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use daggy::{self, Walker};
use daggy::petgraph::visit::{self, Visitable};
use geom;
use geom::{DefaultScalar, Graph};
use geom::graph::Edge;
use math::{self, BaseFloat, Basis3, Euler, Point3, Rad, Rotation, Vector3};
use std::collections::HashMap;
use std::marker::PhantomData;
use std::ops;
pub type Index = daggy::NodeIndex<usize>;
#[derive(Clone, Debug)]
pub enum Node<S = DefaultScalar>
where
S: BaseFloat,
{
Point,
Graph { graph: super::Graph<S>, dfs: Dfs<S> },
}
#[derive(Clone, Debug)]
pub struct TransformedVertices<I, S = DefaultScalar>
where
S: BaseFloat,
{
transform: PreparedTransform<S>,
vertices: I,
}
#[derive(Clone, Debug)]
pub struct TransformedTriangles<I, V, S = DefaultScalar>
where
S: BaseFloat,
{
transform: PreparedTransform<S>,
triangles: I,
_vertex: PhantomData<V>,
}
#[derive(Clone, Debug, PartialEq)]
pub struct Transform<S = DefaultScalar>
where
S: BaseFloat,
{
pub scale: Vector3<S>,
pub rot: Euler<Rad<S>>,
pub disp: Vector3<S>,
}
#[derive(Clone, Debug, PartialEq)]
pub struct PreparedTransform<S = DefaultScalar> {
pub scale: Vector3<S>,
pub rot: Basis3<S>,
pub disp: Vector3<S>,
}
#[derive(Clone, Debug, PartialEq)]
pub struct TransformMap<S = DefaultScalar>
where
S: BaseFloat,
{
map: HashMap<Index, Transform<S>>,
}
#[derive(Clone, Debug)]
pub struct Dfs<S = DefaultScalar>
where
S: BaseFloat,
{
dfs: visit::Dfs<Index, <Graph<S> as Visitable>::Map>,
visited: TransformMap<S>,
}
impl<S> Dfs<S>
where
S: BaseFloat,
{
pub fn new(graph: &Graph<S>) -> Self {
Self::start_from(graph, graph.origin())
}
pub fn start_from(graph: &Graph<S>, start: Index) -> Self {
let dfs = visit::Dfs::new(graph, start);
let visited = TransformMap::default();
Dfs { dfs, visited }
}
pub fn reset(&mut self, graph: &Graph<S>) {
self.dfs.reset(graph);
self.dfs.move_to(graph.origin());
}
pub fn move_to(&mut self, start: Index) {
self.dfs.move_to(start);
}
pub fn next_transform(&mut self, graph: &Graph<S>) -> Option<(Index, Transform<S>)> {
let n = match self.dfs.next(graph) {
None => return None,
Some(n) => n,
};
let mut transform = Transform::default();
for (e, parent) in graph.parents(n).iter(graph) {
let parent_transform = &self.visited[&parent];
let edge = &graph[e];
transform.apply_edge(parent_transform, edge);
}
self.visited.map.insert(n, transform.clone());
Some((n, transform))
}
pub fn next_vertices<F, I>(
&mut self,
graph: &Graph<S>,
vertices_fn: F,
) -> Option<(Index, TransformedVertices<I::IntoIter, S>)>
where
F: FnOnce(&Index) -> I,
I: IntoIterator,
I::Item: ApplyTransform<S>,
{
self.next_transform(graph).map(|(n, transform)| {
let vertices = vertices_fn(&n);
let vertices = vertices.into_iter();
(n, transform.vertices(vertices))
})
}
pub fn next_triangles<F, I, V>(
&mut self,
graph: &Graph<S>,
triangles_fn: F,
) -> Option<(Index, TransformedTriangles<I::IntoIter, V, S>)>
where
F: FnOnce(&Index) -> I,
I: IntoIterator<Item = geom::Tri<V>>,
V: geom::Vertex + ApplyTransform<S>,
{
self.next_transform(graph).map(|(n, transform)| {
let triangles = triangles_fn(&n);
let triangles = triangles.into_iter();
(n, transform.triangles(triangles))
})
}
}
impl<'a, S> Walker<&'a Graph<S>> for Dfs<S>
where
S: BaseFloat,
{
type Item = (Index, Transform<S>);
fn walk_next(&mut self, graph: &'a Graph<S>) -> Option<Self::Item> {
self.next_transform(graph)
}
}
impl<S> Default for TransformMap<S>
where
S: BaseFloat,
{
fn default() -> Self {
TransformMap {
map: Default::default(),
}
}
}
impl<S> ops::Deref for TransformMap<S>
where
S: BaseFloat,
{
type Target = HashMap<Index, Transform<S>>;
fn deref(&self) -> &Self::Target {
&self.map
}
}
impl<S> Into<HashMap<Index, Transform<S>>> for TransformMap<S>
where
S: BaseFloat,
{
fn into(self) -> HashMap<Index, Transform<S>> {
self.map
}
}
impl<S> Transform<S>
where
S: BaseFloat,
{
