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364
src/main.rs
364
src/main.rs
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@ -27,14 +27,14 @@ use macroquad::prelude::Color;
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use macroquad::input::MouseButton;
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use std::sync::Arc;
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const BG: Color = Color::new(0.16863, 0.23922, 0.21176, 1.0);
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const FG: Color = Color::new(0.91569, 0.71765, 0.00000, 1.0);
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const BG: Color = Color::new(0.16863, 0.23922, 0.21176, 1.0);
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const FG: Color = Color::new(0.91569, 0.71765, 0.00000, 1.0);
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const DIM_FG: Color = Color::new(0.29412, 0.27451, 0.13333, 1.0);
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const HIL_FG: Color = Color::new(0.25806, 0.61290, 1.09032, 1.0);
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const SPEED: f64 = 0.1;
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const SPEED: f64 = 0.1;
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const BOING_RADIUS: f64 = 30.0;
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const HILITE: bool = false;
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const HILITE: bool = false;
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#[macroquad::main("BasicShapes")]
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async fn main() {
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@ -343,72 +343,72 @@ impl Triangle {
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c.distance(point) < r
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}
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pub fn common_edge(&self, other: &Triangle) -> Result<&Edge, String> {
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let common_edge = self.edges.iter()
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.filter(|e| other.edges.contains(e))
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.collect::<Vec<_>>();
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pub fn common_edge(&self, other: &Triangle) -> Result<&Edge, String> {
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let common_edge = self.edges.iter()
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.filter(|e| other.edges.contains(e))
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.collect::<Vec<_>>();
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if common_edge.len() > 1 {
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Err(format!(
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"Tried to call common_edge on two triangles which share more \
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than one common edge?: {:?} and {:?}.",
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self, other
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))
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} else if let Some(common_edge) = common_edge.first() {
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Ok(common_edge)
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} else {
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Err(format!(
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"Tried to call common_edge on two triangles which don't \
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share a common edges: {:?} and {:?}.",
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self, other
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))
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}
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}
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if common_edge.len() > 1 {
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Err(format!(
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"Tried to call common_edge on two triangles which share more \
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than one common edge?: {:?} and {:?}.",
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self, other
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))
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} else if let Some(common_edge) = common_edge.first() {
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Ok(common_edge)
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} else {
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Err(format!(
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"Tried to call common_edge on two triangles which don't \
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share a common edges: {:?} and {:?}.",
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self, other
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))
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}
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}
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pub fn point_not_on(&self, edge: &Edge) -> Result<&NodeRef, String> {
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self.nodes.iter()
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.filter(|n|
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!Arc::ptr_eq(n, &edge.0) &&
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!Arc::ptr_eq(n, &edge.1)
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)
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.next()
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.ok_or_else(||format!(
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".point_not_on called on {:?} with edge {:?}, but no points were found \
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not on this edge",
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self, edge
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))
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}
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pub fn point_not_on(&self, edge: &Edge) -> Result<&NodeRef, String> {
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self.nodes.iter()
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.filter(|n|
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!Arc::ptr_eq(n, &edge.0) &&
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!Arc::ptr_eq(n, &edge.1)
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)
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.next()
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.ok_or_else(||format!(
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".point_not_on called on {:?} with edge {:?}, but no points were found \
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not on this edge",
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self, edge
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))
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}
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pub fn invalidated_by_neighbor(&self, other: &Triangle) -> Result<bool, String> {
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pub fn invalidated_by_neighbor(&self, other: &Triangle) -> Result<bool, String> {
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let common_edge = self.common_edge(other)?;
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let common_edge = self.common_edge(other)?;
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let self_point = self.point_not_on(common_edge)?;
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let othr_point = other.point_not_on(common_edge)?;
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let self_point = self.point_not_on(common_edge)?;
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let othr_point = other.point_not_on(common_edge)?;
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let common_distance = common_edge.0.get().distance(*common_edge.1.get());
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let self_sidea = common_edge.0.get().distance(*self_point.get());
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let self_sideb = common_edge.1.get().distance(*self_point.get());
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let othr_sidea = common_edge.0.get().distance(*othr_point.get());
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let othr_sideb = common_edge.1.get().distance(*othr_point.get());
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let common_distance = common_edge.0.get().distance(*common_edge.1.get());
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let self_sidea = common_edge.0.get().distance(*self_point.get());
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let self_sideb = common_edge.1.get().distance(*self_point.get());
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let othr_sidea = common_edge.0.get().distance(*othr_point.get());
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let othr_sideb = common_edge.1.get().distance(*othr_point.get());
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let self_angle = f64::acos(
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(
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self_sidea.powf(2.0)
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+ self_sideb.powf(2.0)
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- common_distance.powf(2.0)
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) / (2.0 * self_sidea * self_sideb)
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);
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let othr_angle = f64::acos(
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(
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othr_sidea.powf(2.0)
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+ othr_sideb.powf(2.0)
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- common_distance.powf(2.0)
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) / (2.0 * othr_sidea * othr_sideb)
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);
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let self_angle = f64::acos(
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(
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self_sidea.powf(2.0)
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+ self_sideb.powf(2.0)
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- common_distance.powf(2.0)
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) / (2.0 * self_sidea * self_sideb)
