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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
}
}
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