library: material: add Material implementation

src/material/mod.rs

@@ -0,0 +1,56 @@
+use super::core::color::LinearColor;
+
+/// Represent the physical light properties of an object in the scene.
+#[derive(Debug, PartialEq)]
+pub struct Material {
+    /// The diffuse component.
+    diffuse: LinearColor,
+    /// The specular component.
+    specular: LinearColor,
+}
+
+impl Material {
+    pub fn new(diffuse: LinearColor, specular: LinearColor) -> Self {
+        Material { diffuse, specular }
+    }
+
+    pub fn diffuse(&self) -> &LinearColor {
+        &self.diffuse
+    }
+
+    pub fn specular(&self) -> &LinearColor {
+        &self.specular
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn new_works() {
+        let diffuse = LinearColor::new(0., 0.5, 0.);
+        let specular = LinearColor::new(1., 1., 1.);
+        let mat = Material::new(diffuse.clone(), specular.clone());
+        assert_eq!(mat, Material { diffuse, specular })
+    }
+
+    fn simple_material() -> Material {
+        Material::new(
+            LinearColor::new(0.5, 0.5, 0.5),
+            LinearColor::new(1., 1., 1.),
+        )
+    }
+
+    #[test]
+    fn diffuse_works() {
+        let mat = simple_material();
+        assert_eq!(mat.diffuse(), &LinearColor::new(0.5, 0.5, 0.5))
+    }
+
+    #[test]
+    fn specular_works() {
+        let mat = simple_material();
+        assert_eq!(mat.specular(), &LinearColor::new(1., 1., 1.))
+    }
+}