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use super::{GraphMaker, StrError};
use crate::AsMatrix;
use std::fmt::Write;
/// Defines the poly-curve code
///
/// Reference: [Matplotlib](https://matplotlib.org/stable/api/path_api.html)
#[derive(Clone, Copy, Debug)]
pub enum PolyCode {
/// Move to coordinate (first point)
///
/// Matplotlib: Pick up the pen and move to the given vertex.
MoveTo,
/// Segment (next point, need 2 points)
///
/// Matplotlib: Draw a line from the current position to the given vertex.
LineTo,
/// Quadratic Bezier (next point, need 3 control points with the first and last points on the curve)
///
/// Matplotlib: Draw a quadratic Bezier curve from the current position, with the given control point, to the given end point.
Curve3,
/// Cubic Bezier (next point, need 4 control points with the first and last points on the curve)
///
/// Matplotlib: Draw a cubic Bezier curve from the current position, with the given control points, to the given end point.
Curve4,
}
/// Implements functions to draw 2D and 3D features, including poly-lines and Bezier curves
///
/// # Examples
///
/// ## Drawing functions with polyline set by an array
///
/// ```
/// use plotpy::{Canvas, Plot};
///
/// fn main() -> Result<(), &'static str> {
/// // canvas object and common options
/// let mut canvas = Canvas::new();
/// canvas.set_line_width(3.0).set_edge_color("#cd0000").set_face_color("#eeea83");
///
/// // draw arc
/// canvas.draw_arc(0.5, 0.5, 0.4, 195.0, -15.0);
///
/// // draw arrow
/// canvas.set_arrow_scale(50.0).set_arrow_style("fancy");
/// canvas.draw_arrow(0.4, 0.3, 0.6, 0.5);
///
/// // draw circle
/// canvas.set_face_color("None").set_edge_color("#1f9c25").set_line_width(6.0);
/// canvas.draw_circle(0.5, 0.5, 0.5);
///
/// // draw polyline
/// canvas.set_line_width(3.0).set_edge_color("blue");
/// let a = 0.2;
/// let c = f64::sqrt(3.0) / 2.0;
/// let p = &[[0.1, 0.5], [0.1 + a, 0.5], [0.1 + a / 2.0, 0.5 + a * c]];
/// let q = &[[0.9, 0.5], [0.9 - a, 0.5], [0.9 - a / 2.0, 0.5 + a * c]];
/// canvas.draw_polyline(p, true);
/// canvas.draw_polyline(q, false);
///
/// // add canvas to plot
/// let mut plot = Plot::new();
/// plot.set_hide_axes(true)
/// .set_equal_axes(true)
/// .set_range(-0.05, 1.05, -0.05, 1.05)
/// .add(&canvas);
///
/// // save figure
/// plot.save("/tmp/plotpy/doc_tests/doc_canvas.svg")?;
/// Ok(())
/// }
/// ```
///
/// 
///
/// ## Cubic Bezier and use of begin/end functions
///
/// ```
/// use plotpy::{Canvas, Plot, PolyCode, StrError};
///
/// fn main() -> Result<(), StrError> {
/// // codes
/// let data = [
/// (3.0, 0.0, PolyCode::MoveTo),
/// (1.0, 1.5, PolyCode::Curve4),
/// (0.0, 4.0, PolyCode::Curve4),
/// (2.5, 3.9, PolyCode::Curve4),
/// (3.0, 3.8, PolyCode::LineTo),
/// (3.5, 3.9, PolyCode::LineTo),
/// (6.0, 4.0, PolyCode::Curve4),
/// (5.0, 1.5, PolyCode::Curve4),
/// (3.0, 0.0, PolyCode::Curve4),
/// ];
///
/// // polycurve
/// let mut canvas = Canvas::new();
/// canvas.set_face_color("#f88989").set_edge_color("red");
/// canvas.polycurve_begin();
/// for (x, y, code) in data {
/// canvas.polycurve_add(x, y, code);
/// }
/// canvas.polycurve_end(true);
///
/// // add canvas to plot
/// let mut plot = Plot::new();
/// plot.add(&canvas);
///
/// // save figure
/// plot.set_range(1.0, 5.0, 0.0, 4.0)
/// .set_frame_borders(false)
/// .set_hide_axes(true)
/// .set_equal_axes(true)
/// .set_show_errors(true);
/// plot.save("/tmp/plotpy/doc_tests/doc_canvas_polycurve.svg")?;
/// Ok(())
/// }
/// ```
///
/// 
///
/// See also integration tests in the [tests directory](https://github.com/cpmech/plotpy/tree/main/tests)
pub struct Canvas {
// features
edge_color: String, // Edge color (shared)
face_color: String, // Face color (shared)
line_width: f64, // Line width of edge (shared)
arrow_scale: f64, // Arrow scale
arrow_style: String, // Arrow style
// text
text_color: String, // Text color
text_align_horizontal: String, // Horizontal alignment
text_align_vertical: String, // Vertical alignment
text_fontsize: f64, // Font size
text_rotation: f64, // Text rotation
// alternative text
alt_text_color: String, // Text color
alt_text_align_horizontal: String, // Horizontal alignment
alt_text_align_vertical: String, // Vertical alignment
alt_text_fontsize: f64, // Font size
alt_text_rotation: f64, // Text rotation
// options
stop_clip: bool, // Stop clipping features within margins
// buffer
buffer: String, // buffer
}
impl Canvas {
pub fn new() -> Self {
Canvas {
// features
edge_color: "#427ce5".to_string(),
face_color: String::new(),
line_width: 0.0,
arrow_scale: 0.0,
arrow_style: String::new(),
// text
text_color: "#a81414".to_string(),
text_align_horizontal: String::new(),
