From eedf0a1f8f297f438c1282c1dc689d3dfae037e4 Mon Sep 17 00:00:00 2001
From: Sakarias Johansson <sakarias.johansson@goodbyekansas.com>
Date: Sun, 16 Apr 2023 18:50:30 +0200
Subject: =?UTF-8?q?=F0=9F=93=B8=20Add=20more=20keyboard=20input=20for=20ca?=
 =?UTF-8?q?mera?=
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- Numpad +/- changes vfov
- Numpad 8/2 to change aperture
- Numpad 4/6 to change focus disance
---
 racer-tracer/src/camera.rs                       | 48 ++++++++++++++-------
 racer-tracer/src/scene_controller/interactive.rs | 54 ++++++++++++++++++++++++
 2 files changed, 87 insertions(+), 15 deletions(-)

diff --git a/racer-tracer/src/camera.rs b/racer-tracer/src/camera.rs
index 438c18d..18b1d1a 100644
--- a/racer-tracer/src/camera.rs
+++ b/racer-tracer/src/camera.rs
@@ -6,19 +6,21 @@ use crate::vec3::Vec3;
 
 #[derive(Clone)]
 pub struct Camera {
-    pub viewport_height: f64,
-    pub viewport_width: f64,
-    pub origin: Vec3,
-    pub horizontal: Vec3,
-    pub vertical: Vec3,
-    pub upper_left_corner: Vec3,
-    pub forward: Vec3,
-    pub right: Vec3,
-    pub up: Vec3,
-    pub scene_up: Vec3,
-    pub lens_radius: f64,
-    pub focus_distance: f64,
-    pub aspect_ratio: f64,
+    viewport_height: f64,
+    viewport_width: f64,
+    origin: Vec3,
+    horizontal: Vec3,
+    vertical: Vec3,
+    upper_left_corner: Vec3,
+    forward: Vec3,
+    right: Vec3,
+    up: Vec3,
+    scene_up: Vec3,
+    lens_radius: f64,
+    focus_distance: f64,
+    aspect_ratio: f64,
+    vfov: f64,
+    aperture: f64,
 }
 
 impl Camera {
@@ -57,6 +59,8 @@ impl Camera {
             lens_radius: aperture * 0.5,
             focus_distance,
             aspect_ratio: image.aspect_ratio,
+            vfov,
+            aperture,
         }
     }
 
@@ -71,14 +75,24 @@ impl Camera {
     }
 
     pub fn set_fov(&mut self, vfov: f64) {
-        let h = (degrees_to_radians(vfov) / 2.0).tan();
+        self.vfov = vfov;
+        let h = (degrees_to_radians(self.vfov) / 2.0).tan();
         self.viewport_height = 2.0 * h;
         self.viewport_width = self.aspect_ratio * self.viewport_height;
         self.update_viewport();
     }
 
+    pub fn get_vfov(&self) -> f64 {
+        self.vfov
+    }
+
     pub fn set_aperture(&mut self, aperture: f64) {
-        self.lens_radius = aperture * 0.5;
+        self.aperture = aperture;
+        self.lens_radius = self.aperture * 0.5;
+    }
+
+    pub fn get_aperture(&self) -> f64 {
+        self.aperture
     }
 
     pub fn set_focus_distance(&mut self, focus_distance: f64) {
@@ -86,6 +100,10 @@ impl Camera {
         self.update_viewport();
     }
 
+    pub fn get_focus_distance(&self) -> f64 {
+        self.focus_distance
+    }
+
     pub fn get_ray(&self, u: f64, v: f64) -> Ray {
         let ray_direction = self.lens_radius * random_in_unit_disk();
         let offset = self.right * ray_direction.x() + self.up * ray_direction.y();
diff --git a/racer-tracer/src/scene_controller/interactive.rs b/racer-tracer/src/scene_controller/interactive.rs
index 5fdecfc..bf0d50d 100644
--- a/racer-tracer/src/scene_controller/interactive.rs
+++ b/racer-tracer/src/scene_controller/interactive.rs
@@ -138,6 +138,60 @@ impl<'renderer, 'action> SceneController for InteractiveScene<'renderer, 'action
                         cam.go_right(dt * self.camera_speed);
                     })
             }),
+            KeyInputs::input(KeyEvent::Release, Key::NumPadMinus, |_| {
+                self.camera
+                    .write()
+                    .map_err(|e| TracerError::KeyError(e.to_string()))
+                    .map(|mut cam| {
+                        let vfov = cam.get_vfov();
+                        cam.set_fov(vfov + 1.0);
+                    })
+            }),
+            KeyInputs::input(KeyEvent::Release, Key::NumPadPlus, |_| {
+                self.camera
+                    .write()
+                    .map_err(|e| TracerError::KeyError(e.to_string()))
+                    .map(|mut cam| {
+                        let vfov = cam.get_vfov();
+                        cam.set_fov(vfov - 1.0);
+                    })
+            }),
+            KeyInputs::input(KeyEvent::Release, Key::NumPad8, |_| {
+                self.camera
+                    .write()
+                    .map_err(|e| TracerError::KeyError(e.to_string()))
+                    .map(|mut cam| {
+                        let aperture = cam.get_aperture();
+                        cam.set_aperture(aperture + 0.01);
+                    })
+            }),
+            KeyInputs::input(KeyEvent::Release, Key::NumPad2, |_| {
+                self.camera
+                    .write()
+                    .map_err(|e| TracerError::KeyError(e.to_string()))
+                    .map(|mut cam| {
+                        let aperture = cam.get_aperture();
+                        cam.set_aperture(aperture - 0.01);
+                    })
+            }),
+            KeyInputs::input(KeyEvent::Release, Key::NumPad4, |_| {
+                self.camera
+                    .write()
+                    .map_err(|e| TracerError::KeyError(e.to_string()))
+                    .map(|mut cam| {
+                        let focus_distance = cam.get_focus_distance();
+                        cam.set_focus_distance(focus_distance + 1.0);
+                    })
+            }),
+            KeyInputs::input(KeyEvent::Release, Key::NumPad6, |_| {
+                self.camera
+                    .write()
+                    .map_err(|e| TracerError::KeyError(e.to_string()))
+                    .map(|mut cam| {
+                        let focus_distance = cam.get_focus_distance();
+                        cam.set_focus_distance(focus_distance - 1.0);
+                    })
+            }),
         ]
     }
 
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