74 lines
1.9 KiB
C
74 lines
1.9 KiB
C
|
/**
|
||
|
|
* @file math_base.h
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef LV_MATH_H
|
||
|
|
#define LV_MATH_H
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/*********************
|
||
|
|
* INCLUDES
|
||
|
|
*********************/
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
/*********************
|
||
|
|
* DEFINES
|
||
|
|
*********************/
|
||
|
|
#define LV_MATH_MIN(a,b) ((a) < (b) ? (a) : (b))
|
||
|
|
#define LV_MATH_MAX(a,b) ((a) > (b) ? (a) : (b))
|
||
|
|
#define LV_MATH_ABS(x) ((x) > 0 ? (x) : (-(x)))
|
||
|
|
|
||
|
|
#define LV_TRIGO_SIN_MAX 32767
|
||
|
|
#define LV_TRIGO_SHIFT 15 /* >> LV_TRIGO_SHIFT to normalize*/
|
||
|
|
|
||
|
|
#define LV_BEZIER_VAL_MAX 1024 /*Max time in Bezier functions (not [0..1] to use integers) */
|
||
|
|
#define LV_BEZIER_VAL_SHIFT 10 /*log2(LV_BEZIER_VAL_MAX): used to normalize up scaled values*/
|
||
|
|
|
||
|
|
/**********************
|
||
|
|
* TYPEDEFS
|
||
|
|
**********************/
|
||
|
|
|
||
|
|
/**********************
|
||
|
|
* GLOBAL PROTOTYPES
|
||
|
|
**********************/
|
||
|
|
/**
|
||
|
|
* Convert a number to string
|
||
|
|
* @param num a number
|
||
|
|
* @param buf pointer to a `char` buffer. The result will be stored here (max 10 elements)
|
||
|
|
* @return same as `buf` (just for convenience)
|
||
|
|
*/
|
||
|
|
char * lv_math_num_to_str(int32_t num, char * buf);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Return with sinus of an angle
|
||
|
|
* @param angle
|
||
|
|
* @return sinus of 'angle'. sin(-90) = -32767, sin(90) = 32767
|
||
|
|
*/
|
||
|
|
int16_t lv_trigo_sin(int16_t angle);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Calculate a value of a Cubic Bezier function.
|
||
|
|
* @param t time in range of [0..LV_BEZIER_VAL_MAX]
|
||
|
|
* @param u0 start values in range of [0..LV_BEZIER_VAL_MAX]
|
||
|
|
* @param u1 control value 1 values in range of [0..LV_BEZIER_VAL_MAX]
|
||
|
|
* @param u2 control value 2 in range of [0..LV_BEZIER_VAL_MAX]
|
||
|
|
* @param u3 end values in range of [0..LV_BEZIER_VAL_MAX]
|
||
|
|
* @return the value calculated from the given parameters in range of [0..LV_BEZIER_VAL_MAX]
|
||
|
|
*/
|
||
|
|
int32_t lv_bezier3(uint32_t t, int32_t u0, int32_t u1, int32_t u2, int32_t u3);
|
||
|
|
|
||
|
|
/**********************
|
||
|
|
* MACROS
|
||
|
|
**********************/
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
} /* extern "C" */
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif
|