Added Vogel disk screenshot

Author: corporateshark

README.md

@@ -10,7 +10,7 @@ http://blog.linderdaum.com
 
 =============================
 
-Poisson disk points generator in a single file header-only C++11 library.
+Poisson disk & Vogel disk points generator in a single file header-only C++11 library.
 
 =============================
 
@@ -24,7 +24,7 @@ CMake:
 
 Demo app usage:
 
-	Poisson [density-map-rgb24.bmp] [--raw-points] [--num-points=<value>] [--square]
+	Poisson [density-map-rgb24.bmp] [--raw-points] [--num-points=<value>] [--square] [--vogel-disk]
 
 =============================
 
@@ -35,6 +35,18 @@ Implementation is based on http://devmag.org.za/2009/05/03/poisson-disk-sampling
 
 =============================
 
-![alt tag](https://camo.githubusercontent.com/d2c51f5ef0b0644378910f2c58e3e29c3e297ab7/687474703a2f2f626c6f672e6c696e6465726461756d2e636f6d2f696d616765732f506f6973736f6e5f4469736b2e706e67)
-![alt tag](https://camo.githubusercontent.com/bfd11990fb6d6050d372fc251c2a161344016175/687474703a2f2f626c6f672e6c696e6465726461756d2e636f6d2f696d616765732f506f6973736f6e5f526563742e706e67)
-![alt tag](https://camo.githubusercontent.com/82a7c564779471147872bfd35ee0c246b11eb8c3/687474703a2f2f626c6f672e6c696e6465726461756d2e636f6d2f696d616765732f506f6973736f6e5f526563745f44656e736974792e706e67)
+Poisson disk
+
+![Poisson disk](https://camo.githubusercontent.com/d2c51f5ef0b0644378910f2c58e3e29c3e297ab7/687474703a2f2f626c6f672e6c696e6465726461756d2e636f6d2f696d616765732f506f6973736f6e5f4469736b2e706e67)
+
+Poisson rectangle
+
+![Poisson rectange](https://camo.githubusercontent.com/bfd11990fb6d6050d372fc251c2a161344016175/687474703a2f2f626c6f672e6c696e6465726461756d2e636f6d2f696d616765732f506f6973736f6e5f526563742e706e67)
+
+Poisson rectangle with custom density map
+
+![Poisson rectangle with custom density map](https://camo.githubusercontent.com/82a7c564779471147872bfd35ee0c246b11eb8c3/687474703a2f2f626c6f672e6c696e6465726461756d2e636f6d2f696d616765732f506f6973736f6e5f526563745f44656e736974792e706e67)
+
+Vogel disk
+
+![Vogel disk](https://user-images.githubusercontent.com/2510143/144725686-59f31ade-8ddf-4461-9e18-eda0a7cd3146.png)