SnapCore Class Reference

#include <c4d_snapdata.h>

Detailed Description

The Snap Interface, must be allocated either with AutoAlloc, or Alloc() and freed after use with Free().

Private Member Functions
	SnapCore ()

Alloc/Free
static SnapCore *	Alloc (void)
static void	Free (SnapCore *&p)

Snap/Intersect
Bool	Init (BaseDocument *doc, BaseDraw *bd, AtomArray *exclude=nullptr)
Bool	Update (void)
Bool	Snap (const Vector &p, SnapResult &result, SNAPFLAGS flags=SNAPFLAGS::NONE)
Bool	Intersect (const Vector &p, const Vector &n, Bool plane, SnapResult &result, SNAPFLAGS flags=SNAPFLAGS::NONE)

Inferred
BaseObject *	AddInferred (BaseDocument *doc, const Matrix &mat, INFERREDGUIDETYPE type)
Bool	FlushInferred (void)

Miscellaneous
void	SetToolObject (BaseObject *op)
void	SetCustomExcludeList (maxon::BaseArray< SnapExclude > *snapExcludeList)

Constructor & Destructor Documentation

SnapCore()

SnapCore ( )

private

Member Function Documentation

Alloc()

static SnapCore* Alloc ( void  )

static

Allocates a snap core. Destroy the allocated snap core with Free(). Use AutoAlloc to automate the allocation and destruction based on scope.

Returns

The allocated snap core, or nullptr if the allocation failed.

Free()

static void Free ( SnapCore *&  p )

static

Destructs snap cores allocated with Alloc(). Use AutoAlloc to automate the allocation and destruction based on scope.

Parameters

[in]

p

The snap core to destruct. If the pointer is nullptr nothing happens. The pointer is assigned nullptr afterwards.

Init()

Bool Init	(	BaseDocument *	doc,
		BaseDraw *	bd,
		AtomArray *	exclude = nullptr
	)

Snap initialization routine.

Parameters

[in]	doc	The current document. The caller owns the pointed document.
[in]	bd	The BaseDraw to initialize. The caller owns the pointed BaseDraw.
[in]	exclude	An array of objects to exclude from being snapped to. The caller owns the pointed array.

Returns

True on success of initializing the snap.

Update()

Bool Update

(

void

)

Updates the snaps to use the current settings.

Returns

true if successful, otherwise false.

Snap()

Bool Snap	(	const Vector &	p,
		SnapResult &	result,
		SNAPFLAGS	flags = SNAPFLAGS::NONE
	)

Snap routine.

Parameters

[in]	p	The position to snap to in global space.
[out]	result	The position to snap to in global space.
[in]	flags	The flags to limit snapping on selection or to a specific type: SNAPFLAGS

Returns

true on success of finding a snap point, false if no point was found in range to snap to.

Intersect()

Bool Intersect	(	const Vector &	p,
		const Vector &	n,
		Bool	plane,
		SnapResult &	result,
		SNAPFLAGS	flags = SNAPFLAGS::NONE
	)

Snap intersection routine.

Parameters

[in]	p	The position to snap to in global space.
[in]	n	The normal of the guide being intersected with in global space.
[in]	plane	true if the intersection should be with a plane, false if with a ray/line.
[out]	result	The result of the successful intersection, user owns this.
[in]	flags	The flags to limit snapping on selection or to a specific type: SNAPFLAGS

Returns

true on success of finding an intersection, false if no intersection was found in range.

AddInferred()

BaseObject* AddInferred	(	BaseDocument *	doc,
		const Matrix &	mat,
		INFERREDGUIDETYPE	type
	)

Adds an inferred guide point, line or plane to the scene for snapping to.

Parameters

[in]	doc	The current document. The caller owns the pointed document.
[in]	mat	The matrix for the point (axis), line, or plane, z points along the line or as the normal for the plane.
[in]	type	The type of inferred guide to add: INFERREDGUIDETYPE

Returns

true on success of adding the guide, false for a memory error attempting to do so.

FlushInferred()

Bool FlushInferred

(

void

)

Flushes inferred system guides and inferred elements.

Note

Should be called at mouse release.

Returns

true if all inferred guides were removed, otherwise false.

SetToolObject()

void SetToolObject

(

BaseObject *

op

)

Sets the active object and pass it to snap system if is created from current tool.

Note

Important for tool guide.

Parameters

[in]

op

The new object created in the tool. The caller owns the pointed object.

SetCustomExcludeList()

void SetCustomExcludeList

(

maxon::BaseArray< SnapExclude > *

snapExcludeList

)

Passes to the snap a new exclusion list.

Note

Has to be done before a snap call and will stay valid just for the next snap session.
This is useful if different exclusion types are needed during the drag without reinitializing the class.

Parameters

[in]

snapExcludeList

A pointer to a maxon::BaseArray of exclusion data or nullptr to clear internal pointer. The caller owns the pointed array.