From 78dd62283baf54ac8dd376762c60a06ec247c89d Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Wed, 30 May 2018 14:34:48 +1000
Subject: [PATCH] extent: add uniform sampler

---
 extent.hpp | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/extent.hpp b/extent.hpp
index 79556dfe..14e4ebd3 100644
--- a/extent.hpp
+++ b/extent.hpp
@@ -21,6 +21,7 @@
 #include "coord/base.hpp"
 #include "vector.hpp"
 #include "point.hpp"
+#include "random.hpp"
 
 #include <cstddef>
 
@@ -165,6 +166,25 @@ namespace util {
     };
 
 
+    template <size_t S, typename T>
+    util::point<S,T>
+    sample (util::extent<S,T> shape)
+    {
+        return sample (shape, util::random::generator ());
+    }
+
+
+    template <size_t S, typename T, typename GeneratorT>
+    util::point<S,T>
+    sample (util::extent<S,T> shape, GeneratorT &&gen)
+    {
+        util::point<S,T> p;
+        for (size_t i = 0; i < S; ++i)
+            p[i] = util::random::uniform (0, shape[i], gen);
+        return p;
+    }
+
+
     ///////////////////////////////////////////////////////////////////////////
     // convenience typedefs
     template <typename T> using extent2 = extent<2,T>;