text_align_vertical: String::new(),
text_fontsize: 8.0,
text_rotation: 45.0,
// alternative text
alt_text_color: "#343434".to_string(),
alt_text_align_horizontal: "center".to_string(),
alt_text_align_vertical: "center".to_string(),
alt_text_fontsize: 10.0,
alt_text_rotation: 0.0,
// options
stop_clip: false,
// buffer
buffer: String::new(),
}
}
/// Draws arc (2D only)
pub fn draw_arc<T>(&mut self, xc: T, yc: T, r: T, ini_angle: T, fin_angle: T)
where
T: std::fmt::Display,
{
let opt = self.options_shared();
write!(
&mut self.buffer,
"p=pat.Arc(({},{}),2*{},2*{},theta1={},theta2={},angle=0{})\n\
plt.gca().add_patch(p)\n",
xc, yc, r, r, ini_angle, fin_angle, &opt
)
.unwrap();
}
/// Draws arrow (2D only)
pub fn draw_arrow<T>(&mut self, xi: T, yi: T, xf: T, yf: T)
where
T: std::fmt::Display,
{
let opt_shared = self.options_shared();
let opt_arrow = self.options_arrow();
write!(
&mut self.buffer,
"p=pat.FancyArrowPatch(({},{}),({},{})\
,shrinkA=0,shrinkB=0\
,path_effects=[pff.Stroke(joinstyle='miter')]\
{}{})\n\
plt.gca().add_patch(p)\n",
xi, yi, xf, yf, &opt_shared, &&opt_arrow,
)
.unwrap();
}
/// Draws circle (2D only)
pub fn draw_circle<T>(&mut self, xc: T, yc: T, r: T)
where
T: std::fmt::Display,
{
let opt = self.options_shared();
write!(
&mut self.buffer,
"p=pat.Circle(({},{}),{}{})\n\
plt.gca().add_patch(p)\n",
xc, yc, r, &opt
)
.unwrap();
}
/// Begins drawing a polycurve (straight segments, quadratic Bezier, and cubic Bezier) (2D only)
///
/// # Warning
///
/// You must call [Canvas::polycurve_add] next, followed by [Canvas::polycurve_end] when finishing adding points.
/// Otherwise, Python/Matplotlib will fail.
pub fn polycurve_begin(&mut self) -> &mut Self {
write!(&mut self.buffer, "dat=[",).unwrap();
self
}
/// Adds point to a polycurve (straight segments, quadratic Bezier, and cubic Bezier) (2D only)
///
/// # Warning
///
/// You must call [Canvas::polycurve_begin] first, otherwise Python/Matplotlib will fail.
/// Afterwards, you must call [Canvas::polycurve_end] when finishing adding points.
pub fn polycurve_add<T>(&mut self, x: T, y: T, code: PolyCode) -> &mut Self
where
T: std::fmt::Display,
{
let keyword = match code {
PolyCode::MoveTo => "MOVETO",
PolyCode::LineTo => "LINETO",
PolyCode::Curve3 => "CURVE3",
PolyCode::Curve4 => "CURVE4",
};
write!(&mut self.buffer, "[pth.Path.{},({},{})],", keyword, x, y).unwrap();
self
}
/// Ends drawing a polycurve (straight segments, quadratic Bezier, and cubic Bezier) (2D only)
///
/// # Warning
///
/// This function must be the last one called after [Canvas::polycurve_begin] and [Canvas::polycurve_add].
/// Otherwise, Python/Matplotlib will fail.
pub fn polycurve_end(&mut self, closed: bool) -> &mut Self {
if closed {
write!(&mut self.buffer, "[pth.Path.CLOSEPOLY,(None,None)]").unwrap();
}
let opt = self.options_shared();
write!(
&mut self.buffer,
"]\n\
cmd,pts=zip(*dat)\n\
h=pth.Path(pts,cmd)\n\
p=pat.PathPatch(h{})\n\
plt.gca().add_patch(p)\n",
&opt
)
.unwrap();
self
}
/// Draws polyline with straight segments, quadratic Bezier, or cubic Bezier (2D only)
///
/// **Note:** The first and last commands are ignored.
pub fn draw_polycurve<'a, T, U>(&mut self, points: &'a T, codes: &[PolyCode], closed: bool) -> Result<(), StrError>
where
T: AsMatrix<'a, U>,
U: 'a + std::fmt::Display,
{
let (npoint, ndim) = points.size();
if npoint < 3 {
return Err("npoint must be ≥ 3");
}
if ndim != 2 {
return Err("ndim must be equal to 2");
}
if codes.len() != npoint {
return Err("codes.len() must be equal to npoint");
}
write!(
&mut self.buffer,
"dat=[[pth.Path.MOVETO,({},{})]",
points.at(0, 0),
points.at(0, 1)
)
.unwrap();
for i in 1..npoint {
let keyword = match codes[i] {
PolyCode::MoveTo => "MOVETO",
PolyCode::LineTo => "LINETO",
PolyCode::Curve3 => "CURVE3",
PolyCode::Curve4 => "CURVE4",
};
write!(
&mut self.buffer,
",[pth.Path.{},({},{})]",
keyword,
points.at(i, 0),
points.at(i, 1)
)
.unwrap();
}
if closed {
write!(&mut self.buffer, ",[pth.Path.CLOSEPOLY,(None,None)]").unwrap();
}
let opt = self.options_shared();
write!(
&mut self.buffer,
"]\n\
cmd,pts=zip(*dat)\n\
h=pth.Path(pts,cmd)\n\
p=pat.PathPatch(h{})\n\
plt.gca().add_patch(p)\n",
&opt
)
.unwrap();
Ok(())
}
/// Begins adding points to a 3D polyline
///
/// # Warning
///
/// This function must be followed by [Canvas::polyline_3d_add] and [Canvas::polyline_3d_end],
/// otherwise Python/Matplotlib will fail
pub fn polyline_3d_begin(&mut self) -> &mut Self {
write!(&mut self.buffer, "xyz=np.array([").unwrap();
self
}
/// Adds point to a 3D polyline
///
/// # Warning
///
/// This function must be called after [Canvas::polyline_3d_begin] and must be followed by [Canvas::polyline_3d_end],
/// otherwise Python/Matplotlib will fail.
