material-maker/addons/material_maker/examples/mandelbrot.ptex

{
	"connections": [
		{
			"from": "custom_0",
			"from_port": 0,
			"to": "colorize_0",
			"to_port": 0
		},
		{
			"from": "colorize_0",
			"from_port": 0,
			"to": "Material",
			"to_port": 3
		}
	],
	"label": "Graph",
	"name": "362",
	"node_position": {
		"x": 0,
		"y": 0
	},
	"nodes": [
		{
			"name": "Material",
			"node_position": {
				"x": 200,
				"y": 0
			},
			"parameters": {
				"albedo_color": {
					"a": 1,
					"b": 0,
					"g": 0,
					"r": 0,
					"type": "Color"
				},
				"ao_light_affect": 1,
				"depth_scale": 1,
				"emission_energy": 1,
				"metallic": 1,
				"normal_scale": 1,
				"resolution": 1,
				"roughness": 1,
				"size": 11
			},
			"type": "material"
		},
		{
			"name": "custom_0",
			"node_position": {
				"x": -211,
				"y": 208
			},
			"parameters": {
				"contrast": 10,
				"scale": 1,
				"x": 0,
				"y": 0
			},
			"shader_model": {
				"global": "float mandelbrot(vec2 uv) {\n    float di =  1.0;\n    vec2 z  = vec2(0.0);\n    float m2 = 0.0;\n    vec2 dz = vec2(0.0);\n    for( int i=0; i<200; i++ )\n    {\n        if (m2>1024.0 ) {\n\t\t\tdi=0.0;\n\t\t\tbreak;\n\t\t}\n\n\t\t// Z' -> 2·Z·Z' + 1\n        dz = 2.0*vec2(z.x*dz.x-z.y*dz.y, z.x*dz.y + z.y*dz.x) + vec2(1.0,0.0);\n\t\t\t\n        // Z -> Z² + c\t\t\t\n        z = vec2( z.x*z.x - z.y*z.y, 2.0*z.x*z.y ) + uv;\n\t\t\t\n        m2 = dot(z,z);\n    }\n\n    // distance\t\n\t// d(c) = |Z|·log|Z|/|Z'|\n\tfloat d = 0.5*sqrt(dot(z,z)/dot(dz,dz))*log(dot(z,z));\n    if( di>0.5 ) d=0.0;\n\treturn d;\n}",
				"instance": "float $(name)_xyz(vec2 uv) {\n\treturn mandelbrot(uv);\n}",
				"name": "Mandelbrot",
				"outputs": [
					{
						"f": "clamp($(name)_xyz(vec2($(x), $(y))+$(scale)*(2.0*$(uv)-1.0))*$(contrast), 0.0, 1.0)",
						"type": "f"
					}
				],
				"parameters": [
					{
						"label": "Scale",
						"max": 3,
						"min": 0,
						"name": "scale",
						"step": 0.0001,
						"type": "float",
						"widget": "spinbox"
					},
					{
						"label": "X",
						"max": 2,
						"min": -2,
						"name": "x",
						"step": 0.0001,
						"type": "float",
						"widget": "spinbox"
					},
					{
						"label": "Y",
						"max": 2,
						"min": -2,
						"name": "y",
						"step": 0.0001,
						"type": "float",
						"widget": "spinbox"
					},
					{
						"label": "Contrast",
						"max": 10000,
						"min": 1,
						"name": "contrast",
						"step": 0.0001,
						"type": "float",
						"widget": "spinbox"
					}
				]
			},
			"type": "shader"
		},
		{
			"name": "colorize_0",
			"node_position": {
				"x": -99.75,
				"y": -7.25
			},
			"parameters": {
				"gradient": {
					"points": [
						{
							"a": 1,
							"b": 0,
							"g": 0,
							"pos": 0,
							"r": 1
						},
						{
							"a": 1,
							"b": 0,
							"g": 0.96875,
							"pos": 0.2,
							"r": 1
						},
						{
							"a": 1,
							"b": 0.0625,
							"g": 1,
							"pos": 0.4,
							"r": 0
						},
						{
							"a": 1,
							"b": 1,
							"g": 1,
							"pos": 0.618182,
							"r": 0
						},
						{
							"a": 1,
							"b": 0.965909,
							"g": 0,
							"pos": 0.818182,
							"r": 0
						},
						{
							"a": 1,
							"b": 1,
							"g": 0,
							"pos": 1,
							"r": 0.9375
						}
					],
					"type": "Gradient"
				}
			},
			"type": "colorize"
		}
	],
	"parameters": {

	},
	"type": "graph"
}