math.h

[詳解]

 
#pragma once
 
#include <complex.h>
#include <stdbool.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
// 内部使用向け

#ifdef __NO_LONG_DOUBLE_MATH
    #define fpfallback(fn) fn
#else
    #define fpfallback(fn) fn##l
#endif

#define fpcall(fn, ...) \
    (sizeof(SL_FP_T) == sizeof(double)      ? fn(__VA_ARGS__) \
        : sizeof(SL_FP_T) == sizeof(float)  ? fn##f(__VA_ARGS__) \
                                            : fpfallback(fn)(__VA_ARGS__))


#define invlerp(from, to, value) (((value) - (from)) / ((to) - (from)))

#define clamp(value, low, high) \
    ((value) < (low) ? (low) : (high) < (value) ? (high) : (value))

typedef struct {
    SL_FP_T x;
    SL_FP_T y;
} cart_t;

typedef struct {
    SL_FP_T r;
    SL_FP_T theta;
} polar_t;

bool approx(double a, double b);

bool approxf(float a, float b);

bool approxl(long double a, long double b);

cart_t create_cart(SL_FP_T x, SL_FP_T y);

polar_t create_polar(SL_FP_T r, SL_FP_T theta);

polar_t cart2pol(SL_FP_T x, SL_FP_T y);

cart_t pol2cart(SL_FP_T r, SL_FP_T theta);

SL_FP_T dot(cart_t a, cart_t b);

cart_t vec_scale(cart_t vec, SL_FP_T scaler);
 
#ifdef __cplusplus
}
#endif