{ "name": "fill_iterate", "node_position": { "x": 0, "y": 0 }, "parameters": { "s": 11 }, "shader_model": { "code": "", "global": "", "inputs": [ { "default": "0.0", "function": true, "label": "", "name": "in", "type": "rgba" } ], "instance": "vec4 $(name)_fill(vec2 uv) {\n\tfloat size = $s;\n\tint iterations = min(int(size), 256);\n\tvec4 color = $in(fract(uv));\n\tif (color.z+color.w < 1.0/size) {\n\t\treturn vec4(0.0);\n\t}\n\tvec2 offsets[8] = { vec2(1.0, 0.0), vec2(-1.0, 0.0), vec2(0.0, 1.0), vec2(0.0, -1.0), vec2(1.0, 1.0), vec2(-1.0, 1.0), vec2(-1.0, 1.0), vec2(-1.0, -1.0) };\n\tfor (int o = 0; o < 8; ++o) {\n\t\tvec2 uv2 = uv;\n\t\tvec2 offset = offsets[o]/size;\n\t\tfor (int i = 1; i < iterations; i += 1) {\n\t\t\tuv2 += offset;\n\t\t\tvec4 color2 = $in(fract(uv2));\n\t\t\tif (color2.z+color2.w == 0.0) {\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tvec2 p1 = color.xy+floor(uv-color.xy);\n\t\t\tvec2 p2 = color2.xy+floor(uv2-color2.xy);\n\t\t\tvec2 p = min(p1, p2);\n\t\t\tvec2 s = max(p1+color.zw, p2+color2.zw)-p;\n\t\t\tcolor = mix(vec4(0.0, 0.0, 1.0, 1.0), vec4(fract(p), s), step(s.xyxy, vec4(1.0)));\n\t\t}\n\t}\n\treturn floor(color*size)/size;\n}\n", "name": "Fill iterate", "outputs": [ { "rgba": "$(name)_fill($uv)", "type": "rgba" } ], "parameters": [ { "default": 9, "first": 6, "label": "", "last": 12, "name": "s", "type": "size" } ] }, "type": "shader" }