115 lines
3.6 KiB
Plaintext
115 lines
3.6 KiB
Plaintext
{
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"name": "shape",
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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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"edge": 0.1,
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"radius": 0.8,
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"shape": 1,
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"sides": 6
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},
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"shader_model": {
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"code": "",
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"longdesc": "A node that draws a white shape on a black background",
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"global": "float shape_circle(vec2 uv, float sides, float size, float edge) {\n uv = 2.0*uv-1.0;\n\tedge = max(edge, 1.0e-8);\n float distance = length(uv);\n return clamp((1.0-distance/size)/edge, 0.0, 1.0);\n}\n\nfloat shape_polygon(vec2 uv, float sides, float size, float edge) {\n uv = 2.0*uv-1.0;\n\tedge = max(edge, 1.0e-8);\n float angle = atan(uv.x, uv.y)+3.14159265359;\n float slice = 6.28318530718/sides;\n return clamp((size-cos(floor(0.5+angle/slice)*slice-angle)*length(uv))/(edge*size), 0.0, 1.0);\n}\n\nfloat shape_star(vec2 uv, float sides, float size, float edge) {\n uv = 2.0*uv-1.0;\n\tedge = max(edge, 1.0e-8);\n float angle = atan(uv.x, uv.y);\n float slice = 6.28318530718/sides;\n return clamp((size-cos(floor(1.5+angle/slice-2.0*step(0.5*slice, mod(angle, slice)))*slice-angle)*length(uv))/(edge*size), 0.0, 1.0);\n}\n\nfloat shape_curved_star(vec2 uv, float sides, float size, float edge) {\n uv = 2.0*uv-1.0;\n\tedge = max(edge, 1.0e-8);\n float angle = 2.0*(atan(uv.x, uv.y)+3.14159265359);\n float slice = 6.28318530718/sides;\n return clamp((size-cos(floor(0.5+0.5*angle/slice)*2.0*slice-angle)*length(uv))/(edge*size), 0.0, 1.0);\n}\n\nfloat shape_rays(vec2 uv, float sides, float size, float edge) {\n uv = 2.0*uv-1.0;\n\tedge = 0.5*max(edge, 1.0e-8)*size;\n\tfloat slice = 6.28318530718/sides;\n float angle = mod(atan(uv.x, uv.y)+3.14159265359, slice)/slice;\n return clamp(min((size-angle)/edge, angle/edge), 0.0, 1.0);\n}\n\n",
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"inputs": [
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{
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"default": "1.0",
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"label": "3:",
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"longdesc": "An input map that affects the shape size",
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"name": "radius_map",
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"shortdesc": "Size map",
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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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"label": "",
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"longdesc": "An input map that affects the edge width",
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"name": "edge_map",
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"shortdesc": "Edge map",
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"type": "f"
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}
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],
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"instance": "",
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"name": "Shape",
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"outputs": [
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{
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"f": "shape_$(shape)($(uv), $(sides), $(radius)*$radius_map($uv), $(edge)*$edge_map($uv))",
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"longdesc": "Shows a white shape 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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"default": 0,
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"label": "",
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"longdesc": "The type of shape drawn by this node",
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"name": "shape",
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"shortdesc": "Shape",
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"type": "enum",
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"values": [
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{
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"name": "Circle",
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"value": "circle"
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},
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{
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"name": "Polygon",
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"value": "polygon"
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},
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{
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"name": "Star",
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"value": "star"
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},
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{
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"name": "Curved star",
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"value": "curved_star"
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},
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{
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"name": "Rays",
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"value": "rays"
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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": 3,
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"label": "",
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"longdesc": "The number of sides of the generated shape (unused for Circle)",
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"max": 32,
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"min": 2,
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"name": "sides",
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"shortdesc": "Sides 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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"control": "None",
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"default": 1,
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"label": "",
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"longdesc": "The size of the generated shape",
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"max": 1,
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"min": 0,
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"name": "radius",
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"shortdesc": "Shape size",
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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": 0.2,
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"label": "",
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"longdesc": "The edge width of the generated shape",
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"max": 1,
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"min": 0,
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"name": "edge",
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"shortdesc": "Edge 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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},
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"type": "shader"
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} |