//

// File:       trackball.h

//

// Abstract:   Implements a trackball like input method

//

// Version:    1.0

//

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#ifndef __trackball_h__

#define __trackball_h__

#ifdef __cplusplus

extern "C" {

#endif

void startTrackball (long x, long y, long originX, long originY, long width, long height);

void rollToTrackball (long x, long y, float rot [4]); // rot is output rotation angle

void addToRotationTrackball (float * dA, float * A);

#ifdef __cplusplus

}

#endif

#endif