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add bezier solver function and combine math and trigo files

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This commit is contained in:
Gabor Kiss-Vamosi
2018-06-11 10:30:06 +02:00
parent c858a13aa3
commit df226053cf
6 changed files with 108 additions and 148 deletions
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25
lv_misc/lv_math.h
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@@ -19,11 +19,16 @@ extern "C" {
/*********************
* 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
**********************/
@@ -39,6 +44,24 @@ extern "C" {
*/
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
**********************/