c++ Fade between colors? (Arduino)

Question

I currently have this thats fading between 2 set colours:

for(int i=0;i

        

Answer 1

It's impossible to fade to pink beacuse you are starting from red and ending with green.

To avoid this kind of mistake I suggest you to write an object oriented code.

If you don't want to write the classes to handle a 3D vectonr you can use the Arduino Tinker Library

I wrote this example for you:

#include 
#include 

Tinker::Vect3d red(255,0,0);
Tinker::Vect3d green(0,255,0);
Tinker::SerialLog serialLog;

void setup(){
  Serial.begin(9600);
  serialLog.display("Fade color example");  
  serialLog.endline();
}

void loop(){
  //fade factor computation
  const uint32_t t   = millis()%10000;
  const float cosArg = t/10000.*3.1415*2;
  const float fade   = abs(cos(cosArg));

  //Here's the color computation... as you can see is very easy to do!! :)
  Tinker::Vect3d finalColor(red*fade + green*(1-fade));

  //We print the vect3d on the arduino serial port
  Tinker::LOG::displayVect3d(finalColor,&serialLog);
  serialLog.endline();
  delay(500);
}

Which prints the following output on the serial port

Fade color example
V[255;0;0]
V[242;12;0]
V[206;48;0]
V[149;105;0]
V[78;176;0]
V[0;254;0]
V[79;175;0]
V[150;104;0]
V[206;48;0]
V[242;12;0]
V[254;0;0]
V[242;12;0]
V[205;49;0]
V[148;106;0]
V[77;177;0]
V[1;253;0]
V[80;174;0]
V[151;103;0]

hope that this helps :)