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Initial check-in based on OpenGL Performer 2.4 tree.
-flynnt

//
// Copyright 1995, Silicon Graphics, Inc.
// ALL RIGHTS RESERVED
//
// This source code ("Source Code") was originally derived from a
// code base owned by Silicon Graphics, Inc. ("SGI")
// 
// LICENSE: SGI grants the user ("Licensee") permission to reproduce,
// distribute, and create derivative works from this Source Code,
// provided that: (1) the user reproduces this entire notice within
// both source and binary format redistributions and any accompanying
// materials such as documentation in printed or electronic format;
// (2) the Source Code is not to be used, or ported or modified for
// use, except in conjunction with OpenGL Performer; and (3) the
// names of Silicon Graphics, Inc.  and SGI may not be used in any
// advertising or publicity relating to the Source Code without the
// prior written permission of SGI.  No further license or permission
// may be inferred or deemed or construed to exist with regard to the
// Source Code or the code base of which it forms a part. All rights
// not expressly granted are reserved.
// 
// This Source Code is provided to Licensee AS IS, without any
// warranty of any kind, either express, implied, or statutory,
// including, but not limited to, any warranty that the Source Code
// will conform to specifications, any implied warranties of
// merchantability, fitness for a particular purpose, and freedom
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// conform to the program, or any warranty that the Source Code will
// be error free.
// 
// IN NO EVENT WILL SGI BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT
// LIMITED TO DIRECT, INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES,
// ARISING OUT OF, RESULTING FROM, OR IN ANY WAY CONNECTED WITH THE
// SOURCE CODE, WHETHER OR NOT BASED UPON WARRANTY, CONTRACT, TORT OR
// OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
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// OR AROSE OUT OF USE OR RESULTS FROM USE OF, OR LACK OF ABILITY TO
// USE, THE SOURCE CODE.
// 
// Contact information:  Silicon Graphics, Inc., 
// 1600 Amphitheatre Pkwy, Mountain View, CA  94043, 
// or:  http://www.sgi.com
//
//
// culldlC.C  code fragment for complexC.C demonstrating use of cull 
//	     callback for user rendering to display list.  
//	     Uses MakeColorCube().
//
// $Revision: 1.1 $ 
// $Date: 2000/11/21 21:39:37 $
//

#include <Performer/pf/pfChannel.h>

#include <Performer/pr/pfLinMath.h>
#include <Performer/pr/pfGeoSet.h>

#include <Performer/pr/pfGeoSet.h>

// colorcube.c 
extern pfGeoSet* MakeColorCube(void);


pfMatrix Mat = pfMatrix(1.0f, 0.0f, 0.0f, 0.0f,
			0.0f, 1.0f, 0.0f, 0.0f,
			0.0f, 0.0f, 1.0f, 0.0f,
			0.0f, 0.0f, 0.0f, 1.0f);

pfMatrix Xform = pfMatrix( 0.9998f, 0.02f,   0.0f, 0.0f,
			  -0.02f,   0.9998f, 0.0f, 0.0f,
			   0.0f,    0.0f,    1.0f, 0.0f,
			   0.0f,    0.0f,    0.0f, 1.0f);

pfGeoSet *GSet = NULL;

//
//	CullChannel() -- traverse the scene graph and generate a display list
//	for the draw process.


void
CullChannel(pfChannel *, void *)
{
    pfCull();
    
    // draw a geoset not in the scene hierarchy to the display list 
    
    // make geoset if needed 
    if (GSet == NULL)
	GSet = MakeColorCube();
    
    // compute new transform 
    Mat.preMult(Xform);
    
    // add a push matrix command to the display list 
    pfPushMatrix();
    
    // add a mult matrix command to the display list 
    pfMultMatrix(Mat);
    
    // add a draw geoset command to the display list 
    GSet->draw();
    
    // add a pop matrix command to the display list 
    pfPopMatrix();
}