naive color driven sub-sampling
slightly optimized KdTree::nearest_intersection
fixed bug in Box::intersect
fixed stripes on spheres in spheres_ao.py (was caused by AO distance)
new KdTree property: max_depth
minor changes in realtime.py
#ifndef IMAGE_H#define IMAGE_H#define IMG_GRAYSCALE 1#define IMG_RGB 3/* raw image */struct image { int pixel_size; /* should be 1 for grayscale and 3 for RGB*/ int width; int height; char *data;};int new_image(struct image **img, int width, int height, int pixelsize);int destroy_image(struct image **img);int save_png(const char *fname, struct image *img);#endif