graphicsImmediateDeferred Class Reference

Display a scene where some geometry can be pre rendered. More...

#include <graphicsImmediateDeferred.h>

Inheritance diagram for graphicsImmediateDeferred:

Collaboration diagram for graphicsImmediateDeferred:

List of all members.

Public Member Functions
	graphicsImmediateDeferred ()
	The containers by default delete their contents.
void	draw ()
	Draw to the global graphics stream.
virtual void	update ()
	When the static geometry changes the scene is recalculated.
Public Attributes
gobjContainer	gdynamic
	The deferred graphics is written here on update.
gobjContainer	graphicsDeferred
	Drawn when update() called.
gobjContainer	graphicsImmediate
	Always draw what is in this container.
bool	drawDeferredFirst
	Can swap the draw order.

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Detailed Description

Display a scene where some geometry can be pre rendered.

There are two types of graphics, pre rendered graphics and immediate graphics. The client pushes gobjs to graphicsDeferred and graphicsImmediate repsectively.

Motivation comes when graphics changes infrequently and when rendering it immediately is costly.

By having two graphics containers, one for immediate graphics which is evaluated every time draw() is called, and another for infrequently changing graphics which when update is called draw() is called.

Use:

Push gobj's constructed with new onto graphicsDeferred and graphicsImmediate as by default memory management is enabled.

gobj's in the deferred container should write to the global graphics stream with gobjpush(new gobj..). Because when graphicsDeferred.draw() is called the graphics needs to be created.

For example immediate graphics can use direct OpenGL calls. Whereas deferred could push graphics constructed with gobj's which wrap the OpenGL calls.

Deferred graphics is simply graphics that is less frequently updated.

Definition at line 44 of file graphicsImmediateDeferred.h.

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Constructor & Destructor Documentation

graphicsImmediateDeferred::graphicsImmediateDeferred

(

)

The containers by default delete their contents.

Definition at line 4 of file graphicsImmediateDeferred.cpp.

  : gdynamic(true), graphicsDeferred(true), 
    graphicsImmediate(true), drawDeferredFirst(true)
{
}

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Member Function Documentation

void graphicsImmediateDeferred::draw

(

)

[virtual]

Draw to the global graphics stream.

Implements gobj.

Definition at line 10 of file graphicsImmediateDeferred.cpp.

References gobjContainer::draw(), drawDeferredFirst, gdynamic, GOBJDEBUGCODE, and graphicsImmediate.

Referenced by mazedisp03::draw().

{
  GOBJDEBUGCODE
  glPushAttrib(GL_CURRENT_BIT);
  glPushAttrib(GL_LIGHTING_BIT);

  if (drawDeferredFirst)
  {
    gdynamic.draw();
    graphicsImmediate.draw();
  }
  else
  {
    graphicsImmediate.draw();
    gdynamic.draw();
  }

  glPopAttrib();
  glPopAttrib();
}

void graphicsImmediateDeferred::update

(

)

[virtual]

When the static geometry changes the scene is recalculated.

Definition at line 31 of file graphicsImmediateDeferred.cpp.

References gobjContainer::draw(), gdynamic, gobj::global, graphicsDeferred, gobjContainer::nuke(), and gobjContainer::set().

Referenced by mazedisp03::construct(), simplexD1tessapp01::createdisplay(), graphicsImmediateDeferredTestTri::graphicscreate02(), graphicsImmediateDeferredTestTri::graphicscreate03(), graphicsImmediateDeferredTestTri::graphicscreate04(), graphicsImmediateDeferredTestTri::graphicscreate05(), graphicsImmediateDeferredTestTri::graphicscreate06(), graphicsImmediateDeferredTestTri::graphicscreate07(), simplexD2tessapp01::test02(), and delaunaysimpleD2test::test02().

{
  gdynamic.nuke();
cout << "graphicsImmedateDeferred::update()" << endl;

  assert(gobjContainer::global!=0);
  // Save the current global graphics stream.
  gobjContainer & g(*gobjContainer::global);

  // Make this the new graphics stream.
  gdynamic.set();

  // Writes all the graphics to gobjContainer::global
  graphicsDeferred.draw();  

  // Restore global graphics stream.
  g.set();  
}

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Member Data Documentation

bool graphicsImmediateDeferred::drawDeferredFirst

Can swap the draw order.

Definition at line 60 of file graphicsImmediateDeferred.h.

Referenced by draw().

gobjContainer graphicsImmediateDeferred::gdynamic

The deferred graphics is written here on update.

Definition at line 52 of file graphicsImmediateDeferred.h.

Referenced by draw(), and update().

gobjContainer graphicsImmediateDeferred::graphicsDeferred

Drawn when update() called.

Definition at line 55 of file graphicsImmediateDeferred.h.

Referenced by tessD2disp02< TESS, PT, INDX >::displaycircles(), tessD2disp02< TESS, PT, INDX >::displaymulticolor(), tessD2disp02< TESS, PT, INDX >::displaypoints(), tessD2disp02< TESS, PT, INDX >::displaysimplexindex(), graphicsImmediateDeferredTestTri::graphicscreate02(), graphicsImmediateDeferredTestTri::graphicscreate03(), graphicsImmediateDeferredTestTri::graphicscreate07(), and update().

gobjContainer graphicsImmediateDeferred::graphicsImmediate

Always draw what is in this container.

Definition at line 57 of file graphicsImmediateDeferred.h.

Referenced by tessD2disp02< TESS, PT, INDX >::displaymesh(), draw(), and graphicsImmediateDeferredSwitch::pushimmediate().

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

• graphicslib/graphicsImmediateDeferred.h
• graphicslib/graphicsImmediateDeferred.cpp