use itertools::Itertools;
use integral_geometry::{Line, Point, Size};
use land2d::Land2D;
use outline_template::OutlineTemplate;
pub struct OutlinePoints {
pub islands: Vec<Vec<Point>>,
pub fill_points: Vec<Point>,
pub size: Size,
}
impl OutlinePoints {
pub fn from_outline_template<I: Iterator<Item = u32>>(
outline_template: &OutlineTemplate,
random_numbers: &mut I,
) -> Self {
Self {
islands: outline_template
.islands
.iter()
.map(|i| {
i.iter()
.zip(random_numbers.tuples())
.map(|(rect, (rnd_a, rnd_b))| {
Point::new(
rect.x + (rnd_a % rect.width) as i32,
rect.y + (rnd_b % rect.height) as i32,
)
}).collect()
}).collect(),
fill_points: outline_template.fill_points.clone(),
size: outline_template.size,
}
}
pub fn total_len(&self) -> usize {
self.islands.iter().map(|i| i.len()).sum::<usize>() + self.fill_points.len()
}
pub fn iter_mut(&mut self) -> impl Iterator<Item = &mut Point> {
self.islands
.iter_mut()
.flat_map(|i| i.iter_mut())
.chain(self.fill_points.iter_mut())
}
fn divide_edge<I: Iterator<Item = u32>>(
&self,
segment: Line,
random_numbers: &mut I,
) -> Option<Point> {
None
}
fn divide_edges<I: Iterator<Item = u32>>(&mut self, random_numbers: &mut I) {
for is in 0..self.islands.len() {
let mut i = 0;
let mut segment;
loop {
{
let island = &self.islands[is];
let mut end_point;
if i < island.len() {
end_point = if i + 1 < island.len() {
island[i + 1]
} else {
island[0]
};
} else {
break;
}
segment = Line::new(island[i], end_point);
}
if let Some(new_point) = self.divide_edge(segment, random_numbers) {
self.islands[is].insert(i + 1, new_point);
i += 2;
} else {
i += 1;
}
}
}
}
pub fn bezierize(&mut self) {
unimplemented!()
}
pub fn distort<I: Iterator<Item = u32>>(&mut self, random_numbers: &mut I) {
loop {
let old_len = self.total_len();
self.divide_edges(random_numbers);
if self.total_len() != old_len {
break;
}
}
self.bezierize();
}
pub fn draw<T: Copy + PartialEq>(&self, land: &mut Land2D<T>, value: T) {
for segment in self.segments_iter() {
land.draw_line(segment, value);
}
}
fn segments_iter(&self) -> OutlineSegmentsIterator {
OutlineSegmentsIterator {
outline: self,
island: 0,
index: 0,
}
}
}
struct OutlineSegmentsIterator<'a> {
outline: &'a OutlinePoints,
island: usize,
index: usize,
}
impl<'a> Iterator for OutlineSegmentsIterator<'a> {
type Item = Line;
fn next(&mut self) -> Option<Self::Item> {
if self.island < self.outline.islands.len() {
if self.index + 1 < self.outline.islands[self.index].len() {
Some(Line::new(
self.outline.islands[self.index][self.index],
self.outline.islands[self.index][self.index + 1],
))
} else if self.index + 1 == self.outline.islands[self.index].len() {
Some(Line::new(
self.outline.islands[self.index][self.index],
self.outline.islands[self.index][0],
))
} else {
self.island += 1;
self.next()
}
} else {
None
}
}
}