void vox_framebuf(struct voxscape *vox, int xres, int yres, uint32_t *fb, int horizon);
/* negative height for auto at -h above terrain */
void vox_view(struct voxscape *vox, int32_t x, int32_t y, int h, int32_t angle);
void vox_framebuf(struct voxscape *vox, int xres, int yres, uint32_t *fb, int horizon);
/* negative height for auto at -h above terrain */
void vox_view(struct voxscape *vox, int32_t x, int32_t y, int h, int32_t angle);