> ## Documentation Index
> Fetch the complete documentation index at: https://docs.parashell.cloud/llms.txt
> Use this file to discover all available pages before exploring further.

# Geometry builder tools

> High-level geometry creation and boolean tools for common solid-building operations.

High-level geometry creation and boolean tools for common solid-building operations.

Tool count: `11`.

Client note: `ctx` is injected by the MCP server and is not supplied as a user argument.

## `boolean_op`

Signature:

```python theme={null}
boolean_op(doc_name: str, operation: Literal['union', 'cut', 'intersect'], operands: list[str], result_name: str | None = None, delete_operands: bool = False, recompute: bool = True, verify_growth: bool = True) -> list[TextContent | ImageContent]
```

Descriptor:

```text theme={null}
Run a single boolean operation on N operands in one call.

Operations:
  - "union" / "fuse":  result = operand[0].fuse(operand[1..N-1])
  - "cut" / "difference":  result = operand[0] minus everything that follows
  - "intersect" / "common":  intersection of all operands

Replaces the chain of intermediate Part::Fuse / Part::Cut feature objects
when you only care about the final shape. With delete_operands=True the
source objects are removed after the boolean, leaving a clean tree.

Operands accept names or take_snapshot uids.

Growth verification (verify_growth=True, default) measures the operand and
result volumes itself instead of trusting the kernel's success flag. It
rejects results that are physically impossible for the requested operation:
a union whose volume is smaller than its largest operand (the classic
silently-dropped-operand / hollow-result failure), a union larger than the
sum of its operands, an intersection or cut larger than its inputs, or any
result that collapses to zero volume. When a violation is detected the
boolean is aborted, no result object is created, and the response reports
the measured volumes so the failure is caught programmatically rather than
only on a section cut. Set verify_growth=False to bypass the guard.

Args:
    doc_name: Document containing the operands.
    operation: "union", "cut", or "intersect".
    operands: List of object names or uids (>= 2). Order matters for cuts.
    result_name: Optional name for the result Part::Feature. Auto-generated
                 when omitted.
    delete_operands: When True, remove the source operands after the boolean.
                     Default False.
    recompute: Whether to recompute after creation. Default True.
    verify_growth: When True (default), assert the result volume is
                   consistent with the operation and abort on violation.
```

## `make_arch_opening`

Signature:

```python theme={null}
make_arch_opening(doc_name: str, name: str, width: float, height: float, depth: float, arch_kind: Literal['round', 'pointed', 'flat'] = 'round', arch_height: float | None = None, placement: dict[str, Any] | None = None, recompute: bool = True) -> list[TextContent | ImageContent]
```

Descriptor:

```text theme={null}
Create an arched opening solid (rectangular base + arched top) in one call.

The shape is positioned with the bottom of the rectangular section at z=0,
centered on x=0, and extending along Y by 'depth'. Subtract this from a
wall (boolean_op operation="cut") to punch a doorway, gateway, or window.

Arch kinds:
  - "round": semicircular arch - arch_height is fixed at width/2 and
    'arch_height' is ignored. Total opening height must exceed width/2.
  - "pointed": gothic-style isosceles triangle arch - arch_height defaults
    to width when omitted.
  - "flat": shallow segmental arch above a rectangle - arch_height defaults
    to width/4 when omitted.

Args:
    doc_name: Document to add the opening solid to.
    name: Name for the new Part::Feature.
    width: Opening width in mm.
    height: Total opening height in mm (rectangle + arch combined).
    depth: Wall thickness the opening must pass through in mm.
    arch_kind: "round", "pointed", or "flat".
    arch_height: Override arch height. Ignored for round arches.
    placement: Optional placement dict.
    recompute: Whether to recompute after creation. Default True.
```

## `make_crenellated_wall`

Signature:

```python theme={null}
make_crenellated_wall(doc_name: str, name: str, length: float, thickness: float, height: float, merlon_width: float, gap_width: float, merlon_height: float, start_with_merlon: bool = True, placement: dict[str, Any] | None = None, recompute: bool = True) -> list[TextContent | ImageContent]
```

Descriptor:

```text theme={null}
Create a crenellated wall - base wall with merlons on top - in one call.

Replaces hand-placed merlon loops for castle walls, fortifications, garden
walls, parapets. The base wall has height (height - merlon_height); the
merlons sit on top and step along the wall length with width 'merlon_width'
separated by gaps of 'gap_width'.

Args:
    doc_name: Document to add the wall to.
    name: Name for the new Part::Feature.
    length: Total wall length in mm.
    thickness: Wall thickness in mm.
    height: Total height including merlons in mm.
    merlon_width: Width of each merlon along the wall in mm.
    gap_width: Crenel (gap) width in mm.
    merlon_height: Height of merlons above the base wall in mm.
    start_with_merlon: When True, the wall begins with a merlon at x=0.
                       When False, it begins with a gap.
    placement: Optional placement dict.
    recompute: Whether to recompute after creation. Default True.
```

