{
  "id": "webcam_glitch",
  "name": "Webcam Glitch",
  "description": "Live webcam pushed through edge detection, RGB split, a feedback loop and a glitch shader for a corrupted-signal look.",
  "tags": ["webcam", "glitch", "feedback", "realtime"],
  "difficulty": "intermediate",
  "td_version_min": "2022",
  "nodes": [
    { "name": "cam", "type": "videodeviceinTOP", "comment": "Webcam input" },
    { "name": "edge", "type": "edgeTOP" },
    { "name": "rgbsplit", "type": "glslTOP", "comment": "Chromatic RGB offset" },
    { "name": "feedback1", "type": "feedbackTOP" },
    {
      "name": "comp1",
      "type": "compositeTOP",
      "parameters": { "outputresolution": "custom", "resolutionw": 1280, "resolutionh": 720 }
    },
    { "name": "glitch", "type": "glslTOP", "comment": "Per-band horizontal displacement" },
    { "name": "out1", "type": "nullTOP" }
  ],
  "connections": [
    { "from": "cam", "to": "edge" },
    { "from": "edge", "to": "rgbsplit" },
    { "from": "rgbsplit", "to": "feedback1" },
    { "from": "rgbsplit", "to": "comp1", "to_input": 0 },
    { "from": "feedback1", "to": "comp1", "to_input": 1 },
    { "from": "comp1", "to": "glitch" },
    { "from": "glitch", "to": "out1" }
  ],
  "parameters": [
    {
      "name": "feedback_target",
      "node": "feedback1",
      "param": "top",
      "value": "glitch",
      "description": "Feedback samples the glitch output."
    }
  ],
  "glsl_code": {
    "rgbsplit": "out vec4 fragColor;\nvoid main(){ vec2 uv=vUV.st; vec2 o=vec2(0.006,0.0);\n  float r=texture(sTD2DInputs[0],uv+o).r; float g=texture(sTD2DInputs[0],uv).g; float b=texture(sTD2DInputs[0],uv-o).b;\n  fragColor=TDOutputSwizzle(vec4(r,g,b,1.0)); }\n",
    "glitch": "out vec4 fragColor;\nfloat hash(float x){return fract(sin(x*127.1)*43758.5453);}\nvoid main(){ vec2 uv=vUV.st; float band=floor(uv.y*24.0);\n  float off=(hash(band)-0.5)*0.08*step(0.7,hash(band*1.7));\n  fragColor=TDOutputSwizzle(texture(sTD2DInputs[0],uv+vec2(off,0.0))); }\n"
  },
  "preview_description": "A ghosted, color-fringed webcam image that periodically tears into horizontal glitch bands."
}