Feature Request: 3D Pipeline/Water Pipe Drawing Tool

[huang1005]

Problem or motivation

Currently, Pascal Editor focuses on architectural elements like walls and furniture. However, there is no support for MEP (Mechanical, Electrical, and Plumbing) elements. When designing a room, it's crucial to visualize water pipe layouts to avoid conflicts with furniture or structural elements.

Proposed solution

New "Pipe" Tool: Add a dedicated tool in the sidebar for drawing pipelines.

Point-to-Point Drawing: Users can click points in the 3D/2D view to define the path of the pipe.

Parameters: Allow users to adjust the pipe diameter, height from the floor (offset), and material/color.

Automatic Elbows: Automatically generate 90-degree or curved elbows at turning points.

Alternatives considered

No response

Additional context

No response

[KongNan]

Good ! Maybe I can look forward to installing cables(catenary) in the conduit too :)

[Aymericr]

A substantial part of this request has shipped: the Build palette now includes a 2D/3D DWV Pipe tool with polyline drawing, nominal diameter and material controls, waste/vent mode, automatic elbows/wyes/sanitary tees, P-traps, editable path points, vertical stacks, and connectivity validation. This currently models drain/waste/vent rather than pressurized potable-water supply, so I am keeping the issue open for the remaining water-supply semantics rather than marking the whole request complete.

[KongNan]

Thank you for your excellent work! In the future, it would be even better if it could be used for structured cabling in addition to water supply. Thank you again!

[Aymericr]

Narrowing this to what's actually still missing, so it stops reading as "no MEP support".

Shipped (as @Aymericr noted in July, and I've re-verified against main): the DWV pipe tool covers every mechanic in the original request — polyline point-to-point drawing in 2D and 3D, nominal diameter, material, automatic elbows/wyes/sanitary tees, P-traps, editable path points, vertical stacks, connectivity validation. Plus a wider MEP set than this issue asked for: duct-segment, duct-fitting, duct-terminal, hvac-equipment, liquid-line, lineset, gutter, downspout and the vent family.

Still missing — pressurized supply. Concretely, in packages/core/src/schema/nodes/pipe-segment.ts:

system: z.enum(['waste', 'vent']).default('waste'),

There's no supply. That's not a cosmetic gap — supply behaves differently in ways the schema encodes: waste runs slope (slope lives in the path's Y coordinates) while supply is pressurized and doesn't care about slope; supply wants hot/cold as a distinguishable pair, copper/PEX materials rather than PVC/ABS/cast-iron, and fixture-unit sizing rather than DWV sizing. So it's a real slice of work, not an enum entry.

The original ask here — "visualize water pipe layouts to avoid conflicts with furniture or structural elements" — is served for drains today and not for supply. I'm keeping this open scoped to potable water supply, and relabeling accordingly.

@KongNan on structured cabling / catenary cables in conduit: that's a genuinely separate kind, not a variant of the pipe schema — cable trays and conduit fills have their own routing rules, and a catenary sag curve is different geometry from a straight polyline run. Please open it as its own feature request so it can be scoped independently rather than tracked behind supply plumbing; happy to point at liquid-line as the closest existing pattern to copy, since it already does 45°-locked routing and lineset following. Also worth knowing that new kinds can ship as a plugin without touching the built-ins — Create a plugin, with pascalorg/plugin-trees as a worked example.