1 files changed, 61 insertions, 0 deletions
diff --git a/stockton-skeleton/src/components/mod.rs b/stockton-skeleton/src/components/mod.rs
new file mode 100644
index 0000000..74e5a69
--- /dev/null
+++ b/stockton-skeleton/src/components/mod.rs
@@ -0,0 +1,61 @@
+use na::{Mat4, Vec4};
+use std::f32::consts::PI;
+
+use crate::types::Vector3;
+
+/// 90 degrees in radians
+const R89: f32 = (PI / 180.0) * 89.0;
+
+/// 180 degrees in radians
+const R180: f32 = PI;
+
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct Transform {
+    /// Position of the object
+    pub position: Vector3,
+
+    /// Rotation of the object (euler angles in radians)
+    pub rotation: Vector3,
+}
+
+impl Transform {
+    pub fn rotate(&mut self, vec: Vector3) {
+        self.rotation += vec;
+
+        // Clamp -pi/2 < pitch < pi/2
+        if self.rotation.x > R89 {
+            self.rotation.x = R89;
+        } else if self.rotation.x <= -R89 {
+            self.rotation.x = -R89;
+        }
+
+        // -pi < yaw <= pi
+        if self.rotation.y <= -R180 {
+            self.rotation.y = R180 - self.rotation.y % -R180;
+        } else if self.rotation.y > 180.0 {
+            self.rotation.y = -R180 + self.rotation.y % R180;
+        }
+    }
+
+    pub fn translate(&mut self, delta: Vector3) {
+        let rot_matrix =
+            Mat4::from_euler_angles(-self.rotation.x, self.rotation.y, self.rotation.z);
+
+        let new = rot_matrix * Vec4::new(delta.x, delta.y, delta.z, 1.0);
+        self.position.x += new.x;
+        self.position.y += new.y;
+        self.position.z += new.z;
+    }
+}
+
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct CameraSettings {
+    /// FOV (radians)
+    pub fov: f32,
+
+    /// Near clipping plane (world units)
+    pub near: f32,
+
+    /// Far clipping plane (world units)
+    pub far: f32,
+}