YAML parsing debug

[kbonney]

Summary

The goal of this PR is to resolve bugs in the yaml_to_blade() function. Currently, there are observed differences in the total weight of blades compared to their design documents.

yaml_to_blade() changes

• Blade length: remove np.ceil and redundant hub-radius arithmetic. Uses exact YAML span value
• Corrected density vs drydensity calculations. Now "rho" is assigned to density (cured density) and drydensity is assigned "area_density_dry" if it exists, otherwise nan. These updates are documented in the Material class docstring.
• Spar cap attributes: use _lp / _hp suffixes to avoid LP overwriting HP (or vice versa)
• Airfoil winding: replace arctan(y/x) gradient check with the shoelace signed-area formula. Avoids divide-by-zero near x = 0
• fabricangle: replace finally: pass with except (KeyError, TypeError): cur_comp.fabricangle = 0
• ValueErrors in _add_components: add missing raise to all four TE/LE reinforcement error sites
• yaml.FullLoader: replace deprecated yaml.Loader
• ispan aliasing: definition.ispan = definition.span.copy() instead of direct assignment
• Import cleanup: remove unused from scipy.stats import mode

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BOM changes

• Now computes two weights: dryweight and curedweight based on drydensity and density respectively using the following formulas:

                            "dryweight": mat.drydensity * regionarea,
                            "curedweight": mat.density * mat.layerthickness * mm_to_m * regionarea

• BOM now has the top level attributes total_dryweight and total_curedweight, which takes the sum across all bom entries.

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Example blade files cleanup

• Removed duplicate files
• Renamed files for clarity on their contents
• Updated tests/example files with new filenames

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yaml_to_blade_v2 Added a new version of yaml parser that supports WindIO ontology version 2
The v2 ontology introduces several structural and naming changes from v1:

• Twist units: twist is now in degrees; v1 stored radians
• Anchor indirection: start_nd_arc/end_nd_arc on layers and webs can be anchor references ({anchor: {name, handle}}) instead of inline {grid, values} dicts; anchors may live at structure.anchors or nested under individual webs[i].anchors
• Spar cap geometry: spar caps define their chordwise extent via nd_arc (normalized arc fraction 0–1) rather than explicit width/offset; HP and LP sides are identified by _PS/_SS name suffixes instead of a side field
• section_offset_y: chord offset is now absolute meters from the leading edge rather than a normalized fraction; the reader divides by chord to convert
• rthick: relative thickness key renamed from relative_thickness
• Airfoil list format: outer shape airfoils are a list of {name, spanwise_position} dicts rather than a flat mapping
• Web separation: web laminate layers now live in structure.layers alongside all other layers; structure.webs is purely geometric
• TE/LE band width: band width is stored on the anchor definition rather than on the layer itself. Requires interpolation to full blade span, since only several span points are provided
• Reader organization

The reader is structured as a flat sequence of focused functions called from the top-level yaml_to_blade_v2:

• _build_anchor_map / _resolve_structure_anchors: flattens anchor references to inline {grid, values} before any other processing
• _add_stations_v2: builds span grid, adds airfoil cross-sections, and computes aerocenter from per-station data collected in the loop
• _add_spanwise_properties_v2: interpolates all continuous spanwise quantities (twist, chord, thickness, chordoffset, prebend, sweep) onto the full span grid
• update_internal_structure_v2: expands each layer's field grids to the full normalized span
• _set_sparcap_arc_positions: writes nd_arc bounds to definition for use by keypoints.generate; distinct from _assign_extents_to_comp which sets Component keypoint labels
• _reinforcement_halfwidth_mm: shared helper used for both TE and LE bands; sums anchor widths across matched layers and returns half-width in mm for definition.teband/leband
• _build_component_dict: single-pass construction of all Component objects, with _assign_extents_to_comp dispatching extent labels from the layer name
• _validate_components: post-build check that expected component counts are present
• _add_materials is reused directly from the v1 reader as the material schema is unchanged.

The V2 format also required updates to keypoints.py

• Spar cap keypoints (keypoints.py): KeyPoints.generate previously assumed sparcapwidth_* and sparcapoffset_* were always populated and used them to place the b/c keypoints as z ± 0.5 * width. These attributes do not exist in v2, which instead provides sparcap_start/end_nd_arc_hp/lp. We now check which set of attributes are populated and compute b/c keypoints based on whether we are in v1 or v1. , When scwidth is None an else branch converts nd_arc fractions directly to arc-length positions using geometry.arclength and the per-surface sign convention (HP: (nd - 0.5) / 0.5, LP: (0.5 - nd) / 0.5).

Tests and documentation

na

Acknowledgement

By contributing to this software project, I acknowledge that I have reviewed the software quality assurance guidelines and that my contributions are submitted under the Revised BSD License.