1 files changed, 27 insertions, 0 deletions
diff --git a/util.cpp b/util.cpp
new file mode 100644
index 0000000..69faa31
--- /dev/null
+++ b/util.cpp
@@ -0,0 +1,27 @@
+#include "util.h"
+
+float flopow(float b, float e)
+{
+	return (b>=0.0) ? (powf(b,e)) : (-powf(-b,e));
+}
+
+Mat circle_mat(int radius)
+{
+  Mat result(radius*2+1, radius*2+1, CV_8U);
+  for (int x=0; x<=result.cols/2; x++)
+    for (int y=0; y<=result.rows/2; y++)
+    {
+      unsigned char& p1 = result.at<unsigned char>(result.cols/2 + x, result.rows/2 + y);
+      unsigned char& p2 = result.at<unsigned char>(result.cols/2 - x, result.rows/2 + y);
+      unsigned char& p3 = result.at<unsigned char>(result.cols/2 + x, result.rows/2 - y);
+      unsigned char& p4 = result.at<unsigned char>(result.cols/2 - x, result.rows/2 - y);
+      
+      if ( x*x + y*y < radius*radius )
+        p1=p2=p3=p4=255;
+      else
+        p1=p2=p3=p4=0;
+    }
+    
+  return result;
+}
+