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use std::fmt;
use crate::*;
#[derive(Debug, PartialEq, PartialOrd, Ord, Eq, Clone, Hash)]
pub struct Polygon2D<P>
where
P: Is2D,
{
pc: PointCloud2D<P>,
}
impl<P> IsPolygon<P> for Polygon2D<P>
where
P: Is2D + Clone,
{
fn num_segments(&self) -> usize {
self.pc.len()
}
fn segment_vertex_ids(&self, segmentid: SId) -> Result<(VId, VId)> {
if segmentid.val >= self.pc.len() {
Err(ErrorKind::IncorrectSegmentID)
} else if segmentid.val == self.pc.len() - 1 {
Ok((VId { val: segmentid.val }, VId { val: 0 }))
} else {
Ok((
VId { val: segmentid.val },
VId {
val: segmentid.val + 1,
},
))
}
}
fn segment_vertices(&self, segmentid: SId) -> Result<(P, P)> {
let (vid1, vid2) = self.segment_vertex_ids(segmentid)?;
Ok((self.pc[vid1.val].clone(), self.pc[vid2.val].clone()))
}
fn vertex(&self, vertexid: VId) -> Result<P> {
if vertexid.val >= self.pc.len() {
Err(ErrorKind::IncorrectVertexID)
} else {
Ok(self.pc[vertexid.val].clone())
}
}
}
impl<P> IsEditablePolygon<P> for Polygon2D<P>
where
P: Is2D + Clone,
{
fn add_vertex(&mut self, vertex: P) -> VId {
self.pc.data.push(vertex);
VId {
val: self.pc.len() - 1,
}
}
fn change_vertex(&mut self, vertexid: VId, vertex: P) -> Result<()> {
if vertexid.val >= self.pc.len() {
return Err(ErrorKind::IncorrectVertexID);
}
self.pc[vertexid.val] = vertex;
Ok(())
}
}
impl<P> IsMovable2D for Polygon2D<P>
where
P: Is2D + IsMovable2D,
{
fn move_by(&mut self, x: f64, y: f64) {
self.pc.move_by(x, y)
}
}
impl<P> HasBoundingBox2DMaybe for Polygon2D<P>
where
P: Is2D,
{
fn bounding_box_maybe(&self) -> Result<BoundingBox2D> {
self.pc.bounding_box_maybe()
}
}
impl<P> HasCenterOfGravity2D for Polygon2D<P>
where
P: Is2D,
{
fn center_of_gravity(&self) -> Result<Point2D> {
self.pc.center_of_gravity()
}
}
impl<P> HasLength for Polygon2D<P>
where
P: Is2D,
{
fn length(&self) -> f64 {
let mut length = self.pc.length();
if self.pc.data.len() > 0 {
length += dist_2d(&self.pc.data[self.pc.data.len() - 1], &self.pc.data[0]);
}
length
}
}
impl<P> IsScalable for Polygon2D<P>
where
P: IsEditable2D,
{
fn scale(&mut self, factor: Positive) {
self.pc.scale(factor)
}
}
impl<P> IsMatrix3Transformable for Polygon2D<P>
where
P: Is2D + IsMatrix3Transformable + Clone,
{
fn transformed(&self, m: &Matrix3) -> Self {
let mut new = self.clone();
new.transform(m);
new
}
fn transform(&mut self, m: &Matrix3) {
self.pc.transform(m);
}
}
impl<P> fmt::Display for Polygon2D<P>
where
P: Is2D + fmt::Display,
{
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.pc.fmt(f)
}
}
impl<P> Default for Polygon2D<P>
where
P: Is2D,
{
fn default() -> Self {
let pc = PointCloud2D::default();
Polygon2D { pc }
}
}
impl<P> From<PointCloud2D<P>> for Polygon2D<P>
where
P: Is2D,
{
fn from(pc: PointCloud2D<P>) -> Self {
Polygon2D { pc }
}
}