2019-09-10 22:51:49 +02:00
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{"name":"shape","node_position":{"x":0,"y":0},"parameters":{"edge":0.2,"radius":1,"shape":0,"sides":3},"shader_model":{"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","instance":"","name":"Shape","outputs":[{"f":"shape_$(shape)($(uv), $(sides), $(radius), $(edge))"}],"parameters":[{"default":0,"label":"","name":"shape","type":"enum","values":[{"name":"Circle","value":"circle"},{"name":"Polygon","value":"polygon"},{"name":"Star","value":"star"},{"name":"Curved star","value":"curved_star"},{"name":"Rays","value":"rays"}]},{"default":3,"label":"","max":32,"min":2,"name":"sides","step":1,"type":"float"},{"default":1,"label":"","max":1,"min":0,"name":"radius","step":0,"type":"float"},{"default":0.2,"label":"","max":1,"min":0,"name":"edge","step":0,"type":"float"}]}}
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