pub fn polyline_3d_add<T>(&mut self, x: T, y: T, z: T) -> &mut Self
where
T: std::fmt::Display,
{
write!(&mut self.buffer, "[{},{},{}],", x, y, z).unwrap();
self
}
/// Ends adding points to a 3D polyline
///
/// # Warning
///
/// This function must be called after [Canvas::polyline_3d_begin] and [Canvas::polyline_3d_add],
/// otherwise Python/Matplotlib will fail.
pub fn polyline_3d_end(&mut self) -> &mut Self {
let opt = self.options_line_3d();
write!(
&mut self.buffer,
"])\nax3d().plot(xyz[:,0],xyz[:,1],xyz[:,2]{})\n",
&opt
)
.unwrap();
self
}
/// Draws polyline (2D or 3D)
pub fn draw_polyline<'a, T, U>(&mut self, points: &'a T, closed: bool)
where
T: AsMatrix<'a, U>,
U: 'a + std::fmt::Display,
{
let (npoint, ndim) = points.size();
if npoint < 2 {
return;
}
if ndim == 2 {
write!(
&mut self.buffer,
"dat=[[pth.Path.MOVETO,({},{})]",
points.at(0, 0),
points.at(0, 1)
)
.unwrap();
for i in 1..npoint {
write!(
&mut self.buffer,
",[pth.Path.LINETO,({},{})]",
points.at(i, 0),
points.at(i, 1)
)
.unwrap();
}
if closed {
write!(&mut self.buffer, ",[pth.Path.CLOSEPOLY,(None,None)]").unwrap();
}
let opt = self.options_shared();
write!(
&mut self.buffer,
"]\n\
cmd,pts=zip(*dat)\n\
h=pth.Path(pts,cmd)\n\
p=pat.PathPatch(h{})\n\
plt.gca().add_patch(p)\n",
&opt
)
.unwrap();
}
if ndim == 3 {
self.polyline_3d_begin();
for i in 0..npoint {
self.polyline_3d_add(points.at(i, 0), points.at(i, 1), points.at(i, 2));
}
if closed && npoint > 2 {
self.polyline_3d_add(points.at(0, 0), points.at(0, 1), points.at(0, 2));
}
self.polyline_3d_end();
}
}
/// Draws a 2D or 3D grid
///
/// # Input
///
/// * `xmin, xmax` -- min and max coordinates (len = 2 or 3 == ndim)
/// * `ndiv` -- number of divisions along each dimension (len = 2 or 3 == ndim)
pub fn draw_grid(
&mut self,
xmin: &[f64],
xmax: &[f64],
ndiv: &[usize],
with_point_ids: bool,
with_cell_ids: bool,
) -> Result<(), StrError> {
// check input
let ndim = ndiv.len();
if ndim < 2 || ndim > 3 {
return Err("len(ndiv) == ndim must be 2 or 3");
}
if xmin.len() != ndim {
return Err("size of xmin must equal ndim == len(ndiv)");
}
if xmax.len() != ndim {
return Err("size of xmax must equal ndim == len(ndiv)");
}
// compute delta
let mut npoint = [1; 3];
let mut delta = [0.0; 3];
for i in 0..ndim {
npoint[i] = ndiv[i] + 1;
delta[i] = xmax[i] - xmin[i];
if delta[i] <= 0.0 {
return Err("xmax must be greater than xmin");
}
delta[i] /= ndiv[i] as f64;
}
// auxiliary points
let mut a = [0.0; 3];
let mut b = [0.0; 3];
// loop over lines
if ndim == 2 {
write!(&mut self.buffer, "dat=[\n").unwrap();
}
let opt = self.options_shared();
let mut id_point = 0;
for k in 0..npoint[2] {
if ndim == 3 {
a[2] = xmin[2] + delta[2] * (k as f64);
b[2] = a[2];
}
// vertical lines
a[1] = xmin[1];
b[1] = xmax[1];
for i in 0..npoint[0] {
a[0] = xmin[0] + delta[0] * (i as f64);
b[0] = a[0];
self.line(ndim, &a, &b);
}
// horizontal lines
a[0] = xmin[0];
b[0] = xmax[0];
for j in 0..npoint[1] {
a[1] = xmin[1] + delta[1] * (j as f64);
b[1] = a[1];
self.line(ndim, &a, &b);
}
// add patch
if ndim == 2 {
write!(
&mut self.buffer,
"]\n\
cmd,pts=zip(*dat)\n\
h=pth.Path(pts,cmd)\n\
p=pat.PathPatch(h{})\n\
plt.gca().add_patch(p)\n",
&opt
)
.unwrap();
}
// labels
if with_point_ids {
for j in 0..npoint[1] {
a[1] = xmin[1] + delta[1] * (j as f64);
for i in 0..npoint[0] {
a[0] = xmin[0] + delta[0] * (i as f64);
let txt = format!("{}", id_point);
self.text(ndim, &a, &txt, false);
id_point += 1;
}
}
}
}
// cell ids
if with_cell_ids {
let mut id_cell = 0;
let nz = if ndim == 2 { 1 } else { ndiv[2] };
for k in 0..nz {
if ndim == 3 {
a[2] = xmin[2] + delta[2] * (k as f64);
b[2] = a[2] + delta[2] / 2.0;
}
for j in 0..ndiv[1] {
a[1] = xmin[1] + delta[1] * (j as f64);
b[1] = a[1] + delta[1] / 2.0;
for i in 0..ndiv[0] {
a[0] = xmin[0] + delta[0] * (i as f64);
b[0] = a[0] + delta[0] / 2.0;
let txt = format!("{}", id_cell);
self.text(ndim, &b, &txt, true);
