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use fj_math::Winding;
use crate::{
geometry::Geometry,
objects::Face,
validation::{
checks::FaceHasNoBoundary, ValidationCheck, ValidationConfig,
ValidationError,
},
};
use super::Validate;
impl Validate for Face {
fn validate(
&self,
config: &ValidationConfig,
errors: &mut Vec<ValidationError>,
geometry: &Geometry,
) {
errors.extend(
FaceHasNoBoundary::check(self, geometry, config).map(Into::into),
);
FaceValidationError::check_interior_winding(self, geometry, errors);
}
}
/// [`Face`] validation error
#[derive(Clone, Debug, thiserror::Error)]
pub enum FaceValidationError {
/// Interior of [`Face`] has invalid winding; must be opposite of exterior
#[error(
"Interior of `Face` has invalid winding; must be opposite of exterior\n\
- Winding of exterior cycle: {exterior_winding:#?}\n\
- Winding of interior cycle: {interior_winding:#?}\n\
- `Face`: {face:#?}"
)]
InvalidInteriorWinding {
/// The winding of the [`Face`]'s exterior cycle
exterior_winding: Winding,
/// The winding of the invalid interior cycle
interior_winding: Winding,
/// The face
face: Face,
},
}
impl FaceValidationError {
fn check_interior_winding(
face: &Face,
geometry: &Geometry,
errors: &mut Vec<ValidationError>,
) {
if face.region().exterior().half_edges().is_empty() {
// Can't determine winding, if the cycle has no edges. Sounds like a
// job for a different validation check.
return;
}
let exterior_winding = face.region().exterior().winding(geometry);
for interior in face.region().interiors() {
if interior.half_edges().is_empty() {
// Can't determine winding, if the cycle has no edges. Sounds
// like a job for a different validation check.
continue;
}
let interior_winding = interior.winding(geometry);
if exterior_winding == interior_winding {
errors.push(
Self::InvalidInteriorWinding {
exterior_winding,
interior_winding,
face: face.clone(),
}
.into(),
);
}
}
}
}
#[cfg(test)]
mod tests {
use crate::{
assert_contains_err,
objects::{Cycle, Face, Region},
operations::{
build::{BuildCycle, BuildFace},
derive::DeriveFrom,
insert::Insert,
reverse::Reverse,
update::{UpdateFace, UpdateRegion},
},
validate::{FaceValidationError, Validate},
validation::ValidationError,
Core,
};
#[test]
fn interior_winding() -> anyhow::Result<()> {
let mut core = Core::new();
let valid =
Face::unbound(core.layers.objects.surfaces.xy_plane(), &mut core)
.update_region(
|region, core| {
region
.update_exterior(
|_, core| {
Cycle::polygon(
[[0., 0.], [3., 0.], [0., 3.]],
core,
)
},
core,
)
.add_interiors(
[Cycle::polygon(
[[1., 1.], [1., 2.], [2., 1.]],
core,
)],
core,
)
},
&mut core,
);
let invalid = {
let interiors = valid
.region()
.interiors()
.iter()
.cloned()
.map(|cycle| {
cycle
.reverse(&mut core)
.insert(&mut core)
.derive_from(&cycle, &mut core)
})
.collect::<Vec<_>>();
let region =
Region::new(valid.region().exterior().clone(), interiors)
.insert(&mut core);
Face::new(valid.surface().clone(), region)
};
valid.validate_and_return_first_error(&core.layers.geometry)?;
assert_contains_err!(
core,
invalid,
ValidationError::Face(
FaceValidationError::InvalidInteriorWinding { .. }
)
);
Ok(())
}
}