public

Inheritance Graph

graph BT
	BudgetRenderer
	BudgetRenderer --> NodeRendererState
	click BudgetRenderer "classMinSG_1_1SVS_1_1BudgetRenderer"
	click NodeRendererState "classMinSG_1_1NodeRendererState"

Description

Budget rendering.

State to perform budget rendering. It collects the GeometryNodes that are going through a rendering channel. When it is deactivated, it displays the most important objects while keeping a budget. To perform the budget rendering, an instance of the 0-1 knapsack problem has to be solved. A greedy approximation is used to achieve this. The objects are sorted by the ratio of their primitive count divided by their projected size. Beginning with the lowest ratio, the objects are displayed iteratively until the budget has been reached. If an object has an attribute containing the projected size (see projectedSizeId ), the minimum of the calculated projected size and the attribute’s value is used for the ratio calculation. The attribute can be set by other renderers to influence the importance of objects.

Author: Benjamin Eikel

Date: 2013-07-23

Public Static Attributes

   
   
const Util::StringIdentifier projectedSizeId
Identifier of a node attribute containing the projected size.

Protected Functions

   
   
stateResult_t doEnableState( FrameContext & context, Node * node, const RenderParam & rp)
Clear the set of collected nodes.
   
void doDisableState( FrameContext & context, Node * node, const RenderParam & rp)
Display a subset of the collected nodes.

Public Functions

   
   
  BudgetRenderer()
   
BudgetRenderer * clone() const
Create a duplicate of this State object.
   
uint32_t getBudget() const
   
void setBudget(uint32_t newBudget)
Set the budget as number of primitives to render at most.

Documentation

variable
MinSG::SVS::BudgetRenderer::projectedSizeId

public static
 
 
const Util::StringIdentifier projectedSizeId

Identifier of a node attribute containing the projected size.

Defined in MinSG/Ext/SVS/BudgetRenderer.h:82

function
MinSG::SVS::BudgetRenderer::doEnableState

protected virtual
     
     
stateResult_t doEnableState( FrameContext & context,
  Node * node,
  const RenderParam & rp
)    

Clear the set of collected nodes.

Defined in MinSG/Ext/SVS/BudgetRenderer.h:63

function
MinSG::SVS::BudgetRenderer::doDisableState

protected virtual
     
     
void doDisableState( FrameContext & context,
  Node * node,
  const RenderParam & rp
)    

Display a subset of the collected nodes.

Defined in MinSG/Ext/SVS/BudgetRenderer.h:66

function
MinSG::SVS::BudgetRenderer::BudgetRenderer

public
   
   
BudgetRenderer( )

Defined in MinSG/Ext/SVS/BudgetRenderer.h:69

function
MinSG::SVS::BudgetRenderer::clone

public const virtual
   
   
BudgetRenderer * clone( ) const

Create a duplicate of this State object.

Defined in MinSG/Ext/SVS/BudgetRenderer.h:71

function
MinSG::SVS::BudgetRenderer::getBudget

public const inline
   
   
uint32_t getBudget( ) const

Defined in MinSG/Ext/SVS/BudgetRenderer.h:73

function
MinSG::SVS::BudgetRenderer::setBudget

public inline
     
     
void setBudget( uint32_t newBudget )

Set the budget as number of primitives to render at most.

Defined in MinSG/Ext/SVS/BudgetRenderer.h:77