo version).

The bounding box returned by this method does not need to be precise. It should however be calculated rapidly. The object can handle this by transforming the 8 points of its local bounding box into world space and take the minimums and maximums of the result. Although this isn't necessarily the tightest bounding box of the objects points in world space, it is close enough.

Parameters:

t	The time to compute the bounding box.
inode	The node to calculate the bounding box for.
vp	An interface pointer that can be used to call methods associated with the viewports.
box	Contains the returned bounding box.

Reimplemented from BaseObject.

Reimplemented in MSModifierXtnd.

{ }

void GetLocalBoundBox	(	TimeValue	t,
		INode *	inode,
		ViewExp *	vp,
		Box3 &	box
	)		`[inline, virtual]`

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This is the object space bounding box, the box in the object's local coordinates.

The system expects that requesting the object space bounding box will be fast.

Parameters:

t	The time to retrieve the bounding box.
inode	The node to calculate the bounding box for.
vp	An interface pointer that may be used to call methods associated with the viewports.
box	Contains the returned bounding box.

Reimplemented from BaseObject.

Reimplemented in MSModifierXtnd.

{ }

void Snap	(	TimeValue	t,
		INode *	inode,
		SnapInfo *	snap,
		IPoint2 *	p,
		ViewExp *	vpt
	)		`[inline, virtual]`

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Checks the point passed for a snap and updates the SnapInfo structure.

Note:: Developers wanting to find snap points on an Editable Mesh object should see the method XmeshSnap::Snap() in /MAXSDK/SAMPLES/SNAPS/XMESH/XMESH.CPP.

Parameters:

t	The time to check.
inode	The node to check.
snap	The snap info structure to update.
p	The screen point to check.
vpt	An interface pointer that may be used to call methods associated with the viewports.

Reimplemented from BaseObject.

Reimplemented in MSModifierXtnd.

{ }

CreateMouseCallBack* GetCreateMouseCallBack ( ) [inline, virtual]

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This method allows the system to retrieve a callback object used in creating an object in the 3D viewports.

This method returns a pointer to an instance of a class derived from CreateMouseCallBack. This class has a method proc() which is where the programmer defines the user/mouse interaction during the object creation phase.

Returns:: A pointer to an instance of a class derived from CreateMouseCallBack.

Implements BaseObject.

Reimplemented in MSModifierXtnd.

{ return NULL; }

BOOL HasUVW ( ) [inline, virtual]

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It is called to find out if the object is has UVW coordinates.

This method returns TRUE if the object has UVW coordinates; otherwise FALSE. In 3ds Max 2.0 and later there is code in the renderer that will automatically turn on the UVW coordinates of the base object if UV's are missing (and needed). The base object has to implement two simple methods to make this work: HasUVW() and SetGenUVW(). Developers are encouraged to put these methods in their objects: it makes using the program easier for the user. If they are not implemented, it doesn't cause any real harm: it will just operate as before and put up the missing UVW's message. Here is how the procedural sphere implements these methods:

    BOOL SphereObject::GetGenUVW()
    {
        BOOL genUVs;
        Interval v;
        pblock->GetValue(PB_GENUVS, 0, genUVs, v);
        return genUVs;
    }
    
    void SphereObject::SetGenUVW(BOOL sw)
    {
        if (sw==GetGenUVW()) return;
        pblock->SetValue(PB_GENUVS,0, sw);
    }

Important Note: The pblock->SetValue() will cause a call to NotifyDependents(FOREVER, PART_TEXMAP, REFMSG_CHANGE), which will invalidate the UVW cache. It is essential that this call be made, so if the 'generate UVW' boolean is not handled by a parameter block, then NotifyDependents() needs to be called explicitly. Also Note: For "modifiable objects" that pass up the pipeline getting modified, such as TriObject, EditTriObject, etc., which cannot generate their own UVWs, but can carry them in their data structures, only this HasUVW() method needs to be implemented. For example, here is the implementation for TriObject: BOOL TriObject::HasUVW() { return mesh.tvFace?1:0; }

Reimplemented from BaseObject.

Reimplemented in MSModifierXtnd.

