From 5053382808960f3209b3fd217fd6b20b240f0d38 Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Sun, 13 Jun 2021 12:59:45 +0200
Subject: Added image viewer and blerp scaling

---
 libs/libc/math.c | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

(limited to 'libs/libc/math.c')

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);
 }
@@ -42,6 +42,30 @@ f64 sqrt(f64 num)
 	return pow(num, .5);
 }
 
+/**
+ * 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
  */
-- 
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