Add initial docs and clarify licence in Cargo.toml

Cargo.toml

@@ -3,7 +3,7 @@ name = "embedded-plots"
 version = "0.1.0"
 authors = ["Michał Chodzikiewicz <mchodzikiewicz@gmail.com>"]
 edition = "2018"
-license-file = "LICENSE"
+license = "LGPL-2.1-only"
 description = "Heapless plotting library for embedded targets based on embedded-graphics crate"
 homepage = "https://gitlab.com/mchodzikiewicz/embedded-plots"
 repository = "https://gitlab.com/mchodzikiewicz/embedded-plots"

README.md

@@ -1,5 +1,109 @@
 # Embedded Plots
-Heapless plotting library for small embedded targets, based on [embedded-graphics](https://crates.io/crates/embedded-graphics)
+ Heapless plotting library for small embedded targets, based on [embedded-graphics](https://crates.io/crates/embedded-graphics)
-crate.
+ crate.
 
-This is very beginning of the development, however it is functional to the point where single plot can be drawn.
+ Thanks to basing it on `embedded-graphics` crate the library is very portable out of the box.
+ It is not dependent on any hardware target.
+ To throw it into your project, you only need to have a display that implements `DrawTarget` trait.
+ For more details see [DrawTarget](https://docs.rs/embedded-graphics/latest/embedded_graphics/prelude/trait.DrawTarget.html) docs.
+
+ Bonus feature of `embedded-graphics` is the simulator.
+ You can use it to develop your plots without your target hardware, easily create documentation and so on.
+
+ Library utilizes builder pattern and type states - it allows easy separation of the data and decoration in the target application.
+
+ ## Examples
+ ### Single plot
+ Simple plot example
+ #### On color display:
+ ![single plot on color display](doc-resources/single-plot-color.png "Color plot of single curve")
+ #### On monochromatic display:
+ ![single plot on monochromatic display](doc-resources/single-plot-mono.png "Monochromatic plot of single curve")
+
+ Code to render:
+ ```rust
+ use embedded_plots::curve::{Curve, PlotPoint};
+ use embedded_plots::single_plot::SinglePlot;
+ use embedded_plots::axis::Scale;
+ use embedded_graphics::geometry::{Point, Size};
+ use embedded_graphics::pixelcolor::{RgbColor, Rgb565};
+ use embedded_graphics::drawable::Drawable;
+
+ //simulator dependencies, aka screen driver
+ use embedded_graphics_simulator::SimulatorDisplay;
+
+ let mut display: SimulatorDisplay<Rgb565> = SimulatorDisplay::new(Size::new(480, 272));
+ let data = vec![
+         PlotPoint { x: 0, y: 0 },
+         PlotPoint { x: 1, y: 2 },
+         PlotPoint { x: 2, y: 2 },
+         PlotPoint { x: 3, y: 0 },
+     ];
+ let curve = Curve::from_data(data.as_slice());
+
+ let plot = SinglePlot::new(
+     &curve,
+     Scale::RangeFraction(3),
+     Scale::RangeFraction(2))
+ .into_drawable(
+     Point { x: 50, y: 10 },
+     Point { x: 430, y: 250 })
+ .set_color(RgbColor::YELLOW)
+ .set_text_color(RgbColor::WHITE);
+
+ plot.draw(&mut display).unwrap();
+ ```
+
+ ### Axis
+ You can also use axis on its own, it looks like this:
+ ![free axis examples](doc-resources/free-axis-example.png "Free axis example")
+ Code to render example axis:
+ ```rust
+ use embedded_plots::axis::{Axis, Scale, Placement};
+ use embedded_graphics::pixelcolor::{RgbColor, Rgb565};
+ use embedded_graphics::drawable::Drawable;
+ use embedded_graphics::geometry::Size;
+
+ //simulator dependencies, aka screen driver
+ use embedded_graphics_simulator::SimulatorDisplay;
+ use embedded_graphics::style::TextStyleBuilder;
+ use embedded_graphics::fonts::Font6x8;
+
+ let mut display: SimulatorDisplay<Rgb565> = SimulatorDisplay::new(Size::new(480, 272));
+
+ let text_style_white = TextStyleBuilder::new(Font6x8)
+     .text_color(RgbColor::WHITE)
+     .build();
+ Axis::new(0..100)
+     .set_title("Title")
+     .set_scale(Scale::Fixed(10))
+     .into_drawable_axis(Placement::X { x1: 40, x2: 230, y: 10 })
+     .set_text_style(text_style_white)
+     .set_color(RgbColor::WHITE)
+     .draw(&mut display).unwrap();
+ ```
+ For more details, see `free_axis` example
+
+ ## Current limitations and future plans
+ This is very beginning of the development, however it is functional to the point where single plot can be drawn.
+
+ Main issue for now is that you need to predict on how much space will be occupied by axis ticks,
+ numbers and titles, points passed to `.into_drawable()` are the boundaries for which curve is scaled.
+ This will be fixed, please be prepared for it since it might be a breaking change for you.
+
+ #### Main features planned soon:
+ * Drawing multiple curves that share the same X and Y domains on a single plot (take curves slice instead of single curve)
+ * Dual plot - drawing curves that have two separate domains (either only on one axis or both).
+   Axis on both sides, left and right (or top and bottom) will be drawn with color corresponding to plot
+ * Support for floating point domains
+ * Support for fixed point curve data with intermediate floating point scales (to avoid floating point calculations for each drawn point)
+
+ #### Features I'd love to see in the future:
+ * Partial redrawing - possibility to substitute data and detect which parts of the screen needs to be redrawed
+ * Oscilloscope style live mode (adding new points without any redrawing, no data retention)
+ * Cursors - manual and math based (max,min,avg and so on...)
+
+ ## Contributions
+ Contributions are more than welcome, if you have particular improvement, raise an issue or submit merge request on project's Gitlab page.
+
+ If you just want to help but don't have anything specific in mind, please take a look at [issue tracker](https://gitlab.com/mchodzikiewicz/embedded-plots/-/issues) and pick one.

