added more code to render my first scene; STILL WITH ERRORS

opengl_beginnings/src/custom/sphere_generator.rs

@@ -1,4 +1,5 @@
 use crate::engine::mesh::Mesh;
+use glow::Context;
 use nalgebra::Vector3;
 
 pub struct OctaSphere {
@@ -20,7 +21,14 @@ impl OctaSphere {
         }
     }
 
-    pub fn generate_sphere(&mut self) {
+    pub fn render(&mut self, gl: &Context) {
+        match self.mesh.as_mut() {
+            None => {self.generate_sphere(); self.render(gl)},
+            Some(mut mesh) => {mesh.render(gl)}
+        }
+    }
+
+    fn generate_sphere(&mut self) {
         let (vertices, indices) = self.generator.generate_sphere();
         self.mesh = Some(Mesh::new(vertices, indices))
     }
@@ -51,9 +59,10 @@ impl OctaSphereGenerator {
         let num_vertices = num_vertices_per_face * 8 - (num_divisions + 2) * 12 + 6;
         let num_tris_per_face = (num_divisions + 1) * (num_divisions + 1);
 
+
         let mut vertices = Vec::<Vector3<f32>>::with_capacity(num_vertices as usize);
         let mut indicies = Vec::<u32>::with_capacity((num_tris_per_face * 8 * 3) as usize);
-        vertices.copy_from_slice(&base_vertices);
+        vertices.extend_from_slice(&base_vertices);
 
         // Create 12 edges, with n vertices added along them (n = numDivisions)
         let mut edges = Vec::<Edge>::with_capacity(12);