| 1 | //! garcalc-graph: 2D/3D graphing engine |
| 2 | //! |
| 3 | //! Provides function plotting, parametric curves, implicit curves, |
| 4 | //! and 3D surface visualization. |
| 5 | |
| 6 | pub mod plot2d; |
| 7 | pub mod plot3d; |
| 8 | |
| 9 | pub use plot2d::{CURVE_COLORS, Graph2D, PlotConfig, PlottedFunction, ViewportPreset}; |
| 10 | pub use plot3d::{Camera3D, CameraPreset, Colormap, Graph3D, Plot3DConfig, RenderMode, Surface3D, Viewport3D}; |
| 11 | |
| 12 | use garcalc_cas::Expr; |
| 13 | use serde::{Deserialize, Serialize}; |
| 14 | |
| 15 | /// Color for graph elements |
| 16 | #[derive(Debug, Clone, Copy, Serialize, Deserialize)] |
| 17 | pub struct Color { |
| 18 | pub r: u8, |
| 19 | pub g: u8, |
| 20 | pub b: u8, |
| 21 | pub a: u8, |
| 22 | } |
| 23 | |
| 24 | impl Color { |
| 25 | pub const RED: Self = Self { |
| 26 | r: 255, |
| 27 | g: 0, |
| 28 | b: 0, |
| 29 | a: 255, |
| 30 | }; |
| 31 | pub const BLUE: Self = Self { |
| 32 | r: 0, |
| 33 | g: 0, |
| 34 | b: 255, |
| 35 | a: 255, |
| 36 | }; |
| 37 | pub const GREEN: Self = Self { |
| 38 | r: 0, |
| 39 | g: 128, |
| 40 | b: 0, |
| 41 | a: 255, |
| 42 | }; |
| 43 | pub const BLACK: Self = Self { |
| 44 | r: 0, |
| 45 | g: 0, |
| 46 | b: 0, |
| 47 | a: 255, |
| 48 | }; |
| 49 | } |
| 50 | |
| 51 | /// Line style for curves |
| 52 | #[derive(Debug, Clone, Copy, Serialize, Deserialize)] |
| 53 | pub enum LineStyle { |
| 54 | Solid, |
| 55 | Dashed, |
| 56 | Dotted, |
| 57 | } |
| 58 | |
| 59 | /// A single piece of a piecewise function |
| 60 | #[derive(Debug, Clone, Serialize, Deserialize)] |
| 61 | pub struct PiecewisePiece { |
| 62 | pub expr: Expr, |
| 63 | pub condition: PiecewiseCondition, |
| 64 | } |
| 65 | |
| 66 | /// Condition for a piecewise segment |
| 67 | #[derive(Debug, Clone, Serialize, Deserialize)] |
| 68 | pub enum PiecewiseCondition { |
| 69 | LessThan(f64), |
| 70 | LessEqual(f64), |
| 71 | GreaterThan(f64), |
| 72 | GreaterEqual(f64), |
| 73 | Between(f64, f64), |
| 74 | BetweenInclusive(f64, f64), |
| 75 | Always, |
| 76 | } |
| 77 | |
| 78 | impl PiecewiseCondition { |
| 79 | pub fn matches(&self, x: f64) -> bool { |
| 80 | match self { |
| 81 | Self::LessThan(v) => x < *v, |
| 82 | Self::LessEqual(v) => x <= *v, |
| 83 | Self::GreaterThan(v) => x > *v, |
| 84 | Self::GreaterEqual(v) => x >= *v, |
| 85 | Self::Between(a, b) => x > *a && x < *b, |
| 86 | Self::BetweenInclusive(a, b) => x >= *a && x <= *b, |
| 87 | Self::Always => true, |
| 88 | } |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | /// A plottable function or relation |
| 93 | #[derive(Debug, Clone, Serialize, Deserialize)] |
| 94 | pub enum Plottable { |
| 95 | /// y = f(x) |
| 96 | Explicit2D { |
| 97 | expr: Expr, |
| 98 | x_var: String, |
| 99 | color: Color, |
| 100 | style: LineStyle, |
| 101 | }, |
| 102 | /// F(x, y) = 0 |
| 103 | Implicit2D { |
| 104 | expr: Expr, |
| 105 | x_var: String, |
| 106 | y_var: String, |
| 107 | color: Color, |
| 108 | }, |
| 109 | /// (x(t), y(t)) |
