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Added 2 helper methods to Math.

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Relintai 2022-07-02 21:55:46 +02:00
parent 4d93d8da94
commit fa2ac74a7c
1 changed files with 80 additions and 25 deletions
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105
core/math/math_funcs.h
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@ -92,6 +92,8 @@ public:
static _ALWAYS_INLINE_ double floor(double p_x) { return ::floor(p_x); } static _ALWAYS_INLINE_ double floor(double p_x) { return ::floor(p_x); }
static _ALWAYS_INLINE_ float floor(float p_x) { return ::floorf(p_x); } static _ALWAYS_INLINE_ float floor(float p_x) { return ::floorf(p_x); }
// x + 0.5 -> so f.e. 0.9999999 will become 1
static _ALWAYS_INLINE_ int floorf_int(const float x) { return static_cast<int>(x + 0.5); }
static _ALWAYS_INLINE_ double ceil(double p_x) { return ::ceil(p_x); } static _ALWAYS_INLINE_ double ceil(double p_x) { return ::ceil(p_x); }
static _ALWAYS_INLINE_ float ceil(float p_x) { return ::ceilf(p_x); } static _ALWAYS_INLINE_ float ceil(float p_x) { return ::ceilf(p_x); }
@ -105,6 +107,9 @@ public:
static _ALWAYS_INLINE_ double exp(double p_x) { return ::exp(p_x); } static _ALWAYS_INLINE_ double exp(double p_x) { return ::exp(p_x); }
static _ALWAYS_INLINE_ float exp(float p_x) { return ::expf(p_x); } static _ALWAYS_INLINE_ float exp(float p_x) { return ::expf(p_x); }
// can save typing static_cast<float>
inline static float divf(const float a, const float b) { return a / b; }
static _ALWAYS_INLINE_ bool is_nan(double p_val) { static _ALWAYS_INLINE_ bool is_nan(double p_val) {
#ifdef _MSC_VER #ifdef _MSC_VER
return _isnan(p_val); return _isnan(p_val);
@ -177,10 +182,18 @@ public:
#endif #endif
} }
static _ALWAYS_INLINE_ double abs(double g) { return absd(g); } static _ALWAYS_INLINE_ double abs(double g) {
static _ALWAYS_INLINE_ float abs(float g) { return absf(g); } return absd(g);
static _ALWAYS_INLINE_ int abs(int g) { return g > 0 ? g : -g; } }
static _ALWAYS_INLINE_ int64_t abs(int64_t g) { return g > 0 ? g : -g; } static _ALWAYS_INLINE_ float abs(float g) {
return absf(g);
}
static _ALWAYS_INLINE_ int abs(int g) {
return g > 0 ? g : -g;
}
static _ALWAYS_INLINE_ int64_t abs(int64_t g) {
return g > 0 ? g : -g;
}
static _ALWAYS_INLINE_ double fposmod(double p_x, double p_y) { static _ALWAYS_INLINE_ double fposmod(double p_x, double p_y) {
double value = Math::fmod(p_x, p_y); double value = Math::fmod(p_x, p_y);
@ -206,14 +219,26 @@ public:
return value; return value;
} }
static _ALWAYS_INLINE_ double deg2rad(double p_y) { return p_y * Math_PI / 180.0; } static _ALWAYS_INLINE_ double deg2rad(double p_y) {
static _ALWAYS_INLINE_ float deg2rad(float p_y) { return p_y * (float)(Math_PI / 180.0); } return p_y * Math_PI / 180.0;
}
static _ALWAYS_INLINE_ float deg2rad(float p_y) {
return p_y * (float)(Math_PI / 180.0);
}
static _ALWAYS_INLINE_ double rad2deg(double p_y) { return p_y * 180.0 / Math_PI; } static _ALWAYS_INLINE_ double rad2deg(double p_y) {
static _ALWAYS_INLINE_ float rad2deg(float p_y) { return p_y * (float)(180.0 / Math_PI); } return p_y * 180.0 / Math_PI;
}
static _ALWAYS_INLINE_ float rad2deg(float p_y) {
