48 lines
921 B
C
48 lines
921 B
C
#include "global.h"
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f32 sFactorialTbl[] = { 1.0f, 1.0f, 2.0f, 6.0f, 24.0f, 120.0f, 720.0f,
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5040.0f, 40320.0f, 362880.0f, 3628800.0f, 39916800.0f, 479001600.0f };
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f32 Math_FactorialF(f32 n) {
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f32 ret = 1.0f;
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s32 i;
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for (i = n; i > 1; i--) {
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ret *= i;
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}
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return ret;
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}
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f32 Math_Factorial(s32 n) {
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f32 ret;
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s32 i;
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if ((u32)n > 12U) {
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ret = sFactorialTbl[12];
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for (i = 13; i <= n; i++) {
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ret *= i;
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}
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} else {
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ret = sFactorialTbl[n];
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}
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return ret;
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}
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f32 Math_PowF(f32 base, s32 exp) {
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f32 ret = 1.0f;
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while (exp > 0) {
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exp--;
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ret *= base;
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}
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return ret;
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}
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f32 Math_SinF(f32 angle) {
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return sins((s16)(angle * (32767.0f / M_PI))) * SHT_MINV;
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}
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f32 Math_CosF(f32 angle) {
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return coss((s16)(angle * (32767.0f / M_PI))) * SHT_MINV;
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}
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