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Remove dependency on undefined behaviour (#24159)

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See https://stackoverflow.com/a/4328396
Previous method works but is technically illegal.
This commit is contained in:
Ujp8LfXBJ6wCPR
2020-02-16 13:22:36 +01:00
committed by GitHub
parent 54fb7a25ed
commit b089ed3b75
1 changed files with 11 additions and 14 deletions
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25
src/common/Collision/BoundingIntervalHierarchy.h
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@@ -29,29 +29,26 @@
#include <algorithm>
#include <limits>
#include <cmath>
#include "string.h"
#define MAX_STACK_SIZE 64
// https://stackoverflow.com/a/4328396
static inline uint32 floatToRawIntBits(float f)
{
union
{
uint32 ival;
float fval;
} temp;
temp.fval=f;
return temp.ival;
static_assert(sizeof(float) == sizeof(uint32), "Size of uint32 and float must be equal for this to work");
uint32 ret;
memcpy(&ret, &f, sizeof(float));
return ret;
}
static inline float intBitsToFloat(uint32 i)
{
union
{
uint32 ival;
float fval;
} temp;
temp.ival=i;
return temp.fval;
static_assert(sizeof(float) == sizeof(uint32), "Size of uint32 and float must be equal for this to work");
float ret;
memcpy(&ret, &i, sizeof(uint32));
return ret;
}
struct AABound