- TRACE_NONE, /* No tracing */
- TRACE_TEXT, /* Minimal status */
- TRACE_PHM, /* Show phantom */
- TRACE_RAYS, /* Show all rays */
- TRACE_PLOT, /* Plot raysums */
- TRACE_CLIPPING /* Plot clipping */
+ TRACE_INVALID=-1,
+ TRACE_NONE=0, /* No tracing */
+ TRACE_TEXT, /* Minimal status */
+ TRACE_PHM, /* Show phantom */
+ TRACE_RAYS, /* Show all rays */
+ TRACE_PLOT, /* Plot raysums */
+ TRACE_CLIPPING /* Plot clipping */