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);
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let othr_angle = f64::acos(
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(
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othr_sidea.powf(2.0)
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+ othr_sideb.powf(2.0)
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- common_distance.powf(2.0)
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) / (2.0 * othr_sidea * othr_sideb)
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);
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return Ok(self_angle + othr_angle > PI)
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}
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return Ok(self_angle + othr_angle > PI)
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}
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}
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impl PartialEq for Triangle {
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@ -577,10 +577,10 @@ impl DelaunayDemo {
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self.move_point(node);
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}
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}
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if let Err(msg) = self.re_delaunize() {
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eprintln!("POISONED: {}", msg);
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self.poisoned = true;
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}
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if let Err(msg) = self.re_delaunize() {
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eprintln!("POISONED: {}", msg);
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self.poisoned = true;
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}
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}
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fn click(&mut self, pos: Vec2) {
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@ -773,139 +773,139 @@ impl DelaunayDemo {
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new_pos.1.x = -new_pos.1.x;
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}
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node.set(node_inner);
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node.set(new_pos);
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}
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fn get_neighbors(&self, triangle: &Triangle) -> Result<Vec<&Triangle>, String> {
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triangle.edges.iter()
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.filter_map(|e|
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match self.adjacency.get(e) {
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Some((Occupant(a), Friend(b))) => {
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if a != triangle && b == triangle {
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Some(Ok(a))
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} else if a == triangle && b != triangle {
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Some(Ok(b))
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} else if a == triangle && b == triangle {
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Some(Err(format!(
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"{:?} has {:?} in adjacency graph which lists itself as \
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its own neighbor",
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triangle, e
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)))
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} else {
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Some(Err(format!(
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"{:?} has {:?}, but the adjacency graph reports that the \
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triangles next to this edge are {:?} and {:?}",
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triangle, e, a, b
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)))
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}
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},
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Some((Border, Friend(tri))) => {
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if tri == triangle {
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None
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} else {
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Some(Err(format!(
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"{:?} has {:?}, but the adjacency graph reports that \
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this edge is an edge between the graph hull and {:?}",
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triangle, e, tri
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)))
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}
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},
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Some((Occupant(tri), Hole)) => {
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if tri == triangle {
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None
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} else {
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Some(Err(format!(
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"{:?} has {:?}, but the adjacency graph reports that \
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this edge is an edge between a polygonal hole and {:?}",
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triangle, e, tri
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)))
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}
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},
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Some((Border, Hole)) => {
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Some(Err(format!(
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"{:?} has {:?}, but the adjacency graph lists this edge as \
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being between the graph hull and a polygonal hole (aka, it \
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has no neighbors",
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triangle, e
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)))
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},
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None => {
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Some(Err(format!(
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"get_neighbors called on {:?}, but its edge {:?} is not \
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present in the adjacency graph.",
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triangle, e
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)))
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},
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}
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)
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.collect()
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}
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fn get_neighbors(&self, triangle: &Triangle) -> Result<Vec<&Triangle>, String> {
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triangle.edges.iter()
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.filter_map(|e|
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match self.adjacency.get(e) {
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Some((Occupant(a), Friend(b))) => {
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if a != triangle && b == triangle {
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Some(Ok(a))
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} else if a == triangle && b != triangle {
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Some(Ok(b))
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} else if a == triangle && b == triangle {
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Some(Err(format!(
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"{:?} has {:?} in adjacency graph which lists itself as \
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its own neighbor",
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triangle, e
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)))
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} else {
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Some(Err(format!(
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"{:?} has {:?}, but the adjacency graph reports that the \
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triangles next to this edge are {:?} and {:?}",
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triangle, e, a, b
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)))
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}
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},
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Some((Border, Friend(tri))) => {
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if tri == triangle {
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None
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} else {
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Some(Err(format!(
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"{:?} has {:?}, but the adjacency graph reports that \
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this edge is an edge between the graph hull and {:?}",
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triangle, e, tri
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)))
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}
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},
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Some((Occupant(tri), Hole)) => {
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if tri == triangle {
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None
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} else {
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Some(Err(format!(
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"{:?} has {:?}, but the adjacency graph reports that \
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this edge is an edge between a polygonal hole and {:?}",
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triangle, e, tri
