update the README.md

README.md

@@ -17,9 +17,32 @@ A modern turtle graphics library for Rust built on [Macroquad](https://macroquad
 - 🐢 **Multiple Turtle Shapes**: Triangle, classic turtle, circle, square, arrow, and custom shapes
 - 🔍 **Structured Logging**: Optional `tracing` integration for debugging (zero overhead when disabled)
 - 💨 **Lightweight**: Fast compilation and runtime
+- 📤 **SVG Export**: Export drawings to SVG format with viewBox and padding (feature-gated)
 
 ## Quick Start
 
+The simplest example to draw a square:
+
+```rust
+//! Minimal turtle example - just 10 lines!
+//!
+//! This is the simplest possible turtle program using the macro.
+
+use turtle_lib::*;
+
+#[turtle_main]
+fn hello() {
+    turtle.set_pen_color(BLUE);
+    for _ in 0..4 {
+        turtle.forward(100.0);
+        turtle.right(90.0);
+    }
+}
+```
+The turtle starts at the center of the window, facing right (0 degrees). The above code draws a blue square.
+
+The `turtle_main` macro sets up the Macroquad window, turtle initialization, and main loop for you. It expands to code similar to this:
+
 ```rust
 use macroquad::prelude::*;
 use turtle_lib::*;
@@ -108,7 +131,7 @@ plan.forward(100).right(90).forward(50);
 
 ### Execution Modes
 
-Speed is now controlled via commands, allowing dynamic switching during execution:
+Speed controlled via commands, allowing dynamic switching during execution:
 
 ```rust
 let mut plan = create_turtle();
@@ -124,32 +147,15 @@ plan.pen_down();
 plan.forward(200);
 plan.right(90);
 
-// Create app (no speed parameter needed)
+// Create app
 let app = TurtleApp::new().with_commands(plan.build());
 ```
 
 **Speed Modes:**
 - **Speed < 999**: Animated mode with smooth tweening
-- **Speed >= 999**: Instant mode (no animation)
+- **Speed >= 999**: Instant mode (no animation) the bigger the number the more segments will be added per frame.
 - Default speed is 100.0 if not specified
 
-### Animation Loop
-
-```rust
-loop {
-    clear_background(WHITE);
-    
-    app.update();  // Update animation state
-    app.render();  // Draw to screen
-    
-    if app.is_complete() {
-        // All commands executed
-    }
-    
-    next_frame().await
-}
-```
-
 ## Debugging and Logging
 
 The library uses [`tracing`](https://docs.rs/tracing) for structured diagnostic logging. This is completely optional - if you don't set up a subscriber, there's zero overhead.
@@ -177,6 +183,48 @@ RUST_LOG=turtle_lib=trace cargo run
 
 **See the complete example**: [`examples/logging_example.rs`](turtle-lib/examples/logging_example.rs) demonstrates initialization, log levels, filtering, and example output.
 
+## SVG Export
+
+Export your turtle drawings to SVG format for use in web applications, vector graphics editors, or further processing.
+
+### Enabling SVG Export
+
+Add the `svg` feature to enable SVG export functionality:
+
+```bash
+cargo run --example export_svg --features svg
+```
+
+### Usage
+
+```rust
+use turtle_lib::*;
+
+// Create your drawing
+let mut plan = create_turtle();
+plan.forward(100).right(90).forward(100);
+
+// Create app
+let mut app = TurtleApp::new().with_commands(plan.build());
+
+// Export to SVG
+app.export_drawing("drawing.svg", export::DrawingFormat::Svg)?;
+```
+
+### Features
+
+- **Complete Primitive Support**: Lines, circles, arcs, polygons, and fills
+- **Automatic viewBox**: Includes 20px padding around the entire drawing
+- **Color and Styling**: Preserves colors, pen width, and fill colors
+- **Multi-Contour Fills**: Exports complex fills with holes using SVG paths
+- **Text Support**: Exports text elements with positioning
+
+### Example
+
+See [`examples/export_svg.rs`](turtle-lib/examples/export_svg.rs) for a complete example that draws various shapes and exports them to SVG.
+
+The exported SVG can be opened in any web browser or vector graphics application.
+
 ## Examples
 
 Run examples with:
@@ -188,6 +236,9 @@ cargo run --example yinyang
 cargo run --example stern
 cargo run --example nikolaus
 
+# SVG export example (requires --features svg)
+cargo run --example export_svg --features svg
+
 # Logging example - shows how to enable debug output
 cargo run --example logging_example
 RUST_LOG=turtle_lib=debug cargo run --example logging_example
@@ -210,15 +261,18 @@ RUST_LOG=turtle_lib=debug cargo run --example logging_example
 - **fill_circle_test.rs**: Circle fills with different angles
 - **fill_instant_test.rs**: Quick fill test in instant mode
 
+#### Export
+- **export_svg.rs**: Demonstrates SVG export functionality (requires `--features svg`)
+
 #### Debugging
 - **logging_example.rs**: Demonstrates how to enable and use tracing/logging output
 
 ## Why Lyon?
 
 - Automatic hole detection via EvenOdd fill rule
+- Handles any self-intersecting path
 - GPU-accelerated rendering
 - Standards-compliant (matches SVG, HTML Canvas)
-- Handles any self-intersecting path
 
 ### Basic Fill
 ```rust
@@ -283,15 +337,6 @@ turtle-lib/src/
 └── general/        - Type definitions (Angle, Length, etc.)
 ```
 
-### Design Principles
-
-- **State Management**: Clean separation between turtle state and world state
-- **Command Queue**: Commands queued and executed with optional tweening
-- **Consolidated Commands**: Unified commands reduce duplication (Move, Turn, Circle)
-- **Dynamic Speed Control**: Speed managed via SetSpeed commands for flexibility
-- **Tweening System**: Smooth interpolation with easing functions
-- **Unified Lyon Rendering**: All drawing operations use GPU-accelerated Lyon tessellation
-
 ## Workspace Structure
 