id_cell += 1;
}
}
}
}
// z-lines
if ndim == 3 {
a[2] = xmin[2];
b[2] = xmax[2];
for j in 0..npoint[1] {
a[1] = xmin[1] + delta[1] * (j as f64);
b[1] = a[1];
for i in 0..npoint[0] {
a[0] = xmin[0] + delta[0] * (i as f64);
b[0] = a[0];
self.line(ndim, &a, &b);
}
}
}
// adjust limits
self.limits(ndim, xmin, xmax);
// done
Ok(())
}
/// Sets the edge color (shared among features)
pub fn set_edge_color(&mut self, color: &str) -> &mut Self {
self.edge_color = String::from(color);
self
}
/// Sets the face color (shared among features)
pub fn set_face_color(&mut self, color: &str) -> &mut Self {
self.face_color = String::from(color);
self
}
/// Sets the line width of edge (shared among features)
pub fn set_line_width(&mut self, width: f64) -> &mut Self {
self.line_width = width;
self
}
/// Sets the arrow scale
pub fn set_arrow_scale(&mut self, scale: f64) -> &mut Self {
self.arrow_scale = scale;
self
}
/// Sets the arrow style
///
/// Options:
///
/// * "`-`" -- Curve : None
/// * "`->`" -- CurveB : head_length=0.4,head_width=0.2
/// * "`-[`" -- BracketB : widthB=1.0,lengthB=0.2,angleB=None
/// * "`-|>`" -- CurveFilledB : head_length=0.4,head_width=0.2
/// * "`<-`" -- CurveA : head_length=0.4,head_width=0.2
/// * "`<->`" -- CurveAB : head_length=0.4,head_width=0.2
/// * "`<|-`" -- CurveFilledA : head_length=0.4,head_width=0.2
/// * "`<|-|>`" -- CurveFilledAB : head_length=0.4,head_width=0.2
/// * "`]-`" -- BracketA : widthA=1.0,lengthA=0.2,angleA=None
/// * "`]-[`" -- BracketAB : widthA=1.0,lengthA=0.2,angleA=None,widthB=1.0,lengthB=0.2,angleB=None
/// * "`fancy`" -- Fancy : head_length=0.4,head_width=0.4,tail_width=0.4
/// * "`simple`" -- Simple : head_length=0.5,head_width=0.5,tail_width=0.2
/// * "`wedge`" -- Wedge : tail_width=0.3,shrink_factor=0.5
/// * "`|-|`" -- BarAB : widthA=1.0,angleA=None,widthB=1.0,angleB=None
/// * As defined in <https://matplotlib.org/stable/api/_as_gen/matplotlib.patches.FancyArrowPatch.html>
pub fn set_arrow_style(&mut self, style: &str) -> &mut Self {
self.arrow_style = String::from(style);
self
}
/// Sets the text color
pub fn set_text_color(&mut self, color: &str) -> &mut Self {
self.text_color = String::from(color);
self
}
/// Sets the text horizontal alignment
///
/// Options: "center", "left", "right"
pub fn set_text_align_horizontal(&mut self, option: &str) -> &mut Self {
self.text_align_horizontal = String::from(option);
self
}
/// Sets the text vertical alignment
///
/// Options: "center", "top", "bottom", "baseline", "center_baseline"
pub fn set_text_align_vertical(&mut self, option: &str) -> &mut Self {
self.text_align_vertical = String::from(option);
self
}
/// Sets the text font size
pub fn set_text_fontsize(&mut self, fontsize: f64) -> &mut Self {
self.text_fontsize = fontsize;
self
}
/// Sets the text rotation
pub fn set_text_rotation(&mut self, rotation: f64) -> &mut Self {
self.text_rotation = rotation;
self
}
/// Sets the alternative text color
pub fn set_alt_text_color(&mut self, color: &str) -> &mut Self {
self.alt_text_color = String::from(color);
self
}
/// Sets the alternative text horizontal alignment
///
/// Options: "center", "left", "right"
pub fn set_alt_text_align_horizontal(&mut self, option: &str) -> &mut Self {
self.alt_text_align_horizontal = String::from(option);
self
}
/// Sets the alternative text vertical alignment
///
/// Options: "center", "top", "bottom", "baseline", "center_baseline"
pub fn set_alt_text_align_vertical(&mut self, option: &str) -> &mut Self {
self.alt_text_align_vertical = String::from(option);
self
}
/// Sets the alternative text font size
pub fn set_alt_text_fontsize(&mut self, fontsize: f64) -> &mut Self {
self.alt_text_fontsize = fontsize;
self
}
/// Sets the alternative text rotation
pub fn set_alt_text_rotation(&mut self, rotation: f64) -> &mut Self {
self.alt_text_rotation = rotation;
self
}
/// Sets the flag to stop clipping features within margins
