refactor projections into their own module

src/viewer.rs

@@ -1,4 +1,6 @@
 use bevy::{prelude::*, window::PresentMode, render::camera::CameraProjectionPlugin};
+
+use crate::screeninfo::ScreenInfo;
 // use offaxis::{offaxis_camera_setup, OffAxisProjection};
 
 
@@ -36,10 +38,17 @@ pub fn simulate_viewer(mut query: Query<&mut Viewer>)
         //v.position += Vec3::Y * 0.005;
         v.alpha += 0.01;
         let radius = 1.5;
-        v.position = Vec3::new(v.alpha.sin()*radius,v.alpha.cos()*radius + 1.0_f32,15.0);
+
+        let z_distance = 8.0_f32;
+
+        v.position = Vec3::new(v.alpha.sin()*radius,v.alpha.cos()*radius + 1.0_f32,z_distance);
 
         let vm = Mat4::look_at_rh(v.position, Vec3::ZERO, Vec3::Y);
 
+
+
+
+
         println!("{:?}",vm);
 
         // view matrices should be orientation only