src/axis.rs

@@ -10,7 +10,7 @@ use embedded_graphics::{
 };
 use crate::range_conv::Scalable;
 
-
+/// Used to provide alignment of an axis, it will be drown exactly on the line marked by the points
 pub enum Placement {
     X {
         x1: i32,
@@ -24,8 +24,13 @@ pub enum Placement {
     },
 }
 
+/// Used to describe how densely ticks should be drawn
 pub enum Scale {
+    /// Fixed scale means that ticks will be drawn between each increment of absolute distance provided.
+    /// for example, on range 0..30 and Fixed(10), ticks will be drawn for 0, 10 and 20
     Fixed(usize),
+    /// RangeFraction means that provided number of ticks ticks will be drawn on entire range
+    /// for example, on range 0..60 and RangeFraction(3), ticks will be drawn for 0, 20 and 40
     RangeFraction(usize),
 }
 
@@ -35,28 +40,37 @@ impl Default for Scale {
     }
 }
 
+/// Display-agnostic axis object, only contains scale range and title, can be converted to drawable axis for specific display
 pub struct Axis<'a> {
+    /// range that the scale will be drawn for
     range: Range<i32>,
+    /// axis title displayed right next to it
     title: Option<&'a str>,
+    /// Definition on how scale ticks should be drawn
     scale: Option<Scale>,
 }
 
+/// builder methods to modify axis decoration
 impl<'a> Axis<'a>
 {
+    /// create new axis data
     pub fn new(range: Range<i32>) -> Axis<'a> {
         Axis { range, title: None, scale: None }
     }
 
+    /// define how scale ticks should be drawn
     pub fn set_scale(mut self, scale: Scale) -> Axis<'a> {
         self.scale = Some(scale);
         self
     }
 
+    /// set axis title
     pub fn set_title(mut self, title: &'a str) -> Axis<'a> {
         self.title = Some(title);
         self
     }
 
+    /// turn axis data into drawable object suitable for specific display
     pub fn into_drawable_axis<C, F>(self, placement: Placement) -> DrawableAxis<'a, C, F>
         where
             C: PixelColor + Default,
@@ -74,6 +88,7 @@ impl<'a> Axis<'a>
     }
 }
 