pub fn set_stop_clip(&mut self, flag: bool) -> &mut Self {
self.stop_clip = flag;
self
}
/// Returns shared options
fn options_shared(&self) -> String {
let mut opt = String::new();
if self.edge_color != "" {
write!(&mut opt, ",edgecolor='{}'", self.edge_color).unwrap();
}
if self.face_color != "" {
write!(&mut opt, ",facecolor='{}'", self.face_color).unwrap();
}
if self.line_width > 0.0 {
write!(&mut opt, ",linewidth={}", self.line_width).unwrap();
}
if self.stop_clip {
write!(&mut opt, ",clip_on=False").unwrap();
}
opt
}
/// Returns options for arrows
fn options_arrow(&self) -> String {
let mut opt = String::new();
if self.arrow_scale > 0.0 {
write!(&mut opt, ",mutation_scale={}", self.arrow_scale).unwrap();
}
if self.arrow_style != "" {
write!(&mut opt, ",arrowstyle='{}'", self.arrow_style).unwrap();
}
opt
}
/// Returns options for text
fn options_text(&self) -> String {
let mut opt = String::new();
if self.text_color != "" {
write!(&mut opt, ",color='{}'", self.text_color).unwrap();
}
if self.text_align_horizontal != "" {
write!(&mut opt, ",ha='{}'", self.text_align_horizontal).unwrap();
}
if self.text_align_vertical != "" {
write!(&mut opt, ",va='{}'", self.text_align_vertical).unwrap();
}
if self.text_fontsize > 0.0 {
write!(&mut opt, ",fontsize={}", self.text_fontsize).unwrap();
}
if self.text_rotation > 0.0 {
write!(&mut opt, ",rotation={}", self.text_rotation).unwrap();
}
opt
}
/// Returns options for alternative text
fn options_alt_text(&self) -> String {
let mut opt = String::new();
if self.alt_text_color != "" {
write!(&mut opt, ",color='{}'", self.alt_text_color).unwrap();
}
if self.alt_text_align_horizontal != "" {
write!(&mut opt, ",ha='{}'", self.alt_text_align_horizontal).unwrap();
}
if self.alt_text_align_vertical != "" {
write!(&mut opt, ",va='{}'", self.alt_text_align_vertical).unwrap();
}
if self.alt_text_fontsize > 0.0 {
write!(&mut opt, ",fontsize={}", self.alt_text_fontsize).unwrap();
}
if self.alt_text_rotation > 0.0 {
write!(&mut opt, ",rotation={}", self.alt_text_rotation).unwrap();
}
opt
}
/// Returns options for 3D line
fn options_line_3d(&self) -> String {
let mut opt = String::new();
if self.edge_color != "" {
write!(&mut opt, ",color='{}'", self.edge_color).unwrap();
}
if self.line_width > 0.0 {
write!(&mut opt, ",linewidth={}", self.line_width).unwrap();
}
opt
}
/// Draws 2D or 3D line
fn line(&mut self, ndim: usize, a: &[f64; 3], b: &[f64; 3]) {
if ndim == 2 {
write!(
&mut self.buffer,
" [pth.Path.MOVETO,({},{})],[pth.Path.LINETO,({},{})],\n",
a[0], a[1], b[0], b[1]
)
.unwrap();
} else {
let opt = self.options_line_3d();
write!(
&mut self.buffer,
"ax3d().plot([{},{}],[{},{}],[{},{}]{})\n",
a[0], b[0], a[1], b[1], a[2], b[2], opt,
)
.unwrap();
}
}
/// Draws 2D or 3D text
fn text(&mut self, ndim: usize, a: &[f64; 3], txt: &str, alternative: bool) {
let opt = if alternative {
self.options_alt_text()
} else {
self.options_text()
};
if ndim == 2 {
write!(&mut self.buffer, "plt.text({},{},'{}'{})\n", a[0], a[1], txt, &opt).unwrap();
} else {
write!(
&mut self.buffer,
"ax3d().text({},{},{},'{}'{})\n",
a[0], a[1], a[2], txt, &opt
)
.unwrap();
}
}
/// Adjust 2D or 3D limits
fn limits(&mut self, ndim: usize, xmin: &[f64], xmax: &[f64]) {
const FACTOR: f64 = 0.1;
let mut gap = [0.0; 3];
for i in 0..ndim {
gap[i] = (xmax[i] - xmin[i]) * FACTOR;
}
if ndim == 2 {
write!(
&mut self.buffer,
"plt.axis([{},{},{},{}])\n",
xmin[0] - gap[0],
xmax[0] + gap[0],
xmin[1] - gap[1],
xmax[1] + gap[1]
)
.unwrap();
} else {
write!(
&mut self.buffer,
"ax3d().set_xlim3d({},{})\n\
ax3d().set_ylim3d({},{})\n\
ax3d().set_zlim3d({},{})\n",
xmin[0] - gap[0],
xmax[0] + gap[0],
xmin[1] - gap[1],
xmax[1] + gap[1],
xmin[2] - gap[2],
xmax[2] + gap[2]
)
.unwrap();
}
}
}
impl GraphMaker for Canvas {
fn get_buffer<'a>(&'a self) -> &'a String {
&self.buffer
}
fn clear_buffer(&mut self) {
self.buffer.clear();
