feat: add rotate around center with input

1 files changed, 39 insertions, 2 deletions

diff --git a/src/main.rs b/src/main.rs
index e4afeac..ad59b38 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -4,7 +4,7 @@ use engine::color::Color;
 use engine::object::{Id as ObjectId, Object};
 use engine::vector::Vec3;
 use engine::vertex::Builder as VertexBuilder;
-use engine::{Engine, WindowSize};
+use engine::{Engine, Key, WindowSize};
 use tracing::Level;
 use tracing_subscriber::FmtSubscriber;
 
@@ -128,8 +128,45 @@ fn main() -> Result<(), Box<dyn Error>>
 
     engine.add_object(square);
 
+    let cam_speed = 3.0;
+
     engine.start(|engine| {
-        let obj = engine.get_object_by_id_mut(ObjectId::new(1));
+        let delta_time = *engine.delta_time();
+
+        if engine.is_key_pressed(Key::W).unwrap() {
+            let cam_target_direction = engine.camera().target_direction().clone();
+
+            *engine.camera_mut().position_mut() +=
+                cam_target_direction * cam_speed * delta_time.as_secs_f32();
+        }
+        if engine.is_key_pressed(Key::S).unwrap() {
+            let rev_cam_target_direction = -engine.camera().target_direction().clone();
+
+            *engine.camera_mut().position_mut() +=
+                rev_cam_target_direction * cam_speed * delta_time.as_secs_f32();
+        }
+        if engine.is_key_pressed(Key::A).unwrap() {
+            let cam_left = engine.camera().left().clone();
+
+            // Camera speed adjusted to be same no matter how far the distance is to the
+            // camera target
+            let cam_speed_dist_adj = cam_speed
+                * (engine.camera().position() - engine.camera().target()).length();
+
+            *engine.camera_mut().position_mut() +=
+                cam_left * cam_speed_dist_adj * delta_time.as_secs_f32();
+        }
+        if engine.is_key_pressed(Key::D).unwrap() {
+            let cam_right = engine.camera().right().clone();
+
+            // Camera speed adjusted to be same no matter how far the distance is to the
+            // camera target
+            let cam_speed_dist_adj = cam_speed
+                * (engine.camera().position() - engine.camera().target()).length();
+
+            *engine.camera_mut().position_mut() +=
+                cam_right * cam_speed_dist_adj * delta_time.as_secs_f32();
+        }
     })?;
 
     Ok(())