build script fixes, add ldflags build option
update and enhance demos
fix bug in 4x grid oversampling
warn if writePNG called while compiled without libpng
make shapes in ShapeList const
and add many other const needed due to snowball effect
slightly optimize Camera::makeRayPacket using _mm_shuffle_ps
make Vector SIMD vectorization disabled by default (causes problems)
fix bug in implicit reflection of transmissive surfaces,
when surface's reflection parameter is set to zero
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
New Classes?
------------
scene.h -- Scene, ...
reader.h -- Reader, WavefrontReader
wf = new WavefrontReader()
wf.setContainer(top)
wf.setTransform(monkey_pos_matrix)
wf.read("monkey.obj")
// more transform&reads
destroy wf
Scene scene -- container with shapes, a camera and lights
scene = new Scene()
scene.setCamera(new Camera(eye, u, v, p))
scene.addLight(new PointLight(pos, color))
rt.setScene(scene)
rt.render(w,h)