43 lines
1.4 KiB
Plaintext
43 lines
1.4 KiB
Plaintext
{
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"name": "raymarching",
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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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},
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"shader_model": {
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"code": "vec2 $(name_uv)_d = raymarch_$name($uv);\n",
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"global": "",
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"inputs": [
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{
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"default": "0.0",
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"function": true,
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"label": "",
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"name": "sdf",
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"type": "sdf3dc"
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}
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],
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"instance": "vec2 raymarch_$name(vec2 uv) {\n\tvec3 ro = vec3(uv-vec2(0.5), 1.0);\n\tvec3 rd = vec3(0.0, 0.0, -1.0);\n\tfloat dO = 0.0;\n\tfloat c = 0.0;\n for (int i=0; i < 100; i++) {\n \tvec3 p = ro + rd*dO;\n vec2 dS = $sdf(p);\n dO += dS.x;\n\n if (dO >= 1.0) {\n\t\t\tbreak;\n\t\t} else if (dS.x < 0.0001) {\n\t\t\tc = dS.y;\n\t\t\tbreak;\n\t\t}\n }\n \n return vec2(dO, c);\n}\n\nvec3 normal_$name(vec3 p) {\n\tif (p.z <= 0.0) {\n\t\treturn vec3(0.0, 0.0, 1.0);\n\t}\n\n\tfloat d = $sdf(p).x;\n float e = .001;\n \n vec3 n = d - vec3(\n $sdf(p-vec3(e, 0.0, 0.0)).x,\n $sdf(p-vec3(0.0, e, 0.0)).x,\n $sdf(p-vec3(0.0, 0.0, e)).x);\n \n return vec3(-1.0, -1.0, -1.0)*normalize(n);\n}\n\n",
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"name": "Raymarching",
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"outputs": [
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{
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"f": "1.0-$(name_uv)_d.x",
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"type": "f"
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},
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{
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"rgb": "vec3(0.5)+0.5*normal_$name(vec3($uv-vec2(0.5), 1.0-$(name_uv)_d.x))",
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"type": "rgb"
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},
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{
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"f": "$(name_uv)_d.y",
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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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},
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"type": "shader"
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} |