refactor(engine): make PointLight non-exhaustive & add builder

2 files changed, 32 insertions, 0 deletions

diff --git a/engine/src/lighting.rs b/engine/src/lighting.rs
index e79c1bc..bfc2d9b 100644
--- a/engine/src/lighting.rs
+++ b/engine/src/lighting.rs
@@ -3,12 +3,24 @@ use ecs::{Component, Sole};
 use crate::color::Color;
 use crate::util::builder;
 
+builder! {
+#[builder(name = PointLightBuilder, derives = (Debug, Clone))]
 #[derive(Debug, Clone, Component)]
+#[non_exhaustive]
 pub struct PointLight
 {
     pub diffuse: Color<f32>,
     pub specular: Color<f32>,
 }
+}
+
+impl PointLight
+{
+    pub fn builder() -> PointLightBuilder
+    {
+        PointLightBuilder::default()
+    }
+}
 
 impl Default for PointLight
 {
@@ -21,6 +33,14 @@ impl Default for PointLight
     }
 }
 
+impl Default for PointLightBuilder
+{
+    fn default() -> Self
+    {
+        PointLight::default().into()
+    }
+}
+
 builder! {
 /// Global light properties.
 #[builder(name = GlobalLightBuilder, derives = (Debug, Clone, Default))]
diff --git a/engine/src/util.rs b/engine/src/util.rs
index 409b98f..532bdee 100644
--- a/engine/src/util.rs
+++ b/engine/src/util.rs
@@ -77,6 +77,18 @@ macro_rules! builder {
                 }
             }
         }
+
+        impl From<$name> for $builder_name
+        {
+            fn from(built: $name) -> Self
+            {
+                Self {
+                    $(
+                        $field: built.$field,
+                    )*
+                }
+            }
+        }
     };
 }