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Add HSV helpers to AddressableLED (#2135)

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Also change the setLED() method to setRGB() for consistency and clarity.

Add rainbow example to demonstrate HSV usage.
This commit is contained in:
Austin Shalit
2019-11-29 15:16:57 -08:00
committed by Peter Johnson
parent 5e97c81d80
commit f66ae59992
6 changed files with 202 additions and 45 deletions
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35
wpilibc/src/main/native/cpp/AddressableLED.cpp
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@@ -92,3 +92,38 @@ void AddressableLED::Stop() {
HAL_StopAddressableLEDOutput(m_handle, &status);
wpi_setHALError(status);
}
void AddressableLED::LEDData::SetHSV(int h, int s, int v) {
if (s == 0) {
SetRGB(v, v, v);
return;
}
int region = h / 30;
int remainder = (h - (region * 30)) * 6;
int p = (v * (255 - s)) >> 8;
int q = (v * (255 - ((s * remainder) >> 8))) >> 8;
int t = (v * (255 - ((s * (255 - remainder)) >> 8))) >> 8;
switch (region) {
case 0:
SetRGB(v, t, p);
break;
case 1:
SetRGB(q, v, p);
break;
case 2:
SetRGB(p, v, t);
break;
case 3:
SetRGB(p, q, v);
break;
case 4:
SetRGB(t, p, v);
break;
default:
SetRGB(v, p, q);
break;
}
}

15
wpilibc/src/main/native/include/frc/AddressableLED.h
View File

@@ -35,12 +35,25 @@ class AddressableLED : public ErrorBase {
/**
* A helper method to set all values of the LED.
*
* @param r the r value [0-255]
* @param g the g value [0-255]
* @param b the b value [0-255]
*/
void SetLED(int r, int g, int b) {
void SetRGB(int r, int g, int b) {
this->r = r;
this->g = g;
this->b = b;
}
/**
* A helper method to set all values of the LED.
*
* @param h the h value [0-180]
* @param s the s value [0-255]
* @param v the v value [0-255]
*/
void SetHSV(int h, int s, int v);
};
/**