+init

1 files changed, 21 insertions, 0 deletions

diff --git a/src/math/math.c b/src/math/math.c
new file mode 100644
index 0000000..4cca29e
--- /dev/null
+++ b/src/math/math.c
@@ -0,0 +1,21 @@
+#include "math.h"
+
+char printbuffer[2048] = { 0 };
+
+float rsqrt(float number) {
+	long i;
+	float x2, y;
+	const float threehalfs = 1.5F;
+
+	x2 = number * 0.5F;
+	y = number;
+	i = *(long *)&y;
+	i = 0x5f3759df - (i >> 1);
+	y = *(float *)&i;
+	y = y * (threehalfs - (x2 * y * y));
+	return y;
+}
+
+float lerp(float a, float b, float t) {
+	return a * (1 - t) + b * t;
+}
\ No newline at end of file