generateIcon.R

t <- seq(0,8*pi,.01)
w <- pnorm(t, 4*pi, .7)
n <- length(t)
pitchDiff <- 6
sin1 <- sin(t) + pitchDiff
sin2 <- sin(t)
x <- sin1 * w + sin2 * (1-w)

pad <- 3

for (sz in c(16,22,24,32,48,64,128)) {
  lineWidth <- 15 * sz/200
  outlineWidth <- 20 * sz/200
  png(sprintf("~/code/tonioni/icons/tony-%ix%i.png",sz,sz), width = sz, height = sz, bg="transparent")
  par(mar=c(0,0,0,0))
  plot(t, x, type='l', 
       lwd=lineWidth*3, bty='n', xaxt='n', yaxt='n',
       ylim = c(-pad, pitchDiff+pad) + c(1,-1)*0.1,
       xlim = c(0, 8*pi) + c(1,-1)*0.1,
       col="white")
  lines(t, x, 
        lwd=lineWidth, col = "black")
  lines(c(0,0),c(-pad,pitchDiff+pad), lwd=outlineWidth, col = 'blue', lend=2)
  lines(c(0,0)+8*pi,c(-pad,pitchDiff+pad), lwd=outlineWidth, col = 'blue', lend=2)
  lines(c(0,8*pi),c(0,0)+pitchDiff+pad, lwd=outlineWidth, col = 'blue', lend=2)
  lines(c(0,8*pi),c(0,0)-pad, lwd=outlineWidth, col = 'blue', lend=2)
  dev.off()
}