added jitter and radius parameters to light objects; not using them yet

git-svn-id: svn://anubis/fart/trunk@255 7f9b0f55-74a9-4bce-be96-3c2cd072584d

main/Light.cc

@@ -1,11 +1,18 @@
 
 #include "Light.h"
 #include "util/Vector.h"
+#include "util/Ray.h"
 
 Light::Light()
 {
     m_position = Vector(0, 0, 0);
     m_diffuse_color = Color::white;
     m_specular_color = Color::white;
+    m_jitter = 1;
+    m_radius = 1.0;
 }
 
+Vector Light::getJitterPosition() const
+{
+    return m_position + Vector::randomVector() * m_radius;
+}

main/Light.h

@@ -14,6 +14,8 @@ class Light
         void setPosition(refptr<Vector> vec) { setPosition(*vec); }
         const Vector & getPosition() const { return m_position; }
 
+        Vector getJitterPosition() const;
+
         void setDiffuseColor(const Color & diffuse)
         {
             m_diffuse_color = diffuse;
@@ -25,11 +27,15 @@ class Light
             m_specular_color = specular;
         }
         const Color & getSpecularColor() const { return m_specular_color; }
+        void setJitter(int j) { m_jitter = j; }
+        int getJitter() const { return m_jitter; }
 
     protected:
         Vector m_position;
         Color m_diffuse_color;
         Color m_specular_color;
+        double m_radius;
+        int m_jitter;
 };
 
 #include "PointLight.h"