## `make_gear`

Signature:

```python theme={null}
make_gear(doc_name: str, name: str, module: float, tooth_count: int, thickness: float, pressure_angle_deg: float = 20.0, hub_radius: float = 0.0, bore_radius: float = 0.0, helix_angle_deg: float = 0.0, placement: dict[str, Any] | None = None, recompute: bool = True) -> list[TextContent | ImageContent]
```

Descriptor:

```text theme={null}
Create an involute spur (or helical) gear in one call.

Generates a true involute tooth profile, extrudes it to the requested
thickness, optionally fuses an axial hub, and optionally cuts a central bore.
Replaces hand-built gears made from boxes-as-teeth fused to a disc.

Geometry:
  pitch_radius = module * tooth_count / 2
  addendum     = module
  dedendum     = 1.25 * module
  base_radius  = pitch_radius * cos(pressure_angle)

Helical gears (helix_angle_deg != 0) are produced by lofting twisted copies
of the tooth profile.

Args:
    doc_name: Document to add the gear to.
    name: Name for the new Part::Feature.
    module: Gear module in mm. Pitch diameter = module * tooth_count.
    tooth_count: Number of teeth (>= 4).
    thickness: Axial gear thickness in mm.
    pressure_angle_deg: Standard 20 deg unless you need a custom value.
    hub_radius: Optional cylindrical hub fused to the gear face. 0 = no hub.
    bore_radius: Optional cylindrical bore through the center. 0 = no bore.
    helix_angle_deg: Helical twist angle. 0 = spur gear.
    placement: Optional placement dict.
    recompute: Whether to recompute after creation. Default True.
```

## `make_hollow_box`

Signature:

```python theme={null}
make_hollow_box(doc_name: str, name: str, length: float, width: float, height: float, thickness: float, open_top: bool = False, open_bottom: bool = False, placement: dict[str, Any] | None = None, recompute: bool = True) -> list[TextContent | ImageContent]
```

Descriptor:

```text theme={null}
Create a hollow box (outer minus inner) in one call.

Replaces the manual outer-box-minus-inner-box pattern for curtain walls,
moats, hollow plinths, container bodies. Outer dimensions are length x width
x height; the cavity is shrunk by 'thickness' on each side.

Args:
    doc_name: Document to add the hollow box to.
    name: Name for the new Part::Feature.
    length / width / height: Outer dimensions in mm.
    thickness: Wall thickness in mm. Must be < min(length, width)/2 and
               (depending on open_top/bottom) < height/2.
    open_top: When True, the top face is removed (no ceiling).
    open_bottom: When True, the bottom face is removed (no floor).
    placement: Optional placement dict.
    recompute: Whether to recompute after creation. Default True.
```

## `make_hollow_cylinder`

Signature:

```python theme={null}
make_hollow_cylinder(doc_name: str, name: str, outer_radius: float, height: float, thickness: float, open_top: bool = True, open_bottom: bool = False, placement: dict[str, Any] | None = None, recompute: bool = True) -> list[TextContent | ImageContent]
```

Descriptor:

```text theme={null}
Create a hollow cylinder (outer cylinder minus inner cylinder) in one call.

Replaces the manual outer-cylinder-minus-inner-cylinder pattern for wells,
pipes, towers, silos. Inner radius = outer_radius - thickness.

Args:
    doc_name: Document to add the cylinder to.
    name: Name for the new Part::Feature.
    outer_radius: Outer radius in mm.
    height: Height in mm.
    thickness: Wall thickness in mm. Must be < outer_radius.
    open_top: When True, the top is open. Default True (well-style).
    open_bottom: When True, the bottom is open.
    placement: Optional placement dict.
    recompute: Whether to recompute after creation. Default True.
```

## `make_pyramid`

Signature:

```python theme={null}
make_pyramid(doc_name: str, name: str, base_radius: float | None = None, base_sides: int = 4, height: float | None = None, base_rotation_deg: float = 0.0, base_points: list[list[float]] | None = None, apex: list[float] | None = None, placement: dict[str, Any] | None = None, recompute: bool = True) -> list[TextContent | ImageContent]
```

Descriptor:

```text theme={null}
Create a pyramid solid in one call. Two modes:

Regular polygon base (default):
    Pass base_radius (circumscribed-circle radius), base_sides (>=3),
    and height. The base sits on the XY plane centered at the origin,
    the apex is at (0, 0, height). 'base_rotation_deg' rotates the base
    polygon around its center for orientation tweaks. base_sides=4 gives
    a square pyramid (keep roof), base_sides=3 a tetrahedron-style spike,
    base_sides=8 an octagonal spire, and so on.

Arbitrary polygon base:
    Pass base_points as a list of [x, y, z] points (any planar polygon)
    plus apex as a single [x, y, z] point. Useful for irregular roofs.

Args:
    doc_name: Document to add the pyramid to.
    name: Name for the new Part::Feature.
    base_radius: Circumscribed-circle radius for the regular base.
    base_sides: Number of sides for the regular base (>=3). Default 4.
    height: Apex height above the regular base in mm.
    base_rotation_deg: Rotate the regular base around its center.
    base_points: Optional list of [x,y,z] points for an irregular base.
    apex: Apex point [x,y,z] when base_points is supplied.
    placement: Optional placement dict applied to the whole pyramid.
    recompute: Whether to recompute after creation. Default True.
```

