Polygons in Performer 2.0

New Message Reply Date view Thread view Subject view Author view

Daniela Rainer (zrgr0390++at++awssg7.rus.uni-stuttgart.de)
Tue, 16 Jan 1996 14:36:21 +0000

Hi,

thanks to all who answered my question, but I have still the same problem:

If I define a polygon

        3 2
        ---------
| |
| |
| |
        ---------
        0 1

        ........

          static pfVec3 coordArray[4] = {
                                        {0.0f, 0.0f, 0.0f},
                                          {1.0f, 0.0f, 0.0f},
                                        {1.0f, 0.0f, 0.5f},
                                        {0.0f, 0.0f, 0.5f}
                                        };

          static pfVec4 colorArray[4] = {
                                        {1.0f, 0.0f, 0.0f, 1.0f},
                                          {1.0f, 0.0f, 0.0f, 1.0f},
                                        {1.0f, 0.5f, 0.0f, 1.0f},
                                        {0.0f, 0.5f, 0.0f, 1.0f}
                                        };

        static int primLenghthsArray[1] = {4};

          static pfVec3 normalArray[4]={{0.0f, -1.0f, 0.0f},
                                        {0.0f, -1.0f, 0.0f},
                                        {0.0f, -1.0f, 0.0f},
                                        {0.0f, -1.0f, 0.0f}};

        .......

          pfGSetAttr(geoset, PFGS_COORD3, PFGS_PER_VERTEX, coordArray, NULL);

          pfGSetAttr(geoset, PFGS_COLOR4, PFGS_PER_VERTEX, colorArray,NULL);

          pfGSetAttr(geoset, PFGS_NORMAL3, PFGS_PER_VERTEX, normalArray, NULL);

          pfGSetPrimType(geoset,PFGS_POLYS);

          pfGSetNumPrims(geoset, 1);

          pfGSetPrimLengths(geoset, primLenghthsArray);

        .......

        pfCullFace(PFCF_OFF);

        ......

Performer draws the correct polygon in wireframe mode but in filled mode
it draws the triangles 0-1-2 and 1-2-3.
And if pfCullFace is on, I don't see the second triangle because the normal is
wrong.

Regards,

Daniela

-- 
Daniela Rainer
rainer++at++rus.uni-stuttgart.de




/********************************************************************************/
/*									     	*/
/*	Problem with polygons							*/
/*										*/
/********************************************************************************/




#define 	PF_CPLUSPLUS_API 0


#include 	<Performer/pf.h>
#include 	<Performer/pr.h>
#include 	<Performer/pfutil.h>
#include 	<Performer/pfdu.h>




main()
{
	pfScene		*scene;
	pfLightSource	*sun;
	pfPipe		*pipe;
	pfPipeWindow    *pwin;
	pfChannel	*chan;
  	pfGeoSet	*geoset;
	pfGeode         *geode;
	pfEarthSky	*esky;
	pfCoord		view;
  	static pfVec3   coordArray[4] = {
					{0.0f, 0.0f, 0.0f},
  					{1.0f, 0.0f, 0.0f},
					{1.0f, 0.0f, 0.5f},
					{0.0f, 0.0f, 0.5f}
					};
	
	
  	static pfVec4   colorArray[4] = {
					{1.0f, 0.0f, 0.0f, 1.0f},
  					{1.0f, 0.0f, 0.0f, 1.0f},
					{1.0f, 0.5f, 0.0f, 1.0f},
					{0.0f, 0.5f, 0.0f,1.0f}
					}; 
					
	static int	primLenghthsArray[1]={4};
  	 
  	static pfVec3 	normalArray[4]={{0.0f, -1.0f, 0.0f},
					{0.0f, -1.0f, 0.0f},
					{0.0f, -1.0f, 0.0f},
					{0.0f, -1.0f, 0.0f}};
  
  /***/
  
  pfInit();
  
  /***/


  pfMultiprocess(PFMP_APPCULLDRAW);
  pfConfig();
  
  /** init the scenegraph **/
  
  scene = pfNewScene();
  
  sun = pfNewLSource();
  pfLSourceColor(sun, PFLT_AMBIENT, 1.0f,1.0f,0.8f);
  pfLSourceAmbient(sun, 1.0f, 1.0f, 1.0f);
  pfLSourcePos(sun, 0.0f, 0.0f, 1.0f,0.0f);
  pfLSourceOn(sun);  
  pfAddChild(scene, sun);


  esky = pfNewESky();
  pfESkyColor(esky, PFES_CLEAR, 0.1, 0.1, 0.1, 1.0);


  /** geometry **/


  geode = pfNewGeode();
  geoset = pfNewGSet(NULL);
  
  pfGSetAttr(geoset, PFGS_COORD3, PFGS_PER_VERTEX, coordArray, NULL);
  pfGSetAttr(geoset, PFGS_COLOR4, PFGS_PER_VERTEX, colorArray, NULL); 
  pfGSetAttr(geoset, PFGS_NORMAL3, PFGS_PER_VERTEX, normalArray, NULL); 
  pfGSetPrimType(geoset,PFGS_POLYS); 
 
  pfGSetNumPrims(geoset, 1);
  pfGSetPrimLengths(geoset, primLenghthsArray);
  pfAddGSet(geode, geoset);
  
 
   
  /* pfPrint(geode,PFTRAV_SELF|PFTRAV_DESCEND,PFPRINT_VB_DEBUG,NULL);*/


  
  pfAddChild(scene, geode); 




  /** init the pipe and the pipewindow */
  
  pipe = pfGetPipe(0);
  pwin = pfNewPWin(pipe);
  pfPWinName(pwin, "Polygon Test");
  pfPWinOriginSize(pwin, 0, 0, 500, 500);
  pfOpenPWin(pwin);
   
  pfCullFace(PFCF_OFF);


  
  /** init the channel **/ 
  
  chan = pfNewChan(pipe);
 
  pfChanScene(chan,scene);
  
  pfSetVec3(view.xyz, 0.0f, -5.0f, 0.0f);
  pfSetVec3(view.hpr, 0.0f, 0.0f, 0.0f);
  pfChanView(chan, view.xyz, view.hpr);
  
  pfChanESky(chan, esky);


  pfChanNearFar(chan, 1.0f, 100.0f);
  
  
  /***/


  while (1)
  {
  
    pfSync();
    pfFrame();
  }
  
  
}

New Message Reply Date view Thread view Subject view Author view

This archive was generated by hypermail 2.0b2 on Mon Aug 10 1998 - 17:52:15 PDT

This message has been cleansed for anti-spam protection. Replace '++at++' in any mail addresses with the '@' symbol.