move shapes to extra source file
add serialize header and source file with common serialization functions
dump/load feature for shapes and kd-tree
fix few minor bugs
Bugs==== * (none known)Future Plans============ * textures (3D procedural, pixmaps) * generalization: Camera "shader" (ray generator), surface shader and maybe light & background shaders * namespace * Python binding for all classes * stochastic oversampling * absorbtion of refracted rays in dense materials (can be computed using shape distance and some 'absorbance' constant) * implement efficient AABB-ray intersection using Plucker coordinatesNew Classes?============shapes.h -- Triangle, Spherescene.h -- Ray, Light, Camera, Scenematerial.h -- Material, Texturereader.h -- Reader, WavefrontReaderwf = new WavefrontReader()wf.setContainer(top)wf.setTransform(monkey_pos_matrix)wf.read("monkey.obj")// more transform&readsdestroy wfScene scene -- container with shapes, a camera and lightsscene = new Scene()scene.setCamera(new Camera(eye, u, v, p))scene.addLight(new PointLight(pos, color))rt.setScene(scene)rt.render(w,h)constructors have zero or one parameter by default -- the object to copy data frommore parameters -- the data (ray origin and direction)