98 lines
3.0 KiB
Rust
98 lines
3.0 KiB
Rust
//! Cheese example - demonstrates multi-contour fills with holes
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//!
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//! This example creates a cheese-like shape by:
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//! 1. Drawing the outer square boundary
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//! 2. Lifting the pen (pen_up) to close that contour
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//! 3. Drawing circular and triangular holes with pen_up/pen_down
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//!
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//! Lyon's EvenOdd fill rule automatically creates holes where contours overlap!
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use macroquad::prelude::*;
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use turtle_lib::*;
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#[macroquad::main("Cheese with Holes")]
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async fn main() {
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let mut turtle = create_turtle();
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// Set fill color to yellow (cheese color!)
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turtle.set_fill_color(YELLOW);
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turtle.set_pen_color(ORANGE);
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turtle.set_pen_width(3.0);
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println!("=== Starting cheese fill ===");
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turtle.begin_fill();
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// Draw outer boundary (large square)
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println!("Drawing outer square boundary...");
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for _ in 0..4 {
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turtle.forward(400.0);
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turtle.right(90.0);
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}
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// Close outer contour and start drawing holes
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println!("Closing outer contour with pen_up");
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turtle.pen_up();
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// Draw triangular hole in the middle
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println!("Drawing triangular hole...");
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turtle.go_to(vec2(200.0, 120.0));
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turtle.pen_down(); // Start new contour for hole
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for _ in 0..3 {
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turtle.forward(160.0);
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turtle.right(120.0);
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}
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println!("Closing triangle contour with pen_up");
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turtle.pen_up(); // Close triangle hole contour
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// Draw circular hole (top-left) using circle_left
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println!("Drawing circular hole (top-left) with circle_left...");
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turtle.go_to(vec2(100.0, 100.0));
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turtle.pen_down(); // Start new contour for hole
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turtle.circle_left(30.0, 360.0, 36); // radius=30, full circle, 36 steps
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println!("Closing circle contour with pen_up");
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turtle.pen_up(); // Close circle hole contour
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// Draw circular hole (bottom-right) using circle_right
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println!("Drawing circular hole (bottom-right) with circle_right...");
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turtle.go_to(vec2(280.0, 280.0));
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turtle.pen_down(); // Start new contour for hole
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turtle.circle_right(40.0, 360.0, 36); // radius=40, full circle, 36 steps
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println!("Closing circle contour with pen_up");
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turtle.pen_up(); // Close circle hole contour
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// End fill - Lyon will automatically create holes!
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println!("Calling end_fill - Lyon should create holes now!");
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turtle.end_fill();
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// Set animation speed
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turtle.set_speed(300);
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println!("Building and executing turtle plan...");
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// Execute the plan
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let mut app = TurtleApp::new().with_commands(0, turtle.build());
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loop {
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clear_background(Color::new(0.95, 0.95, 0.98, 1.0));
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app.update();
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app.render();
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// Instructions
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draw_text(
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"Cheese with Holes - pen_up/pen_down creates multiple contours!",
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10.0,
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20.0,
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18.0,
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BLACK,
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);
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draw_text("Press ESC or Q to quit", 10.0, 40.0, 16.0, DARKGRAY);
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if is_key_pressed(KeyCode::Escape) || is_key_pressed(KeyCode::Q) {
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break;
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}
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next_frame().await;
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}
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}
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