material-maker/addons/material_maker/nodes/greyscale.mmg

{
	"name": "greyscale",
	"node_position": {
		"x": 0,
		"y": 0
	},
	"parameters": {
		"brightness": 0,
		"contrast": 1,
		"mode": 2,
		"steps": 6
	},
	"shader_model": {
		"code": "",
		"global": "float gs_min(vec3 c) {\n\treturn min(c.r, min(c.g, c.b));\n}\nfloat gs_max(vec3 c) {\n\treturn max(c.r, max(c.g, c.b));\n}\nfloat gs_lightness(vec3 c) {\n\treturn 0.5*(max(c.r, max(c.g, c.b)) + min(c.r, min(c.g, c.b)));\n}\nfloat gs_average(vec3 c) {\n\treturn 0.333333333333*(c.r + c.g + c.b);\n}\nfloat gs_luminosity(vec3 c) {\n\treturn 0.21 * c.r + 0.72 * c.g + 0.07 * c.b;\n}\n",
		"inputs": [
			{
				"default": "vec3(0.0)",
				"label": "",
				"name": "in",
				"type": "rgb"
			}
		],
		"instance": "",
		"name": "Greyscale",
		"outputs": [
			{
				"f": "gs_$mode($in($uv))",
				"type": "f"
			}
		],
		"parameters": [
			{
				"default": 4,
				"label": "",
				"name": "mode",
				"type": "enum",
				"values": [
					{
						"name": "Lightness",
						"value": "lightness"
					},
					{
						"name": "Average",
						"value": "average"
					},
					{
						"name": "Luminosity",
						"value": "luminosity"
					},
					{
						"name": "Min",
						"value": "min"
					},
					{
						"name": "Max",
						"value": "max"
					}
				]
			}
		]
	},
	"type": "shader"
}