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)))
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}
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},
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Some((Border, Hole)) => {
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Some(Err(format!(
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"{:?} has {:?}, but the adjacency graph lists this edge as \
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being between the graph hull and a polygonal hole (aka, it \
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has no neighbors",
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triangle, e
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)))
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},
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None => {
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Some(Err(format!(
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"get_neighbors called on {:?}, but its edge {:?} is not \
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present in the adjacency graph.",
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triangle, e
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)))
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},
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}
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)
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.collect()
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}
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fn flip_triangles(
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&mut self,
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tri1: &Triangle,
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tri2: &Triangle
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) -> Result<(Triangle, &Triangle), String> {
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let mut indices = self.triangles.iter()
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.enumerate()
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.filter(|(_, t)| t == &tri1 || t == &tri2)
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.map(|(i, _)| i);
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let err = || format!(
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"flip_triangles called on {:?} and {:?}, but not both of these were found in \
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the list of triangles",
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tri1, tri2
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);
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fn flip_triangles(
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&mut self,
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tri1: &Triangle,
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tri2: &Triangle
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) -> Result<(Triangle, &Triangle), String> {
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let mut indices = self.triangles.iter()
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.enumerate()
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.filter(|(_, t)| t == &tri1 || t == &tri2)
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.map(|(i, _)| i);
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let err = || format!(
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"flip_triangles called on {:?} and {:?}, but not both of these were found in \
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the list of triangles",
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tri1, tri2
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);
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let mut indices = [
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indices.next().ok_or_else(err)?,
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indices.next().ok_or_else(err)?,
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];
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indices.sort_unstable();
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let mut indices = [
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indices.next().ok_or_else(err)?,
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indices.next().ok_or_else(err)?,
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];
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indices.sort_unstable();
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let tri1 = self.remove_triangle(indices[1])?;
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let tri2 = self.remove_triangle(indices[0])?;
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let tri1 = self.remove_triangle(indices[1])?;
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let tri2 = self.remove_triangle(indices[0])?;
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let common_edge = tri1.common_edge(&tri2)?;
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let common_edge = tri1.common_edge(&tri2)?;
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let tri1_point = tri1.point_not_on(common_edge)?;
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let tri2_point = tri2.point_not_on(common_edge)?;
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let tri1_point = tri1.point_not_on(common_edge)?;
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let tri2_point = tri2.point_not_on(common_edge)?;
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Ok((
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self.create_triangle([
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Edge(tri1_point.clone(), common_edge.0.clone()),
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Edge(tri2_point.clone(), common_edge.0.clone()),
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Edge(tri1_point.clone(), tri2_point.clone()),
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])?.clone(),
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self.create_triangle([
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Edge(tri1_point.clone(), common_edge.1.clone()),
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Edge(tri2_point.clone(), common_edge.1.clone()),
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Edge(tri1_point.clone(), tri2_point.clone()),
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])?,
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))
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}
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Ok((
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self.create_triangle([
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Edge(tri1_point.clone(), common_edge.0.clone()),
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Edge(tri2_point.clone(), common_edge.0.clone()),
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Edge(tri1_point.clone(), tri2_point.clone()),
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])?.clone(),
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self.create_triangle([
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Edge(tri1_point.clone(), common_edge.1.clone()),
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Edge(tri2_point.clone(), common_edge.1.clone()),
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Edge(tri1_point.clone(), tri2_point.clone()),
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])?,
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))
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}
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fn re_delaunize(&mut self) -> Result<(), String> {
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fn re_delaunize(&mut self) -> Result<(), String> {
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let mut i = 0;
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while i < self.triangles.len() {
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while i < self.triangles.len() {
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let triangle = &self.triangles[i];
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let neighbors: Vec<_> = self.get_neighbors(triangle)?
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.into_iter()
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.cloned()
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.collect();
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let neighbors: Vec<_> = self.get_neighbors(triangle)?
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.into_iter()
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.cloned()
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.collect();
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let mut flipped = false;
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for neighbor in neighbors {
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if triangle.invalidated_by_neighbor(&neighbor)? {
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for neighbor in neighbors {
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if triangle.invalidated_by_neighbor(&neighbor)? {
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let triangle = triangle.clone();
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self.flip_triangles(&triangle, &neighbor)?;
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self.flip_triangles(&triangle, &neighbor)?;
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i = 0;
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flipped = true;
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break;
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}
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}
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}
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}
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if !flipped {
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i = i + 1;
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}
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}
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Ok(())
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}
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}
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Ok(())
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}
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}
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