Ellipse2d.h

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// Ellipse2d.h:
// ------------
//

#ifndef __IPSDKMATH_ELLIPSE2D_H__
#define __IPSDKMATH_ELLIPSE2D_H__

#include <IPSDKMath/IPSDKMathExports.h>
#include <IPSDKUtil/BaseTypes.h>

namespace ipsdk {
namespace math {


IPSDKMATH_API bool
convertEllipseFromQuadratic(const ipReal64 a11, const ipReal64 a12, const ipReal64 a22,
                            const ipReal64 b1, const ipReal64 b2, const ipReal64 c,
                            ipReal64& cx, ipReal64& cy, ipReal64& theta,
                            ipReal64& a, ipReal64& b);

IPSDKMATH_API bool
convertEllipseToQuadratic(const ipReal64 cx, const ipReal64 cy, const ipReal64 theta,
                          const ipReal64 a, const ipReal64 b,
                          ipReal64& a11, ipReal64& a12, ipReal64& a22,
                          ipReal64& b1, ipReal64& b2, ipReal64& c);

IPSDKMATH_API ipReal64
ellipsePerimeterLowerBound(const ipReal64 a, const ipReal64 b);

IPSDKMATH_API ipReal64
ellipsePerimeterUpperBound(const ipReal64 a, const ipReal64 b);

IPSDKMATH_API ipReal64
ellipseArea(const ipReal64 a, const ipReal64 b);

IPSDKMATH_API ipReal64
ellipseExcentricity(const ipReal64 a, const ipReal64 b);

IPSDKMATH_API bool
equivalentEllipse(const ipReal64 perimeter, const ipReal64 area,
                  ipReal64& a, ipReal64& b);

IPSDKMATH_API ipReal64
ellipseRadius(const ipReal64 a, const ipReal64 b,
              const ipReal64 phi);

IPSDKMATH_API ipReal64
ellipseRadius(const ipReal64 a, const ipReal64 b, const ipReal64 ellipseOrient,
              const ipReal64 theta);

IPSDKMATH_API void
ellipsePoint(const ipReal64 xc, const ipReal64 yc,
             const ipReal64 a, const ipReal64 b,
             const ipReal64 ellipseOrient,
             const ipReal64 theta,
             ipReal64& ptX, ipReal64& ptY);


} // end of namespace math
} // end of namespace ipsdk

#endif // __IPSDKMATH_ELLIPSE2D_H__