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

{
	"name": "voronoi",
	"node_position": {
		"x": 0,
		"y": 0
	},
	"parameters": {
		"intensity": 1,
		"randomness": 0.66,
		"scale_x": 4,
		"scale_y": 4,
		"stretch_x": 1,
		"stretch_y": 1
	},
	"shader_model": {
		"code": "vec4 $(name_uv)_xyzw = voronoi($uv, vec2($scale_x, $scale_y), vec2($stretch_y, $stretch_x), $intensity, $randomness, $seed);",
		"global": "vec4 voronoi(vec2 uv, vec2 size, vec2 stretch, float intensity, float randomness, int seed) {\n\tvec2 seed2 = rand2(vec2(float(seed), 1.0-float(seed)));\n    uv *= size;\n    float best_distance0 = 1.0;\n    float best_distance1 = 1.0;\n    vec2 point0;\n    vec2 point1;\n    vec2 p0 = floor(uv);\n    for (int dx = -1; dx < 2; ++dx) {\n    \tfor (int dy = -1; dy < 2; ++dy) {\n            vec2 d = vec2(float(dx), float(dy));\n            vec2 p = p0+d;\n            p += randomness*rand2(seed2+mod(p, size));\n            float distance = length(stretch*(uv - p) / size);\n            if (best_distance0 > distance) {\n            \tbest_distance1 = best_distance0;\n            \tbest_distance0 = distance;\n                point1 = point0;\n                point0 = p;\n            } else if (best_distance1 > distance) {\n            \tbest_distance1 = distance;\n                point1 = p;\n            }\n        }\n    }\n    float edge_distance = dot(uv - 0.5*(point0+point1), normalize(point0-point1));\n    \n    return vec4(point0, best_distance0*length(size)*intensity, edge_distance);\n}\n",
		"inputs": [

		],
		"instance": "",
		"longdesc": "A node that generates several images from a tileable voronoi noise",
		"name": "Voronoi",
		"outputs": [
			{
				"f": "$(name_uv)_xyzw.z",
				"longdesc": "A greyscale pattern based on the distance to cell centers",
				"shortdesc": "Nodes",
				"type": "f"
			},
			{
				"f": "$(name_uv)_xyzw.w",
				"longdesc": "A greyscale pattern based on the distance to borders",
				"shortdesc": "Borders",
				"type": "f"
			},
			{
				"longdesc": "A color pattern that assigns a random color to each cell",
				"rgb": "rand3(fract($(name_uv)_xyzw.xy))",
				"shortdesc": "Random color",
				"type": "rgb"
			},
			{
				"longdesc": "An output that should be plugged into a Fill companion node",
				"rgba": "vec4(fract(($(name_uv)_xyzw.xy-0.5)/vec2($scale_x, $scale_y)), vec2(1.0)/vec2($scale_x, $scale_y))",
				"shortdesc": "Fill",
				"type": "rgba"
			}
		],
		"parameters": [
			{
				"control": "None",
				"default": 4,
				"label": "Scale X",
				"longdesc": "The scale along the X axis",
				"max": 32,
				"min": 1,
				"name": "scale_x",
				"shortdesc": "Scale.x",
				"step": 1,
				"type": "float"
			},
			{
				"control": "None",
				"default": 4,
				"label": "Scale Y",
				"longdesc": "The scale along the Y axis",
				"max": 32,
				"min": 1,
				"name": "scale_y",
				"shortdesc": "Scale.y",
				"step": 1,
				"type": "float"
			},
			{
				"control": "None",
				"default": 1,
				"label": "Stretch X",
				"longdesc": "The stretch factor along the X axis",
				"max": 1,
				"min": 0.01,
				"name": "stretch_x",
				"shortdesc": "Stretch.x",
				"step": 0.01,
				"type": "float"
			},
			{
				"control": "None",
				"default": 1,
				"label": "Stretch Y",
				"longdesc": "The stretch factor along the Y axis",
				"max": 1,
				"min": 0.01,
				"name": "stretch_y",
				"shortdesc": "Stretch.y",
				"step": 0.01,
				"type": "float"
			},
			{
				"control": "None",
				"default": 0.75,
				"label": "Intensity",
				"longdesc": "A value factor for greyscale outputs",
				"max": 1,
				"min": 0,
				"name": "intensity",
				"shortdesc": "Intensity",
				"step": 0.01,
				"type": "float"
			},
			{
				"control": "None",
				"default": 1,
				"label": "Randomness",
				"longdesc": "The randomness of cell centers positions",
				"max": 1,
				"min": 0,
				"name": "randomness",
				"shortdesc": "Randomness",
				"step": 0.01,
				"type": "float"
			}
		],
		"shortdesc": "Voronoi Noise"
	},
	"type": "shader"
}