| 110 | Parametric2D { |
| 111 | x_expr: Expr, |
| 112 | y_expr: Expr, |
| 113 | t_var: String, |
| 114 | t_range: (f64, f64), |
| 115 | color: Color, |
| 116 | }, |
| 117 | /// r = f(theta) |
| 118 | Polar2D { |
| 119 | expr: Expr, |
| 120 | theta_var: String, |
| 121 | theta_range: (f64, f64), |
| 122 | color: Color, |
| 123 | style: LineStyle, |
| 124 | }, |
| 125 | /// Piecewise-defined function |
| 126 | Piecewise2D { |
| 127 | pieces: Vec<PiecewisePiece>, |
| 128 | x_var: String, |
| 129 | color: Color, |
| 130 | style: LineStyle, |
| 131 | }, |
| 132 | /// z = f(x, y) |
| 133 | Explicit3D { |
| 134 | expr: Expr, |
| 135 | x_var: String, |
| 136 | y_var: String, |
| 137 | }, |
| 138 | } |
| 139 | |
| 140 | /// Extended color palette (6 base catppuccin + 6 additional) |
| 141 | pub const COLOR_PALETTE: [Color; 12] = [ |
| 142 | // Original 6 from CURVE_COLORS |
| 143 | Color { r: 137, g: 180, b: 250, a: 255 }, // blue |
| 144 | Color { r: 166, g: 227, b: 161, a: 255 }, // green |
| 145 | Color { r: 249, g: 226, b: 175, a: 255 }, // yellow |
| 146 | Color { r: 243, g: 139, b: 168, a: 255 }, // red |
| 147 | Color { r: 203, g: 166, b: 247, a: 255 }, // mauve |
| 148 | Color { r: 148, g: 226, b: 213, a: 255 }, // teal |
| 149 | // Additional 6 |
| 150 | Color { r: 245, g: 224, b: 220, a: 255 }, // rosewater |
| 151 | Color { r: 242, g: 205, b: 205, a: 255 }, // flamingo |
| 152 | Color { r: 245, g: 194, b: 231, a: 255 }, // pink |
| 153 | Color { r: 250, g: 179, b: 135, a: 255 }, // peach |
| 154 | Color { r: 180, g: 190, b: 254, a: 255 }, // lavender |
| 155 | Color { r: 137, g: 220, b: 235, a: 255 }, // sky |
| 156 | ]; |
| 157 | |
| 158 | impl Plottable { |
| 159 | pub fn color(&self) -> Option<Color> { |
| 160 | match self { |
| 161 | Self::Explicit2D { color, .. } |
| 162 | | Self::Implicit2D { color, .. } |
| 163 | | Self::Parametric2D { color, .. } |
| 164 | | Self::Polar2D { color, .. } |
| 165 | | Self::Piecewise2D { color, .. } => Some(*color), |
| 166 | Self::Explicit3D { .. } => None, |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | pub fn set_color(&mut self, new_color: Color) { |
| 171 | match self { |
| 172 | Self::Explicit2D { color, .. } |
| 173 | | Self::Implicit2D { color, .. } |
| 174 | | Self::Parametric2D { color, .. } |
| 175 | | Self::Polar2D { color, .. } |
| 176 | | Self::Piecewise2D { color, .. } => *color = new_color, |
| 177 | Self::Explicit3D { .. } => {} |
| 178 | } |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | /// 2D viewport bounds |
| 183 | #[derive(Debug, Clone, Copy, Serialize, Deserialize)] |
| 184 | pub struct Viewport2D { |
| 185 | pub x_min: f64, |
| 186 | pub x_max: f64, |
| 187 | pub y_min: f64, |
| 188 | pub y_max: f64, |
| 189 | } |
| 190 | |
| 191 | impl Default for Viewport2D { |
| 192 | fn default() -> Self { |
| 193 | Self { |
| 194 | x_min: -10.0, |
| 195 | x_max: 10.0, |
| 196 | y_min: -10.0, |
| 197 | y_max: 10.0, |
| 198 | } |
| 199 | } |
| 200 | } |
| 201 |