DeepSkyItem Class Reference

#include <deepskyitem.h>

Inheritance diagram for DeepSkyItem:

Public Member Functions
	DeepSkyItem (DeepSkyComponent *dsoComp, RootNode *rootNode)
virtual void	update ()
void	updateDeepSkyNode (DSOIndexNode *node, bool drawObject, MeshIterator *region, bool drawImage=false)
Public Member Functions inherited from SkyItem
	SkyItem (LabelsItem::label_t labelType, RootNode *rootNode=nullptr)
virtual	~SkyItem ()
virtual void	hide () override
void	hideLabels ()
LabelsItem::label_t	labelType ()
RootNode *	rootNode ()
virtual void	show () override
Public Member Functions inherited from SkyOpacityNode
bool	visible ()
Public Member Functions inherited from QSGOpacityNode
qreal	opacity () const const
void	setOpacity (qreal opacity)
Public Member Functions inherited from QSGNode
void	appendChildNode (QSGNode *node)
QSGNode *	childAtIndex (int i) const const
int	childCount () const const
QSGNode *	firstChild () const const
Flags	flags () const const
void	insertChildNodeAfter (QSGNode *node, QSGNode *after)
void	insertChildNodeBefore (QSGNode *node, QSGNode *before)
virtual bool	isSubtreeBlocked () const const
QSGNode *	lastChild () const const
void	markDirty (DirtyState bits)
QSGNode *	nextSibling () const const
QSGNode *	parent () const const
void	prependChildNode (QSGNode *node)
virtual void	preprocess ()
QSGNode *	previousSibling () const const
void	removeAllChildNodes ()
void	removeChildNode (QSGNode *node)
void	setFlag (Flag f, bool enabled)
void	setFlags (Flags f, bool enabled)
NodeType	type () const const

Additional Inherited Members
Public Types inherited from QSGNode
typedef	DirtyState
enum	DirtyStateBit
enum	Flag
typedef	Flags
enum	NodeType
Public Attributes inherited from QSGNode
	BasicNodeType
	ClipNodeType
	DirtyForceUpdate
	DirtyGeometry
	DirtyMaterial
	DirtyMatrix
	DirtyNodeAdded
	DirtyNodeRemoved
	DirtyOpacity
	DirtyPropagationMask
	DirtySubtreeBlocked
	DirtyUsePreprocess
	GeometryNodeType
	InternalReserved
	IsVisitableNode
	OpacityNodeType
	OwnedByParent
	OwnsGeometry
	OwnsMaterial
	OwnsOpaqueMaterial
	RenderNodeType
	RootNodeType
	TransformNodeType
	UsePreprocess

Detailed Description

Class that handles representation of Deep Sky Objects.

Author

Artem Fedoskin

Version

1.0

Definition at line 65 of file deepskyitem.h.

Constructor & Destructor Documentation

DeepSkyItem()

DeepSkyItem::DeepSkyItem	(	DeepSkyComponent *	dsoComp,
		RootNode *	rootNode )

Constructor.

Instantiates DSOIndexNodes for catalogs

Parameters

dsoComp	pointer to DeepSkyComponent that handles data
rootNode	parent RootNode that instantiated this object

Definition at line 62 of file deepskyitem.cpp.

Member Function Documentation

update()

void DeepSkyItem::update ( )

virtual

Call update on all DSOIndexNodes (catalogs)

Implements SkyItem.

Definition at line 112 of file deepskyitem.cpp.

updateDeepSkyNode()

void DeepSkyItem::updateDeepSkyNode	(	DSOIndexNode *	node,
		bool	drawObject,
		MeshIterator *	region,
		bool	drawImage = false )

update all nodes needed to represent DSO in the given DSOIndexNode In this function we perform some tricks to reduce memory consumption:

1. Each TrixelNode has hideCount() function that returns the number of updates, during which this TrixelNode was hidden. Whenever TrixelNode becomes visible this counter is set to 0 and is not being incremented.
2. Based on the zoom level we calculate the limit for hideCount. If hideCount() of particular TrixelNode is larger than the limit, we delete all nodes of this TrixelNode.
3. If DSOTrixelNode is visible, we iterate over its DeepSkyObjects and DeepSkyNodes. If hideCount of DeepSkyNode is larger than the limit we delete it. If DeepSkyObject is visible but no DeepSkyNode to represent this object is created, we instantiate a new one.

   Parameters

   node	- DSOIndexNode(catalog) that should be updated
   drawObject	- true if objects from this catalog should be drawn, false otherwise
   region	- MeshIterator that should be used to iterate over visible trixels
   drawImage	- true if images for objects should be drawn, false otherwise

Definition at line 130 of file deepskyitem.cpp.

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The documentation for this class was generated from the following files:

• deepskyitem.h
• deepskyitem.cpp