XPLMProbeTerrainXYZ

XPLMProbeTerrainXYZ

XPLM_API XPLMProbeResult      XPLMProbeTerrainXYZ(
                                   XPLMProbeRef         inProbe,    
                                   float                inX,    
                                   float                inY,    
                                   float                inZ,    
                                   XPLMProbeInfo_t *    outInfo);    

Probes the terrain. Pass in the XYZ coordinate of the probe point, a probe object, and an XPLMProbeInfo_t struct that has its structSize member set properly. Other fields are filled in if we hit terrain, and a probe result is returned.