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## Game of Life
## Author: Linlin Yan <linlin.yan@cos.name>; modified by Yihui Xie
## URL: http://cos.name/cn/topic/15402
library(animation)
oopt = ani.options()
run_life <- function(file, generation = ani.options('nmax'), fg = 'black', bg = 'transparent', wrap = TRUE) {
load_life <- function(file) {
s <- readLines(file)
n <- as.integer(strsplit(s[1], ' ')[[1]])
w <- n[1]; h <- n[2]; x <- n[3]; y <- n[4]
s <- strsplit(s[-1], '')
m <- matrix(0, w, h)
for (i in seq_along(s)) {
for (j in seq_along(s[[i]])) {
yy <- y + i - 1
xx <- x + j - 1
if (yy > 0 && yy < h && xx > 1 && xx < w) {
m[xx, yy] <- (s[[i]][j] != ' ')
}
}
}
return (m)
}
next_generation <- function(m) {
if (wrap) {
m <- m[c(ncol(m), 1:ncol(m), 1), c(nrow(m), 1:nrow(m), 1)]
} else {
m <- cbind(0, rbind(0, m, 0), 0)
}
x0 <- c(-2, -1)
x1 <- c(-1, -ncol(m))
x2 <- c(-(ncol(m) - 1), -ncol(m))
y0 <- c(-2, -1)
y1 <- c(-1, -nrow(m))
y2 <- c(-(nrow(m) - 1), -nrow(m))
f <- function(a, b) { b == 3 | (b == 2 & a == 1) }
m <- f(m[y1, x1],
m[y0, x0] + m[y0, x1] + m[y0, x2] +
m[y1, x0] + m[y1, x2] +
m[y2, x0] + m[y2, x1] + m[y2, x2])
return(m)
}
draw_life <- function(m) {
par(mar = rep(0.1, 4))
image(m, col = c(bg, fg), axes = FALSE)
box()
}
m <- load_life(file)
for (i in 1:generation) {
dev.hold()
draw_life(m)
m <- next_generation(m)
ani.pause()
}
}
ani.options(ani.width=600, ani.height=600)
saveHTML({
life_demo = textConnection(
'50 50 5 45
111
1
1')
ani.options(interval = 0.05, nmax = 165)
run_life(life_demo)
close(life_demo)
}, img.name='life_demo', htmlfile='life_demo.html', description = 'The first demo.')
saveHTML({
ani.options(interval = 0.05, nmax = 300)
life_gun = textConnection('100 100 5 5
*
* *
** ** **
* * ** **
** * * **
** * * ** * *
* * *
* *
**')
run_life(life_gun)
close(life_gun)
}, img.name='life_gun', htmlfile='life_gun.html',
single.opts = "'controls': ['first', 'previous', 'play', 'next', 'last', 'loop', 'speed'], 'delayMin': 0",
description = "Gosper's Glider Gun!")
## puffer train
life_train = textConnection('200 200 50 50
* *
*
* *
****
*
**
*
*
*
* *
*
* *
****')
ani.options(interval = 0.01, nmax = 3000)
run_life(life_train)
close(life_train)
ani.options(oopt)
|