+/// Drawable axis object, constructed for specific display
 pub struct DrawableAxis<'a, C, F>
     where
         C: PixelColor,
@@ -102,10 +117,14 @@ impl<'a, C, F> DrawableAxis<'a, C, F>
         self.text_style = Some(val);
         self
     }
+
+    /// set how wide tick should be drawn on the axis
     pub fn set_tick_size(mut self, val: usize) -> DrawableAxis<'a, C, F> {
         self.tick_size = Some(val);
         self
     }
+
+    /// set thickness of the main line of the axis
     pub fn set_thickness(mut self, val: usize) -> DrawableAxis<'a, C, F> {
         self.thickness = Some(val);
         self
@@ -119,6 +138,8 @@ impl<'a, C, F> Drawable<C> for DrawableAxis<'a, C, F>
         F: Font + Copy,
         TextStyle<C, F>: Clone + Default,
 {
+
+    /// most important function - draw the axis on the display
     fn draw<D: DrawTarget<C>>(self, display: &mut D) -> Result<(), D::Error> {
         let color = self.color.unwrap_or_default();
         let text_style = self.text_style.unwrap_or_default();

src/curve.rs

@@ -10,23 +10,27 @@ use embedded_graphics::pixelcolor::{PixelColor};
 use embedded_graphics::primitives::{Line, Primitive};
 use embedded_graphics::style::PrimitiveStyle;
 
-
+/// representation of the single point on the curve
 pub struct PlotPoint {
     pub x: i32,
     pub y: i32,
 }
 
+/// curve object that contains data to be plotted
 pub struct Curve<'a> {
+    /// slice of points to be drawn
     points: &'a [PlotPoint],
     pub x_range: Range<i32>,
     pub y_range: Range<i32>,
 }
 
 impl<'a> Curve<'a> {
+    /// create new curve data with manual ranges
     pub fn new(points: &'a [PlotPoint], x_range: Range<i32>, y_range: Range<i32>) -> Curve {
         Curve { points, x_range, y_range }
     }
 
+    /// create new curve data with ranges automatically deducted based on provided points
     pub fn from_data(points: &'a [PlotPoint]) -> Curve {
         let x_range = match points
             .iter()
@@ -46,6 +50,7 @@ impl<'a> Curve<'a> {
         Curve { points, x_range, y_range }
     }
 
+    /// create curve that can be drawed on specific display
     pub fn into_drawable_curve<C>(&self,
                                   top_left: &'a Point,
                                   bottom_right: &'a Point,
@@ -76,6 +81,7 @@ impl<'a> Curve<'a> {
     }
 }
 
+/// Drawable curve object, constructed for specific display
 pub struct DrawableCurve<C, I>
 {
     scaled_data: I,
@@ -83,15 +89,19 @@ pub struct DrawableCurve<C, I>
     thickness: Option<usize>,
 }
 
+/// builder methods to modify curve decoration
 impl<C, I> DrawableCurve<C, I>
     where
         C: PixelColor,
         I: Iterator<Item=Point>,
 {
+    /// set curve color
     pub fn set_color(mut self, color: C) -> DrawableCurve<C, I> {
         self.color = Some(color);
         self
     }
+
+    /// set curve line thickness
     pub fn set_thickness(mut self, thickness: usize) -> DrawableCurve<C,I> {
         self.thickness = Some(thickness);
         self
@@ -102,6 +112,7 @@ impl<C, I> Drawable<C> for DrawableCurve<C, I>
     where C: PixelColor + Default,
           I: Iterator<Item=Point>,
 {
+    /// most important function - draw the curve on the display
     fn draw<D: DrawTarget<C>>(self, display: &mut D) -> Result<(), D::Error> {
         let color = match self.color {
             None => C::default(),

