Question

假设我有一个随机的RGB值，如240 23 123.好吗？所以我想转换HSV中的RGB值，我需要RGB颜色正好在渐变的中间。所以渐变的所有其他值应该具有更多或更少的饱和度。理想情况下，渐变应始终倾向于白色，与初始RGB值无关。是否有公式或算法来实现这一目标？结果应该是1个梯度的HSV值数组。

Answer 1

如果您希望渐变以白色开始，请转到您的颜色，然后转到黑色，您可以通过多种方式进行操作。这是一种方式：

const int numEntries = 20;
const int halfNumEntries = numEntries / 2;
RGBColor gradient[numEntries];
HSVColor hsv = RGBToHSV (rgb); // Where rgb is the RGB color you start with

// Gradient from white to your color
for (int i = 0; i < halfNumEntries; i++)
{
    float newHue = hsv.hue;
    float newSat = (i / halfNumEntries) * hsv.sat;
    float newVal = 1.0 + (i / halfNumEntries) * (hsv.val - 1.0);
    gradient [ i ] = HSVToRGB (newHue, newSat, newVal);
}

gradient [ halfNumEntries ] = rgb;

// Gradient from your color to black
for (int i = (halfNumEntries + 1); i < numEntries; i++)
{
    float newHue = hsv.hue;
    float newSat = hsv.sat + ((i - halfNumEntries) / (halfNumEntries - 1)) * (0.0 - hsv.sat);
    float newVal = hsv.val + ((i - halfNumEntries) / (halfNumEntries - 1)) * (0.0 - hsv.val);
    gradient [ i ] = HSVToRGB (newHue, newSat, newVal);
}

获取渐变给定颜色，其中颜色位于渐变的中间

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