/// <summary>
/// Generates a texture consisting of a gradient between all hues (a rainbow) in the HSV
/// color system, with maximum saturation and value.
/// </summary>
/// <param name="resolution">Number of pixels for the gradient longest' side.
/// Small values like 16 are usually precise enough with bilinear filtering.
/// The smallest side will always be 1 pixel long.</param>
/// <param name="vertical">Will the texture be generated vertically?</param>
/// <returns></returns>
public static Texture GenerateRainbowGradient(int resolution = 16, bool vertical = true)
{
int width = vertical ? 1 : resolution;
int height = vertical ? resolution : 1;
Texture2D texture = new Texture2D(width, height);
texture.hideFlags = HideFlags.DontSave;
texture.wrapMode = TextureWrapMode.Clamp;
//TODO: Use SetPixels instead of SetPixel, for better performance.
for (int i = 0; i < resolution; i++)
{
float hue = (i / (float)resolution);
Color color = ColorConvert.HSVtoRGB(new HSVValues(hue, 1f, 1f, 1f));
if (vertical)
{
texture.SetPixel(0, i, color);
}
else
{
texture.SetPixel(i, 0, color);
}
}
texture.Apply();
return(texture);
}
/// <summary>
/// Generates a two-dimensional gradient for visualizing all color possibilities
/// in a specific HSV hue. Similar to those used in color pickers.
/// </summary>
/// <param name="hue">The hue for the colors.</param>
/// <param name="resolution">Number of pixels for the gradient sides.
/// Small values like 8 are usually precise enough with bilinear filtering.
/// Be careful, this increases the complexity exponentially.</param>
/// <returns></returns>
public static Texture2D GenerateHSVBox(float hue, int resolution = 8)
{
Texture2D texture = new Texture2D(resolution, resolution);
texture.hideFlags = HideFlags.DontSave;
texture.wrapMode = TextureWrapMode.Clamp;
//TODO: Use SetPixels instead of SetPixel, for better performance.
for (int x = 0; x < resolution; x++)
{
for (int y = 0; y < resolution; y++)
{
float saturation = x / (float)(resolution - 1);
float value = y / (float)(resolution - 1);
texture.SetPixel(x, y, ColorConvert.HSVtoRGB(new HSVValues(hue, saturation, value)));
}
}
texture.Apply();
return(texture);
}
private void SetHSV(HSVValues hsv)
{
SetRGB(ColorConvert.HSVtoRGB(hsv));
}