void UKismetMathLibrary::RGBToHSV(const FLinearColor InColor, float& H, float& S, float& V, float& A)
{
const FLinearColor HSV(InColor.LinearRGBToHSV());
H = HSV.R;
S = HSV.G;
V = HSV.B;
A = HSV.A;
}
FLinearColor FLinearColor::LerpUsingHSV( const FLinearColor& From, const FLinearColor& To, const float Progress )
{
const FLinearColor FromHSV = From.LinearRGBToHSV();
const FLinearColor ToHSV = To.LinearRGBToHSV();
float FromHue = FromHSV.R;
float ToHue = ToHSV.R;
// Take the shortest path to the new hue
if( FMath::Abs( FromHue - ToHue ) > 180.0f )
{
if( ToHue > FromHue )
{
FromHue += 360.0f;
}
else
{
ToHue += 360.0f;
}
}
float NewHue = FMath::Lerp( FromHue, ToHue, Progress );
NewHue = FMath::Fmod( NewHue, 360.0f );
if( NewHue < 0.0f )
{
NewHue += 360.0f;
}
const float NewSaturation = FMath::Lerp( FromHSV.G, ToHSV.G, Progress );
const float NewValue = FMath::Lerp( FromHSV.B, ToHSV.B, Progress );
FLinearColor Interpolated = FLinearColor( NewHue, NewSaturation, NewValue ).HSVToLinearRGB();
const float NewAlpha = FMath::Lerp( From.A, To.A, Progress );
Interpolated.A = NewAlpha;
return Interpolated;
}
void UKismetMathLibrary::RGBToHSV_Vector(const FLinearColor RGB, FLinearColor& HSV)
{
HSV = RGB.LinearRGBToHSV();
}