{ return 1; }

void SetGenUVW ( BOOL sw ) [inline, virtual]

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This method is called to change the state of its Generate UVW boolean.

If the state changes, the object must send a REFMSG_CHANGE up the pipeline by calling NotifyDependents(). This applies to map channel 1.

Parameters:

sw	The new state for the generate UVW flag.

Reimplemented from BaseObject.

Reimplemented in MSModifierXtnd.

{ }

Interval LocalValidity ( TimeValue t ) [virtual]

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This method returns the validity interval of a modifier.

It is simply the combination of the validity of all the modifier's parameters. It's used to determine when to cache in the pipeline, but is not directly responsible for determining when ModifyObject() is called. ModifyObject() is called when the pipeline needs to be evaluated either because someone sent a REFMSG_CHANGE message or the validity of the object does not include the current time.

If a modifier is not animated it's OK to simply return FOREVER from

this method. In the case where the modifier changes because a user changes a non-animated control in the user interface (for instance a check box), you can cause reevaluation by notifying your dependents of the change, i.e.:

    NotifyDependents(FOREVER, PART_ALL, REFMSG_CHANGE);

Parameters:

t	The time to calculate the Interval.

See also:: Advanced Topics on Intervals.

Reimplemented from Modifier.

Reimplemented in MSModifierXtnd.

ChannelMask ChannelsUsed ( ) [inline, virtual]

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These are channels that the modifier needs in order to perform its modification.

This should at least include the channels specified in ChannelsChanged() but may include more. Note that ChannelsUsed() is called many times but the channels returned should not change on the fly.

Returns:: The channels required. See objectChannels.

Sample Code:

    { return GEOM_CHANNEL|TOPO_CHANNEL; }

Implements Modifier.

Reimplemented in MSModifierXtnd.

{ return GEOM_CHANNEL; }   // pretend this thing mods geometry in order to get parameters eval'd

ChannelMask ChannelsChanged ( ) [inline, virtual]

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These are the channels that the modifier actually modifies.

Note that ChannelsChanged() is called many times but the channels returned should not change on the fly.

Returns:: The channels that are changed. See objectChannels

Implements Modifier.

Reimplemented in MSModifierXtnd.

{ return GEOM_CHANNEL; }

void NotifyInputChanged	(	Interval	changeInt,
		PartID	partID,
		RefMessage	message,
		ModContext *	mc
	)		`[inline, virtual]`

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This method is called when an item in the modifier stack before this modifier sends a REFMSG_CHANGE message via NotifyDependents().

Consider the following example: Assume the modifier stack contains a Sphere Object, then a Bend, then a Edit Mesh. The Edit Mesh modifier does not have a reference to the Bend or the Sphere because it does not officially depend on these items. However it does depend on them in a certain sense, because it modifies the data that these items produce. So, if they change it may affect the modifier. A modifier may build a cache based on its input object. The modifier needs a way to know when to discard this cache because the input object has changed. Whenever one of the items before this modifier in the stack sends out a REFMSG_CHANGE message via NotifyDependents() to indicate it has changed this method is called. The modifier may respond in a way appropriate to it, for example by discarding its cache of the input object. It is not legal, to issue a NotifyDependent()'s in the NotifyInputChanged() method of a modifier, without checking for reentrancy. Imagine, you have an instanced modifier applied to the same object in the stack. Sending a refmsg from the NotifyInputChanged method will casue an endles loop. Simply putting a guard in, that checks for reentrancy should get rid of the problem.

Parameters:

changeInt	This is the interval from the message. It is reserved for future use - now it will always be FOREVER.
partID	This is the partID from the message.
message	This is the message sent.
mc	The ModContext for the pipeline that changed. If a modifier is applied to multiple objects, then there are ModApps in each pipeline that it is applied to. These ModApps are pointing to the same modifier. Consider the following example: Say you apply a Bend modifier to a Sphere, a Cylinder and a Box object. There are three ModApps but only one Bend modifier. Then you go to the Sphere and adjust its Radius. This will cause NotifyInputChanged() to be called on the Bend because the Bend's input changed. However only one of its inputs changed - only the Sphere changed and not the Cylinder or the Box. Therefore NotifyInputChanged() will be called once, and the ModContext passed in will be for the Sphere's changed pipeline. It is possible that all three objects could change at the same time. If an instanced float controller was assigned to the radius, width, and height - one parameter for each object - then the controller was adjusted in the function curve editor, all three items would change. In this case NotifyInputChanged() would be called three times on the Bend. Once for each pipeline, once with each ModContext.

