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use cgmath::Point3;
use std::collections::HashMap;
use std::collections::HashSet;
use edge::Edge;
use vert::Vert;
use face::Face;
use ptr::{Ptr, EdgeRc, VertRc, FaceRc, EdgePtr, VertPtr, FacePtr};
use iterators::ToPtrVec;
use util::*;
pub struct HalfEdgeMesh {
pub edges: HashMap<u32, EdgeRc>,
pub vertices: HashMap<u32, VertRc>,
pub faces: HashMap<u32, FaceRc>,
cur_edge_id: u32,
cur_vert_id: u32,
cur_face_id: u32,
}
impl HalfEdgeMesh {
pub fn empty() -> HalfEdgeMesh {
HalfEdgeMesh {
edges: HashMap::new(),
vertices: HashMap::new(),
faces: HashMap::new(),
cur_edge_id: 0,
cur_vert_id: 0,
cur_face_id: 0,
}
}
pub fn from_tetrahedron_pts(p1: Point3<f32>, p2: Point3<f32>, p3: Point3<f32>, p4: Point3<f32>) -> HalfEdgeMesh {
let mut mesh = HalfEdgeMesh::empty();
let v1 = Ptr::new_rc(Vert::empty(mesh.new_vert_id(), p1));
let v2 = Ptr::new_rc(Vert::empty(mesh.new_vert_id(), p2));
let v3 = Ptr::new_rc(Vert::empty(mesh.new_vert_id(), p3));
let v4 = Ptr::new_rc(Vert::empty(mesh.new_vert_id(), p4));
let mut tri;
tri = mesh.make_triangle(& v1, & v2, & v3);
mesh.add_triangle(tri);
tri = mesh.make_triangle(& v2, & v1, & v4);
mesh.add_triangle(tri);
tri = mesh.make_triangle(& v3, & v4, & v1);
mesh.add_triangle(tri);
tri = mesh.make_triangle(& v4, & v3, & v2);
mesh.add_triangle(tri);
mesh.move_verts(vec![v1, v2, v3, v4]);
report_connect_err(connect_pairs(&mut mesh));
mesh
}
pub fn from_octahedron_pts(p1: Point3<f32>, p2: Point3<f32>, p3: Point3<f32>, p4: Point3<f32>, p5: Point3<f32>, p6: Point3<f32>) -> HalfEdgeMesh {
let mut mesh = HalfEdgeMesh::empty();
let v1 = Ptr::new_rc(Vert::empty(mesh.new_vert_id(), p1));
let v2 = Ptr::new_rc(Vert::empty(mesh.new_vert_id(), p2));
let v3 = Ptr::new_rc(Vert::empty(mesh.new_vert_id(), p3));
let v4 = Ptr::new_rc(Vert::empty(mesh.new_vert_id(), p4));
let v5 = Ptr::new_rc(Vert::empty(mesh.new_vert_id(), p5));
let v6 = Ptr::new_rc(Vert::empty(mesh.new_vert_id(), p6));
let mut tri;
tri = mesh.make_triangle(& v1, & v2, & v3);
mesh.add_triangle(tri);
tri = mesh.make_triangle(& v1, & v4, & v2);
mesh.add_triangle(tri);
tri = mesh.make_triangle(& v1, & v3, & v5);
mesh.add_triangle(tri);
tri = mesh.make_triangle(& v1, & v5, & v4);
mesh.add_triangle(tri);
tri = mesh.make_triangle(& v6, & v3, & v2);
mesh.add_triangle(tri);
tri = mesh.make_triangle(& v6, & v2, & v4);
mesh.add_triangle(tri);
tri = mesh.make_triangle(& v6, & v5, & v3);
mesh.add_triangle(tri);
tri = mesh.make_triangle(& v6, & v4, & v5);
mesh.add_triangle(tri);
mesh.move_verts(vec![v1, v2, v3, v4, v5, v6]);
report_connect_err(connect_pairs(&mut mesh));
mesh
}
pub fn from_face_vertex_mesh(vertices: &[Point3<f32>], indices: &[[usize; 3]]) -> HalfEdgeMesh {
let mut mesh = HalfEdgeMesh::empty();
let mut id_map: HashMap<usize, u32> = HashMap::new();
for (idx, pos) in vertices.iter().enumerate() {
let vert = Ptr::new_rc(Vert::empty(mesh.new_vert_id(), *pos));
id_map.insert(idx, vert.borrow().id);
mesh.push_vert(vert);
}
for tri in indices.iter() {
let face = Ptr::new_rc(Face::empty(mesh.new_face_id()));