 ```
@@ -309,8 +354,14 @@ cargo check
 # Run specific example
 cargo run --example yinyang
 
+# Run SVG export example (requires svg feature)
+cargo run --example export_svg --features svg
+
 # Build release version
 cargo build --release
+
+# Build with SVG support
+cargo build --features svg
 ```
 
 ## Development Status
@@ -330,6 +381,7 @@ cargo build --release
 - **Live fill preview** during animation with progressive rendering
 - **Multi-contour support** - pen_up/pen_down manage contours
 - **Command consolidation**
+- **SVG Export** - Export drawings to SVG with viewBox and padding (feature-gated) 
 
 ## What's New
 

turtle-lib/README.md

@@ -3,111 +3,3 @@
 The main turtle graphics library built on Macroquad with Lyon tessellation.
 
 **See the [main README](../README.md) for complete documentation.**
-
-## Features
-
-✅ **Complete Lyon Integration** - All drawing operations use GPU-optimized tessellation
-- Unified rendering pipeline for lines, arcs, circles, and fills
-- ~410 lines of code eliminated through architectural simplification
-- Consistent high-quality rendering across all primitives
-
-✅ **Multi-Contour Fill System** - Advanced fill capabilities with automatic hole detection
-- EvenOdd fill rule for complex shapes with holes (like cheese or yin-yang symbols)
-- `pen_up()` closes current contour, `pen_down()` opens next contour
-- Progressive fill preview during animations
-- Support for self-intersecting paths
-
-✅ **Smooth Animation** - Tweening system with live rendering
-- Configurable speed control
-- Frame-rate independent animation
-- Live fill preview during circle/arc drawing
-
-## Quick Start
-
-### Using the `turtle_main` Macro (Recommended for Beginners)
-
-The easiest way to create turtle programs is with the `turtle_main` macro:
-
-```rust
-use macroquad::prelude::*;
-use turtle_lib::*;
-
-#[turtle_main("My First Drawing")]
-fn my_drawing(turtle: &mut TurtlePlan) {
-    turtle.set_pen_color(RED);
-    turtle.forward(100.0);
-    turtle.right(90.0);
-    turtle.forward(100.0);
-}
-```
-
-The macro automatically handles:
-- Window creation and setup
-- Turtle initialization
-- Rendering loop
-- Quit handling (ESC or Q keys)
-
-### Manual Setup (For Advanced Use)
-
-For more control over the application loop:
-
-```rust
-use macroquad::prelude::*;
-use turtle_lib::*;
-
-#[macroquad::main("Turtle")]
-async fn main() {
-    let mut turtle = create_turtle();
-    turtle.forward(100.0).right(90.0);
-    
-    let mut app = TurtleApp::new().with_commands(turtle.build());
-    
-    loop {
-        clear_background(WHITE);
-        app.update();
-        app.render();
-        next_frame().await;
-    }
-}
-```
-
-## Quick Examples
-
-All examples now use the `turtle_main` macro for simplicity:
-
-```bash
-# Run from this directory
-cargo run --example hello_turtle      # Minimal 10-line example
-cargo run --example macro_demo        # Simple square with macro
-cargo run --example square            # Basic square drawing
-cargo run --example shapes            # Different turtle shapes
-cargo run --example yinyang           # Multi-contour fills with holes
