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[wpilib] Add Color.fromHSV() static helper (#2461)

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Keep AddressableLEDBuffer.setHSV() implementation separate in Java
for performance reasons.
This commit is contained in:
Prateek Machiraju
2020-04-06 02:08:52 -04:00
committed by GitHub
parent e504b3ecbd
commit cb51029335
3 changed files with 75 additions and 33 deletions
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35
wpilibc/src/main/native/cpp/AddressableLED.cpp
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@@ -1,5 +1,5 @@
/*----------------------------------------------------------------------------*/
/* Copyright (c) 2019 FIRST. All Rights Reserved. */
/* Copyright (c) 2019-2020 FIRST. All Rights Reserved. */
/* Open Source Software - may be modified and shared by FRC teams. The code */
/* must be accompanied by the FIRST BSD license file in the root directory of */
/* the project. */
@@ -94,36 +94,5 @@ void AddressableLED::Stop() {
}
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;
}
SetLED(Color::FromHSV(h, s, v));
}