let mut new_edges: Vec<EdgeRc> = Vec::new();
for idx in tri {
if let Some(vert_id) = id_map.get(idx) {
if mesh.vertices.contains_key(vert_id) {
let new_edge_id = mesh.new_edge_id();
if let Some(vert) = mesh.vertices.get(vert_id) {
let edge = Ptr::new_rc(Edge::with_origin(new_edge_id, Ptr::new(vert)));
edge.borrow_mut().set_face_rc(& face);
vert.borrow_mut().set_edge_rc(& edge);
new_edges.push(edge);
}
}
}
}
let n_edge_len = new_edges.len();
for (idx, edge) in new_edges.iter().enumerate() {
edge.borrow_mut().set_next_rc(& new_edges[(idx + 1) % n_edge_len]);
}
if let Some(ref edge) = new_edges.get(0) {
face.borrow_mut().set_edge_rc(edge);
}
for edge in new_edges {
mesh.push_edge(edge);
}
mesh.push_face(face);
}
report_connect_err(connect_pairs(&mut mesh));
mesh
}
pub fn new_edge_id(&mut self) -> u32 {
self.cur_edge_id += 1; self.cur_edge_id
}
pub fn new_vert_id(&mut self) -> u32 {
self.cur_vert_id += 1; self.cur_vert_id
}
pub fn new_face_id(&mut self) -> u32 {
self.cur_face_id += 1; self.cur_face_id
}
pub fn push_edge(&mut self, edge: EdgeRc) {
let key = edge.borrow().id;
self.edges.insert(key, edge);
}
pub fn extend_edges(&mut self, edges: & [EdgeRc]) {
for edge in edges {
let key = edge.borrow().id;
self.edges.insert(key, edge.clone());
}
}
pub fn move_edges(&mut self, edges: Vec<EdgeRc>) {
for edge in edges {
let key = edge.borrow().id;
self.edges.insert(key, edge);
}
}
pub fn push_vert(&mut self, vert: VertRc) {
let key = vert.borrow().id;
self.vertices.insert(key, vert);
}
pub fn extend_verts(&mut self, verts: & [VertRc]) {
for vert in verts {
let key = vert.borrow().id;
self.vertices.insert(key, vert.clone());
}
}
pub fn move_verts(&mut self, verts: Vec<VertRc>) {
for vert in verts {
let key = vert.borrow().id;
self.vertices.insert(key, vert);
}
}
pub fn push_face(&mut self, face: FaceRc) {
face.borrow_mut().compute_attrs();
let key = face.borrow().id;
self.faces.insert(key, face);
}
pub fn extend_faces(&mut self, faces: & [FaceRc]) {
for face in faces {
face.borrow_mut().compute_attrs();
let key = face.borrow().id;
self.faces.insert(key, face.clone());
}
}
pub fn move_faces(&mut self, faces: Vec<FaceRc>) {
for face in faces {
face.borrow_mut().compute_attrs();
let key = face.borrow().id;
self.faces.insert(key, face);
}
}
pub fn add_triangle(&mut self, triangle: (FaceRc, EdgeRc, EdgeRc, EdgeRc)) {
let mut key: u32;
triangle.0.borrow_mut().compute_attrs();
key = triangle.0.borrow().id;
self.faces.insert(key, triangle.0);
key = triangle.1.borrow().id;
self.edges.insert(key, triangle.1);
key = triangle.2.borrow().id;
self.edges.insert(key, triangle.2);
key = triangle.3.borrow().id;
self.edges.insert(key, triangle.3);
}
pub fn make_triangle(&mut self, p1: & VertRc, p2: & VertRc, p3: & VertRc) -> (FaceRc, EdgeRc, EdgeRc, EdgeRc) {
let e1 = Ptr::new_rc(Edge::with_origin(self.new_edge_id(), Ptr::new(p1)));
let e2 = Ptr::new_rc(Edge::with_origin(self.new_edge_id(), Ptr::new(p2)));
let e3 = Ptr::new_rc(Edge::with_origin(self.new_edge_id(), Ptr::new(p3)));
p1.borrow_mut().take_edge(Ptr::new(& e1));