return p_y * (float)(180.0 / Math_PI);
}
static _ALWAYS_INLINE_ double lerp(double p_from, double p_to, double p_weight) { return p_from + (p_to - p_from) * p_weight; } static _ALWAYS_INLINE_ double lerp(double p_from, double p_to, double p_weight) {
static _ALWAYS_INLINE_ float lerp(float p_from, float p_to, float p_weight) { return p_from + (p_to - p_from) * p_weight; } return p_from + (p_to - p_from) * p_weight;
}
static _ALWAYS_INLINE_ float lerp(float p_from, float p_to, float p_weight) {
return p_from + (p_to - p_from) * p_weight;
}
static _ALWAYS_INLINE_ double lerp_angle(double p_from, double p_to, double p_weight) { static _ALWAYS_INLINE_ double lerp_angle(double p_from, double p_to, double p_weight) {
double difference = fmod(p_to - p_from, Math_TAU); double difference = fmod(p_to - p_from, Math_TAU);
@ -226,11 +251,19 @@ public:
return p_from + distance * p_weight; return p_from + distance * p_weight;
} }
static _ALWAYS_INLINE_ double inverse_lerp(double p_from, double p_to, double p_value) { return (p_value - p_from) / (p_to - p_from); } static _ALWAYS_INLINE_ double inverse_lerp(double p_from, double p_to, double p_value) {
static _ALWAYS_INLINE_ float inverse_lerp(float p_from, float p_to, float p_value) { return (p_value - p_from) / (p_to - p_from); } return (p_value - p_from) / (p_to - p_from);
}
static _ALWAYS_INLINE_ float inverse_lerp(float p_from, float p_to, float p_value) {
return (p_value - p_from) / (p_to - p_from);
}
static _ALWAYS_INLINE_ double range_lerp(double p_value, double p_istart, double p_istop, double p_ostart, double p_ostop) { return Math::lerp(p_ostart, p_ostop, Math::inverse_lerp(p_istart, p_istop, p_value)); } static _ALWAYS_INLINE_ double range_lerp(double p_value, double p_istart, double p_istop, double p_ostart, double p_ostop) {
static _ALWAYS_INLINE_ float range_lerp(float p_value, float p_istart, float p_istop, float p_ostart, float p_ostop) { return Math::lerp(p_ostart, p_ostop, Math::inverse_lerp(p_istart, p_istop, p_value)); } return Math::lerp(p_ostart, p_ostop, Math::inverse_lerp(p_istart, p_istop, p_value));
}
static _ALWAYS_INLINE_ float range_lerp(float p_value, float p_istart, float p_istop, float p_ostart, float p_ostop) {
return Math::lerp(p_ostart, p_ostop, Math::inverse_lerp(p_istart, p_istop, p_value));
}
static _ALWAYS_INLINE_ double smoothstep(double p_from, double p_to, double p_s) { static _ALWAYS_INLINE_ double smoothstep(double p_from, double p_to, double p_s) {
if (is_equal_approx(p_from, p_to)) { if (is_equal_approx(p_from, p_to)) {
@ -246,17 +279,33 @@ public:
float s = CLAMP((p_s - p_from) / (p_to - p_from), 0.0f, 1.0f); float s = CLAMP((p_s - p_from) / (p_to - p_from), 0.0f, 1.0f);
return s * s * (3.0f - 2.0f * s); return s * s * (3.0f - 2.0f * s);
} }
static _ALWAYS_INLINE_ double move_toward(double p_from, double p_to, double p_delta) { return abs(p_to - p_from) <= p_delta ? p_to : p_from + SGN(p_to - p_from) * p_delta; } static _ALWAYS_INLINE_ double move_toward(double p_from, double p_to, double p_delta) {
static _ALWAYS_INLINE_ float move_toward(float p_from, float p_to, float p_delta) { return abs(p_to - p_from) <= p_delta ? p_to : p_from + SGN(p_to - p_from) * p_delta; } return abs(p_to - p_from) <= p_delta ? p_to : p_from + SGN(p_to - p_from) * p_delta;
