From 4628d357704565af5d0a1273a7f8d42d2fa27daa Mon Sep 17 00:00:00 2001
From: Fisch <interfisch@gmx.net>
Date: Wed, 5 Jun 2019 01:54:20 +0200
Subject: [PATCH] add persistancemodes

---
 achterbahn.ino | 42 ++++++++++++++++++++++++++++++++++++++++--
 wagon.cpp      | 10 +---------
 2 files changed, 41 insertions(+), 11 deletions(-)

diff --git a/achterbahn.ino b/achterbahn.ino
index 16f87cd..eac2242 100644
--- a/achterbahn.ino
+++ b/achterbahn.ino
@@ -14,6 +14,7 @@
 #include "fx_scanner.h"
 #include "fx_flash.h"
 
+
 #define PIN D2
 #define NUMPIXELS 600
 
@@ -51,6 +52,15 @@ uint8_t wagoncount=0;
 
 Effect* effect = NULL;
 
+//Persistance effects
+#define PERSMODE_BLACK 0
+#define PERSMODE_FADEPERCENT 1
+#define NUM_PERSMODE 2 //number of available persistancemodes
+uint8_t persistancemode=PERSMODE_BLACK;
+long last_changePersistancemode=0;
+#define PERSISTANCEMODECHANGE_DELAY 180000
+
+
 
 //define config
 //#define RESPAWNWAGON
@@ -410,8 +420,36 @@ void loop_achterbahn(){
     lastPixelUpdate=loopmillis;
 
     for (int i=0;i<NUMPIXELS;i++){ //all black
-      uint32_t c=strip.Color(0,0,0);
-      strip.setPixelColor(i,c);
+      
+      switch (persistancemode){ 
+        case PERSMODE_FADEPERCENT:
+        {
+          uint32_t _pxcolor=strip.getPixelColor(i); //get current color of that pixel
+          uint8_t _pxr = _pxcolor >> 16;
+          uint8_t _pxg = _pxcolor >> 8;
+          uint8_t _pxb = _pxcolor;
+          
+          uint32_t c=strip.Color(_pxr*0.99,_pxg*0.99,_pxb*0.99);
+          strip.setPixelColor(i,c);
+          break;
+        }
+        case PERSMODE_BLACK: default:
+        {
+          uint32_t c=strip.Color(0,0,0);
+          strip.setPixelColor(i,c);
+          break;
+        }
+      }
+    }
+
+    //possible persistancemode change
+    if (millis()>last_changePersistancemode+PERSISTANCEMODECHANGE_DELAY) { 
+      if (random(0,10)!=0){
+        persistancemode = PERSMODE_BLACK;
+      }else{
+        persistancemode=random(1,NUM_PERSMODE);
+      }
+      last_changePersistancemode = millis();
     }
 
     //Wagons
diff --git a/wagon.cpp b/wagon.cpp
index 2830113..e5c3fe5 100644
--- a/wagon.cpp
+++ b/wagon.cpp
@@ -305,15 +305,7 @@ void Wagon::updateGraphics()
     _tmpr=(uint16_t)(min(255,_tmpr*_brightnesscorrection));
     _tmpg=(uint16_t)(min(255,_tmpg*_brightnesscorrection));
     _tmpb=(uint16_t)(min(255,_tmpb*_brightnesscorrection));
-    /*if (_tmpr>255){ //clamp
-      _tmpr=255;
-    }
-    if (_tmpg>255){
-      _tmpg=255;
-    }
-    if (_tmpb>255){
-      _tmpb=255;
-    }*/
+
     _strip->setPixelColor(iCorrected,_tmpr,_tmpg,_tmpb); //draw pixel
   }
 }