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use std::marker::PhantomData;
use crate::{ListFormat, PolygonList, TriangulationError, List, ListBuilder};
use super::GenericList;
#[derive(Debug)]
pub struct DeindexedListFormat<'p, P: PolygonList<'p> + ?Sized, L: List<P::Vertex>>
where P::Vertex: Clone {
list: L,
_phantom: PhantomData<&'p P>,
}
impl<'p, P: PolygonList<'p> + ?Sized, L: List<P::Vertex>> DeindexedListFormat<'p, P, L>
where P::Vertex: Clone {
pub fn new(list: L) -> Self {
Self { list, _phantom: PhantomData, }
}
}
impl <'p, P: PolygonList<'p> + ?Sized, L: List<P::Vertex>> ListFormat<'p, P> for DeindexedListFormat<'p, P, L>
where P::Vertex: Clone {
type Builder = DeindexedListBuilder<'p, P, L>;
fn initialize(self, polygon_list: &'p P) -> Result<Self::Builder, <Self::Builder as ListBuilder<'p, P>>::Error> {
DeindexedListBuilder::new(self.list, polygon_list)
}
}
pub struct DeindexedListBuilder<'p, P: PolygonList<'p> + ?Sized, L: List<P::Vertex>>
where P::Vertex: Clone {
list: GenericList<L, P::Vertex>,
polygon_list: &'p P,
}
impl<'p, P: PolygonList<'p> + ?Sized, L: List<P::Vertex>> DeindexedListBuilder<'p, P, L>
where P::Vertex: Clone {
fn new(list: L, polygon_list: &'p P) -> Result<Self, <Self as ListBuilder<'p, P>>::Error> {
let list = GenericList::new(list);
let l = Self {
list,
polygon_list,
};
Ok(l)
}
}
impl<'p, P: PolygonList<'p> + ?Sized, L: List<P::Vertex>> ListBuilder<'p, P> for DeindexedListBuilder<'p, P, L>
where P::Vertex: Clone {
type Output = L;
type Error = std::convert::Infallible;
fn add_triangle(&mut self, vi0: P::Index, vi1: P::Index, vi2: P::Index) -> Result<(), Self::Error> {
let (v0, v1, v2) = (self.polygon_list.get_vertex(vi0).clone(), self.polygon_list.get_vertex(vi1).clone(), self.polygon_list.get_vertex(vi2).clone());
self.list.new_triangle(v0, v1, v2);
Ok(())
}
fn build(self) -> Result<Self::Output, Self::Error> {
Ok(self.list.build())
}
fn fail(self, _error: &TriangulationError<Self::Error>) {
self.list.fail();
}
}