Writer character delay counter modification

- more consistent character pacing
- prevents the 1 character per frame limit, fixed by timer increment after return from yield

Assets/Fungus/Scripts/Components/Writer.cs

@@ -495,6 +495,7 @@ namespace Fungus
             UpdateCloseMarkup();
 
             float timeAccumulator = Time.deltaTime;
+            float invWritingSpeed = 1f / currentWritingSpeed;
 
             for (int i = 0; i < param.Length + 1; ++i)
             {
@@ -510,6 +511,7 @@ namespace Fungus
                     yield return null;
                 }
 
+                //actually grab the next chars
                 PartitionString(writeWholeWords, param, i);
                 ConcatenateString(startText);
                 textAdapter.Text = outputString.ToString();
@@ -533,13 +535,19 @@ namespace Fungus
                 // Delay between characters
                 if (currentWritingSpeed > 0f)
                 {
-                    if (timeAccumulator > 0f)
+                    timeAccumulator -= invWritingSpeed;
+                    if (timeAccumulator <= 0f)
                     {
-                        timeAccumulator -= 1f / currentWritingSpeed;
-                    } 
-                    else
-                    {
-                        yield return new WaitForSeconds(1f / currentWritingSpeed);
+                        if (invWritingSpeed > Time.deltaTime)
+                        {
+                            yield return new WaitForSeconds(invWritingSpeed);
+                            timeAccumulator += invWritingSpeed;
+                        }
+                        else
+                        {
+                            yield return null;
+                            timeAccumulator += Time.deltaTime;
+                        }
                     }
                 }
             }