implement scanner effect

achterbahn.ino

@@ -7,6 +7,7 @@
 
 #include <vector>
 #include "wagon.h"
+#include "fx_scanner.h"
 
 #define PIN D2
 #define NUMPIXELS 600
@@ -39,6 +40,8 @@ int selectedpixel=-1; //-1 = none
 
 uint8_t wagoncount=0;
 
+FX_Scanner effect;
+
 
 //define config
 //#define RESPAWNWAGON
@@ -374,6 +377,9 @@ void checkSerial(){
       }else{
         Serial.println("Error: Value too high!");
       }
+    }else if (serialstring.equals("fx_scanner")){
+      Serial.println("Effect Scanner");
+      effect=FX_Scanner(NUMPIXELS,&strip,height,255,-200,strip.Color(100,0,0));
     }
     
   }
@@ -411,12 +417,18 @@ void loop_achterbahn(){
       strip.setPixelColor(i,c);
     }
 
+    //Wagons
     for (std::vector<Wagon>::iterator it = wagon_arr.begin(); it != wagon_arr.end(); ++it) //all wagons
     {
       Wagon & w = *it;
       w.updateGraphics();
     }
 
+    //Effects
+    if (effect.active()){
+      effect.updateGraphics();
+    }
+
     strip.show();
   }
 
@@ -445,6 +457,11 @@ void loop_achterbahn(){
         wagoncount++;
       }
     }
+
+    //Effects
+    if (effect.active()){
+      effect.updateRoutine(ROUTINEUPDATETIME);
+    }
   }
 
 

achterbahnconfig/achterbahnconfig/achterbahnconfig.pde

@@ -134,6 +134,11 @@ void setup() {
   cp5.addButton("Run")
       .setPosition(10, 240)
       .setSize(100, 30);
+      
+      
+  cp5.addButton("FX_Scanner")
+      .setPosition(200, 200)
+      .setSize(100, 20);
 
     
   myPort = new Serial(this, "/dev/ttyUSB0", 115200);
@@ -176,6 +181,12 @@ void SpawnRandom() {
   myPort.write(writeserial);
 }
 
+
+void FX_Scanner() {
+  String writeserial="fx_scanner\n";
+  myPort.write(writeserial);
+}
+
   
 
 void draw() {

fx_scanner.cpp

@@ -0,0 +1,84 @@
+#include "fx_scanner.h"
+
+FX_Scanner::FX_Scanner(int numpixels,Adafruit_NeoPixel *strip,uint8_t *height,int startpos,float scannervel,uint32_t scannercolor)
+{
+  _numpixels=numpixels;
+  _pos = startpos;
+  _strip=strip;
+  _height=height;
+  _vel=scannervel;
+  _scannercolor=scannercolor;
+}
+
+FX_Scanner::FX_Scanner()
+{
+  _numpixels=0;
+  _pos = -1; //for active false
+  _strip=0;
+  _height=0;
+  _vel=0;
+  _scannercolor=0;
+}
+
+void FX_Scanner::updateRoutine(float updatedelayms)
+{
+  _pos+=_vel*updatedelayms/1000.0;
+}
+
+void FX_Scanner::updateGraphics()
+{
+  #define FEATHERDISTANCE 3 //in both directions
+  for(int i=0;i<_numpixels;i++){
+    float heightdistfromlaser=abs(_height[i]-_pos);
+    if (heightdistfromlaser<=FEATHERDISTANCE) {
+      
+      uint8_t _r = _scannercolor >> 16;
+      uint8_t _g = _scannercolor >> 8;
+      uint8_t _b = _scannercolor;
+
+      float distmult=1.0-(heightdistfromlaser/FEATHERDISTANCE);
+      _r*=distmult;
+      _g*=distmult;
+      _b*=distmult;
+  
+      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;
+      uint16_t _tmpr=_pxr+_r; //add colors
+      uint16_t _tmpg=_pxg+_g;
+      uint16_t _tmpb=_pxb+_b;
+      if (_tmpr>255){ //clamp
+        _tmpr=255;
+      }
+      if (_tmpg>255){
+        _tmpg=255;
+      }
+      if (_tmpb>255){
+        _tmpb=255;
+      }
+      _strip->setPixelColor(i,_tmpr,_tmpg,_tmpb); //draw pixel
+    }
+  }
+}
+
+bool FX_Scanner::active()
+{
+  if (_pos>256 || _pos<0){
+    return false;
+  }
+  return true;
+}
+
+uint32_t FX_Scanner::Wheel(byte WheelPos,float brightness) {
+  WheelPos = 255 - WheelPos;
+  if(WheelPos < 85) {
+    return _strip->Color(255 - WheelPos * 3*brightness, 0, WheelPos * 3*brightness);
+  }
+  if(WheelPos < 170) {
+    WheelPos -= 85;
+    return _strip->Color(0, WheelPos * 3*brightness, 255 - WheelPos * 3*brightness);
+  }
+  WheelPos -= 170;
+  return _strip->Color(WheelPos * 3*brightness, 255 - WheelPos * 3*brightness, 0);
+}

fx_scanner.h

@@ -0,0 +1,26 @@
+#ifndef FX_SCANNER_H
+#define FX_SCANNER_H
+#include <Adafruit_NeoPixel.h>
+#include <math.h>
+
+class FX_Scanner
+{
+  public:
+    FX_Scanner(int numpixels,Adafruit_NeoPixel *strip,uint8_t *height,int startpos,float scannervel,uint32_t scannercolor);
+    FX_Scanner();
+    void updateRoutine(float updatedelayms);
+    void updateGraphics();
+    uint32_t Wheel(byte WheelPos,float brightness);
+    bool active();
+  private:
+    int _numpixels;
+    Adafruit_NeoPixel *_strip;
+    float _pos;
+    float _vel;
+    uint8_t *_height;
+    uint32_t _scannercolor;
+};
+
+#endif
+
+