p2.borrow_mut().take_edge(Ptr::new(& e2));
p3.borrow_mut().take_edge(Ptr::new(& e3));
e1.borrow_mut().take_next(Ptr::new(& e2));
e2.borrow_mut().take_next(Ptr::new(& e3));
e3.borrow_mut().take_next(Ptr::new(& e1));
let f1 = Ptr::new_rc(Face::with_edge(self.new_face_id(), Ptr::new(& e1)));
e1.borrow_mut().take_face(Ptr::new(& f1));
e2.borrow_mut().take_face(Ptr::new(& f1));
e3.borrow_mut().take_face(Ptr::new(& f1));
f1.borrow_mut().compute_attrs();
(f1, e1, e2, e3)
}
pub fn are_faces_adjacent(& self, face_l: & FaceRc, face_r: & FaceRc) -> bool {
face_l.borrow().adjacent_edges()
.any(|edge| {
edge.upgrade()
.and_then(|e| e.borrow().pair.upgrade())
.and_then(|e| e.borrow().face.upgrade())
.map(|f| f == * face_r) == Some(true)
})
}
pub fn are_face_ptrs_adjacent(& self, face_l: & FacePtr, face_r: & FacePtr) -> bool {
match Ptr::merge_upgrade(face_l, face_r) {
Some((l_rc, r_rc)) => self.are_faces_adjacent(& l_rc, & r_rc),
None => false,
}
}
pub fn triangulate_face(&mut self, point: Point3<f32>, target_face: & FaceRc) {
let face_edges = target_face.borrow().adjacent_edges().to_ptr_vec();
let face_vertices = target_face.borrow().adjacent_verts().to_ptr_vec();
let vertices_len = face_vertices.len();
debug_assert!(face_edges.len() == 3, "should be 3 adjacent edges");
debug_assert!(vertices_len == 3, "should be 3 adjacent vertices");
let apex_vert = Ptr::new_rc(Vert::empty(self.new_vert_id(), point));
let mut new_lead_edges: Vec<EdgeRc> = Vec::new();
let mut new_trail_edges: Vec<EdgeRc> = Vec::new();
for (i, base_edge) in face_edges.iter().enumerate() {
base_edge.borrow_mut().take_origin(Ptr::new(& face_vertices[i]));
base_edge.borrow().origin.upgrade().map(|o| o.borrow_mut().take_edge(Ptr::new(base_edge)));
let new_face = Ptr::new_rc(Face::with_edge(self.new_face_id(), Ptr::new(base_edge)));
let leading_edge = Ptr::new_rc(Edge::with_origin(self.new_edge_id(), Ptr::new(& face_vertices[(i + 1) % vertices_len])));
let trailing_edge = Ptr::new_rc(Edge::with_origin(self.new_edge_id(), Ptr::new(& apex_vert)));
base_edge.borrow_mut().take_face(Ptr::new(& new_face));
leading_edge.borrow_mut().take_face(Ptr::new(& new_face));
trailing_edge.borrow_mut().take_face(Ptr::new(& new_face));
base_edge.borrow_mut().take_next(Ptr::new(& leading_edge));
leading_edge.borrow_mut().take_next(Ptr::new(& trailing_edge));
trailing_edge.borrow_mut().take_next(Ptr::new(base_edge));
apex_vert.borrow_mut().take_edge(Ptr::new(& trailing_edge));
new_lead_edges.push(leading_edge.clone());
new_trail_edges.push(trailing_edge.clone());
self.push_edge(leading_edge);
self.push_edge(trailing_edge);
self.push_face(new_face);
}
self.push_vert(apex_vert);
let trail_edge_len = new_trail_edges.len();
debug_assert!(trail_edge_len == 3, "should be 3 new trailing edges");
debug_assert!(new_lead_edges.len() == 3, "should be 3 new leading edges");
for (i, leading_edge) in new_lead_edges.iter().enumerate() {
let trailing_edge = & new_trail_edges[(i + 1) % trail_edge_len];
leading_edge.borrow_mut().take_pair(Ptr::new(trailing_edge));
trailing_edge.borrow_mut().take_pair(Ptr::new(leading_edge));
