Franz Dietrich
25753b47ce
```rust
// Movement
plan.forward(100);
plan.backward(50);
// Rotation
plan.left(90); // degrees
plan.right(45);
// Circular arcs
plan.circle_left(50.0, 180.0, 36); // radius, angle (degrees), segments
plan.circle_right(50.0, 180.0, 36); // draws arc to the right
// Pen control
plan.pen_up();
plan.pen_down();
// Appearance
plan.set_color(RED);
plan.set_pen_width(5.0);
plan.hide();
plan.show();
// Turtle shape
plan.shape(ShapeType::Triangle);
plan.shape(ShapeType::Turtle); // Default classic turtle shape
plan.shape(ShapeType::Circle);
plan.shape(ShapeType::Square);
plan.shape(ShapeType::Arrow);
// Custom shape
let custom = TurtleShape::new(
vec![vec2(10.0, 0.0), vec2(-5.0, 5.0), vec2(-5.0, -5.0)],
true // filled
);
plan.set_shape(custom);
// Chaining
plan.forward(100).right(90).forward(50);
```
50 lines
1.1 KiB
Rust
50 lines
1.1 KiB
Rust
//! Koch snowflake fractal example
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use macroquad::prelude::*;
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use turtle_lib_macroquad::*;
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fn koch(depth: u32, plan: &mut TurtlePlan, distance: f32) {
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if depth == 0 {
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plan.forward(distance);
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} else {
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let new_distance = distance / 3.0;
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koch(depth - 1, plan, new_distance);
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plan.left(60.0);
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koch(depth - 1, plan, new_distance);
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plan.right(120.0);
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koch(depth - 1, plan, new_distance);
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plan.left(60.0);
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koch(depth - 1, plan, new_distance);
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}
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}
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#[macroquad::main("Koch Snowflake")]
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async fn main() {
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let mut plan = create_turtle();
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// Position turtle
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plan.set_speed(10);
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plan.pen_up();
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plan.backward(150.0);
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plan.pen_down();
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// Draw Koch snowflake (triangle of Koch curves)
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for _ in 0..3 {
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koch(4, &mut plan, 300.0);
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plan.right(120.0);
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}
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plan.hide(); // Hide turtle when done
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// Create app with animation
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let mut app = TurtleApp::new().with_commands(plan.build(), 1000.0);
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loop {
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clear_background(WHITE);
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app.update();
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app.render();
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next_frame().await
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}
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}
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