108 lines
3.1 KiB
Plaintext
108 lines
3.1 KiB
Plaintext
{
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"name": "scratches",
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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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"angle": 0,
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"layers": 5,
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"length": 0.25,
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"randomness": 0.3,
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"waviness": 0.3,
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"width": 0.4
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},
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"shader_model": {
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"code": "",
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"longdesc": "Draws white scratches on a black background",
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"global": "float scratch(vec2 uv, vec2 size, float waviness, float angle, float randomness, vec2 seed) {\n\tfloat subdivide = floor(1.0/size.x);\n\tfloat cut = size.x*subdivide;\n\tuv *= subdivide;\n\tvec2 r1 = rand2(floor(uv)+seed);\n\tvec2 r2 = rand2(r1);\n\tuv = fract(uv);\n\tvec2 border = 10.0*min(fract(uv), 1.0-fract(uv));\n\tuv = 2.0*uv-vec2(1.0);\n\tfloat a = 6.28318530718*(angle+(r1.x-0.5)*randomness);\n\tfloat c = cos(a);\n\tfloat s = sin(a);\n\tuv = vec2(c*uv.x+s*uv.y, s*uv.x-c*uv.y);\n\tuv.y += 2.0*r1.y-1.0;\n\tuv.y += 0.5*waviness*cos(2.0*uv.x+6.28318530718*r2.y);\n\tuv.x /= cut;\n\tuv.y /= subdivide*size.y;\n\treturn min(border.x, border.y)*(1.0-uv.x*uv.x)*max(0.0, 1.0-1000.0*uv.y*uv.y);\n}\n\nfloat scratches(vec2 uv, int layers, vec2 size, float waviness, float angle, float randomness, vec2 seed) {\n\tfloat v = 0.0;\n\tfor (int i = 0; i < layers; ++i) {\n\t\tseed = rand2(seed);\n\t\tv = max(v, scratch(fract(uv+seed), size, waviness, angle/360.0, randomness, seed));\n\t}\n\treturn v;\n}\n",
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"inputs": [
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],
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"instance": "",
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"name": "Scratches",
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"outputs": [
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{
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"f": "scratches($uv, int($layers), vec2($length, $width), $waviness, $angle, $randomness, vec2(float($seed), 0.0))",
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"longdesc": "Shows white scratches on a black background",
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"shortdesc": "Output",
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"type": "f"
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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": 0.25,
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"label": "Length",
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"longdesc": "The length of scratches (the shorter the scratches,the more they will be)",
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"max": 1,
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"min": 0.1,
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"name": "length",
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"shortdesc": "Length",
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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": "Width",
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"longdesc": "The width of scratches",
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"max": 1,
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"min": 0.1,
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"name": "width",
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"shortdesc": "Width",
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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": 4,
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"label": "Layers",
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"longdesc": "The number of scratches layers",
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"max": 10,
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"min": 1,
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"name": "layers",
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"shortdesc": "Layers",
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"step": 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": 0.5,
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"label": "Waviness",
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"longdesc": "The waviness of scratches",
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"max": 1,
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"min": 0,
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"name": "waviness",
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"shortdesc": "Waviness",
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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": "Angle",
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"longdesc": "The average angle of the scratches (0 generates horizontal scratches)",
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"max": 180,
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"min": -180,
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"name": "angle",
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"shortdesc": "Angle",
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"step": 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": 0.5,
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"label": "Randomness",
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"longdesc": "The randomness of the scratches angles",
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"max": 1,
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"min": 0,
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"name": "randomness",
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"shortdesc": "Randomness",
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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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} |