static void SetColorForIndices(HeroPixel pixelStrip, uint aColor, uint[] indices)
{
foreach (uint index in indices)
{
pixelStrip.setColor(aColor, index, 1);
}
}
public void RunForever()
{
/* get an X,Y, and btn value. These could come from potentiometers for example, or USB gamepad */
Microsoft.SPOT.Hardware.AnalogInput aiBtn = new Microsoft.SPOT.Hardware.AnalogInput(CTRE.HERO.IO.Port1.Analog_Pin3);
Microsoft.SPOT.Hardware.AnalogInput aiX = new Microsoft.SPOT.Hardware.AnalogInput(CTRE.HERO.IO.Port1.Analog_Pin4);
Microsoft.SPOT.Hardware.AnalogInput aiY = new Microsoft.SPOT.Hardware.AnalogInput(CTRE.HERO.IO.Port1.Analog_Pin5);
/* loop forever */
while (true)
{
/* loop sleep */
Thread.Sleep(5);
/* get x,y, and button */
bool btn = aiBtn.Read() < 0.5f;
float x = (float)aiX.Read() * 2f - 1f; // [-1,1]
float y = (float)aiY.Read() * 2f - 1f; // [-1,1]
x = Deadband(x);
y = Deadband(y);
/* figure out next color based on current mode */
if (_colorWheelMode)
{
/* spin around the top circular slice of an HSV surface,
* https://en.wikipedia.org/wiki/HSL_and_HSV */
/* calc sat and hue, use 100% for value */
float hueDeg = 0;
if (y != 0 || x != 0)
{
hueDeg = (float)System.Math.Atan2(y, x) * 180f / (float)System.Math.PI;
/* keep the angle positive */
if (hueDeg < 0)
{
hueDeg += 360f;
}
}
float sat = (float)System.Math.Sqrt(x * x + y * y);
float value = 1f;
/* convert to rgb */
uint color;
uint r, g, b;
HsvToRgb.Convert(hueDeg, sat, value, out r, out g, out b);
color = r;
color <<= 8;
color |= g;
color <<= 8;
color |= b;
/* set all LEDs to one color, controlled by analog signals */
_heroPixels.setColor(color, 0, _heroPixels.NumberPixels);
}
else
{
/* just ramp through the predetermined color sequence */
uint color = _colorSequence[_colIdx];
_heroPixels.setColor(color, _pixelIdx, 1);
}
/* update LEDs using SPI*/
_heroPixels.writeOutput();
/* iterate to next pixel */
if (++_pixelIdx >= _heroPixels.NumberPixels)
{
/* back to first pixel */
_pixelIdx = 0;
/* step to next color when using the predetermined sequence */
if (++_colIdx >= _colorSequence.Length)
{
_colIdx = 0;
}
}
/* detect on-press event on button to change mode. */
if (btn && !_lastBtn)
{
_colorWheelMode = !_colorWheelMode;
}
_lastBtn = btn;
}
}