}
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#[cfg(test)]
mod tests {
use super::Canvas;
use crate::{GraphMaker, PolyCode};
#[test]
fn derive_works() {
let code = PolyCode::Curve3;
let clone = code.clone();
let correct = "Curve3";
assert_eq!(format!("{:?}", code), correct);
assert_eq!(format!("{:?}", clone), correct);
}
#[test]
fn new_works() {
let canvas = Canvas::new();
assert_eq!(canvas.edge_color.len(), 7);
assert_eq!(canvas.face_color.len(), 0);
assert_eq!(canvas.line_width, 0.0);
assert_eq!(canvas.arrow_scale, 0.0);
assert_eq!(canvas.arrow_style.len(), 0);
assert_eq!(canvas.text_color.len(), 7);
assert_eq!(canvas.text_align_horizontal.len(), 0);
assert_eq!(canvas.text_align_vertical.len(), 0);
assert_eq!(canvas.text_fontsize, 8.0);
assert_eq!(canvas.text_rotation, 45.0);
assert_eq!(canvas.buffer.len(), 0);
}
#[test]
fn options_shared_works() {
let mut canvas = Canvas::new();
canvas
.set_edge_color("red")
.set_face_color("blue")
.set_line_width(2.5)
.set_stop_clip(true);
let opt = canvas.options_shared();
assert_eq!(
opt,
",edgecolor='red'\
,facecolor='blue'\
,linewidth=2.5\
,clip_on=False"
);
}
#[test]
fn options_arrow_works() {
let mut canvas = Canvas::new();
canvas.set_arrow_scale(25.0).set_arrow_style("fancy");
let opt = canvas.options_arrow();
assert_eq!(
opt,
",mutation_scale=25\
,arrowstyle='fancy'"
);
}
#[test]
fn options_text_works() {
let mut canvas = Canvas::new();
canvas
.set_text_color("red")
.set_text_align_horizontal("center")
.set_text_align_vertical("center")
.set_text_fontsize(8.0)
.set_text_rotation(45.0);
let opt = canvas.options_text();
assert_eq!(
opt,
",color='red'\
,ha='center'\
,va='center'\
,fontsize=8\
,rotation=45"
);
}
#[test]
fn options_alt_text_works() {
let mut canvas = Canvas::new();
canvas
.set_alt_text_color("blue")
.set_alt_text_align_horizontal("right")
.set_alt_text_align_vertical("bottom")
.set_alt_text_fontsize(10.0)
.set_alt_text_rotation(30.0);
let opt = canvas.options_alt_text();
assert_eq!(
opt,
",color='blue'\
,ha='right'\
,va='bottom'\
,fontsize=10\
,rotation=30"
);
}
#[test]
fn options_line_3d_works() {
let mut canvas = Canvas::new();
canvas.set_edge_color("red");
let opt = canvas.options_line_3d();
assert_eq!(opt, ",color='red'");
let mut canvas = Canvas::new();
canvas.set_edge_color("red").set_line_width(5.0);
let opt = canvas.options_line_3d();
assert_eq!(opt, ",color='red',linewidth=5");
}
#[test]
fn line_works() {
let mut canvas = Canvas::new();
let a = [0.0; 3];
let b = [0.0; 3];
canvas.line(2, &a, &b);
canvas.line(3, &a, &b);
assert_eq!(
canvas.buffer,
"\x20\x20\x20\x20[pth.Path.MOVETO,(0,0)],[pth.Path.LINETO,(0,0)],\n\
ax3d().plot([0,0],[0,0],[0,0],color='#427ce5')\n"
);
canvas.clear_buffer();
assert_eq!(canvas.buffer, "");
}
#[test]
fn text_works() {
let mut canvas = Canvas::new();
let a = [0.0; 3];
canvas.text(2, &a, "hello", false);
canvas.text(3, &a, "hello", true);
assert_eq!(
canvas.buffer,
"plt.text(0,0,'hello',color='#a81414',fontsize=8,rotation=45)\n\
ax3d().text(0,0,0,'hello',color='#343434',ha='center',va='center',fontsize=10)\n"
);
}
#[test]
fn limits_works() {
let mut canvas = Canvas::new();
let xmin = [0.0; 3];
let xmax = [0.0; 3];
canvas.limits(2, &xmin, &xmax);
canvas.limits(3, &xmin, &xmax);
assert_eq!(
canvas.buffer,
"plt.axis([0,0,0,0])\n\
ax3d().set_xlim3d(0,0)\n\
ax3d().set_ylim3d(0,0)\n\
ax3d().set_zlim3d(0,0)\n"
);
}
#[test]
fn arc_works() {
let mut canvas = Canvas::new();
canvas.draw_arc(0.0, 0.0, 1.0, 30.0, 60.0);
let b: &str = "p=pat.Arc((0,0),2*1,2*1,theta1=30,theta2=60,angle=0,edgecolor='#427ce5')\n\
plt.gca().add_patch(p)\n";
assert_eq!(canvas.buffer, b);
}
#[test]
fn arrow_woks() {
let mut canvas = Canvas::new();
canvas.draw_arrow(0.0, 0.0, 1.0, 1.0);
let b: &str =
"p=pat.FancyArrowPatch((0,0),(1,1),shrinkA=0,shrinkB=0,path_effects=[pff.Stroke(joinstyle='miter')],edgecolor='#427ce5')\n\
plt.gca().add_patch(p)\n";
