154 lines
4.1 KiB
Plaintext
154 lines
4.1 KiB
Plaintext
{
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"name": "splatter",
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"node_position": {
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"x": 0,
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"y": 0
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},
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"parameters": {
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"count": 25,
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"rotate": 0,
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"scale": 0,
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"scale_x": 1,
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"scale_y": 1,
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"select_inputs": 0,
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"value": 0
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},
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"shader_model": {
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"code": "vec4 $(name_uv)_rch = splatter_$(name)($uv, int($count), vec2(float($seed)));",
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"longdesc": "A node that spreads several occurences of an input image randomly.",
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"global": "",
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"inputs": [
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{
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"default": "0.0",
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"function": true,
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"label": "",
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"longdesc": "The input image or atlas of 4 or 16 input images",
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"name": "in",
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"shortdesc": "Input",
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"type": "f"
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},
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{
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"default": "1.0",
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"function": true,
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"label": "",
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"longdesc": "The mask applied to the pattern",
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"name": "mask",
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"shortdesc": "Mask",
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"type": "f"
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}
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],
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"instance": "vec4 splatter_$(name)(vec2 uv, int count, vec2 seed) {\n\tfloat c = 0.0;\n\tvec3 rc = vec3(0.0);\n\tvec3 rc1;\n\tfor (int i = 0; i < count; ++i) {\n\t\tseed = rand2(seed);\n\t\trc1 = rand3(seed);\n\t\tfloat mask = $mask(fract(seed+vec2(0.5)));\n\t\tif (mask > 0.01) {\n\t\t\tvec2 pv = fract(uv - seed)-vec2(0.5);\n\t\t\tseed = rand2(seed);\n\t\t\tfloat angle = (seed.x * 2.0 - 1.0) * $rotate * 0.01745329251;\n\t\t\tfloat ca = cos(angle);\n\t\t\tfloat sa = sin(angle);\n\t\t\tpv = vec2(ca*pv.x+sa*pv.y, -sa*pv.x+ca*pv.y);\n\t\t\tpv *= (seed.y-0.5)*2.0*$scale+1.0;\n\t\t\tpv /= vec2($scale_x, $scale_y);\n\t\t\tpv += vec2(0.5);\n\t\t\tpv = clamp(pv, vec2(0.0), vec2(1.0));\n\t\t\t$select_inputs\n\t\t\tseed = rand2(seed);\n\t\t\tfloat c1 = $in(pv)*mask*(1.0-$value*seed.x);\n\t\t\tc = max(c, c1);\n\t\t\trc = mix(rc, rc1, step(c, c1));\n\t\t}\n\t}\n\treturn vec4(rc, c);\n}\n",
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"name": "Splatter",
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"outputs": [
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{
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"f": "$(name_uv)_rch.a",
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"longdesc": "Shows the generated pattern",
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"shortdesc": "Output",
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"type": "f"
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},
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{
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"longdesc": "Shows a random color for each instance of the input image",
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"rgb": "$(name_uv)_rch.rgb",
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"shortdesc": "Instance map",
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"type": "rgb"
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}
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],
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"parameters": [
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{
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"control": "None",
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"default": 10,
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"label": "Count",
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"longdesc": "The number of occurences of the input image",
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"max": 100,
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"min": 1,
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"name": "count",
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"shortdesc": "Count",
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"step": 1,
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"type": "float"
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},
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{
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"default": 0,
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"label": "Inputs",
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"longdesc": "The input type of the node:\n- 1: single image\n- 4: atlas of 4 images\n- 16: atlas of 16 images\nAtlases can be created using the Tile2x2 node.",
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"name": "select_inputs",
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"shortdesc": "Input",
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"type": "enum",
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"values": [
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{
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"name": "1",
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"value": " "
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},
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{
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"name": "4",
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"value": "pv = clamp(0.5*(pv+floor(rand2(seed)*2.0)), vec2(0.0), vec2(1.0));"
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},
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{
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"name": "16",
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"value": "pv = clamp(0.25*(pv+floor(rand2(seed)*4.0)), vec2(0.0), vec2(1.0));"
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}
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]
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},
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{
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"control": "None",
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"default": 1,
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"label": "Scale X",
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"longdesc": "The scale of input images on the X axis",
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"max": 2,
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"min": 0,
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"name": "scale_x",
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"shortdesc": "Scale.x",
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"step": 0.01,
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"type": "float"
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},
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{
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"control": "None",
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"default": 1,
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"label": "Scale Y",
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"longdesc": "The scale of input images on the Y axis",
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"max": 2,
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"min": 0,
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"name": "scale_y",
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"shortdesc": "Scale.y",
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"step": 0.01,
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"type": "float"
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},
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{
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"control": "None",
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"default": 0,
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"label": "Rnd Rotate",
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"longdesc": "The random rotation applied to each image instance",
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"max": 180,
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"min": 0,
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"name": "rotate",
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"shortdesc": "RndRotate",
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"step": 0.1,
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"type": "float"
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},
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{
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"control": "None",
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"default": 0,
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"label": "Rnd Scale",
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"longdesc": "The random scale applied to each image instance",
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"max": 1,
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"min": 0,
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"name": "scale",
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"shortdesc": "RndScale",
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"step": 0.01,
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"type": "float"
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},
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{
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"control": "None",
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"default": 0.5,
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"label": "Rnd Value",
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"longdesc": "The random greyscale value applied to each image instance",
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"max": 1,
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"min": 0,
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"name": "value",
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"shortdesc": "RndValue",
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"step": 0.01,
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"type": "float"
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}
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]
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},
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"type": "shader"
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} |