pub fn apply_edge(&mut self, parent: &Self, edge: &Edge<S>) {
use geom::graph::edge::{Axis, Relative};
match (edge.kind.relative, edge.kind.axis) {
(Relative::Position, Axis::X) => self.disp.x += parent.disp.x + edge.weight,
(Relative::Position, Axis::Y) => self.disp.y += parent.disp.y + edge.weight,
(Relative::Position, Axis::Z) => self.disp.z += parent.disp.z + edge.weight,
(Relative::Orientation, Axis::X) => self.rot.x += parent.rot.x + Rad(edge.weight),
(Relative::Orientation, Axis::Y) => self.rot.y += parent.rot.y + Rad(edge.weight),
(Relative::Orientation, Axis::Z) => self.rot.z += parent.rot.z + Rad(edge.weight),
(Relative::Scale, Axis::X) => self.scale.x *= parent.scale.x * edge.weight,
(Relative::Scale, Axis::Y) => self.scale.y *= parent.scale.y * edge.weight,
(Relative::Scale, Axis::Z) => self.scale.z *= parent.scale.z * edge.weight,
}
}
pub fn prepare(self) -> PreparedTransform<S> {
let Transform { disp, rot, scale } = self;
let rot = Basis3::from(rot);
PreparedTransform { disp, rot, scale }
}
pub fn vertices<I>(self, vertices: I) -> TransformedVertices<I::IntoIter, S>
where
I: IntoIterator,
I::Item: ApplyTransform<S>,
{
let transform = self.prepare();
let vertices = vertices.into_iter();
TransformedVertices {
transform,
vertices,
}
}
pub fn triangles<I, V>(self, triangles: I) -> TransformedTriangles<I::IntoIter, V, S>
where
I: IntoIterator<Item = geom::Tri<V>>,
V: geom::Vertex + ApplyTransform<S>,
{
let transform = self.prepare();
let triangles = triangles.into_iter();
let _vertex = PhantomData;
TransformedTriangles {
transform,
triangles,
_vertex,
}
}
}
impl<S> Default for Transform<S>
where
S: BaseFloat,
{
fn default() -> Self {
let zero = S::zero();
let one = S::one();
let scale = Vector3 {
x: one,
y: one,
z: one,
};
let rot = Euler {
x: Rad(zero),
y: Rad(zero),
z: Rad(zero),
};
let disp = Vector3 {
x: zero,
y: zero,
z: zero,
};
Transform { scale, rot, disp }
}
}
impl<S> math::Transform<Point3<S>> for Transform<S>
where
S: BaseFloat,
{
fn one() -> Self {
let one = S::one();
let (x, y, z) = (one, one, one);
Transform {
scale: Vector3 { x, y, z },
rot: Euler {
x: Rad(x),
y: Rad(y),
z: Rad(z),
},
disp: Vector3 { x, y, z },
}
}
fn look_at(_eye: Point3<S>, _center: Point3<S>, _up: Vector3<S>) -> Self {
unimplemented!();
}
fn transform_vector(&self, _vec: Vector3<S>) -> Vector3<S> {
unimplemented!();
}
fn inverse_transform_vector(&self, _vec: Vector3<S>) -> Option<Vector3<S>> {
unimplemented!();
}
fn transform_point(&self, _point: Point3<S>) -> Point3<S> {
unimplemented!();
}
fn concat(&self, _other: &Self) -> Self {
unimplemented!();
}
fn inverse_transform(&self) -> Option<Self> {
unimplemented!();
}
}
pub fn transform_point<S>(transform: &PreparedTransform<S>, mut point: Point3<S>) -> Point3<S>
where
S: BaseFloat,
{
point.x *= transform.scale.x;
point.y *= transform.scale.y;
point.z *= transform.scale.z;
point = transform.rot.rotate_point(point);
point += transform.disp;
point
}
pub trait ApplyTransform<S>
where
S: BaseFloat,
{
fn apply_transform(self, transform: &PreparedTransform<S>) -> Self;
}
impl<S> ApplyTransform<S> for Point3<S>
where
S: BaseFloat,
{
fn apply_transform(self, transform: &PreparedTransform<S>) -> Self {
transform_point(transform, self)
}
}
impl<I, S> Iterator for TransformedVertices<I, S>
where
I: Iterator,
I::Item: ApplyTransform<S>,
S: BaseFloat,
{
type Item = I::Item;
fn next(&mut self) -> Option<Self::Item> {
self.vertices
.next()
.map(|vertex| vertex.apply_transform(&self.transform))
}
}
impl<I, V, S> Iterator for TransformedTriangles<I, V, S>
where
I: Iterator<Item = geom::Tri<V>>,
V: geom::Vertex + ApplyTransform<S>,
S: BaseFloat,
{
type Item = geom::Tri<V>;
fn next(&mut self) -> Option<Self::Item> {
self.triangles
.next()
.map(|tri| tri.map_vertices(|vertex| vertex.apply_transform(&self.transform)))
}
}