assert_eq!(canvas.buffer, b);
}
#[test]
fn circle_works() {
let mut canvas = Canvas::new();
canvas.draw_circle(0.0, 0.0, 1.0);
let b: &str = "p=pat.Circle((0,0),1,edgecolor='#427ce5')\n\
plt.gca().add_patch(p)\n";
assert_eq!(canvas.buffer, b);
}
#[test]
fn polycurve_methods_work() {
// note the following sequence of codes won't work in Matplotlib because Curve3 and Curve4 are wrong
let mut canvas = Canvas::new();
canvas.polycurve_begin();
assert_eq!(canvas.buffer, "dat=[");
canvas.polycurve_add(0, 0, PolyCode::MoveTo);
assert_eq!(canvas.buffer, "dat=[[pth.Path.MOVETO,(0,0)],");
canvas.polycurve_add(1, 0, PolyCode::LineTo);
assert_eq!(canvas.buffer, "dat=[[pth.Path.MOVETO,(0,0)],[pth.Path.LINETO,(1,0)],");
canvas.polycurve_add(2, 0, PolyCode::Curve3);
assert_eq!(
canvas.buffer,
"dat=[[pth.Path.MOVETO,(0,0)],[pth.Path.LINETO,(1,0)],[pth.Path.CURVE3,(2,0)],"
);
canvas.polycurve_add(3, 0, PolyCode::Curve4);
assert_eq!(
canvas.buffer,
"dat=[[pth.Path.MOVETO,(0,0)],[pth.Path.LINETO,(1,0)],[pth.Path.CURVE3,(2,0)],[pth.Path.CURVE4,(3,0)],"
);
canvas.polycurve_end(true);
assert_eq!(
canvas.buffer,
"dat=[[pth.Path.MOVETO,(0,0)],[pth.Path.LINETO,(1,0)],[pth.Path.CURVE3,(2,0)],[pth.Path.CURVE4,(3,0)],[pth.Path.CLOSEPOLY,(None,None)]]\n\
cmd,pts=zip(*dat)\n\
h=pth.Path(pts,cmd)\n\
p=pat.PathPatch(h,edgecolor='#427ce5')\n\
plt.gca().add_patch(p)\n"
);
}
#[test]
fn polycurve_capture_errors() {
let mut canvas = Canvas::new();
assert_eq!(
canvas.draw_polycurve(&[[0, 0]], &[PolyCode::MoveTo], true).err(),
Some("npoint must be ≥ 3")
);
assert_eq!(
canvas
.draw_polycurve(
&[[0], [0], [0]],
&[PolyCode::MoveTo, PolyCode::LineTo, PolyCode::LineTo],
true
)
.err(),
Some("ndim must be equal to 2")
);
assert_eq!(
canvas
.draw_polycurve(&[[0, 0], [0, 0], [0, 0]], &[PolyCode::MoveTo], true)
.err(),
Some("codes.len() must be equal to npoint")
);
}
#[test]
fn polycurve_works() {
let mut canvas = Canvas::new();
let points = &[[0, 0], [1, 0], [1, 1]];
let codes = &[PolyCode::MoveTo, PolyCode::Curve3, PolyCode::Curve3];
canvas.draw_polycurve(points, codes, true).unwrap();
let b: &str = "dat=[[pth.Path.MOVETO,(0,0)],[pth.Path.CURVE3,(1,0)],[pth.Path.CURVE3,(1,1)],[pth.Path.CLOSEPOLY,(None,None)]]\n\
cmd,pts=zip(*dat)\n\
h=pth.Path(pts,cmd)\n\
p=pat.PathPatch(h,edgecolor='#427ce5')\n\
plt.gca().add_patch(p)\n";
assert_eq!(canvas.buffer, b);
}
#[test]
fn polyline_works_2d() {
let mut canvas = Canvas::new();
let points = &[[1.0, 1.0], [2.0, 1.0], [1.5, 1.866]];
canvas.draw_polyline(points, true);
let b: &str = "dat=[[pth.Path.MOVETO,(1,1)],[pth.Path.LINETO,(2,1)],[pth.Path.LINETO,(1.5,1.866)],[pth.Path.CLOSEPOLY,(None,None)]]\n\
cmd,pts=zip(*dat)\n\
h=pth.Path(pts,cmd)\n\
p=pat.PathPatch(h,edgecolor='#427ce5')\n\
plt.gca().add_patch(p)\n";
assert_eq!(canvas.buffer, b);
}
#[test]
fn polyline_3d_methods_work() {
let mut canvas = Canvas::new();
canvas
.polyline_3d_begin()
.polyline_3d_add(1, 2, 3)
.polyline_3d_add(4, 5, 6)
.polyline_3d_end();
let b: &str = "\
xyz=np.array([[1,2,3],[4,5,6],])\n\
ax3d().plot(xyz[:,0],xyz[:,1],xyz[:,2],color='#427ce5')\n";
assert_eq!(canvas.buffer, b);
}
#[test]
fn polyline_works_3d() {
let mut nothing = Canvas::new();
nothing.draw_polyline(&[[0.0, 0.0]], true);
assert_eq!(nothing.buffer, "");
#[rustfmt::skip]
let points = &[
[2.0, 1.0, 0.0],
[0.0, 1.0, 0.0],
[0.0, 1.0, 3.0],
[2.0, 1.0, 3.0],
];
let mut open = Canvas::new();
open.draw_polyline(points, false);
let b: &str = "\
xyz=np.array([[2,1,0],[0,1,0],[0,1,3],[2,1,3],])\n\
ax3d().plot(xyz[:,0],xyz[:,1],xyz[:,2],color='#427ce5')\n";
assert_eq!(open.buffer, b);
let mut closed = Canvas::new();
closed.draw_polyline(points, true);
let b: &str = "\
xyz=np.array([[2,1,0],[0,1,0],[0,1,3],[2,1,3],[2,1,0],])\n\
ax3d().plot(xyz[:,0],xyz[:,1],xyz[:,2],color='#427ce5')\n";
assert_eq!(closed.buffer, b);
#[rustfmt::skip]
let points = &[
[2.0, 1.0, 0.0],
[0.0, 1.0, 0.0],
];
let mut closed_few_points = Canvas::new();