}
static _ALWAYS_INLINE_ float move_toward(float p_from, float p_to, float p_delta) {
return abs(p_to - p_from) <= p_delta ? p_to : p_from + SGN(p_to - p_from) * p_delta;
}
static _ALWAYS_INLINE_ double linear2db(double p_linear) { return Math::log(p_linear) * 8.6858896380650365530225783783321; } static _ALWAYS_INLINE_ double linear2db(double p_linear) {
static _ALWAYS_INLINE_ float linear2db(float p_linear) { return Math::log(p_linear) * (float)8.6858896380650365530225783783321; } return Math::log(p_linear) * 8.6858896380650365530225783783321;
}
static _ALWAYS_INLINE_ float linear2db(float p_linear) {
return Math::log(p_linear) * (float)8.6858896380650365530225783783321;
}
static _ALWAYS_INLINE_ double db2linear(double p_db) { return Math::exp(p_db * 0.11512925464970228420089957273422); } static _ALWAYS_INLINE_ double db2linear(double p_db) {
static _ALWAYS_INLINE_ float db2linear(float p_db) { return Math::exp(p_db * (float)0.11512925464970228420089957273422); } return Math::exp(p_db * 0.11512925464970228420089957273422);
}
static _ALWAYS_INLINE_ float db2linear(float p_db) {
return Math::exp(p_db * (float)0.11512925464970228420089957273422);
}
static _ALWAYS_INLINE_ double round(double p_val) { return ::round(p_val); } static _ALWAYS_INLINE_ double round(double p_val) {
static _ALWAYS_INLINE_ float round(float p_val) { return ::roundf(p_val); } return ::round(p_val);
}
static _ALWAYS_INLINE_ float round(float p_val) {
return ::roundf(p_val);
}
static _ALWAYS_INLINE_ int64_t wrapi(int64_t value, int64_t min, int64_t max) { static _ALWAYS_INLINE_ int64_t wrapi(int64_t value, int64_t min, int64_t max) {
int64_t range = max - min; int64_t range = max - min;
@ -284,12 +333,18 @@ public:
static void randomize(); static void randomize();
static uint32_t rand_from_seed(uint64_t *seed); static uint32_t rand_from_seed(uint64_t *seed);
static uint32_t rand(); static uint32_t rand();
static _ALWAYS_INLINE_ double randd() { return (double)rand() / (double)Math::RANDOM_32BIT_MAX; } static _ALWAYS_INLINE_ double randd() {
static _ALWAYS_INLINE_ float randf() { return (float)rand() / (float)Math::RANDOM_32BIT_MAX; } return (double)rand() / (double)Math::RANDOM_32BIT_MAX;
}
static _ALWAYS_INLINE_ float randf() {
return (float)rand() / (float)Math::RANDOM_32BIT_MAX;
}
static double random(double from, double to); static double random(double from, double to);
static float random(float from, float to); static float random(float from, float to);
static real_t random(int from, int to) { return (real_t)random((real_t)from, (real_t)to); } static real_t random(int from, int to) {
return (real_t)random((real_t)from, (real_t)to);
}
static _ALWAYS_INLINE_ bool is_equal_approx_ratio(real_t a, real_t b, real_t epsilon = CMP_EPSILON, real_t min_epsilon = CMP_EPSILON) { static _ALWAYS_INLINE_ bool is_equal_approx_ratio(real_t a, real_t b, real_t epsilon = CMP_EPSILON, real_t min_epsilon = CMP_EPSILON) {
// this is an approximate way to check that numbers are close, as a ratio of their average size // this is an approximate way to check that numbers are close, as a ratio of their average size