src/lib.rs

@@ -1,7 +1,117 @@
-#![no_std]
+//!# Embedded Plots
+//! Heapless plotting library for small embedded targets, based on [embedded-graphics](https://crates.io/crates/embedded-graphics)
+//! crate.
+//!
+//! Thanks to basing it on `embedded-graphics` crate the library is very portable out of the box.
+//! It is not dependent on any hardware target.
+//! To throw it into your project, you only need to have a display that implements `DrawTarget` trait.
+//! For more details see [DrawTarget](https://docs.rs/embedded-graphics/latest/embedded_graphics/prelude/trait.DrawTarget.html) docs.
+//!
+//! Bonus feature of `embedded-graphics` is the simulator.
+//! You can use it to develop your plots without your target hardware, easily create documentation and so on.
+//!
+//! Library utilizes builder pattern and type states - it allows easy separation of the data and decoration in the target application.
+//!
+//! ## Examples
+//! ### Single plot
+//! Simple plot example
+//! #### On color display:
+//! ![single plot on color display](doc-resources/single-plot-color.png "Color plot of single curve")
+//! #### On monochromatic display:
+//! ![single plot on monochromatic display](doc-resources/single-plot-mono.png "Monochromatic plot of single curve")
+//!
+//! Code to render:
+//! ```rust
+//! use embedded_plots::curve::{Curve, PlotPoint};
+//! use embedded_plots::single_plot::SinglePlot;
+//! use embedded_plots::axis::Scale;
+//! use embedded_graphics::geometry::{Point, Size};
+//! use embedded_graphics::pixelcolor::{RgbColor, Rgb565};
+//! use embedded_graphics::drawable::Drawable;
+//!
+//! //simulator dependencies, aka screen driver
+//! use embedded_graphics_simulator::SimulatorDisplay;
+//!
+//! let mut display: SimulatorDisplay<Rgb565> = SimulatorDisplay::new(Size::new(480, 272));
+//! let data = vec![
+//!         PlotPoint { x: 0, y: 0 },
+//!         PlotPoint { x: 1, y: 2 },
+//!         PlotPoint { x: 2, y: 2 },
+//!         PlotPoint { x: 3, y: 0 },
+//!     ];
+//! let curve = Curve::from_data(data.as_slice());
+//!
+//! let plot = SinglePlot::new(
+//!     &curve,
+//!     Scale::RangeFraction(3),
+//!     Scale::RangeFraction(2))
+//! .into_drawable(
+//!     Point { x: 50, y: 10 },
+//!     Point { x: 430, y: 250 })
+//! .set_color(RgbColor::YELLOW)
+//! .set_text_color(RgbColor::WHITE);
+//!
+//! plot.draw(&mut display).unwrap();
+//! ```
+//!
+//! ### Axis
+//! You can also use axis on its own, it looks like this:
+//! ![free axis examples](doc-resources/free-axis-example.png "Free axis example")
+//! Code to render example axis:
+//! ```rust
+//! use embedded_plots::axis::{Axis, Scale, Placement};
+//! use embedded_graphics::pixelcolor::{RgbColor, Rgb565};
+//! use embedded_graphics::drawable::Drawable;
+//! use embedded_graphics::geometry::Size;
+//!
+//! //simulator dependencies, aka screen driver
+//! use embedded_graphics_simulator::SimulatorDisplay;
+//! use embedded_graphics::style::TextStyleBuilder;
+//! use embedded_graphics::fonts::Font6x8;
+//!
+//! let mut display: SimulatorDisplay<Rgb565> = SimulatorDisplay::new(Size::new(480, 272));
+//!
+//! let text_style_white = TextStyleBuilder::new(Font6x8)
+//!     .text_color(RgbColor::WHITE)
+//!     .build();
+//! Axis::new(0..100)
+//!     .set_title("Title")
+//!     .set_scale(Scale::Fixed(10))
+//!     .into_drawable_axis(Placement::X { x1: 40, x2: 230, y: 10 })
+//!     .set_text_style(text_style_white)
+//!     .set_color(RgbColor::WHITE)
+//!     .draw(&mut display).unwrap();
+//! ```
+//! For more details, see `free_axis` example
+//!
+//! ## Current limitations and future plans
+//! This is very beginning of the development, however it is functional to the point where single plot can be drawn.
+//!
+//! Main issue for now is that you need to predict on how much space will be occupied by axis ticks,
+//! numbers and titles, points passed to `.into_drawable()` are the boundaries for which curve is scaled.
+//! This will be fixed, please be prepared for it since it might be a breaking change for you.
+//!
+//! #### Main features planned soon:
+//! * Drawing multiple curves that share the same X and Y domains on a single plot (take curves slice instead of single curve)
+//! * Dual plot - drawing curves that have two separate domains (either only on one axis or both).
+//!   Axis on both sides, left and right (or top and bottom) will be drawn with color corresponding to plot
+//! * Support for floating point domains
+//! * Support for fixed point curve data with intermediate floating point scales (to avoid floating point calculations for each drawn point)
+//!
+//! #### Features I'd love to see in the future:
+//! * Partial redrawing - possibility to substitute data and detect which parts of the screen needs to be redrawed
+//! * Oscilloscope style live mode (adding new points without any redrawing, no data retention)
+//! * Cursors - manual and math based (max,min,avg and so on...)
+//!
+//! ## Contributions
+//! Contributions are more than welcome, if you have particular improvement, raise an issue or submit merge request on project's Gitlab page.
+//!
+//! If you just want to help but don't have anything specific in mind, please take a look at [issue tracker](https://gitlab.com/mchodzikiewicz/embedded-plots/-/issues) and pick one.
 
