Object::Intersect

A new intersect method that converts to object space before doing the intersection. Now all objects are at their own origin!

src/object.cc

@@ -22,6 +22,9 @@ namespace charles {
 
 #pragma mark - Objects
 
+/*
+ * charles::Object::Object --
+ */
 Object::Object(const Vector4& origin)
     : mTranslation(basics::TranslationMatrix(origin.X(), origin.Y(), origin.Z())),
       mMaterial()
@@ -49,6 +52,37 @@ Object::SetMaterial(const Material& material)
 }
 
 
+/*
+ * charles::Object::Intersect --
+ */
+bool
+Object::Intersect(const basics::Ray& ray,
+                  TVector& t,
+                  Stats& stats)
+    const
+{
+    /* TODO: Remove basics:: when the old Ray class goes away. */
+    basics::Ray objRay = ToObjectSpace(ray);
+    return DoIntersect(objRay, t, stats);
+}
+
+
+/*
+ * charles::Object::ToObjectSpace --
+ */
+/* TODO: Remove basics:: when the old Ray class goes away. */
+basics::Ray
+Object::ToObjectSpace(const basics::Ray& ray)
+    const
+{
+    /* TODO: Remove basics:: when the old Ray class goes away. */
+    basics::Ray objRay(ray);
+    objRay.origin = mTranslation * objRay.origin;
+    objRay.direction = mTranslation * objRay.direction;
+    return objRay;
+}
+
+
 void
 Object::Write(std::ostream& ost)
     const