added example files

Makefile

@@ -12,6 +12,12 @@ hpprp: hpprp.c config.c collide.c
 collide.c: rules.txt scripts/rules_gen.py
 	python scripts/rules_gen.py rules.txt collide.c
 
+rules.txt: rules.txt.example
+	if [ -f rules.txt ] ; then echo "rules.txt exists, not overriding" ; touch rules.txt ; else echo "rules.txt does not exist, create from rules.txt.example" ; cp rules.txt.example rules.txt ; fi
+
+config.c: config.c.example
+	if [ -f config.c ] ; then echo "config.c exists, not overriding" ; touch config.c ; else echo "config.c does not exist, create from config.c.example" ; cp config.c.example config.c ; fi
+
 density/density.avi:
 	scripts/image_gen.sh density density/density.avi
 

config.c.example

+// USER CONFIGURATION FILE
+
+#define THREADS 4
+
+// Main properties
+#define WIDTH 1000
+#define HEIGHT 1000
+#define ITERS 1000
+#define SAVE_PERIOD 25
+#define AVERAGING_RADIUS 5
+
+// Field initialization
+void init()
+{
+	fill(0, 0, HEIGHT, WIDTH,	// area
+		0.7, 0.7, 0.7, 0.7,	// move
+		0.25, 0.0, 0.0, 0.0);	// rest
+}
+
+// Sources rules
+void sources(int iter)
+{
+	if (iter==0) {
+		fill(0, WIDTH/2-5, HEIGHT, WIDTH/2+5,	// area
+			1.0, 1.0, 1.0, 1.0,	// move
+			0.75, 0.0, 0.0, 0.0); // rest
+	}
+}
+

rules.txt.example

+        5	10	16
+5	0.33333	0.33333	0.33334
+10	0.33333	0.33333	0.33334
+16	0.33333	0.33333	0.33334
+
+
+	15	21	26
+15	0.33333	0.33333	0.33334
+21	0.33333	0.33333	0.33334
+26	0.33333	0.33333	0.33334
+	    
+        7	18	
+7	0.1	0.9	
+18	0.9	0.1	
+	    
+	11	17	
+11	0.9	0.1	
+17	0.1	0.9	
+	    
+        13	24	
+13	0.1	0.9	
+24	0.9	0.1	
+	    
+        14	20	
+14	0.9	0.1	
+20	0.1	0.9	
+