closed_few_points.draw_polyline(points, true);
let b: &str = "\
xyz=np.array([[2,1,0],[0,1,0],])\n\
ax3d().plot(xyz[:,0],xyz[:,1],xyz[:,2],color='#427ce5')\n";
assert_eq!(closed_few_points.buffer, b);
}
#[test]
fn grid_fails_on_wrong_input() {
let mut canvas = Canvas::new();
let res = canvas.draw_grid(&[0.0, 0.0], &[1.0, 1.0], &[1], true, false);
assert_eq!(res, Err("len(ndiv) == ndim must be 2 or 3"));
let res = canvas.draw_grid(&[0.0], &[1.0, 1.0], &[1, 1], true, false);
assert_eq!(res, Err("size of xmin must equal ndim == len(ndiv)"));
let res = canvas.draw_grid(&[0.0, 0.0], &[1.0], &[1, 1], true, false);
assert_eq!(res, Err("size of xmax must equal ndim == len(ndiv)"));
let res = canvas.draw_grid(&[0.0, 0.0], &[0.0, 1.0], &[1, 1], true, false);
assert_eq!(res, Err("xmax must be greater than xmin"));
}
#[test]
fn grid_no_ids_works() {
let mut canvas = Canvas::new();
canvas
.draw_grid(&[0.0, 0.0], &[1.0, 1.0], &[1, 1], false, false)
.unwrap();
let b: &str = "dat=[\n\
\x20\x20\x20\x20[pth.Path.MOVETO,(0,0)],[pth.Path.LINETO,(0,1)],\n\
\x20\x20\x20\x20[pth.Path.MOVETO,(1,0)],[pth.Path.LINETO,(1,1)],\n\
\x20\x20\x20\x20[pth.Path.MOVETO,(0,0)],[pth.Path.LINETO,(1,0)],\n\
\x20\x20\x20\x20[pth.Path.MOVETO,(0,1)],[pth.Path.LINETO,(1,1)],\n\
]\n\
cmd,pts=zip(*dat)\n\
h=pth.Path(pts,cmd)\n\
p=pat.PathPatch(h,edgecolor='#427ce5')\n\
plt.gca().add_patch(p)\n\
plt.axis([-0.1,1.1,-0.1,1.1])\n";
assert_eq!(canvas.buffer, b);
}
#[test]
fn grid_2d_works() {
let mut canvas = Canvas::new();
canvas.draw_grid(&[0.0, 0.0], &[1.0, 1.0], &[1, 1], true, true).unwrap();
let b: &str = "dat=[\n\
\x20\x20\x20\x20[pth.Path.MOVETO,(0,0)],[pth.Path.LINETO,(0,1)],\n\
\x20\x20\x20\x20[pth.Path.MOVETO,(1,0)],[pth.Path.LINETO,(1,1)],\n\
\x20\x20\x20\x20[pth.Path.MOVETO,(0,0)],[pth.Path.LINETO,(1,0)],\n\
\x20\x20\x20\x20[pth.Path.MOVETO,(0,1)],[pth.Path.LINETO,(1,1)],\n\
]\n\
cmd,pts=zip(*dat)\n\
h=pth.Path(pts,cmd)\n\
p=pat.PathPatch(h,edgecolor='#427ce5')\n\
plt.gca().add_patch(p)\n\
plt.text(0,0,'0',color='#a81414',fontsize=8,rotation=45)\n\
plt.text(1,0,'1',color='#a81414',fontsize=8,rotation=45)\n\
plt.text(0,1,'2',color='#a81414',fontsize=8,rotation=45)\n\
plt.text(1,1,'3',color='#a81414',fontsize=8,rotation=45)\n\
plt.text(0.5,0.5,'0',color='#343434',ha='center',va='center',fontsize=10)\n\
plt.axis([-0.1,1.1,-0.1,1.1])\n";
assert_eq!(canvas.buffer, b);
}
#[test]
fn grid_3d_works() {
let mut canvas = Canvas::new();
canvas
.draw_grid(&[0.0, 0.0, 0.0], &[1.0, 1.0, 1.0], &[1, 1, 1], true, true)
.unwrap();
let b: &str = "\
ax3d().plot([0,0],[0,1],[0,0],color='#427ce5')\n\
ax3d().plot([1,1],[0,1],[0,0],color='#427ce5')\n\
ax3d().plot([0,1],[0,0],[0,0],color='#427ce5')\n\
ax3d().plot([0,1],[1,1],[0,0],color='#427ce5')\n\
ax3d().text(0,0,0,'0',color='#a81414',fontsize=8,rotation=45)\n\
ax3d().text(1,0,0,'1',color='#a81414',fontsize=8,rotation=45)\n\
ax3d().text(0,1,0,'2',color='#a81414',fontsize=8,rotation=45)\n\
ax3d().text(1,1,0,'3',color='#a81414',fontsize=8,rotation=45)\n\
ax3d().plot([0,0],[0,1],[1,1],color='#427ce5')\n\
ax3d().plot([1,1],[0,1],[1,1],color='#427ce5')\n\
ax3d().plot([0,1],[0,0],[1,1],color='#427ce5')\n\
ax3d().plot([0,1],[1,1],[1,1],color='#427ce5')\n\
ax3d().text(0,0,1,'4',color='#a81414',fontsize=8,rotation=45)\n\
ax3d().text(1,0,1,'5',color='#a81414',fontsize=8,rotation=45)\n\
ax3d().text(0,1,1,'6',color='#a81414',fontsize=8,rotation=45)\n\
ax3d().text(1,1,1,'7',color='#a81414',fontsize=8,rotation=45)\n\
ax3d().text(0.5,0.5,0.5,'0',color='#343434',ha='center',va='center',fontsize=10)\n\
ax3d().plot([0,0],[0,0],[0,1],color='#427ce5')\n\
ax3d().plot([1,1],[0,0],[0,1],color='#427ce5')\n\
ax3d().plot([0,0],[1,1],[0,1],color='#427ce5')\n\
ax3d().plot([1,1],[1,1],[0,1],color='#427ce5')\n\
ax3d().set_xlim3d(-0.1,1.1)\n\
ax3d().set_ylim3d(-0.1,1.1)\n\
ax3d().set_zlim3d(-0.1,1.1)\n";
assert_eq!(canvas.buffer, b);
}
}