fix for effect double restart problem when cross-fade is enabled

we only use palette and brightness transitions, so effect restart at the transition end is not required.

Author: softhack007

wled00/FX_fcn.cpp

@@ -494,12 +494,12 @@ void Segment::setCurrentPalette() {
 }
 
 void Segment::handleTransition() {
-  if (!transitional) return;
+  if (!transitional || !_t) return;  // Early exit if no transition active
   unsigned long maxWait = millis() + 20;
   if (mode == FX_MODE_STATIC && next_time > maxWait) next_time = maxWait;
   if (progress() == 0xFFFFU) {
     if (_t) {
-      if (_t->_modeP != mode) markForReset();
+      //if (_t->_modeP != mode) markForReset();  // WLEDMM effect transition disabled as it does not work (flashes due to double effect restart)
       delete _t;
       _t = nullptr;
     }
@@ -618,7 +618,7 @@ void Segment::setMode(uint8_t fx, bool loadDefaults, bool sliderDefaultsOnly) {
           sOpt = extractModeDefaults(fx, "pal");  if (sOpt >= 0) {if (oldPalette==-1) oldPalette = palette; setPalette(sOpt);} else {if (oldPalette!=-1) setPalette(oldPalette); oldPalette = -1;}
         }
       }
-      if (!fadeTransition) markForReset(); // WLEDMM quickfix for effect "double startup" bug. -> only works when "Crossfade" is disabled (led settings)
+      /*if (!fadeTransition)*/ markForReset(); // WLEDMM quickfix for effect "double startup" bug.
       stateChanged = true; // send UDP/WS broadcast
     }
   }

wled00/wled.h

@@ -8,7 +8,7 @@
  */
 
 // version code in format yymmddb (b = daily build)
-#define VERSION 2411270
+#define VERSION 2411271
 
 // WLEDMM  - you can check for this define in usermods, to only enabled WLEDMM specific code in the "right" fork. Its not defined in AC WLED.
 #define _MoonModules_WLED_
@@ -393,7 +393,7 @@ WLED_GLOBAL byte briS     _INIT(128);                     // default brightness
 WLED_GLOBAL byte nightlightTargetBri _INIT(0);      // brightness after nightlight is over
 WLED_GLOBAL byte nightlightDelayMins _INIT(60);
 WLED_GLOBAL byte nightlightMode      _INIT(NL_MODE_FADE); // See const.h for available modes. Was nightlightFade
-WLED_GLOBAL bool fadeTransition      _INIT(false);  // enable crossfading color transition // WLEDMM disabled - has bugs that will be solved in upstream beta4
+WLED_GLOBAL bool fadeTransition      _INIT(true);   // enable crossfading color transition // WLEDMM only do color x-fade -- effect x-fade has bugs that will be solved in upstream beta4
 WLED_GLOBAL uint16_t transitionDelay _INIT(750);    // default crossfade duration in ms
 
 WLED_GLOBAL uint_fast16_t briMultiplier _INIT(100);          // % of brightness to set (to limit power, if you set it to 50 and set bri to 255, actual brightness will be 127)