initial (bad) voxel renderer

src/client/camera.rs

@@ -0,0 +1,44 @@
+use nalgebra::{Point3, Rotation3, UnitVector3, Vector3};
+
+const DEFAULT_ASPECT_RATIO: f32 = 16. / 9.;
+
+#[derive(Debug, Clone, Copy)]
+pub struct Camera {
+    pub pos: Point3<f32>,
+    pub orientation: Rotation3<f32>,
+    pub aspect: f32,
+    pub scale: f32,
+}
+
+impl Default for Camera {
+    fn default() -> Self {
+        Self {
+            pos: Point3::origin(),
+            orientation: Rotation3::identity(),
+            aspect: DEFAULT_ASPECT_RATIO,
+            scale: 1.0,
+        }
+    }
+}
+
+impl Camera {
+    pub fn left(&self) -> UnitVector3<f32> {
+        self.orientation * -Vector3::x_axis()
+    }
+    pub fn right(&self) -> UnitVector3<f32> {
+        self.orientation * Vector3::x_axis()
+    }
+    pub fn down(&self) -> UnitVector3<f32> {
+        self.orientation * -Vector3::y_axis()
+    }
+    pub fn up(&self) -> UnitVector3<f32> {
+        self.orientation * Vector3::y_axis()
+    }
+    pub fn backward(&self) -> UnitVector3<f32> {
+        self.orientation * -Vector3::z_axis()
+    }
+    pub fn forward(&self) -> UnitVector3<f32> {
+        self.orientation * Vector3::z_axis()
+    }
+}
+