feat(engine): add basic flat lighting

1 files changed, 93 insertions, 0 deletions

diff --git a/engine/src/lighting.rs b/engine/src/lighting.rs
new file mode 100644
index 0000000..e7fb901
--- /dev/null
+++ b/engine/src/lighting.rs
@@ -0,0 +1,93 @@
+use crate::color::Color;
+use crate::vector::Vec3;
+
+#[derive(Debug, Clone)]
+pub struct LightSettings
+{
+    pub ambient_light_strength: f32,
+    pub specular_light_strength: f32,
+    pub specular_shininess: u32,
+}
+
+impl Default for LightSettings
+{
+    fn default() -> Self
+    {
+        Self {
+            ambient_light_strength: 1.0,
+            specular_light_strength: 0.0,
+            specular_shininess: 32,
+        }
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct LightSource
+{
+    position: Vec3<f32>,
+    color: Color<f32>,
+}
+
+impl LightSource
+{
+    #[must_use]
+    pub fn position(&self) -> &Vec3<f32>
+    {
+        &self.position
+    }
+
+    #[must_use]
+    pub fn color(&self) -> &Color<f32>
+    {
+        &self.color
+    }
+
+    pub fn translate(&mut self, translation: Vec3<f32>)
+    {
+        self.position += translation;
+    }
+}
+
+#[derive(Debug, Clone, Default)]
+pub struct LightSourceBuilder
+{
+    position: Vec3<f32>,
+    color: Color<f32>,
+}
+
+impl LightSourceBuilder
+{
+    #[must_use]
+    pub fn new() -> Self
+    {
+        Self {
+            position: Vec3::default(),
+            color: Color::WHITE_F32,
+        }
+    }
+
+    #[must_use]
+    pub fn position(mut self, position: Vec3<f32>) -> Self
+    {
+        self.position = position;
+
+        self
+    }
+
+    #[must_use]
+    pub fn color(mut self, color: Color<f32>) -> Self
+    {
+        self.color = color;
+
+        self
+    }
+
+    #[must_use]
+    pub fn build(&self) -> LightSource
+    {
+        LightSource {
+            position: self.position.clone(),
+            color: self.color.clone(),
+        }
+    }
+}