{
  "context": "This criteria evaluates how well the engineer uses the gl package's vertex attribute configuration APIs, specifically vertexAttribPointer and related functions, to properly set up interleaved vertex data for rendering.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Buffer creation",
      "description": "Uses createBuffer() to create a vertex buffer object and bindBuffer() with ARRAY_BUFFER target to bind it before uploading data",
      "max_score": 10
    },
    {
      "name": "Buffer data upload",
      "description": "Uses bufferData() to upload the interleaved vertex data (positions and colors) to the GPU, with appropriate usage hint (STATIC_DRAW, DYNAMIC_DRAW, or STREAM_DRAW)",
      "max_score": 10
    },
    {
      "name": "Attribute location retrieval",
      "description": "Uses getAttribLocation() to retrieve the location indices for both the position and color vertex attributes from the shader program",
      "max_score": 15
    },
    {
      "name": "Position attribute pointer",
      "description": "Uses vertexAttribPointer() to configure the position attribute with correct parameters: index from getAttribLocation, size=2 (xy components), type=FLOAT, stride=20 bytes (5 floats), and offset=0",
      "max_score": 20
    },
    {
      "name": "Color attribute pointer",
      "description": "Uses vertexAttribPointer() to configure the color attribute with correct parameters: index from getAttribLocation, size=3 (rgb components), type=FLOAT, stride=20 bytes (5 floats), and offset=8 bytes (2 floats)",
      "max_score": 20
    },
    {
      "name": "Enable position attribute",
      "description": "Uses enableVertexAttribArray() to enable the position vertex attribute array before rendering",
      "max_score": 10
    },
    {
      "name": "Enable color attribute",
      "description": "Uses enableVertexAttribArray() to enable the color vertex attribute array before rendering",
      "max_score": 10
    },
    {
      "name": "Correct data layout",
      "description": "Constructs the vertex data array with correct interleaved layout where each vertex has 5 floats (x, y, r, g, b) in sequence, matching the stride and offset values in vertexAttribPointer calls",
      "max_score": 5
    }
  ]
}