remove the bevy based turtle and rename turtle-lib-macroquad to turtle-lib

turtle-lib/examples/nikolaus.rs

@@ -0,0 +1,57 @@
+//! Nikolaus example - draws a house-like figure
+
+use turtle_lib::*;
+
+fn nikolausquadrat(turtle: &mut TurtlePlan, groesse: f32) {
+    turtle.forward(groesse);
+    turtle.left(90.0);
+    turtle.forward(groesse);
+    turtle.left(90.0);
+    turtle.forward(groesse);
+    turtle.left(90.0);
+    turtle.forward(groesse);
+    turtle.left(90.0);
+}
+
+fn nikolausdiag(turtle: &mut TurtlePlan, groesse: f32) {
+    let quadrat = groesse * groesse;
+    let diag = (quadrat + quadrat).sqrt();
+
+    turtle.left(45.0);
+    turtle.forward(diag);
+    turtle.left(45.0);
+    nikolausdach2(turtle, groesse);
+    turtle.left(45.0);
+    turtle.forward(diag);
+    turtle.left(45.0);
+}
+
+fn nikolausdach2(turtle: &mut TurtlePlan, groesse: f32) {
+    let quadrat = groesse * groesse;
+    let diag = (quadrat + quadrat).sqrt();
+    turtle.left(45.0);
+    turtle.forward(diag / 2.0);
+    turtle.left(90.0);
+    turtle.forward(diag / 2.0);
+    turtle.left(45.0);
+}
+
+fn nikolaus(turtle: &mut TurtlePlan, groesse: f32) {
+    nikolausquadrat(turtle, groesse);
+    nikolausdiag(turtle, groesse);
+}
+
+#[turtle_main("Nikolaus")]
+fn draw(turtle: &mut TurtlePlan) {
+    turtle.shape(ShapeType::Turtle);
+
+    // Position the turtle (pen up, move, pen down)
+    turtle.pen_up();
+    turtle.backward(80.0);
+    turtle.left(90.0);
+    turtle.forward(50.0);
+    turtle.right(90.0);
+    turtle.pen_down();
+
+    nikolaus(turtle, 100.0);
+}