XC.H

#ifndef __xc_h__ 
#define __xc_h__ 
 
#include "sscommon.h" 
 
 
// useful for xc-coords 
enum { 
    RIGHT = 0, 
    TOP, 
    LEFT, 
    BOTTOM 
}; 
 
// Cross_section (xc) class 
 
class XC { 
public: 
    GLfloat     xLeft, xRight;  // bounding box 
    GLfloat     yTop, yBottom; 
    int         numPts; 
    POINT2D     *pts;        // CW points around the xc, from +x 
 
    XC( int numPts ); 
    XC( const XC& xc ); 
    XC( XC *xc ); 
    ~XC(); 
    void        Scale( float scale ); 
    float       MaxExtent(); 
    float       MinTurnRadius( int relDir ); 
    void        CalcArcACValues90( int dir, float r, float *acPts ); 
    void        CalcArcACValuesByDistance(  float *acPts ); 
    void        ConvertPtsZ( POINT3D *pts, float z ); 
protected: 
    void        CalcBoundingBox(); 
}; 
 
// Specific xc's derived from base xc class 
 
class ELLIPTICAL_XC : public XC { 
public: 
    ELLIPTICAL_XC( float r1, float r2 ); 
    ~ELLIPTICAL_XC(); 
private: 
    void SetControlPoints( float r1, float r2 ); 
}; 
 
class RANDOM4ARC_XC : public XC { 
public: 
    RANDOM4ARC_XC( float r ); 
    ~RANDOM4ARC_XC(); 
private: 
    void SetControlPoints( float radius ); 
}; 
 
#endif __xc_h__