1 files changed, 113 insertions, 0 deletions
diff --git a/Runtime/Graphs/UnityEngine.Graphs/LogicNodeLibrary/Material/MaterialNodes.cs b/Runtime/Graphs/UnityEngine.Graphs/LogicNodeLibrary/Material/MaterialNodes.cs
new file mode 100644
index 0000000..734968b
--- /dev/null
+++ b/Runtime/Graphs/UnityEngine.Graphs/LogicNodeLibrary/Material/MaterialNodes.cs
@@ -0,0 +1,113 @@
+using UnityEngine;
+using System.Collections;
+
+namespace UnityEngine.Graphs.LogicGraph
+{
+	public class MaterialNodes
+	{
+		#if REIMPLEMENT_USING_CLASS_NODES
+		[Logic(typeof(Renderer), typeof(NodeLibrary.StartStopEvents))]
+		public static IEnumerator UVScroll (Renderer self, ByRef<NodeLibrary.StartStopEvents> evt, string property, Vector2 magnitude, float frequency, int mode)
+		{
+			Material mat = self.material;
+			if (property == null || property == "")
+				property = "_MainTex";
+			
+			if (mode == 0)
+			{
+				while (true)
+				{
+					// scroll uv
+					Vector2 uv = mat.GetTextureOffset(property);
+					uv += magnitude * Time.deltaTime;
+					mat.SetTextureOffset(property, uv);
+					
+					// Handle Stop event
+					if (evt.Value == NodeLibrary.StartStopEvents.Stop)
+						break;
+					yield return 0;
+				}
+			}
+			else
+			{
+				// Elapsed time, measured in cycles.
+				float elapsed = 0;
+				
+				Vector2 lastUV = mat.GetTextureOffset(property);
+				
+				float stopElapsed = 0f;
+				bool exit = false;
+				
+				while (true)
+				{
+					// Handle Stop event
+					if (evt.Value == NodeLibrary.StartStopEvents.Stop)
+					{
+						// When stopping, complete the current cycle before really stopping
+						// Update: Actually we only need to complete the current half-cycle
+						// because the cycle always has the same value in the middle as in the beginning and end.
+						if (stopElapsed == 0)
+							stopElapsed = Mathf.Ceil(elapsed * 2) * 0.5f;
+						
+						// When we reach the end of the cycle, stop at the exact time
+						else if (elapsed >= stopElapsed)
+						{
+							elapsed = stopElapsed;
+							exit = true;
+						}
+					}
+					
+					Vector2 uv = Vector2.zero;
+					// Triangle wave (centered around 0)
+					if (mode == 1)
+						uv += magnitude * (Mathf.PingPong(elapsed * 2f + 0.5f, 1) - 0.5f);
+					// Sine wave (centered around 0)
+					if (mode == 2)
+						uv += magnitude * 0.5f * Mathf.Sin(elapsed * 2f * Mathf.PI);
+					
+					mat.SetTextureOffset(property, mat.GetTextureOffset(property) + (uv - lastUV));
+					lastUV = uv;
+					
+					if (exit)
+						break;
+					
+					elapsed += Time.deltaTime * frequency;
+					
+					yield return 0;
+				}
+			}
+			
+		}
+		
+		[Logic(typeof(Renderer), typeof(NodeLibrary.StartStopEvents))]
+		public static IEnumerator UVCycler (Renderer self, ByRef<NodeLibrary.StartStopEvents> evt, string property, int xTiles, int yTiles, float speed)
+		{
+			Material mat = self.material;
+			if (property == null || property == "")
+				property = "_MainTex";
+			
+			// TODO: find out what initial frame is based on uv offset in the beginning?
+			
+			float elapsed = 0;
+			while (true)
+			{
+				int frame = Mathf.FloorToInt(elapsed);
+				
+				float xOffset = frame % xTiles;
+				float yOffset = yTiles - 1 - (frame / xTiles) % yTiles;
+				
+				Vector2 uv = new Vector2(xOffset / xTiles, yOffset / yTiles);
+				mat.SetTextureOffset(property, uv);
+				
+				// Handle Stop event
+				if (evt.Value == NodeLibrary.StartStopEvents.Stop)
+					break;
+				
+				elapsed += Time.deltaTime * speed;
+				
+				yield return 0;
+			}
+		}
+		#endif
+	}
+}