Press enter to log the camera position

src/programs/viewer.rs

@@ -14,9 +14,12 @@ use glium::Display;
 use glium::glutin;
 use glium::glutin::{EventsLoop, WindowBuilder};
 
-use glium::glutin::Event;
-use glium::glutin::WindowEvent;
-use glium::glutin::VirtualKeyCode;
+use glium::glutin::{
+    Event,
+    WindowEvent,
+    VirtualKeyCode,
+    ElementState,
+};
 
 use model_converter::scene::Scene;
 use model_converter::math::bounding_box::BoundingBox3;
@@ -78,6 +81,10 @@ fn main() {
         }
     }
 
+    let center = (bbox.min() + bbox.max()) / 2.0;
+    let center = Vector3::new(center.x() as f32, center.y() as f32, center.z() as f32);
+    let size = (bbox.max() - bbox.min()).norm() as f32;
+
     let mut events_loop = EventsLoop::new();
     let window = WindowBuilder::new().with_visibility(false);
     let context = glutin::ContextBuilder::new().with_depth_buffer(24);
@@ -151,11 +158,41 @@ fn main() {
                 Event::WindowEvent {
                     event: WindowEvent::KeyboardInput {
                         input: glutin::KeyboardInput {
-                            virtual_keycode: Some(VirtualKeyCode::Escape), ..
+                            virtual_keycode: Some(VirtualKeyCode::Escape),
+                            state: ElementState::Pressed, ..
                         }, ..
                     }, ..
                 } => closed = true,
 
+                // Enter key
+                Event::WindowEvent {
+                    event: WindowEvent::KeyboardInput {
+                        input: glutin::KeyboardInput {
+                            virtual_keycode: Some(VirtualKeyCode::Return),
+                            state: ElementState::Pressed, ..
+                        }, ..
+                    }, ..
+                } => {
+
+                    // Go back in world coordinates
+                    let position = camera.position * size as f32;
+                    let position = position + center;
+
+                    let target = camera.target * size as f32;
+                    let target = target + center;
+
+                    let up = camera.up;
+
+                    println!("Camera:");
+
+                    println!("\tPosition: ({}, {}, {})",
+                        position.x(), position.y(), position.z());
+                    println!("\tTarget:   ({}, {}, {})",
+                        target.x(), target.y(), target.z());
+                    println!("\tUp:       ({}, {}, {})",
+                        up.x(), up.y(), up.z());
+                }
+
                 _ => (),
             }
         });