+ void setOnWater(bool c);
+ void setOnSolid(bool c);
+ void setSpringFactorNotPlaning(float f);
+ void setSpeedPlaning(float s);
+ void setReduceFrictionByExtension(float s);
+ void setInitialLoad(float l);
+ void setIgnoreWhileSolving(bool c);
+ void setGlobalGround(double* global_ground, float* global_vel,
+ double globalX, double globalY,
+ const SGMaterial *material);