## `make_ring`

Signature:

```python theme={null}
make_ring(doc_name: str, name: str, outer_radius: float, thickness: float, inner_radius: float = 0.0, tilt_deg: float = 0.0, placement: dict[str, Any] | None = None, recompute: bool = True) -> list[TextContent | ImageContent]
```

Descriptor:

```text theme={null}
Create a ring (or solid disc when inner_radius=0) in one call.

Replaces the manual outer-cylinder-minus-inner-cylinder pattern. The optional
tilt_deg rotates the ring about the X axis, useful for Saturn-style rings or
tilted orbital tracks. Custom placements (translation + rotation) override
the default flat XY orientation.

Args:
    doc_name: Document to add the ring to.
    name: Name for the new Part::Feature.
    outer_radius: Outer ring radius (mm).
    thickness: Ring thickness along the local Z axis (mm).
    inner_radius: Inner radius (mm). 0 produces a solid disc.
    tilt_deg: Rotation about local X axis applied after construction.
    placement: Optional placement dict {"Base": {x,y,z}, "Rotation": {Axis: {x,y,z}, Angle: deg}}.
    recompute: Whether to recompute after creation. Default True.
```

## `make_segment_between_points`

Signature:

```python theme={null}
make_segment_between_points(doc_name: str, name: str, p1: list[float], p2: list[float], cross_section: Literal['circular', 'box'] = 'circular', radius: float | None = None, width: float | None = None, height: float | None = None, end_caps: Literal['flat', 'round'] = 'flat', recompute: bool = True) -> list[TextContent | ImageContent]
```

Descriptor:

```text theme={null}
Create a segment (cylinder or box) between two world-space points.

The required cross-section dimensions depend on 'cross_section':
  - "circular": pass 'radius'. Optional 'end_caps="round"' fuses
    hemispherical caps on each tip.
  - "box": pass 'width' (and optional 'height'; defaults to width for square cross-section).
    The box is centered on the segment axis.

Direction vector and rotation are computed automatically - replaces manual
Vector / Rotation cross-product math for diagonals like gatehouse chains,
diagonal struts, frame elements, support cables, gantry rails.

Args:
    doc_name: Document to add the segment to.
    name: Name for the new Part::Feature.
    p1: Start point [x, y, z] in mm.
    p2: End point [x, y, z] in mm.
    cross_section: "circular" or "box". Default circular.
    radius: Segment radius for circular cross-section.
    width: Box width for box cross-section.
    height: Box height for box cross-section. Defaults to width.
    end_caps: For circular cross-section only - "flat" or "round".
    recompute: Whether to recompute after creation. Default True.
```

## `make_sketch_extrude`

Signature:

```python theme={null}
make_sketch_extrude(doc_name: str, name: str, profile: list[dict[str, Any]], depth: float, direction: list[float] | None = None, placement: dict[str, Any] | None = None, recompute: bool = True) -> list[TextContent | ImageContent]
```

Descriptor:

```text theme={null}
Build a 2D profile from line/arc segments and extrude it into a solid.

The profile is a list of geometry dicts using the same schema as
edit_sketch_geometry. Edges must form a closed loop. Common entries:

  LineSegment:
    {"type": "LineSegment", "start": [x, y], "end": [x, y]}

  ArcOfCircle:
    {"type": "ArcOfCircle", "center": [x, y], "radius": r,
     "start_angle": deg_or_rad, "end_angle": deg_or_rad,
     "angle_unit": "deg" | "rad"}

  Other supported types: Circle (closed-loop only), Point, Ellipse.

Use this for arrow slits, pointed-arch windows, gothic shapes, custom
door cutouts, irregular plate outlines - anything that's hard to express
as a chain of boolean primitives.

Args:
    doc_name: Document to add the extrusion to.
    name: Name for the new Part::Feature.
    profile: List of geometry dicts forming a closed wire on the XY plane.
    depth: Extrusion depth in mm. Positive = +Z when 'direction' is omitted.
    direction: Optional [dx, dy, dz] extrusion direction. Defaults to +Z.
    placement: Optional placement applied after extrusion (translate/rotate
               the whole solid).
    recompute: Whether to recompute after creation. Default True.
```

## `make_strut_between_points`

Signature:

```python theme={null}
make_strut_between_points(doc_name: str, name: str, p1: list[float], p2: list[float], radius: float, end_caps: Literal['flat', 'round'] = 'flat', recompute: bool = True) -> list[TextContent | ImageContent]
```

Descriptor:

```text theme={null}
Create a cylindrical strut between two world-space points.

Computes the direction vector and rotation automatically - replaces manual
Vector / Rotation math for diagonal supports, frame elements, gantry struts.

Args:
    doc_name: Document to add the strut to.
    name: Name for the new Part::Feature.
    p1: Start point [x, y, z] in mm.
    p2: End point [x, y, z] in mm.
    radius: Strut radius in mm.
    end_caps: "flat" (default) or "round" (hemispherical caps fused on each end).
    recompute: Whether to recompute after creation. Default True.
```