+#![no_std]
 pub mod curve;
 pub mod axis;
+/// plot that draws single data series
 pub mod single_plot;
 
 mod range_conv;

src/single_plot.rs

@@ -7,22 +7,31 @@ use crate::axis::{Scale, Placement, Axis};
 use embedded_graphics::style::TextStyleBuilder;
 use embedded_graphics::fonts::Font6x8;
 
+/// Display agnostic single curve plot object
 pub struct SinglePlot<'a> {
+    /// curve to be drawn on the plot
     curve: &'a Curve<'a>,
+    /// range of X axis on which curve will be drawn
     x_scale: Scale,
+    /// range of Y axis on which curve will be drawn
     y_scale: Scale,
 }
 
 impl<'a> SinglePlot<'a> {
+    /// create SinglePlot object with manual range
     pub fn new(curve: &'a Curve<'a>, x_scale: Scale, y_scale: Scale) -> SinglePlot {
         SinglePlot { curve, x_scale, y_scale }
     }
 
+    //TODO: add auto range plot constructor
+
+    /// convert to drawable form for specific display
     pub fn into_drawable<C: PixelColor + Default>(self, top_left: Point, bottom_right: Point) -> DrawableSinglePlot<'a, C> {
         DrawableSinglePlot { plot: self, color: None, text_color: None, axis_color: None, thickness: None, axis_thickness: None, top_left, bottom_right }
     }
 }
 
+/// Drawable single plot object, constructed for specific display
 pub struct DrawableSinglePlot<'a, C>
     where
         C: PixelColor + Default,
@@ -37,6 +46,7 @@ pub struct DrawableSinglePlot<'a, C>
     bottom_right: Point,
 }
 
+/// builder methods to modify plot decoration
 impl<'a, C> DrawableSinglePlot<'a, C>
     where
         C: PixelColor + Default,
@@ -46,32 +56,39 @@ impl<'a, C> DrawableSinglePlot<'a, C>
         self
     }
 
+    /// if not set, main color will be used
     pub fn set_text_color(mut self, color: C) -> DrawableSinglePlot<'a, C> {
         self.text_color = Some(color);
         self
     }
 
+    /// if not set, main color will be used
     pub fn set_axis_color(mut self, color: C) -> DrawableSinglePlot<'a, C> {
         self.axis_color = Some(color);
         self
     }
 
+    /// set curve thickness
     pub fn set_thickness(mut self, thickness: usize) -> DrawableSinglePlot<'a, C> {
         self.thickness = Some(thickness);
         self
     }
 
+    ///set axis thickness
     pub fn set_axis_thickness(mut self, thickness: usize) -> DrawableSinglePlot<'a, C> {
         self.axis_thickness = Some(thickness);
         self
     }
 
+    //TODO: add axis ticks thickness
+
 }
 
 impl<'a, C> Drawable<C> for DrawableSinglePlot<'a, C>
     where
         C: PixelColor + Default,
 {
+    /// most important function - draw the plot on the display
     fn draw<D: DrawTarget<C>>(self, display: &mut D) -> Result<(), D::Error> {
         let color = self.color.unwrap_or_default();
         let text_color = self.text_color.unwrap_or(color);