--- ray/src/rt/pmapdata.h	2015/05/08 13:20:22	2.2
+++ ray/src/rt/pmapdata.h	2015/05/20 14:44:12	2.5
@@ -8,7 +8,7 @@
    supported by the Swiss National Science Foundation (SNSF, #147053)
    ==================================================================
    
-   $Id: pmapdata.h,v 2.2 2015/05/08 13:20:22 rschregle Exp $
+   $Id: pmapdata.h,v 2.5 2015/05/20 14:44:12 greg Exp $
 */
 
 
@@ -34,8 +34,9 @@
 
    /* Primary photon ray for light source contributions */
    typedef struct {
-      short srcIdx;               /* Index of emitting light source */
-      float dir [3], org [3];     /* Incident dir & origin on source */
+      uint32 srcIdx;              /* Index of emitting light source */
+      int32 dir;                  /* Encoded ray direction */
+      float pos [3];              /* Hit point */
    } PhotonPrimary;
       
    #define photonSrcIdx(pm, p) ((pm) -> primary [(p) -> primary].srcIdx)
@@ -53,7 +54,7 @@
          COLR flux;                  /* Photon flux */
       #endif
 
-      unsigned primary;              /* Index to primary ray */
+      uint32 primary;              /* Index to primary ray */
    } Photon;
    
    /* Photon flag bitmasks and manipulation macros */