-cargo run --example koch              # Recursive fractals
-cargo run --example fill_demo         # Fill with holes (donut)
-cargo run --example cheese_macro      # Cheese example using macro
-cargo run --example fill_advanced     # Complex shapes (manual setup)
-```
-
-Most examples use `turtle_main` for simplicity. A few keep manual setup for custom UI or logging.
-
-## Architecture Highlights
-
-### Rendering Pipeline
-All drawing operations → Lyon tessellation → GPU mesh rendering
-
-### DrawCommand Enum
-Simplified from 5 variants to 1:
-- `Mesh(MeshData)` - unified variant for all drawing operations
-
-### Fill System
-- `FillState` tracks multiple contours (completed + current)
-- Pen state management automatically handles contour creation
-- EvenOdd tessellation provides automatic hole detection
-
-See [LYON_COMPLETE.md](LYON_COMPLETE.md) and [MULTI_CONTOUR_FILLS.md](MULTI_CONTOUR_FILLS.md) for implementation details.
-
-## Status
-
-✅ **Stable** - Lyon integration complete, multi-contour fills working, all examples passing.
-
-See [../README.md](../README.md) for full API documentation and project status.

turtle-lib/src/drawing.rs

@@ -28,7 +28,7 @@ pub fn render_world(world: &TurtleWorld) {
     for turtle in &world.turtles {
         for cmd in &turtle.commands {
             match cmd {
-                DrawCommand::Mesh { data, source } => {
+                DrawCommand::Mesh { data, source: _ } => {
                     // Rendering wie bisher
                     draw_mesh(&data.to_mesh());
                     // Hier könnte man das source für Debug/Export loggen
@@ -39,7 +39,7 @@ pub fn render_world(world: &TurtleWorld) {
                     heading,
                     font_size,
                     color,
-                    source,
+                    source: _,
                 } => {
                     draw_text_command(text, *position, *heading, *font_size, *color);
                     // Hier könnte man das source für Debug/Export loggen
@@ -80,7 +80,7 @@ pub fn render_world_with_tweens(world: &TurtleWorld, zoom_level: f32) {
     for turtle in &world.turtles {
         for cmd in &turtle.commands {
             match cmd {
-                DrawCommand::Mesh { data, source } => {
+                DrawCommand::Mesh { data, source: _ } => {
                     draw_mesh(&data.to_mesh());
                 }
                 DrawCommand::Text {
@@ -89,7 +89,7 @@ pub fn render_world_with_tweens(world: &TurtleWorld, zoom_level: f32) {
                     heading,
                     font_size,
                     color,
-                    source,
+                    source: _,
                 } => {
                     draw_text_command(text, *position, *heading, *font_size, *color);
                 }

turtle-lib/src/export_svg.rs

@@ -5,7 +5,6 @@ pub mod svg_export {
     use crate::commands::TurtleCommand;
     use crate::export::{DrawingExporter, ExportError};
     use crate::state::{DrawCommand, TurtleWorld};
-    use macroquad::prelude::Vec2;
     use std::fs::File;
     use svg::{
         node::element::{Circle, Line, Polygon, Text as SvgText},