//

// File:        trackball.h

//

// Abstract:    Implements a trackball like camera system

//

// Version:     1.1 - minor fixes.

//              1.0 - Original release.

//              

//

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#ifndef __trackball_h__

#define __trackball_h__

#ifdef __cplusplus

extern "C" {

#endif

// called with the start position and the window origin + size

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

// calculated rotation based on current mouse position

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

// add a GL rotation (dA) to an existing GL rotation (A)

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

#ifdef __cplusplus

}

#endif

#endif