RGB和HSV互相转换c++的代码

以下是RGB和HSV互相转换的C++代码：

#include <iostream>
#include <cmath>

using namespace std;

void rgbToHsv(float r, float g, float b, float& h, float& s, float& v) {
    float cmax = max(max(r, g), b);
    float cmin = min(min(r, g), b);
    float delta = cmax - cmin;
    if (delta == 0) {
        h = 0;
    } else if (cmax == r) {
        h = 60 * fmod((g - b) / delta, 6);
    } else if (cmax == g) {
        h = 60 * ((b - r) / delta + 2);
    } else {
        h = 60 * ((r - g) / delta + 4);
    }
    if (cmax == 0) {
        s = 0;
    } else {
        s = delta / cmax;
    }
    v = cmax;
}

void hsvToRgb(float h, float s, float v, float& r, float& g, float& b) {
    int i = floor(h / 60.0);
    float f = h / 60.0 - i;
    float p = v * (1 - s);
    float q = v * (1 - f * s);
    float t = v * (1 - (1 - f) * s);
    switch (i) {
        case 0:
            r = v; g = t; b = p;
            break;
        case 1:
            r = q; g = v; b = p;
            break;
        case 2:
            r = p; g = v; b = t;
            break;
        case 3:
            r = p; g = q; b = v;
            break;
        case 4:
            r = t; g = p; b = v;
            break;
        default:
            r = v; g = p; b = q;
            break;
    }
}

int main() {
    float r = 0.5f, g = 0.5f, b = 0.5f; // RGB值
    float h, s, v;
    rgbToHsv(r, g, b, h, s, v);
    cout << "RGB(" << r << ", " << g << ", " << b << ") -> "
         << "HSV(" << h << ", " << s << ", " << v << ")" << endl;
    hsvToRgb(h, s, v, r, g, b);
    cout << "HSV(" << h << ", " << s << ", " << v << ") -> "
         << "RGB(" << r << ", " << g << ", " << b << ")" << endl;
    return 0;
}

其中，`rgbToHsv`函数用于将RGB值转换为HSV值，`hsvToRgb`函数用于将HSV值转换为RGB值。在主函数中，我们可以测试转换结果。