#include <c4d_baseselect.h>

Inheritance diagram for BaseSelect:

Detailed Description

This class is used to keep track of point and polygon selections, it may also be used to track other types of element selections.

Note: Has to be created with Alloc() and destroyed with Free(). Use AutoAlloc to automate the allocation and destruction based on scope.

Private Member Functions
	BaseSelect ()

	~BaseSelect ()

Alloc/Free
static BaseSelect *	Alloc (void)

static void	Free (BaseSelect *&bs)

Selection/Segment Count
Int32	GetCount (void) const

Int32	GetSegments (void) const

Select/Deselect/Toggle
Bool	Select (Int32 num)

Bool	SelectAll (Int32 min, Int32 max, Bool deselectAll=true)

Bool	Deselect (Int32 num)

Bool	DeselectAll (void)

Bool	Toggle (Int32 num)

Bool	ToggleAll (Int32 min, Int32 max)

Get/Check Selection
Bool	GetRange (Int32 seg, Int32 maxElements, Int32 a, Int32 b) const

Bool	IsSelected (Int32 num) const

Copy/Clone
Bool	CopyTo (BaseSelect *dest) const

BaseSelect *	GetClone (void) const

Merge/Deselect/cross
Bool	Merge (const BaseSelect *src)

Bool	Deselect (const BaseSelect *src)

Bool	Cross (const BaseSelect *src)

Conversion from/to Array
Bool	FromArray (UChar *selection, Int32 count)

UChar *	ToArray (Int32 count) const

Bool	ToBitSet (Int32 count, maxon::BaseBitSet< maxon::DefaultAllocator > &bitSet) const

Read/Write
Bool	Read (HyperFile *hf)

void	Write (HyperFile *hf)

Miscellaneous
Bool	FindSegment (Int32 num, Int32 *segment) const

Int32	GetDirty () const

Int32	GetLastElement (void) const

Bool	IsAllSelected (Int32 num) const

Bool	IsNothingSelected () const

Private
BaseSelectData *	GetData ()

Bool	CopyFrom (BaseSelectData *ndata, Int32 ncnt)

Constructor & Destructor Documentation

◆ BaseSelect()

BaseSelect ( )

private

◆ ~BaseSelect()

~BaseSelect ( )

private

Member Function Documentation

◆ Alloc()

static BaseSelect* Alloc ( void )

static

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

Returns: The allocated base selection, or nullptr if the allocation failed.

◆ Free()

static void Free ( BaseSelect *& bs )

static

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

Parameters

[in,out] bs The base selection to destruct. If the pointer is nullptr nothing happens. The pointer is assigned nullptr afterwards.

◆ GetCount()

Int32 GetCount ( void ) const

Gets the number of selected elements.

Returns: The number of selected elements.

◆ GetSegments()

Int32 GetSegments ( void ) const

Gets the number of segments that contain elements.

Note: For example: with the selections 0..4, 6..7, 9..12, GetSegments() would return 3 and GetCount() would return 11.

Returns: The number of segments with selected elements.

◆ Select()

Bool Select ( Int32 num )

Selects an element.

Parameters

[in] num The element index to select.

Returns: true if the element was already selected, otherwise false.

◆ SelectAll()

Bool SelectAll	(	Int32	min,
		Int32	max,
		Bool	deselectAll = `true`
	)

Selects all elements in the given range.

Parameters

[in]	min	The first element to select.
[in]	max	The last element in the range to select.
[in]	deselectAll	Since R17. Deselects all previously selected elements before creating the new selection (equivalent to SELECTION_NEW).

Returns: Success of selecting the elements.

◆ Deselect() [1/2]

Bool Deselect ( Int32 num )

Deselects an element.

Parameters

[in] num The element index to deselect.

Returns: true if the element was already deselected, otherwise false.

◆ DeselectAll()

Bool DeselectAll ( void )

Deselects all elements.

Returns: Success of deselecting all elements.

◆ Toggle()

Bool Toggle ( Int32 num )

Toggles the selection state of an element.

Parameters

[in] num The element index to toggle.

Returns: Success of changing the selection state of the element.

◆ ToggleAll()

Bool ToggleAll	(	Int32	min,
		Int32	max
	)

Toggles the selection state of all elements in the given range.

Parameters

[in]	min	The first element to toggle.
[in]	max	The last element to toggle in the range.

Returns: Success of changing the selection state.

◆ GetRange()

Bool GetRange	(	Int32	seg,
		Int32	maxElements,
		Int32 *	a,
		Int32 *	b
	)		const

Gets the selected elements contained in a segment.

Parameters

[in]	seg	The segment to get the elements for. 0 <= seg < GetSegments()
[in]	maxElements	The maximum value for a and b. Makes sure a and b are < maxElements. Pass LIMIT<Int32>::MAX for no additional checks.
[out]	a	Assigned the index of the first selected element.
[out]	b	Assigned the index of the last selected element.

Returns: true if if the range was successfully retrieved, otherwise false. Only false if seg is not 0 <= seg < GetSegments()
The spans are always sorted (spans with higher index have higher numbers for a/b), also b is always >= a.

