Feature Request: Isometric Grid with Snap-to-Grid support

[benjaminfavreuille-alt]

Hello maintainers!

First of all, thank you for the amazing work on draw.io.

I use draw.io extensively to create piping plans in isometric views. I would love to have the option to select a native isometric grid to make representing these networks much easier.

Currently, my workaround is to disable the standard grid and insert a background image instead. Here is an example of the plans I create:

While this solution works, it is not practical for precise work. The main issue is the lack of snap-to-grid functionality for isometric axes. Since the objects and connectors don't "snap" to the background image's lines, it is nearly impossible to achieve perfect alignment between pipes and connection points.

Below is a close-up where you can see these alignment and connection gaps:

Having a native isometric grid with proper snapping would be a game-changer for this type of technical diagramming.

Thank you again for providing such a powerful tool!

Benjamin

[draw-io-triage-bot[bot]]

👋 Thank you for opening this issue!

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Summary: The user requests a native isometric grid option with snap-to-grid functionality along isometric axes (30°/150° diagonals and horizontal) to enable precise alignment when creating technical piping diagrams in isometric views. Currently they use a background image as a workaround but cannot achieve precise snapping.

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📝 Additional Information Needed

To help us investigate this more effectively, could you please provide:

• Would a triangular/isometric grid with 30-degree angles (standard isometric projection) meet your needs, or do you require configurable angles?
• What grid spacing would be most useful for your piping plans — would you want this to be configurable?
• Would snap-to-grid along the three isometric axes (horizontal + two 30° diagonals) be sufficient, or would you also need isometric shape libraries (e.g., isometric pipe fittings, valves)?

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_{🤖 This is an automated response to help with initial triage. A human maintainer will review this issue. If you've provided all the requested information, no further action is needed - we'll get back to you soon!}

[benjaminfavreuille-alt]

Thank you for your response!

Grid Angles: For my specific use case, I don't need configurable angles. A standard setup with a vertical axis and two diagonals at -60° and +60° relative to it would be perfect.

Grid Spacing: Yes, I would definitely like to be able to configure the grid spacing.

Priorities: Adding the isometric grid and the snap-to-grid functionality on these three axes would already be a fantastic improvement!

Isometric Shapes: Having valves available in an isometric view would be the "cherry on top." As you can see in the examples below, I am currently drawing all the isometric valves manually...

Thank you again for your time and for considering this request!