render 5 triangles

src/main.rs

@@ -59,20 +59,7 @@ fn offset<T>(n: u32) -> *const c_void {
 // Get a null pointer (equivalent to an offset of 0)
 // ptr::null()
 
-// == // Generate your VAO here
 unsafe fn create_vao(vertices: &Vec<f32>, indices: &Vec<u32>) -> u32 {
-    // Implement me!
-
-    // Also, feel free to delete comments :)
-
-    // This should:
-    // * Generate a VAO and bind it
-    // * Generate a VBO and bind it
-    // * Fill it with data
-    // * Configure a VAP for the data and enable it
-    // * Generate a IBO and bind it
-    // * Fill it with data
-    // * Return the ID of the VAO
     let mut vao_id = 0;
     gl::GenVertexArrays(1, &mut vao_id);
     gl::BindVertexArray(vao_id);
@@ -181,15 +168,15 @@ fn main() {
 
         // == // Set up your VAO around here
 
-        let vertices = vec![
-        -0.6, -0.6, 0.,
-        0.6, -0.6, 0., 
-        0., 0.6, 0.
-        ];
-        let indices = vec![0, 1, 2];
-        let my_vao = unsafe {
-            create_vao(&vertices, &indices)
-        };
+        let vertices: Vec<f32> = (-3..2)
+            .flat_map(|i| {
+                let a = 0.2 * i as f32;
+                vec![-0.1 + a, -0.1, 0., 0.1 + a, -0.1, 0., 0. + a, 0.1, 0.]
+            })
+            .collect();
+
+        let indices: Vec<u32> = (0..vertices.len() as u32).collect();
+        let my_vao = unsafe { create_vao(&vertices, &indices) };
 
         println!("created vao!");
         // let my_vao = unsafe { 1337 };