fixed view plane distance calculation to use tan() and convert degrees to radians

git-svn-id: svn://anubis/fart/trunk@41 7f9b0f55-74a9-4bce-be96-3c2cd072584d

main/Scene.cc

@@ -54,7 +54,7 @@ Scene::Scene(map<string, const char *> options,
     }
 
     /* view plane distance is calculated based on the field of view */
-    m_view_plane_dist = (m_height / 2.0) / atan(m_vfov / 2.0);
+    m_view_plane_dist = (m_height / 2.0) / tan(M_PI * m_vfov / 360.0);
 }
 
 Scene::~Scene()
@@ -73,7 +73,7 @@ void Scene::load(const char * filename)
 {
     /* TODO: parse file somehow */
     Shape * shape = new Sphere(1.0);
-    m_transform.translate(2.0, 2.0, 0.0);
+    m_transform.translate(2.0, 4.0, 1.0);
     shape->setTransform(m_transform);
     m_shapes.push_back(shape);
 }