}
self.faces.remove(& target_face.borrow().id);
}
pub fn triangulate_face_ptr(&mut self, point: Point3<f32>, face: & FacePtr) {
if let Some(face_rc) = face.upgrade() {
self.triangulate_face(point, & face_rc)
}
}
pub fn attach_point_for_faces(&mut self, point: Point3<f32>, remove_faces: &[FaceRc]) -> Result<Vec<FaceRc>, &'static str> {
let outgoing_face_ids: HashSet<u32> = remove_faces.iter().map(|f| f.borrow().id).collect();
let mut horizon_edges: HashMap<u32, EdgeRc> = HashMap::new();
let mut remove_edges: Vec<u32> = Vec::new();
let mut remove_verts: Vec<u32> = Vec::new();
let mut horizon_next_map: HashMap<u32, u32> = HashMap::new();
let mut iter_edge: Option<EdgeRc> = None;
for out_face in remove_faces.iter() {
for face_edge in out_face.borrow().adjacent_edges().to_ptr_vec() {
let remove_edge = face_edge.borrow().pair.upgrade()
.and_then(|p| p.borrow().face.upgrade())
.map_or(true, |f| outgoing_face_ids.contains(& f.borrow().id));
if remove_edge {
remove_edges.push(face_edge.borrow().id);
} else {
face_edge.borrow().get_origin().map(|o| o.borrow_mut().set_edge_rc(& face_edge));
if iter_edge.is_none() { iter_edge = Some(face_edge.clone()); }
horizon_edges.insert(face_edge.borrow().id, face_edge.clone());
}
}
for face_vert in out_face.borrow().adjacent_verts().to_ptr_vec() {
let remove_vert = face_vert.borrow().adjacent_faces()
.all(|face_ptr| {
face_ptr.upgrade()
.map_or(true, |f| outgoing_face_ids.contains(& f.borrow().id))
});
if remove_vert {
remove_verts.push(face_vert.borrow().id);
}
}
}
if iter_edge.is_none() { return Err("No horizon edges found"); }
for h_edge in horizon_edges.values() {
if let Some(target_vert) = h_edge.borrow().get_target() {
for adj_edge in target_vert.borrow().adjacent_edges() {
if let Some(adj_edge_rc) = adj_edge.upgrade() {
let adj_id = adj_edge_rc.borrow().id;
if horizon_edges.contains_key(& adj_id) {
horizon_next_map.insert(h_edge.borrow().id, adj_id);
break;
}
}
}
}
}
let horizon_next_keys: HashSet<u32> = horizon_next_map.keys().cloned().collect();
let horizon_next_values: HashSet<u32> = horizon_next_map.values().cloned().collect();
if horizon_next_keys != horizon_next_values { return Err("Horizon is malformed - it does not form a connected loop"); }
let start_edge = iter_edge.unwrap();
let start_id = start_edge.borrow().id;
let mut iter_id = start_id;
let mut horizon_vec: Vec<EdgeRc> = Vec::new();
loop {
horizon_vec.push(self.edges[& iter_id].clone());
iter_id = horizon_next_map[& iter_id];
if iter_id == start_id { break; }
}
for out_face in remove_faces {
self.faces.remove(&out_face.borrow().id);
}
for out_vert_id in &remove_verts {
self.vertices.remove(out_vert_id);
}
for out_edge_id in &remove_edges {
self.edges.remove(out_edge_id);
}
let apex_vert = Ptr::new_rc(Vert::empty(self.new_vert_id(), point));
let horizon_len = horizon_vec.len();
let mut return_faces: Vec<FaceRc> = Vec::new();
for (idx, base_edge) in horizon_vec.iter().enumerate() {
let next_edge = & horizon_vec[(idx + 1) % horizon_len];
if let Some(next_origin) = next_edge.borrow().origin.upgrade() {
