R/rayrender.R

In piecepackr/piecepackr3d: 3D Board Game Graphics

#' Create rayrender objects
#'
#' \code{piece} creates 3d board game piece objects for use with the rayrender package.
#' @inheritParams piece3d
#' @return A rayrender object.
#' @examples
#'   \donttest{
#'     if (require("rayrender")) {
#'         cfg <- pp_cfg()
#'         render_scene(piece("tile_face", suit = 3, rank = 3, cfg = cfg, x = 0, y = 0, z = 0))
#'         render_scene(piece("coin_back", suit = 4, rank = 2, cfg = cfg, x = 2, y = 0, z = 0))
#'         render_scene(piece("saucer_back", suit = 1, cfg = cfg, x = 2, y = 2, z=-2))
#'         render_scene(piece("pawn_face", suit = 2, cfg = cfg, x = 1, y = 1, z = 2))
#'     }
#'   }
#' @export
piece <- function(piece_side = "tile_back", suit = NA, rank = NA, cfg = pp_cfg(), # nolint
                           x = 0, y = 0, z = NA,
                           angle = 0, axis_x = 0, axis_y = 0,
                           width = NA, height = NA, depth = NA,
                           envir = NULL, ..., scale = 1, res = 72) {
    nn <- max(lengths(list(piece_side, suit, rank, x, y, z, angle, axis_x, axis_y, width, height, depth)))
    piece_side <- rep(piece_side, length.out = nn)
    suit <- rep(suit, length.out = nn)
    rank <- rep(rank, length.out = nn)
    x <- rep(x, length.out = nn)
    y <- rep(y, length.out = nn)
    z <- rep(z, length.out = nn)
    angle <- rep(angle, length.out = nn)
    axis_x <- rep(axis_x, length.out = nn)
    axis_y <- rep(axis_y, length.out = nn)
    width <- rep(width, length.out = nn)
    height <- rep(height, length.out = nn)
    depth <- rep(depth, length.out = nn)

    cfg <- piecepackr:::get_cfg(cfg, envir)
    cfg <- rep(c(cfg), length.out = nn)
    scene <- rr_piece_helper(piece_side[1], suit[1], rank[1], cfg[[1]],
                             x[1], y[1], z[1],
                             angle[1], axis_x[1], axis_y[1],
                             width[1], height[1], depth[1], res)
    l <- lapply(seq(nn), function(i) {
        rr_piece_helper(piece_side[i], suit[i], rank[i], cfg[[i]],
                         x[i], y[i], z[i],
                         angle[i], axis_x[i], axis_y[i],
                         width[i], height[i], depth[i], scale, res)
                             })
    list_to_scene(l)
}

list_to_scene <- function(l) {
    n <- length(l)
    scene <- l[[1]]
    if (n > 1) {
        for (i in seq(2, n)) {
            scene <- rayrender::add_object(scene, l[[i]])
        }
    }
    scene
}

rr_piece_helper <- function(piece_side = "tile_back", suit = NA, rank = NA, cfg = pp_cfg(), # nolint
                           x = 0, y = 0, z = NA,
                           angle = 0, axis_x = 0, axis_y = 0,
                           width = NA, height = NA, depth = NA, scale = 1, res = 72) {
    obj <- write_obj(piece_side, suit, rank, cfg,
                        x = x, y = y, z = z,
                        angle = angle, axis_x = axis_x, axis_y = axis_y,
                        width = width, height = height, depth = depth,
                        scale = scale, res = res)
    rayrender::obj_model(filename = obj$obj, texture = TRUE)
}