Update README for cmake

README.md

@@ -52,14 +52,16 @@ python waf configure
 python waf build
 ```
 
+Alternatively, the testbed can be built using cmake. See below.
+
 Running the Examples
 --------------------
 
 Load data points from a file:
 ```
 p2t <filename> <center_x> <center_y> <zoom>
 ```
-Random distribution of points inside a consrained box:
+Random distribution of points inside a constrained box:
 ```
 p2t random <num_points> <box_radius> <zoom>
 ```
@@ -71,3 +73,34 @@ Examples:
 ./build/p2t random 10 100 5.0
 ./build/p2t random 1000 20000 0.025
 ```
+
+BUILD WITH CMAKE
+================
+
+Build the library
+-----------------
+
+```
+mkdir build && cd build
+cmake -GNinja
+cmake --build .
+```
+
+Build and run the unit tests
+----------------------------
+
+```
+mkdir build && cd build
+cmake -GNinja -DP2T_BUILD_TESTS=ON
+cmake --build .
+ctest --output-on-failure
+```
+
+Build the testbed
+-----------------
+
+```
+mkdir build && cd build
+cmake -GNinja -DP2T_BUILD_TESTBED=ON
+cmake --build .
+```