let new_face = Ptr::new_rc(Face::with_edge(self.new_face_id(), Ptr::new(base_edge)));
let new_leading = Ptr::new_rc(Edge::with_origin(self.new_edge_id(), Ptr::new(& next_origin)));
let new_trailing = Ptr::new_rc(Edge::with_origin(self.new_edge_id(), Ptr::new(& apex_vert)));
apex_vert.borrow_mut().set_edge_rc(& new_trailing);
base_edge.borrow_mut().set_next_rc(& new_leading);
new_leading.borrow_mut().set_next_rc(& new_trailing);
new_trailing.borrow_mut().set_next_rc(base_edge);
base_edge.borrow_mut().set_face_rc(& new_face);
new_leading.borrow_mut().set_face_rc(& new_face);
new_trailing.borrow_mut().set_face_rc(& new_face);
self.push_edge(new_leading);
self.push_edge(new_trailing);
return_faces.push(new_face.clone());
self.push_face(new_face);
} else {
return Err("Could not set up horizon faces correctly");
}
}
self.push_vert(apex_vert);
for (idx, base_edge) in horizon_vec.iter().enumerate() {
let next_edge = & horizon_vec[(idx + 1) % horizon_len];
if let (Some(next_rc), Some(pair_rc)) = (base_edge.borrow().get_next(), next_edge.borrow().get_next_next()) {
next_rc.borrow_mut().set_pair_rc(& pair_rc);
pair_rc.borrow_mut().set_pair_rc(& next_rc);
} else {
return Err("Could not connect pair edges");
}
}
Ok(return_faces)
}
pub fn attach_point_for_face_ptrs(&mut self, point: Point3<f32>, faces: &[FacePtr]) -> Result<Vec<FaceRc>, &'static str> {
let face_ptrs = faces.iter().filter_map(|f| f.upgrade()).collect::<Vec<FaceRc>>();
self.attach_point_for_faces(point, &face_ptrs)
}
pub fn remove_vert(&mut self, vert: &VertRc) -> Result<(), &'static str> {
let vert_b = vert.borrow();
let mut edges = vert_b.adjacent_edges().to_ptr_vec();
edges.reverse();
if edges.len() != 3 { return Err("Vertex must have exactly 3 connecting edges"); }
let new_face = Ptr::new_rc(Face::empty(self.new_face_id()));
for (idx, edge) in edges.iter().enumerate() {
let edge_b = edge.borrow();
edge_b.next.upgrade()
.map(|next: EdgeRc| {
let mut next_bm = next.borrow_mut();
next_bm.set_face_rc(& new_face);
next_bm.set_next(& edges[(idx + 1) % edges.len()].borrow().next);
new_face.borrow_mut().set_edge_rc(& next);
next_bm.origin.upgrade()
.map(|o: VertRc| o.borrow_mut().set_edge_rc(& next));
});
edge_b.pair.upgrade()
.map(|p: EdgeRc| self.edges.remove(& p.borrow().id));
self.edges.remove(& edge_b.id);
}
self.push_face(new_face);
for face in vert_b.adjacent_faces() {
face.upgrade().map(|f: FaceRc| self.faces.remove(& f.borrow().id));
}
self.vertices.remove(& vert_b.id);
Ok(())
}
pub fn remove_vert_ptr(&mut self, point: &VertPtr) -> Result<(), &'static str> {
match point.upgrade() {
Some(point_rc) => self.remove_vert(&point_rc),
None => Err("Provided pointer was invalid"),
}
}
pub fn flip_edge(&mut self, _edge: &EdgeRc) {
unimplemented!();
}
pub fn flip_edge_ptr(&mut self, edge: &EdgePtr) {
if let Some(edge_rc) = edge.upgrade() {
self.flip_edge(&edge_rc)
}
}
pub fn split_edge(&mut self, _edge: &EdgeRc, _tval: f32) {
unimplemented!();
}
pub fn split_edge_rc(&mut self, edge: &EdgePtr, tval: f32) {
if let Some(edge_rc) = edge.upgrade() {
self.split_edge(& edge_rc, tval)
}
}
}