More work

1 files changed, 41 insertions, 0 deletions

diff --git a/utils.c b/utils.c
new file mode 100644
index 0000000..dfa9a3b
--- /dev/null
+++ b/utils.c
@@ -0,0 +1,41 @@
+#include "utils.h"
+
+//Signum function
+#ifdef WIN32
+_inline int sign(float i)
+#else
+inline int sign(float i)
+#endif
+{
+    if (i<0)
+        return -1;
+    if (i>0)
+        return 1;
+    return 0;
+}
+
+#ifdef WIN32
+_inline unsigned clamp_flt(float f, float min, float max)
+#else
+inline unsigned clamp_flt(float f, float min, float max)
+#endif
+{
+    if(f<min)
+        return 0;
+    if(f>max)
+        return 255;
+    return (int)(255.0f*(f-min)/(max-min));
+}
+
+#ifdef WIN32
+_inline float restrict_flt(float f, float min, float max)
+#else
+inline float restrict_flt(float f, float min, float max)
+#endif
+{
+    if(f<min)
+        return min;
+    if(f>max)
+        return max;
+    return f;
+}
\ No newline at end of file