WebGL属性2顶点越界访问错误：添加画布第二种对象遇阻

Let’s walk through common pitfalls and clarify what details would help narrow this down:

First, let’s rule out these quick checks #

• Attribute 2 configuration mismatch: The error specifically flags attribute 2 (which is likely your texCoords array, since attributes are 0-indexed). Double-check your vertexAttribPointer call for this attribute—did you set the correct size (e.g., 2 for UV coordinates) and stride/offset values? It’s easy to mix these up when adding a new object type with different data layouts.
• Buffer binding errors: When rendering the second object, are you properly rebinding or updating the buffers for all three attributes? If you’re reusing buffers without overwriting them with the new object’s data, WebGL might be trying to read leftover data that doesn’t match the new vertex count.
• Draw call parameter mix-up: Verify your drawArrays or drawElements calls for the second object. Are you passing the correct vertex count (count parameter)? Accidentally using the first object’s vertex count here would immediately cause an out-of-range access.
• Instanced rendering divisor issues: If you’re using instanced drawing, make sure the attribute divisor is set correctly for both objects. A mismatched divisor can trick WebGL into trying to access more vertex data than exists in the buffer.

What additional info would help dig deeper? #

• Snippets of your rendering function where you set up the second object’s attributes and buffers
• The exact vertexAttribPointer code for all three attributes (points, normals, texCoords)
• The drawArrays/drawElements calls for both your original and new object
• How you’re managing buffer data (are you creating new buffers for the second object, or updating existing ones?)

内容的提问来源于stack exchange，提问作者Tyler Weiss