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Merge pull request #123 from Makuna/BiLinearHue

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Added bilinear methods
This commit is contained in:
Michael Miller
2016-08-08 18:14:22 -07:00
committed by GitHub
parent 929d4f7f03 260b67cd0e
commit 95b32de1ef
2 changed files with 60 additions and 0 deletions
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30
src/internal/HsbColor.h
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@ -72,6 +72,36 @@ struct HsbColor
left.B + ((right.B - left.B) * progress));
}
// ------------------------------------------------------------------------
// BilinearBlend between four colors by the amount defined by 2d variable
// c00 - upper left quadrant color
// c01 - upper right quadrant color
// c10 - lower left quadrant color
// c11 - lower right quadrant color
// x - unit value (0.0 - 1.0) that defines the blend progress in horizontal space
// y - unit value (0.0 - 1.0) that defines the blend progress in vertical space
// ------------------------------------------------------------------------
template <typename T_NEOHUEBLEND> static HsbColor BilinearBlend(const HsbColor& c00,
const HsbColor& c01,
const HsbColor& c10,
const HsbColor& c11,
float x,
float y)
{
float v00 = (1.0f - x) * (1.0f - y);
float v10 = x * (1.0f - y);
float v01 = (1.0f - x) * y;
float v11 = x * y;
return HsbColor(
T_NEOHUEBLEND::HueBlend(
T_NEOHUEBLEND::HueBlend(c00.H, c10.H, x),
T_NEOHUEBLEND::HueBlend(c01.H, c11.H, x),
y),
c00.S * v00 + c10.S * v10 + c01.S * v01 + c11.S * v11,
c00.B * v00 + c10.B * v10 + c01.B * v01 + c11.B * v11);
};
// ------------------------------------------------------------------------
// Hue, Saturation, Brightness color members
// ------------------------------------------------------------------------

30
src/internal/HslColor.h
View File

@ -73,6 +73,36 @@ struct HslColor
left.L + ((right.L - left.L) * progress));
};
// ------------------------------------------------------------------------
// BilinearBlend between four colors by the amount defined by 2d variable
// c00 - upper left quadrant color
// c01 - upper right quadrant color
// c10 - lower left quadrant color
// c11 - lower right quadrant color
// x - unit value (0.0 - 1.0) that defines the blend progress in horizontal space
// y - unit value (0.0 - 1.0) that defines the blend progress in vertical space
// ------------------------------------------------------------------------
template <typename T_NEOHUEBLEND> static HslColor BilinearBlend(const HslColor& c00,
const HslColor& c01,
const HslColor& c10,
const HslColor& c11,
float x,
float y)
{
float v00 = (1.0f - x) * (1.0f - y);
float v10 = x * (1.0f - y);
float v01 = (1.0f - x) * y;
float v11 = x * y;
return HslColor(
T_NEOHUEBLEND::HueBlend(
T_NEOHUEBLEND::HueBlend(c00.H, c10.H, x),
T_NEOHUEBLEND::HueBlend(c01.H, c11.H, x),
y),
c00.S * v00 + c10.S * v10 + c01.S * v01 + c11.S * v11,
c00.L * v00 + c10.L * v10 + c01.L * v01 + c11.L * v11);
};
// ------------------------------------------------------------------------
// Hue, Saturation, Lightness color members
// ------------------------------------------------------------------------