83 lines
2.0 KiB
Plaintext
83 lines
2.0 KiB
Plaintext
{
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"name": "sdarc",
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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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"a1": 30,
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"a2": 150,
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"r1": 0.3,
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"r2": 0.1
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},
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"shader_model": {
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"code": "",
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"global": "float sdArc(vec2 p, float a1, float a2, float ra, float rb) {\n\tfloat amid = 0.5*(a1+a2)+1.6+3.14*step(a1, a2);\n\tfloat alength = 0.5*(a1-a2)-1.6+3.14*step(a1, a2);\n\tvec2 sca = vec2(cos(amid), sin(amid));\n\tvec2 scb = vec2(cos(alength), sin(alength));\n p *= mat2(vec2(sca.x,sca.y),vec2(-sca.y,sca.x));\n p.x = abs(p.x);\n float k = (scb.y*p.x>scb.x*p.y) ? dot(p.xy,scb) : length(p.xy);\n return sqrt( dot(p,p) + ra*ra - 2.0*ra*k ) - rb;\n}\n",
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"inputs": [
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],
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"instance": "",
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"longdesc": "An arc as a signed distance function",
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"name": "sdArc",
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"outputs": [
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{
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"longdesc": "The arc as a signed distance function",
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"sdf2d": "sdArc($uv-vec2(0.5), mod($a1, 360.0)*0.01745329251, mod($a2, 360.0)*0.01745329251, $r1, $r2)",
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"shortdesc": "Output",
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"type": "sdf2d"
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}
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],
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"parameters": [
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{
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"control": "Angle1.a",
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"default": 0,
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"label": "Angle 1",
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"longdesc": "The first angle of the arc",
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"max": 180,
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"min": -180,
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"name": "a1",
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"shortdesc": "Angle1",
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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": "Angle2.a",
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"default": 0,
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"label": "Angle 2",
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"longdesc": "The second angle of the arc",
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"max": 180,
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"min": -180,
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"name": "a2",
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"shortdesc": "Angle2",
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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": "Radius1.r",
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"default": 0.5,
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"label": "Radius",
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"longdesc": "The radius of the arc",
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"max": 1,
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"min": 0,
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"name": "r1",
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"shortdesc": "Radius",
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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": "Radius11.r",
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"default": 0.1,
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"label": "Width",
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"longdesc": "The width of the shape around the arc",
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"max": 1,
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"min": 0,
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"name": "r2",
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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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"shortdesc": "sdArc"
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},
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"type": "shader"
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} |