`react-doctor/three-shader-require-position-on-all-paths`

Vertex shader leaves gl_Position undefined

Category: Bugs
Severity: error
Source: oxlint-plugin-react-doctor
Framework: global
Enabled when: three
Tags: three, webgl
Default: Enabled

Validate the diagnostic

Confirm the reported code matches this rule before you edit it.

Confirm the reported code matches react-doctor/three-shader-require-position-on-all-paths. Compare it with the Before example and verify the same API, framework, and execution context. Treat it as a false positive only when one of those conditions differs.

Compare the code

The corrected pattern shows a focused way to address the diagnostic.

Reported pattern

void main() {
  if (hidden) return;
  gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);
}

Corrected pattern

void main() {
  gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);
  if (hidden) return;
}

How to fix

Use the corrected pattern as a reference. Preserve behavior that the rule does not require you to change.

Copyable fix prompt

Copy this self-contained prompt into your coding agent after you confirm the diagnostic.

Fix every confirmed react-doctor/three-shader-require-position-on-all-paths diagnostic in the current repository. Required change: - Assign gl_Position before every return and on every path through main.

Reference transformation:Before:

void main() {
  if (hidden) return;
  gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);
}

After:

void main() {
  gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);
  if (hidden) return;
}

Constraints: - Confirm the reported code matches the Before pattern. - Make the smallest change that fixes the root cause. - Preserve behavior and interfaces unrelated to this diagnostic. - Reuse existing project components, utilities, and conventions. - Do not introduce render-phase side effects, render-phase state updates, or Hooks rule violations. - Adapt identifiers and framework details instead of copying blindly. - Do not disable the rule or suppress matching code. - Confirm this rule is enabled for the project: three. Verification: - Run focused tests for the changed behavior. - Run React Doctor and confirm this diagnostic no longer appears. - Report the files changed and any checks you could not run.

More Bugs rules from the rules reference:

react-doctor/three-shader-require-uniform-bindings: Shader uniform has no material binding
react-doctor/three-tsl-no-js-uniform-branch: JavaScript branch reads a TSL uniform value
react-doctor/three-webgpu-no-legacy-effect-composer: Legacy EffectComposer used with WebGPURenderer
react-doctor/three-webgpu-no-legacy-material-api: Legacy material API used with WebGPURenderer
react-doctor/valtio-no-proxy-read-in-render: Valtio proxy read during render

react-doctor/three-shader-require-position-on-all-paths