From 887233e3e4a27c2db99be57b68e1ab7f40e5e0f0 Mon Sep 17 00:00:00 2001
From: Eryn Wells <eryn@erynwells.me>
Date: Fri, 13 Sep 2013 18:39:11 -0700
Subject: [PATCH] Add diffuse parameters to Material

---
 src/material.cc | 44 +++++++++++++++++++++++++++++++++++++++-----
 src/material.h  | 18 +++++++++++++++---
 2 files changed, 54 insertions(+), 8 deletions(-)

diff --git a/src/material.cc b/src/material.cc
index 574ff58..632a818 100644
--- a/src/material.cc
+++ b/src/material.cc
@@ -8,16 +8,50 @@
 #include "material.h"
 
 
-Color
-Material::get_color()
+Material::Material()
+    : diffuse_level(1.0),
+      diffuse_color(Color::Black)
+{ }
+
+
+float
+Material::get_diffuse_level()
     const
 {
-    return color;
+    return diffuse_level;
 }
 
 
 void
-Material::set_color(const Color &c)
+Material::set_diffuse_level(const float &kd)
 {
-    color = c;
+    diffuse_level = kd;
+    _clamp_parameter(diffuse_level);
+}
+
+
+const Color &
+Material::get_diffuse_color()
+    const
+{
+    return diffuse_color;
+}
+
+
+void
+Material::set_diffuse_color(const Color &c)
+{
+    diffuse_color = c;
+}
+
+
+void
+Material::_clamp_parameter(float &param)
+{
+    if (param < 0.0) {
+        param = 0.0;
+    }
+    else if (param > 1.0) {
+        param = 1.0;
+    }
 }
diff --git a/src/material.h b/src/material.h
index c6b51de..60950cf 100644
--- a/src/material.h
+++ b/src/material.h
@@ -14,11 +14,23 @@
 class Material
 {
 public:
-    Color get_color() const;
-    void set_color(const Color &c);
+    enum {
+        DiffuseLightingTypeLambert = 1,
+    } DiffuseLightingType;
+
+    Material();
+
+    float get_diffuse_level() const;
+    void set_diffuse_level(const float &kd);
+    const Color &get_diffuse_color() const;
+    void set_diffuse_color(const Color &c);
 
 private:
-    Color color;
+    void _clamp_parameter(float &param);
+
+    // Diffusion parameters.
+    float diffuse_level;
+    Color diffuse_color;
 };
 
 #endif