math module

1 files changed, 64 insertions, 0 deletions

diff --git a/src/math/functions.cc b/src/math/functions.cc
new file mode 100644
index 0000000..0e394c1
--- /dev/null
+++ b/src/math/functions.cc
@@ -0,0 +1,64 @@
+/*
+   common/functions.cc
+   This file is part of the Osirion project and is distributed under 
+   the terms of the GNU General Public License version 2 
+*/
+
+// project headers
+#include "math/functions.h"
+
+namespace math {
+
+float min(float a, float b) {
+	return (a < b ? a : b);
+}
+
+float max(float a, float b) {
+	return (a > b ? a : b);
+}
+
+int min(int a, int b) {
+	return (a < b ? a : b);
+}
+
+int max(int a, int b) {
+	return (a > b ? a : b);
+}
+
+float randomf(const float max) {
+	return ((float) rand() / (float) RAND_MAX) * max;
+}
+
+unsigned randomi(const unsigned int max) {
+	return ((unsigned int)(rand() % max));
+}
+
+float degrees180f(float angle) {	
+	float r = angle;
+	while (r <= -180.0f)
+		r += 360.0f;
+	while (r >= 180.0f)
+		r -= 360.0f;
+	return r;
+}
+
+float degrees360f(float angle) {	
+	float r = angle;
+	while (r < 0.0f)
+		r += 360.0f;
+	while (r >= 360.0f)
+		r -= 360.0f;
+	return r;
+}
+
+float sgnf(float value)
+{
+	if (value < 0 )
+		return -1;
+	else if (value == 0 )
+		return 0;
+
+	return 1;
+}
+
+} // namespace math