packetize Phong shader
new scons config options:
simd=(yes|no) - allow/suppress explicit SSE
force_flags=(yes|no) - force use of specified flags instead of autodetected
profile=(yes|no) - enable gcc's profiling (-pg option)
check for pthread.h header, don't try to build without it
add fourth Vector3 component for better memory aligning
rename Vector3 to Vector
partialy SSE-ize Vector class (only fully vertical operations)
build static lib and python module in distinctive directories
to avoid collision of library file names on some platforms
Classes
-------
vector.h -- vector of three scalars, also used for colour
matrix.h -- matrix class, currently not used
quaternion.h -- quaternion class for camera rotation
container.h -- container for shapes, base class for octree and kd-tree
octree.h -- Octree space subdivision structure for acceleration of ray-shape intersection search
kdtree.h -- KdTree space subdivision structure
scene.h -- scene objects: Ray, Light, Camera and shapes
raytracer.h -- ray tracer class
common.h -- Float definition (float/double) and some helper functions
Container Usage
---------------
(Container|Octree|KdTree) top;
scene.setTop(top) // top object in hierarchy
top.optimize() // build optimization structure
Rework camera
-------------
Sampler - generate points in screen plane
Camera - transform point from sampler to a ray