◆ IsSelected()

Bool IsSelected ( Int32 num ) const

Checks the selection state of an element.
To efficiently go through selections use the following code:

Int32 seg = 0, a, b, i;
while (bs->GetRange(seg++, LIMIT<Int32>::MAX, &a, &b))
{
  for (i=a; i<=b; ++i)
  {
    // Do something. 'i' is the selected element
  }
}

This is faster than:

for (i=0; i<maxelements; i++)
{
  if (bs->IsSelected(i))
  {
    // Do something
  }
}

Parameters

[in] num The element index to get the state for.

Returns: true if the element num is selected, otherwise false.

◆ CopyTo()

Bool CopyTo ( BaseSelect * dest ) const

Copies the selection elements to another BaseSelect.

Parameters

[out] dest The destination selection. The caller owns the pointed selection.

Returns: true if selection elements were copied successfully, otherwise false.

◆ GetClone()

BaseSelect* GetClone ( void ) const

Makes a duplicate of the selection with its elements.

Returns: The cloned BaseSelect or nullptr if failed. The caller owns the pointed BaseSelect.

◆ Merge()

Bool Merge ( const BaseSelect * src )

Selects all elements that are in src.

Parameters

[in] src The source selection. The caller owns the pointed selection.

Returns: true if the selection elements were merged successfully, otherwise false.

◆ Deselect() [2/2]

Bool Deselect ( const BaseSelect * src )

Deselects all elements that are in src.

Parameters

[in] src The source selection. The caller owns the pointed selection.

Returns: true if the selection elements were deselected successfully, otherwise false.

◆ Cross()

Bool Cross ( const BaseSelect * src )

Intersects all elements in src.

Parameters

[in] src The source selection. The caller owns the pointed selection.

Returns: true if the selection elements were crossed successfully, otherwise false.

◆ FromArray()

Bool FromArray	(	UChar *	selection,
		Int32	count
	)

Gets a number of selected elements from an array. The elements in the array are interpreted as Bool: 0 means the element is unselected, and 1 means it is selected.

Warning: The old selection will completely be overridden.

Parameters

[in]	selection	An array of elements to select. The caller owns the pointed array.
[in]	count	The number of elements in the array.

Returns: true if the elements from the array were selected successfully, otherwise false.

◆ ToArray()

UChar* ToArray ( Int32 count ) const

Gets an array of selected elements. The elements in the array are interpreted as Bool: 0 means the element is unselected, and 1 means it is selected.

Warning: The array is created with NewMemClear() and must be freed with DeleteMem() afterward.

Parameters

[in] count The number of elements to place into the array.

Returns: The array containing the selected elements or nullptr if failed. The caller owns the pointed array.

◆ ToBitSet()

Bool ToBitSet	(	Int32	count,
		maxon::BaseBitSet< maxon::DefaultAllocator > &	bitSet
	)		const

Returns: true if the elements from the array were selected successfully, otherwise false.

◆ Read()

Bool Read ( HyperFile * hf )

Reads a selection from a file.

Parameters

[in] hf The file to read a selection from. The caller owns the pointed hyper file.

Returns: true if a selection was successfully read, otherwise false.

◆ Write()

void Write ( HyperFile * hf )

Writes the selection to a file.

Parameters

[in] hf The file to write the selection to. The caller owns the pointed hyper file.

◆ FindSegment()

Bool FindSegment	(	Int32	num,
		Int32 *	segment
	)		const

Calculates which segment contains the element num and returns it in segment.

Parameters

[in]	num	An element number.
[out]	segment	Assigned the found segment index.

Returns: true if the segment was found, otherwise false.

◆ GetDirty()

Int32 GetDirty ( ) const

Gets the dirty counter of the selection.

Note: The dirty counter is increased every time a function that changes the selection is called.

Returns: The dirty counter.

◆ GetLastElement()

Int32 GetLastElement ( void ) const

Gets the last selected element, e.g. the last element selected through Select().

Returns: The last selected element.

◆ IsAllSelected()

Bool IsAllSelected ( Int32 num ) const

Checks if all elements from zero to num-1 are selected.

Parameters

[in] num Number of elements to check.

Returns: True, if all elements are selected.

◆ IsNothingSelected()

Bool IsNothingSelected ( ) const

Checks if nothing is selected.

Returns: True, if nothing is selected.

◆ GetData()

BaseSelectData* GetData ( )

Private.

◆ CopyFrom()

Bool CopyFrom	(	BaseSelectData *	ndata,
		Int32	ncnt
	)

Private.

Detailed Description

Private Member Functions

Alloc/Free

Selection/Segment Count

Select/Deselect/Toggle

Get/Check Selection

Copy/Clone

Merge/Deselect/cross

Conversion from/to Array

Read/Write

Miscellaneous

Private

Constructor & Destructor Documentation

◆ BaseSelect()

◆ ~BaseSelect()

Member Function Documentation

◆ Alloc()

◆ Free()

◆ GetCount()

◆ GetSegments()

◆ Select()

◆ SelectAll()

◆ Deselect() [1/2]

◆ DeselectAll()

◆ Toggle()

◆ ToggleAll()

◆ GetRange()

◆ IsSelected()

◆ CopyTo()

◆ GetClone()

◆ Merge()

◆ Deselect() [2/2]

◆ Cross()

◆ FromArray()

◆ ToArray()

◆ ToBitSet()

◆ Read()

◆ Write()

◆ FindSegment()

◆ GetDirty()

◆ GetLastElement()

◆ IsAllSelected()

◆ IsNothingSelected()

◆ GetData()

◆ CopyFrom()