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Core: Replace C math headers with C++ equivalents

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- Minor restructuring to ensure `math_funcs.h` is the central point for math functions
This commit is contained in:
Thaddeus Crews 2025-03-19 14:18:09 -05:00
parent c5c1cd4440
commit ad40939b6f
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GPG key ID: 8C6E5FEB5FC03CCC
101 changed files with 414 additions and 498 deletions
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22
core/math/random_pcg.h
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@ -30,12 +30,10 @@
#pragma once
#include "core/math/math_defs.h"
#include "core/math/math_funcs.h"
#include "thirdparty/misc/pcg.h"
#include <math.h>
#if defined(__GNUC__)
#define CLZ32(x) __builtin_clz(x)
#elif defined(_MSC_VER)
@ -46,16 +44,6 @@ static int __bsr_clz32(uint32_t x) {
return 31 - index;
}
#define CLZ32(x) __bsr_clz32(x)
#else
#endif
#if defined(__GNUC__)
#define LDEXP(s, e) __builtin_ldexp(s, e)
#define LDEXPF(s, e) __builtin_ldexpf(s, e)
#else
#include <math.h>
#define LDEXP(s, e) ldexp(s, e)
#define LDEXPF(s, e) ldexp(s, e)
#endif
template <typename T>
@ -110,7 +98,7 @@ public:
return 0;
}
uint64_t significand = (((uint64_t)rand()) << 32) | rand() | 0x8000000000000001U;
return LDEXP((double)significand, -64 - CLZ32(proto_exp_offset));
return std::ldexp((double)significand, -64 - CLZ32(proto_exp_offset));
#else
#pragma message("RandomPCG::randd - intrinsic clz is not available, falling back to bit truncation")
return (double)(((((uint64_t)rand()) << 32) | rand()) & 0x1FFFFFFFFFFFFFU) / (double)0x1FFFFFFFFFFFFFU;
@ -122,7 +110,7 @@ public:
if (unlikely(proto_exp_offset == 0)) {
return 0;
}
return LDEXPF((float)(rand() | 0x80000001), -32 - CLZ32(proto_exp_offset));
return std::ldexp((float)(rand() | 0x80000001), -32 - CLZ32(proto_exp_offset));
#else
#pragma message("RandomPCG::randf - intrinsic clz is not available, falling back to bit truncation")
return (float)(rand() & 0xFFFFFF) / (float)0xFFFFFF;
@ -134,14 +122,14 @@ public:
if (temp < CMP_EPSILON) {
temp += CMP_EPSILON; // To prevent generating of INF value in log function, resulting to return NaN value from this function.
}
return p_mean + p_deviation * (cos(Math::TAU * randd()) * sqrt(-2.0 * log(temp))); // Box-Muller transform.
return p_mean + p_deviation * (std::cos(Math::TAU * randd()) * std::sqrt(-2.0 * std::log(temp))); // Box-Muller transform.
}
_FORCE_INLINE_ float randfn(float p_mean, float p_deviation) {
float temp = randf();
if (temp < CMP_EPSILON) {
temp += CMP_EPSILON; // To prevent generating of INF value in log function, resulting to return NaN value from this function.
}
return p_mean + p_deviation * (cos((float)Math::TAU * randf()) * sqrt(-2.0 * log(temp))); // Box-Muller transform.
return p_mean + p_deviation * (std::cos((float)Math::TAU * randf()) * std::sqrt(-2.0 * std::log(temp))); // Box-Muller transform.
}
double random(double p_from, double p_to);