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#ifndef _CONVERT_H_

#define _CONVERT_H_

// convert.h: header file

/********************************************************************

//

// Module:

//   Collection of type conversion parameters and functions

//

// Authors:     Winnie Cheng<wwcheng@stanford.edu>,

//              Peter Wu<peter5@stanford.edu>

 *********************************************************************/

/* common angles in fixed point format */

#define INT90  (0x2d00) /* Predefine 90 degrees in fixed point format  */

#define INT180 (0x5a00) /* Predefine 180 degrees in fixed point format */

/* start values for some rotation */

#define START_SINCOS_Y          0x004e

#define START_SINHCOSH_X        0x009b  // 1.2074

/* specification for fixed point format */

#define FRACTBITS 7          /* Number of fractional bits */

#define CONV (1<<FRACTBITS)  /* Conversion factor to fixed-point format */

/* fixed-point <-> floating point conversion functions */

  /* convert from fixed point to float */

#define tofp(i)   ((double)(1.0*i)/(1.0*CONV))

  /* convert from float to fixed point */

#define toint(fp) ((short)(fp*CONV+0.5))

#endif /* _CONVERT_H_ */