adding hash function

1 files changed, 28 insertions, 0 deletions

diff --git a/rotord/rotor.h b/rotord/rotor.h
index f27d99d..ed566c7 100755
--- a/rotord/rotor.h
+++ b/rotord/rotor.h
@@ -599,6 +599,34 @@ namespace Rotor {
 				return 0.0f;
 			}
 	};
+	//pseudo random repeatable hash function
+	//http://create.stephan-brumme.com/fnv-hash/
+	const uint32_t Prime = 0x01000193; //   16777619
+	const uint32_t Seed  = 0x811C9DC5; // 2166136261
+	class Random: public Signal_node {
+		public:
+			Random(){};
+			Random(map<string,string> &settings) {
+				base_settings(settings);
+				seed=ofToFloat(find_setting(settings,"amount"));
+				for (auto p:parameter_inputs){
+					if (p->parameter=="seed") p->receiver=&seed;
+				}
+				key=0xffffffff;
+			};
+			Random* clone(map<string,string> &_settings) { return new Random(_settings);};
+			const float output(const Time_spec &time) {
+			    if (inputs.size()) { //there should there be a way to specify number of inputs in the code rather than in xml
+                    if (inputs[0]->connection) {
+                    	return 0.0f;
+                        //return (((Signal_node*)inputs[0]->connection)->get_output(time))/divide_amount;
+                    }
+			    }
+				return 0.0f;
+			}
+			float seed;
+			uint32_t key;
+	};
 	class Signal_output: public Signal_node {
 		public:
 			Signal_output(){};