diff options
Diffstat (limited to 'core/math/math_funcs.h')
| -rw-r--r-- | core/math/math_funcs.h | 63 |
1 files changed, 36 insertions, 27 deletions
diff --git a/core/math/math_funcs.h b/core/math/math_funcs.h index 9f8d4da5b3..c0d7649b65 100644 --- a/core/math/math_funcs.h +++ b/core/math/math_funcs.h @@ -5,8 +5,8 @@ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ -/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */ -/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */ +/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ @@ -46,7 +46,8 @@ class Math { public: Math() {} // useless to instance - static const uint64_t RANDOM_MAX = 0xFFFFFFFF; + // Not using 'RANDOM_MAX' to avoid conflict with system headers on some OSes (at least NetBSD). + static const uint64_t RANDOM_32BIT_MAX = 0xFFFFFFFF; static _ALWAYS_INLINE_ double sin(double p_x) { return ::sin(p_x); } static _ALWAYS_INLINE_ float sin(float p_x) { return ::sinf(p_x); } @@ -102,6 +103,9 @@ public: static _ALWAYS_INLINE_ double log(double p_x) { return ::log(p_x); } static _ALWAYS_INLINE_ float log(float p_x) { return ::logf(p_x); } + static _ALWAYS_INLINE_ double log2(double p_x) { return ::log2(p_x); } + static _ALWAYS_INLINE_ float log2(float p_x) { return ::log2f(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); } @@ -197,19 +201,36 @@ public: value += 0.0; return value; } - static _ALWAYS_INLINE_ int posmod(int p_x, int p_y) { - int value = p_x % p_y; + static _ALWAYS_INLINE_ float fposmodp(float p_x, float p_y) { + float value = Math::fmod(p_x, p_y); + if (value < 0) { + value += p_y; + } + value += 0.0; + return value; + } + static _ALWAYS_INLINE_ double fposmodp(double p_x, double p_y) { + double value = Math::fmod(p_x, p_y); + if (value < 0) { + value += p_y; + } + value += 0.0; + return value; + } + + static _ALWAYS_INLINE_ int64_t posmod(int64_t p_x, int64_t p_y) { + int64_t value = p_x % p_y; if ((value < 0 && p_y > 0) || (value > 0 && p_y < 0)) { value += p_y; } return value; } - static _ALWAYS_INLINE_ double deg2rad(double p_y) { return p_y * Math_PI / 180.0; } - static _ALWAYS_INLINE_ float deg2rad(float p_y) { return p_y * Math_PI / 180.0; } + static _ALWAYS_INLINE_ double deg2rad(double p_y) { return p_y * (Math_PI / 180.0); } + static _ALWAYS_INLINE_ float deg2rad(float p_y) { return p_y * (Math_PI / 180.0); } - static _ALWAYS_INLINE_ double rad2deg(double p_y) { return p_y * 180.0 / Math_PI; } - static _ALWAYS_INLINE_ float rad2deg(float p_y) { return p_y * 180.0 / Math_PI; } + static _ALWAYS_INLINE_ double rad2deg(double p_y) { return p_y * (180.0 / Math_PI); } + static _ALWAYS_INLINE_ float rad2deg(float p_y) { return p_y * (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_ float lerp(float p_from, float p_to, float p_weight) { return p_from + (p_to - p_from) * p_weight; } @@ -274,7 +295,7 @@ public: static double ease(double p_x, double p_c); static int step_decimals(double p_step); static int range_step_decimals(double p_step); - static double stepify(double p_value, double p_step); + static double snapped(double p_value, double p_step); static double dectime(double p_value, double p_amount, double p_step); static uint32_t larger_prime(uint32_t p_val); @@ -283,24 +304,12 @@ public: static void randomize(); static uint32_t rand_from_seed(uint64_t *seed); static uint32_t rand(); - static _ALWAYS_INLINE_ double randd() { return (double)rand() / (double)Math::RANDOM_MAX; } - static _ALWAYS_INLINE_ float randf() { return (float)rand() / (float)Math::RANDOM_MAX; } + static _ALWAYS_INLINE_ double randd() { 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 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 _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 - // helps compare approximate numbers that may be very big or very small - real_t diff = abs(a - b); - if (diff == 0.0 || diff < min_epsilon) { - return true; - } - real_t avg_size = (abs(a) + abs(b)) / 2.0; - diff /= avg_size; - return diff < epsilon; - } + static int random(int from, int to); static _ALWAYS_INLINE_ bool is_equal_approx(real_t a, real_t b) { // Check for exact equality first, required to handle "infinity" values. @@ -466,12 +475,12 @@ public: } static _ALWAYS_INLINE_ float snap_scalar(float p_offset, float p_step, float p_target) { - return p_step != 0 ? Math::stepify(p_target - p_offset, p_step) + p_offset : p_target; + return p_step != 0 ? Math::snapped(p_target - p_offset, p_step) + p_offset : p_target; } static _ALWAYS_INLINE_ float snap_scalar_separation(float p_offset, float p_step, float p_target, float p_separation) { if (p_step != 0) { - float a = Math::stepify(p_target - p_offset, p_step + p_separation) + p_offset; + float a = Math::snapped(p_target - p_offset, p_step + p_separation) + p_offset; float b = a; if (p_target >= 0) { b -= p_separation; |