Reimplemented from Modifier.

Reimplemented in MSModifierXtnd.

{ Modifier::NotifyInputChanged(changeInt, partID, message, mc); }

void ModifyObject	(	TimeValue	t,
		ModContext &	mc,
		ObjectState *	os,
		INode *	node
	)		`[inline, virtual]`

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This is the method that actually modifies the input object.

This method is responsible for altering the object and then updating the validity interval of the object to reflect the validity of the modifier.

Parameters:

t	The time at which the modification is being done.
mc	A reference to the ModContext.
os	The object state flowing through the pipeline. This contains a pointer to the object to modify.
node	The node the modifier is applied to. This parameter is always NULL for Object Space Modifiers and non-NULL for World Space Modifiers (Space Warps). This is because a given WSM is only applied to a single node at a time whereas an OSM may be applied to several nodes. This may be used for example by particle system space warps to get the transformation matrix of the node at various times.

See also:: The topic on Modifiers in the Programmers Guide.

Implements Modifier.

Reimplemented in MSModifierXtnd.

{ os->obj->UpdateValidity(GEOM_CHAN_NUM, LocalValidity(t)); }

BOOL DependOnTopology ( ModContext & mc ) [inline, virtual]

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Modifiers that place a dependency on topology should return TRUE for this method.

An example would be a modifier that stores a selection set base on vertex indices. This modifier depends on the indices being intact for it to operate correctly.

Parameters:

mc	Reference to the ModContext.

Returns:: TRUE if the modifier depends on topology; otherwise FALSE.

Reimplemented from Modifier.

Reimplemented in MSModifierXtnd.

{ return Modifier::DependOnTopology(mc); }

Class_ID InputType ( ) [inline, virtual]

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This is the type of object that the modifier knows how to modify.

Simple modifiers that just modify points of an object can operate on generic 'Deformable' objects. Deformable objects are any type of object that has points. A modifier could also work on a particular type of object such as a TriObject or PatchObject.

Returns:: The Class_ID of the item. You can request any Class_ID for your input type. For example, Class_ID(OMNI_LIGHT_CLASS_ID, 0). See List of Class_IDs.

Implements Modifier.

Reimplemented in MSModifierXtnd.

{ return Class_ID(DEFORM_OBJ_CLASS_ID,0); }

IOResult SaveLocalData	(	ISave *	isave,
		LocalModData *	ld
	)		`[inline, virtual]`

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When a 3ds Max file is being saved, this method is called so that the modifier can save the localData structure that is hung off each ModContext.

If the modifier doesn't store any data in the ModContext it can ignore this method.

Parameters:

isave	You may use this pointer to call methods of ISave to write data.
ld	Pointer to the LocalModData for the modifier.

Returns:: One of the following values: IO_OK, IO_ERROR.

Reimplemented from Modifier.

Reimplemented in MSModifierXtnd.

{ return Modifier::SaveLocalData(isave, ld); }

IOResult LoadLocalData	(	ILoad *	iload,
		LocalModData **	pld
	)		`[inline, virtual]`

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When a 3ds Max file is being loaded, this method is called so that the modifier can load the LocalModData structure that is hung off each ModContext.

If the modifier doesn't store any data in the ModContext it can ignore this method.

Parameters:

iload	You may use this pointer to call methods of ILoad to read data.
pld	A pointer to a pointer in the ModContext. The modifier must set this pointer to point at a new LocalModData derived class.

Returns:: One of the following values: IO_OK, IO_ERROR.

Reimplemented from Modifier.

Reimplemented in MSModifierXtnd.

{ return Modifier::LoadLocalData(iload, pld); }

Member Data Documentation

IObjParam* ip

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MSPluginModifier Class Reference

Public Member Functions

Static Public Member Functions

Public Attributes

Protected Member Functions

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation