feat: apply translation and perspective projection to transform matrix before shader upload

src/main.rs

@@ -315,6 +315,13 @@ fn main() {
                     5 => transform[(1,3)] = v, // f
                     _ => {}
                 }
+                // move scene into viewable negative z range
+                let translation: glm::Mat4 = glm::translation(&glm::vec3(0.0, 0.0, -5.0));
+                transform = translation * transform;
+                // apply perspective projection: (aspect, fovy radians, near, far)
+                let projection: glm::Mat4 =
+                    glm::perspective(window_aspect_ratio, std::f32::consts::PI / 4.0, 1.0, 100.0);
+                transform = projection * transform;
                 gl::UniformMatrix4fv(transform_loc, 1, gl::FALSE, transform.as_ptr());
                 gl::BindVertexArray(my_vao);
                 gl::DrawElements(