diff options
Diffstat (limited to 'libs/libc')
| -rw-r--r-- | libs/libc/inc/math.h | 7 | ||||
| -rw-r--r-- | libs/libc/math.c | 26 |
2 files changed, 31 insertions, 2 deletions
diff --git a/libs/libc/inc/math.h b/libs/libc/inc/math.h index 4a38c5f..813ebf1 100644 --- a/libs/libc/inc/math.h +++ b/libs/libc/inc/math.h @@ -19,9 +19,14 @@ f32 powf(f32 base, f32 exp); f64 pow(f64 base, f64 exp); -f32 sqrtf(f64 num); +f32 sqrtf(f32 num); f64 sqrt(f64 num); +f32 lerpf(f32 from, f32 to, f32 trans); +f64 lerp(f64 from, f64 to, f64 trans); +f32 blerpf(f32 a, f32 b, f32 c, f32 d, f32 transx, f32 transy); +f64 blerp(f64 a, f64 b, f64 c, f64 d, f64 transx, f64 transy); + f32 sinf(f32 angle); f64 sin(f64 angle); f32 cosf(f32 angle); diff --git a/libs/libc/math.c b/libs/libc/math.c index 23b1ca4..606281c 100644 --- a/libs/libc/math.c +++ b/libs/libc/math.c @@ -32,7 +32,7 @@ f64 pow(f64 base, f64 exp) // TODO: More efficient sqrt? -f32 sqrtf(f64 num) +f32 sqrtf(f32 num) { return powf(num, .5); } @@ -43,6 +43,30 @@ f64 sqrt(f64 num) } /** + * Interpolations + */ + +f32 lerpf(f32 from, f32 to, f32 trans) +{ + return from + (to - from) * trans; +} + +f64 lerp(f64 from, f64 to, f64 trans) +{ + return from + (to - from) * trans; +} + +f32 blerpf(f32 a, f32 b, f32 c, f32 d, f32 transx, f32 transy) +{ + return lerpf(lerpf(a, b, transx), lerpf(c, d, transx), transy); +} + +f64 blerp(f64 a, f64 b, f64 c, f64 d, f64 transx, f64 transy) +{ + return lerp(lerp(a, b, transx), lerp(c, d, transx), transy); +} + +/** * Trigonometric functions */ |