rgrow 0.22.0

A modular Tile Assembly Model simulator, inspired by Xgrow.
Documentation 
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use crate::base::{GrowError, GrowResult, NumTiles, Point, Tile};
use crate::canvas::PointSafe2;
use crate::canvas::{Canvas, CanvasCreate};
use ndarray::prelude::*;

use serde::{Deserialize, Serialize};
use std::fmt::Debug;

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct CanvasTubeDiagonals(Array2<Tile>);

impl CanvasTubeDiagonals {
    pub fn half_width(&self) -> usize {
        self.0.nrows() / 2
    }
}

impl CanvasCreate for CanvasTubeDiagonals {
    type Params = (usize, usize);

    fn new_sized(shape: Self::Params) -> GrowResult<Self> {
        let width = shape.0;
        if !width.is_multiple_of(2) {
            Err(GrowError::WrongCanvasSize(width, shape.1))
        } else {
            Ok(Self(Array2::zeros(shape)))
        }
    }

    fn from_array(arr: Array2<Tile>) -> GrowResult<Self> {
        if !arr.shape()[0].is_multiple_of(2) {
            Err(GrowError::WrongCanvasSize(arr.shape()[0], arr.shape()[1]))
        } else {
            Ok(Self(arr))
        }
    }
}

impl Canvas for CanvasTubeDiagonals {
    unsafe fn uv_pr(&self, p: Point) -> &Tile {
        self.0.uget(p)
    }

    unsafe fn uvm_p(&mut self, p: Point) -> &mut Tile {
        self.0.uget_mut(p)
    }

    fn u_move_point_n(&self, p: Point) -> Point {
        if p.0 == 0 {
            (self.nrows() - 1, p.1 - self.half_width())
        } else {
            (p.0 - 1, p.1)
        }
    }

    fn u_move_point_e(&self, p: Point) -> Point {
        if p.0 == 0 {
            (self.nrows() - 1, p.1 - self.half_width() + 1)
        } else {
            (p.0 - 1, p.1 + 1)
        }
    }

    fn u_move_point_s(&self, p: Point) -> Point {
        if p.0 == self.nrows() - 1 {
            (0, p.1 + self.half_width())
        } else {
            (p.0 + 1, p.1)
        }
    }

    fn u_move_point_w(&self, p: Point) -> Point {
        if p.0 == self.nrows() - 1 {
            (0, p.1 + self.half_width() - 1)
        } else {
            (p.0 + 1, p.1 - 1)
        }
    }

    fn inbounds(&self, p: Point) -> bool {
        let (xs, ys) = self.0.dim();
        (p.0 < xs) & (p.1 < ys - 2 - self.half_width()) & (p.1 >= 2 + self.half_width())
    }

    fn calc_n_tiles(&self) -> NumTiles {
        self.0.fold(0, |x, y| x + u32::from(*y != 0))
    }

    fn calc_n_tiles_with_tilearray(&self, should_be_counted: &Array1<bool>) -> NumTiles {
        self.0
            .fold(0, |x, y| x + u32::from(should_be_counted[*y as usize]))
    }

    fn raw_array(&self) -> ArrayView2<'_, Tile> {
        self.0.view()
    }

    fn raw_array_mut(&mut self) -> ArrayViewMut2<'_, Tile> {
        self.0.view_mut()
    }

    fn nrows(&self) -> usize {
        self.0.nrows()
    }

    fn ncols(&self) -> usize {
        self.0.ncols()
    }

    fn draw_size(&self) -> (u32, u32) {
        let s = (self.nrows() + self.ncols()) as u32;
        (s, s)
    }

    fn draw(&self, frame: &mut [u8], colors: &[[u8; 4]]) {
        let s = self.nrows() + self.ncols();
        let mut pi: usize;
        let mut pj: usize;
        let mut pos: usize;

        for ((i, j), t) in self.0.indexed_iter() {
            pj = j;
            pi = i + j;
            pos = 4 * (pi * s + pj);
            frame[pos..pos + 4].copy_from_slice(&colors[*t as usize])
        }
    }

    fn center(&self) -> PointSafe2 {
        PointSafe2((self.nrows() / 2, self.ncols() / 2))
    }

    fn nrows_usable(&self) -> usize {
        self.0.nrows() // FIXME: is this correct?
    }

    fn ncols_usable(&self) -> usize {
        self.0.ncols() // FIXME: is this correct?
    }
}