--- ray/src/rt/pmapbias.h	2016/05/17 17:39:47	2.5
+++ ray/src/rt/pmapbias.h	2024/09/17 16:36:05	2.6
@@ -1,4 +1,4 @@
-/* RCSid $Id: pmapbias.h,v 2.5 2016/05/17 17:39:47 rschregle Exp $ */
+/* RCSid $Id: pmapbias.h,v 2.6 2024/09/17 16:36:05 greg Exp $ */
 
 /* 
    ==================================================================
@@ -12,7 +12,7 @@
    (c) Fraunhofer Institute for Solar Energy Systems
    ==================================================================
       
-   $Id: pmapbias.h,v 2.5 2016/05/17 17:39:47 rschregle Exp $
+   $Id: pmapbias.h,v 2.6 2024/09/17 16:36:05 greg Exp $
 */
 
 
@@ -20,7 +20,11 @@
    #define PMAPBIASCOMP_H
 
    #include "pmapdata.h"
-      
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
    /* Bias compensation weighting function */
    /* #define BIASCOMP_WGT(n) 1 */
    /* #define BIASCOMP_WGT(n) (n) */
@@ -38,5 +42,9 @@
    void volumeBiasComp (PhotonMap*, const RAY*, COLOR);   
    /* Photon volume density estimate with bias compensation, returning
       irradiance. Expects photons in search queue after a kd-tree lookup. */
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif