Use f64 on the geometry side

experiments/2024-10-30/src/geometry.rs

@@ -24,7 +24,7 @@ impl Mesh {
 
 #[derive(Clone, Copy)]
 pub struct Vertex {
-    pub point: [f32; 3],
+    pub point: [f64; 3],
 }
 
 pub type Index = u32;

experiments/2024-10-30/src/render.rs

@@ -192,8 +192,13 @@ impl Renderer {
         let mut vertices = Vec::new();
 
         for triangle in mesh.triangles() {
-            let triangle = triangle
-                .map(|index| Vec3::from(mesh.vertices()[index as usize].point));
+            let triangle = triangle.map(|index| {
+                Vec3::from(
+                    mesh.vertices()[index as usize]
+                        .point
+                        .map(|coord| coord as f32),
+                )
+            });
             let normal = {
                 let [a, b, c] = triangle;