VisualShaderNodeColorFunc

const (
	/*Converts the color to grayscale using the following formula:
	  [codeblock]
	  vec3 c = input;
	  float max1 = max(c.r, c.g);
	  float max2 = max(max1, c.b);
	  float max3 = max(max1, max2);
	  return vec3(max3, max3, max3);
	  [/codeblock]*/
	FuncGrayscale Function = 0
	/*Converts HSV vector to RGB equivalent.*/
	FuncHsv2rgb Function = 1
	/*Converts RGB vector to HSV equivalent.*/
	FuncRgb2hsv Function = 2
	/*Applies sepia tone effect using the following formula:
	  [codeblock]
	  vec3 c = input;
	  float r = (c.r * 0.393) + (c.g * 0.769) + (c.b * 0.189);
	  float g = (c.r * 0.349) + (c.g * 0.686) + (c.b * 0.168);
	  float b = (c.r * 0.272) + (c.g * 0.534) + (c.b * 0.131);
	  return vec3(r, g, b);
	  [/codeblock]*/
	FuncSepia Function = 3
	/*Converts color from linear color space to sRGB color space using the following formula:
	  [codeblock]
	  vec3 c = clamp(c, vec3(0.0), vec3(1.0));
	  const vec3 a = vec3(0.055f);
	  return mix((vec3(1.0f) + a) * pow(c.rgb, vec3(1.0f / 2.4f)) - a, 12.92f * c.rgb, lessThan(c.rgb, vec3(0.0031308f)));
	  [/codeblock]
	  The Compatibility renderer uses a simpler formula:
	  [codeblock]
	  vec3 c = input;
	  return max(vec3(1.055) * pow(c, vec3(0.416666667)) - vec3(0.055), vec3(0.0));
	  [/codeblock]*/
	FuncLinearToSrgb Function = 4
	/*Converts color from sRGB color space to linear color space using the following formula:
	  [codeblock]
	  vec3 c = input;
	  return mix(pow((c.rgb + vec3(0.055)) * (1.0 / (1.0 + 0.055)), vec3(2.4)), c.rgb * (1.0 / 12.92), lessThan(c.rgb, vec3(0.04045)));
	  [/codeblock]
	  The Compatibility renderer uses a simpler formula:
	  [codeblock]
	  vec3 c = input;
	  return c * (c * (c * 0.305306011 + 0.682171111) + 0.012522878);
	  [/codeblock]*/
	FuncSrgbToLinear Function = 5
	/*Represents the size of the [enum Function] enum.*/
	FuncMax Function = 6
)