pass shape params

src/lib.rs

@@ -96,7 +96,7 @@ impl Core {
 	}
 
 	fn render(&self, output: &wgpu::Texture, args: &RedrawArgs) {
-		let mesh = mesh::generate();
+		let mesh = mesh::generate(&args.shape);
 		let mesh = faceted_mesh(&mesh);
 		let mesh = render::Mesh::new(&self.device, &mesh);
 

src/mesh.rs

@@ -7,21 +7,22 @@ pub struct Mesh {
 	pub faces: Vec<[usize; 3]>,
 }
 
-pub fn generate() -> Mesh {
+pub fn generate(shape: &crate::ShapeArgs) -> Mesh {
 	let mut vertices = Vec::<Vec3>::new();
 	let mut faces = Vec::<[usize; 3]>::new();
 
-	let sides: usize = 24;
-	let layers = 12;
-	let base_layer = 4;
-	let diameter = 36.0;
+	let sides = shape.sides as usize;
+	let layers = (shape.layers_up + shape.layers_down) as usize;
+	let base_layer = shape.layers_down;
+	let diameter = shape.base_diameter;
 	let radius = diameter / 2.;
-	let height = 120.;
+	let height = shape.height;
 	let bottom_angle = (PI / sides as f32) * -(base_layer as f32);
 	let top_angle = (PI / sides as f32) * (layers as f32 - base_layer as f32);
 	let bottom_y = radius * bottom_angle.tan();
 	let top_y = radius * top_angle.tan();
 	let incline = height / (top_y - bottom_y);
+	let elevation = -height / 2. - incline * bottom_y;
 
 	let base = vertices.len();
 	for side in 0..(sides - 2) {
@@ -31,7 +32,7 @@ pub fn generate() -> Mesh {
 		let angle = (PI / sides as f32) * (layer as f32 - base_layer as f32);
 		let x = radius;
 		let y = angle.tan() * x;
-		let z = incline * y;
+		let z = elevation + incline * y;
 		for side in 0..sides {
 			let angle = (2. * PI / sides as f32) * side as f32;
 			let rot = Mat2::from_angle(angle);

ui/src/main_window.cxx

@@ -12,6 +12,9 @@ Hyperboloid::Hyperboloid(QWidget* parent)
 Hyperboloid::~Hyperboloid() = default;
 
 void Hyperboloid::updateView() {
+	const int max_layers = (m_ui->sides->value() - 1) / 2;
+	m_ui->layersUp->setMaximum(max_layers);
+	m_ui->layersDown->setMaximum(max_layers);
 	const auto color = m_ui->inBackground->color();
 	const ShapeArgs shape {
 		.sides = (std::uint32_t)m_ui->sides->value(),

ui/src/main_window.ui

@@ -174,6 +174,9 @@
           <property name="maximum">
            <number>11</number>
           </property>
+          <property name="value">
+           <number>8</number>
+          </property>
          </widget>
         </item>
         <item>
@@ -188,6 +191,9 @@
           <property name="maximum">
            <number>11</number>
           </property>
+          <property name="value">
+           <number>4</number>
+          </property>
          </widget>
         </item>
        </layout>