--- a/demos/render_nff.py	Sun Apr 20 16:48:24 2008 +0200
+++ b/demos/render_nff.py	Sun Apr 20 19:27:59 2008 +0200
@@ -2,7 +2,7 @@
 
 # read nff data from standart input and render image to render_nff.png
 # see http://tog.acm.org/resources/SPD/
-# only spheres and triangles are implemented
+# cylinders are not implemented
 
 from raytracer import Raytracer, Camera, Light, Material, Sphere, NormalVertex, Triangle
 from math import pi
@@ -72,6 +72,18 @@
 		rt.addshape(Triangle(vertices[0], vertices[1], vertices[2], mat))
 		for i in range(vertex_count)[3:]:
 			rt.addshape(Triangle(vertices[0], vertices[i-1], vertices[i], mat))
+	elif ln[0] == 'pp':	# Polygonal patch
+		mat.setSmooth(True)
+		vertex_count = int(ln[1])
+		vertices = []
+		for i in range(vertex_count):
+			ln = f.readline().split()
+			vertex = (float(ln[0]), float(ln[1]), float(ln[2]))
+			normal = (float(ln[3]), float(ln[4]), float(ln[5]))
+			vertices.append(NormalVertex(vertex, normal))
+		rt.addshape(Triangle(vertices[0], vertices[1], vertices[2], mat))
+		for i in range(vertex_count)[3:]:
+			rt.addshape(Triangle(vertices[0], vertices[i-1], vertices[i], mat))
 	else:
 		print "Not implemented:", line
 f.close()

--- a/include/scene.h	Sun Apr 20 16:48:24 2008 +0200
+++ b/include/scene.h	Sun Apr 20 19:27:59 2008 +0200
@@ -66,18 +66,18 @@
 	Vector3 eye, p, u, v;
 	Float F;
 
-	Camera(): eye(0,0,10), p(0,0,-1), u(-1,0,0), v(0,1,0), F(0.7071) {};
+	Camera(): eye(0,0,10), p(0,0,-1), u(-1,0,0), v(0,1,0), F(2.*tan(M_PI/8.)) {};
 	Camera(const Vector3 &C, const Vector3 &ap, const Vector3 &au, const Vector3 &av):
-		eye(C), p(ap), u(au), v(av), F(0.7071) {};
+		eye(C), p(ap), u(au), v(av), F(2.*tan(M_PI/8.)) {};
 	Camera(const Vector3 &from, const Vector3 &lookat, const Vector3 &up):
-		eye(from), F(0.7071)
+		eye(from), F(2.*tan(M_PI/8.))
 	{
 		p = lookat - from; u = cross(up, p);
 		p.normalize(); u.normalize();
 		v = cross(p, u);
 	};
 	void setEye(const Vector3 &aeye) { eye = aeye; };
-	void setAngle(const Float angle) { F = sin(angle); };
+	void setAngle(const Float angle) { F = 2.*tan(angle/2.); };
 	void rotate(const Quaternion &q);
 	void move(const Float fw, const Float left, const Float up);