From 7bb8a36f8bcb2a6d0293aa8010998d4712d62caa Mon Sep 17 00:00:00 2001
From: CJSatnarine <satnarinecj101@gmail.com>
Date: Wed, 10 Jul 2024 19:14:24 -0400
Subject: [PATCH] Implement emissive materials

---
 material.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/material.h b/material.h
index 500ad0a..d1882ad 100644
--- a/material.h
+++ b/material.h
@@ -10,6 +10,10 @@ class material {
     public:
         virtual ~material() = default;
 
+        virtual colour emitted(double u, double v, const point3& p) const {
+            return colour(0,0,0);
+        }
+
         virtual bool scatter(const ray& rIn, const hitRecord& rec, colour& attenuation, ray& scattered) const {
             return false;
         }
@@ -88,4 +92,17 @@ class dielectric : public material {
         }
 };
 
+class diffuseLight : public material {
+  public:
+    diffuseLight(shared_ptr<texture> tex) : tex(tex) {}
+    diffuseLight(const colour& emit) : tex(make_shared<solidColour>(emit)) {}
+
+    colour emitted(double u, double v, const point3& p) const override {
+        return tex->value(u, v, p);
+    }
+
+  private:
+    shared_ptr<texture> tex;
+};
+
 #endif
\ No newline at end of file