remove unused code and use code from simgear

diff --git a/src/Environment/ridge_lift.cxx b/src/Environment/ridge_lift.cxx
index 5f0bd26396dc5ea40a9c1ec19e1b9047a5c38b98..3b675a93ff686f3d4c3eef285018f8fda05fa1da 100644 (file)
--- a/src/Environment/ridge_lift.cxx
+++ b/src/Environment/ridge_lift.cxx
@@ -36,25 +36,12 @@
 #include <Scenery/scenery.hxx>
 #include <string>
 #include <math.h>
-
+#include <simgear/sg_inlines.h>
 
 using std::string;
 
 #include "ridge_lift.hxx"
 
-static string CreateIndexedPropertyName(string Property, int index)
-{
-       std::stringstream str;
-       str << index;
-       string tmp;
-       str >> tmp;
-       return Property + "[" + tmp + "]";
-}
-
-static inline double sign(double x) {
-       return x == 0 ? 0 : x > 0 ? 1.0 : -1.0;
-}
-
 static const double BOUNDARY1_m = 40.0;
 
 const double FGRidgeLift::dist_probe_m[] = { // in meters
@@ -172,7 +159,7 @@ void FGRidgeLift::update(double dt) {
                slope[3] = (probe_elev_m[4] - probe_elev_m[0]) / -dist_probe_m[4];
        
                for (unsigned i = 0; i < sizeof(slope)/sizeof(slope[0]); i++)
-                       adj_slope[i] = sin(atan(5.0 * pow ( (fabs(slope[i])),1.7) ) ) *sign(slope[i]);
+                       adj_slope[i] = sin(atan(5.0 * pow ( (fabs(slope[i])),1.7) ) ) *SG_SIGN<double>(slope[i]);
        
                //adjustment
                adj_slope[0] *= 0.2;