* claim: #4783
* Physical material: one rule for a body's material and its density (#4783)
inspect.measure, component.properties, occurrence.properties and the
Properties window took a body's material name from the raw assignment,
but its density from Document::density, which falls back to the default
material when the assigned one is unknown or has an unusable density. So
a damaged or hand-edited design read one material and weighed another: a
design material "Broken" at -3 g/cm³ read "Broken" at 1.29 g/cm³.
One rule, in one place:
- DEFAULT_MATERIAL (new, beside DEFAULT_DENSITY in the material library)
is the default material's name. The library's first row uses it.
- Document::body_material (new, beside Document::density) is the material
a body's mass is computed with, as the library or the design spells it:
the assigned one when it is known and has a usable density, else
DEFAULT_MATERIAL. Document::density is that material's density, with
the same value as before for every input.
inspect.measure and the physical properties name body_material.
inspect.measure now names every body's material, measured or not, since
naming it takes no measuring; the density stays with the mass, on the
bodies measured. So the Properties window shows the engine's name without
a fallback of its own. The places that keep the assignment as stored
(configuration cells, material.assign, material.edit, material.delete
and the dialogs) only use the constant, so a configuration still keeps a
damaged assignment as it is.
The visible change: a body whose material is unknown, or has an unusable
density, reads "Default", the material it weighs, and a miscased name
reads as the library or the design spells it. A body inspect.measure
can't measure now has its material too. Masses and densities don't
change.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
CamWight