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Use super-simple floor function

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This commit is contained in:
Luke Benstead 2020-02-17 19:02:45 +00:00
parent 6516f0f6f5
commit 93be3ab757
1 changed files with 10 additions and 6 deletions
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16
GL/lighting.c
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@ -278,6 +278,10 @@ GL_FORCE_INLINE float FEXP(float y) {
#define LOGBODGE 0.346607f
#define POWBODGE 0.33971f
GL_FORCE_INLINE float FFLOOR(float x) {
return (int) x - (x < (int) x);
}
GL_FORCE_INLINE float FLOG2(float i) {
float y;
@ -286,19 +290,19 @@ GL_FORCE_INLINE float FLOG2(float i) {
int i;
} x;
x.f = i;
x.i = i;
x.i *= INVSHIFT23;
x.i = x.i - 127;
x.f *= INVSHIFT23;
x.f = x.f - 127;
y = x.i - floorf(x.i);
y = x.f - FFLOOR(x.f);
y = (y - y * y) * LOGBODGE;
return x.i + y;
return x.f + y;
}
GL_FORCE_INLINE float FPOW2(float i) {
float y = i - floorf(i);
float y = i - FFLOOR(i);
y = (y - y * y) * POWBODGE;
union {