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#include "sys.h"
#include "prevent_bss_reordering.h"
s32 sSeededRandSeed3;
s32 sRandSeed1;
s32 sRandSeed2;
s32 sRandSeed3;
s32 sSeededRandSeed1;
s32 sSeededRandSeed2;
f32 Math_ModF(f32 value, f32 mod) {
return value - ((s32) (value / mod) * mod);
}
void Rand_Init(void) {
sRandSeed1 = (s32) osGetTime() % 30000;
sRandSeed2 = (s32) osGetTime() % 30000;
sRandSeed3 = (s32) osGetTime() % 30000;
}
f32 Rand_ZeroOne(void) {
sRandSeed1 = (sRandSeed1 * 171) % 30269;
sRandSeed2 = (sRandSeed2 * 172) % 30307;
sRandSeed3 = (sRandSeed3 * 170) % 30323;
return fabsf(Math_ModF((sRandSeed1 / 30269.0f) + (sRandSeed2 / 30307.0f) + (sRandSeed3 / 30323.0f), 1.0f));
}
void Rand_SetSeed(s32 seed1, s32 seed2, s32 seed3) {
sSeededRandSeed1 = seed1;
sSeededRandSeed2 = seed2;
sSeededRandSeed3 = seed3;
}
f32 Rand_ZeroOneSeeded(void) {
sSeededRandSeed1 = (sSeededRandSeed1 * 171) % 30269;
sSeededRandSeed2 = (sSeededRandSeed2 * 172) % 30307;
sSeededRandSeed3 = (sSeededRandSeed3 * 170) % 30323;
return fabsf(
Math_ModF((sSeededRandSeed1 / 30269.0f) + (sSeededRandSeed2 / 30307.0f) + (sSeededRandSeed3 / 30323.0f), 1.0f));
}
f32 Math_Atan2F(f32 y, f32 x) {
if ((y == 0.0f) && (x == 0.0f)) {
return 0.0f;
}
if (x == 0.0f) {
if (y < 0.0f) {
return -M_PI / 2.0f;
} else {
return M_PI / 2.0f;
}
}
if (x < 0.0f) {
if (y < 0.0f) {
return -(M_PI - Math_FAtanF(fabs(y / x)));
} else {
return M_PI - Math_FAtanF(fabs(y / x));
}
} else {
return Math_FAtanF(y / x);
}
}
f32 Math_Atan2F_XY(f32 x, f32 y) {
if ((x == 0.0f) && (y == 0.0f)) {
return 0.0f;
}
if (x == 0.0f) {
if (y < 0.0f) {
return -M_PI / 2.0f;
} else {
return M_PI / 2.0f;
}
}
if (y == 0.0f) {
if (x > 0.0f) {
return 0.0f;
} else {
return M_PI;
}
}
if (x < 0.0f) {
if (y < 0.0f) {
return -(M_PI - Math_FAtanF(fabs(x / y)));
} else {
return M_PI - Math_FAtanF(fabs(x / y));
}
} else {
return Math_FAtanF(x / y);
}
}
f32 Math_Atan2F_XYAlt(f32 x, f32 y) {
if ((x == 0.0f) && (y == 0.0f)) {
return 0.0f;
}
if (x == 0.0f) {
if (y < 0.0f) {
return -M_PI / 2.0f;
}
return M_PI / 2.0f;
}
if (y == 0.0f) {
return 0.0f;
}
return -Math_FAtanF(x / y);
}
f32 Math_FactorialF(f32 n) {
f32 out = 1.0f;
s32 i;
for (i = (s32) n; i > 1; i--) {
out *= i;
}
return out;
}
f32 D_800C45E0[] = { 1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800, 39916800, 479001600 };
f32 Math_Factorial(s32 n) {
f32 out;
s32 i;
if (n > 12) {
out = 1.0f;
for (i = n; i > 1; i--) {
out *= i;
}
} else {
out = D_800C45E0[n];
}
return out;
}
f32 Math_PowF(f32 base, s32 exp) {
f32 out = 1.0f;
while (exp > 0) {
exp--;
out *= base;
}
return out;
}
void Math_MinMax(s32* min, s32* max, s32 val1, s32 val2, s32 val3) {
if (val1 < val2) {
if (val2 < val3) {
*min = val1;
*max = val3;
return;
}
*max = val2;
if (val1 < val3) {
*min = val1;
return;
}
*min = val3;
return;
}
if (val1 < val3) {
*min = val2;
*max = val3;
return;
}
*max = val1;
if (val2 < val3) {
*min = val2;
return;
}
*min = val3;
}
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