103 lines
2.9 KiB
Markdown
103 lines
2.9 KiB
Markdown
---
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name: probuilder-flip-normals
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description: Reverse the normal direction of selected faces in a `ProBuilderMesh`, flipping them inside-out. Useful for creating interior spaces (a room from the inside of a cube) or fixing inverted faces. Defaults to all faces when no selection is supplied.
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metadata:
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generated-by: mcp-plugin-dotnet
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---
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# Flip face normals in a ProBuilder mesh
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Reverse the normal direction of selected faces in a `ProBuilderMesh`, flipping them inside-out. Useful for creating interior spaces (a room from the inside of a cube) or fixing inverted faces produced by other operations.
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## Inputs
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- `gameObjectRef` — the GameObject hosting the `ProBuilderMesh` component.
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- `faceIndices` — optional explicit list of face indices to flip.
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- `faceDirection` — optional semantic alternative (`Up`, `Down`, `Left`, `Right`, `Forward`, `Back`).
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When both are omitted, **every face** is flipped.
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## Examples
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- Flip all faces: leave both `faceIndices` and `faceDirection` empty.
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- Flip top face only: `faceDirection=Up`.
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- Flip specific faces: `faceIndices=[0, 2, 4]`.
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## Behavior
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The mesh is rebuilt (`ToMesh` → `Refresh`), dirty-flagged, and the Editor repaints. The whole call runs on the Unity main thread.
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## How to Call
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```bash
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unity-mcp-cli run-tool probuilder-flip-normals --input '{
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"gameObjectRef": "string_value",
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"faceIndices": [],
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"faceDirection": "string_value"
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}'
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```
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> For complex input (multi-line strings, code), save the JSON to a file and use:
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> ```bash
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> unity-mcp-cli run-tool probuilder-flip-normals --input-file args.json
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> ```
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>
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> Or pipe via stdin (recommended):
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> ```bash
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> unity-mcp-cli run-tool probuilder-flip-normals --input-file - <<'EOF'
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> {"param": "value"}
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> EOF
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> ```
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### Troubleshooting
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If `unity-mcp-cli` is not found, either install it globally (`npm install -g unity-mcp-cli`) or use `npx unity-mcp-cli` instead.
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Read the /unity-initial-setup skill for detailed installation instructions.
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## Input
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| Name | Type | Required | Description |
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|------|------|----------|-------------|
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| `gameObjectRef` | `string` | Yes | Reference to the GameObject with a ProBuilderMesh component. RQL: GameObjectRef |
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| `faceIndices` | `array` | No | Array of face indices to flip. If empty and faceDirection is empty, flips all faces. |
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| `faceDirection` | `string` | No | Semantic face selection by direction. If empty and faceIndices is empty, flips all faces. |
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### Input JSON Schema
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```json
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{
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"type": "object",
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"properties": {
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"gameObjectRef": {
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"type": "string"
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},
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"faceIndices": {
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"type": "array",
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"items": {
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"type": "integer"
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}
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},
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"faceDirection": {
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"type": "string",
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"enum": [
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"Up",
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"Down",
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"Left",
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"Right",
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"Forward",
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"Back"
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]
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}
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},
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"required": [
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"gameObjectRef"
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]
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}
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```
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## Output
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This tool does not return structured output.
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