// every tick, based on player screen size - calculate, store and send screen deltas.
func (p *Player) update() {
if !p.ready {
return
}
gb := p.g.board
// center board with offset width and height
ow := (p.w - p.g.w) / 2
oh := (p.h - p.g.h) / 2
// store the last rendered for network optimisation
var lastw, lasth uint16
var r rune
var c, lastc []byte
// screen loop
var u []byte
for h := 0; h < p.g.h; h++ {
for tw := 0; tw < p.g.w; tw++ {
// rune and color at terminal w x h
r = empty
c = colours[blank]
sidebar := false
if tw < sidebarWidth {
// calculate rune from sidebar
if tw == 0 {
r = filled
} else if h == 0 {
r = top
} else if h == p.g.h-1 {
r = bottom
} else {
rs := p.g.sidebar.runes
if h-1 < len(rs) && tw-1 < len(rs[h-1]) {
i := (h - 1) / sidebarEntryHeight
if i < len(p.g.sidebar.ps) {
p := p.g.sidebar.ps[i]
c = colours[p.id]
r = rs[h-1][tw-1]
sidebar = true
}
}
}
} else {
// calculate rune from game
gw := tw - sidebarWidth
h1 := h * 2
h2 := h1 + 1
// choose rune
if gb[gw][h1] != blank && gb[gw][h2] != blank {
r = filled
} else if gb[gw][h1] != blank {
r = top
} else if gb[gw][h2] != blank {
r = bottom
}
// choose color
if gb[gw][h2] == blank {
c = colours[gb[gw][h1]]
} else {
c = colours[gb[gw][h2]]
}
}
cacheOverride := p.g.sidebar.changed && sidebar
// player board is different? draw it
if p.screen[tw][h] != r || cacheOverride {
// p.logf("rune differs '%s' %dx%d (%v)", string(r), tw, h, cacheOverride)
// skip if we only moved one space right
nexth := uint16(h + 1 + oh)
nextw := uint16(tw + 1 + ow)
if nexth != lasth || nextw != lastw+1 {
u = append(u, ansi.Goto(nexth, nextw)...)
lasth = nexth
lastw = nextw
}
// skip if we didnt change color
if c != nil && bytes.Compare(c, lastc) != 0 {
u = append(u, c...)
lastc = c
}
// write rune
u = append(u, []byte(string(r))...)
// cache
p.screen[tw][h] = r
}
}
}
if len(u) == 0 {
return
}
// p.logf("send %d", len(u))
p.conn.Write(u)
}
// while preventing player from moving into itself (odd<->even)
((d%2 == 0 && d-1 != b[2]) || ((d+1)%2 == 0 && d+1 != b[2])) {
p.nextd = Direction(b[2])
continue
}
// respawn!
if b[0] == 13 {
p.respawn()
continue
}
// p.logf("sent action %+v", b)
}
p.teardown()
}
var resizeTmpl = string(ansi.Goto(2, 5)) +
string(ansi.Set(ansi.White)) +
"Please resize your terminal to %dx%d (+%dx+%d)"
func (p *Player) resizeWatch() {
for r := range p.resizes {
p.w = int(r.width)
p.h = int(r.height)
// fits?
if p.w >= p.g.w && p.h >= p.g.h {
p.conn.EraseScreen()
p.resetScreen()
// send updates!
p.ready = true
} else {
