From fd535654369b31e1283a609ba8e8fcf0df42100b Mon Sep 17 00:00:00 2001
From: HampusM <hampus@hampusmat.com>
Date: Wed, 25 Oct 2023 21:15:41 +0200
Subject: feat(engine): make camera look at a target position

---
 engine/src/camera.rs | 47 +++++++++++++++++++++++++++++++++++------------
 1 file changed, 35 insertions(+), 12 deletions(-)

(limited to 'engine/src/camera.rs')

diff --git a/engine/src/camera.rs b/engine/src/camera.rs
index b98f3f4..1546960 100644
--- a/engine/src/camera.rs
+++ b/engine/src/camera.rs
@@ -1,34 +1,57 @@
-use crate::transform::Transform;
+use crate::matrix::Matrix;
 use crate::vector::Vec3;
 
 #[derive(Debug)]
 pub struct Camera
 {
-    transform: Transform,
+    position: Vec3<f32>,
+    target: Vec3<f32>,
 }
 
 impl Camera
 {
-    pub fn translate(&mut self, translation: Vec3<f32>)
+    pub fn set_position(&mut self, position: Vec3<f32>)
     {
-        self.transform.set_translation(translation);
+        self.position = position;
     }
 
-    pub(crate) fn new() -> Self
+    #[must_use]
+    pub fn position(&self) -> &Vec3<f32>
+    {
+        &self.position
+    }
+
+    pub fn set_target(&mut self, target: Vec3<f32>)
+    {
+        self.target = target;
+    }
+
+    #[must_use]
+    pub fn target(&self) -> &Vec3<f32>
     {
-        let mut transform = Transform::new();
+        &self.target
+    }
 
-        transform.set_translation(Vec3 {
+    pub(crate) fn new() -> Self
+    {
+        let position = Vec3 {
             x: 0.0,
             y: 0.0,
-            z: -3.0,
-        });
+            z: 3.0,
+        };
 
-        Self { transform }
+        Self {
+            position,
+            target: Vec3::default(),
+        }
     }
 
-    pub(crate) fn transform(&self) -> &Transform
+    pub(crate) fn as_matrix(&self) -> Matrix<f32, 4, 4>
     {
-        &self.transform
+        let mut matrix = Matrix::new();
+
+        matrix.look_at(&self.position, &self.target, &Vec3::UP);
+
+        matrix
     }
 }
-- 
cgit v1.2.3-18-g5258