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kinect-viewer / trackball.h

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//
// 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