func collide(pt draw.Point, p *Piece) bool {
pt.X = (pt.X - rboard.Min.X) / pcsz
pt.Y = (pt.Y - rboard.Min.Y) / pcsz
for _, q := range p.d {
pt.X += q.X
pt.Y += q.Y
if pt.X < 0 || pt.X >= NX || pt.Y < 0 || pt.Y >= NY {
return true
continue
}
if board[pt.Y][pt.X] != 0 {
return true
}
}
return false
}
func (t *Tiler) Draw(dst draw.Image, clipr draw.Rectangle) {
if t.current == nil {
panic("no current")
}
min := draw.Point{
roundDown(clipr.Min.X, t.tileSize),
roundDown(clipr.Min.Y, t.tileSize),
}
var p draw.Point
for p.Y = min.Y; p.Y < clipr.Max.Y; p.Y += t.tileSize {
for p.X = min.X; p.X < clipr.Max.X; p.X += t.tileSize {
tile := t.all.Get(p.X, p.Y, t.calc)
if tile == nil {
tile = NewTile(
draw.Rect(p.X, p.Y, p.X+t.tileSize, p.Y+t.tileSize),
t.calc,
nil,
false,
)
t.all.Set(p.X, p.Y, t.calc, tile)
t.current[tile] = true
tile.Go(t.updatec)
} else if !t.current[tile] {
tile.Go(t.updatec)
}
tile.Draw(dst, clipr)
}
}
}
func canfit(p *Piece) bool {
var dx = [...]int{0, -1, 1, -2, 2, -3, 3, 4, -4}
j := N + 1
if j >= 4 {
j = p.sz.X
if j < p.sz.Y {
j = p.sz.Y
}
j = 2*j - 1
}
for i := 0; i < j; i++ {
var z draw.Point
z.X = pos.X + dx[i]*pcsz
z.Y = pos.Y
if !collide(z, p) {
z.Y = pos.Y + pcsz - 1
if !collide(z, p) {
undrawpiece()
pos.X = z.X
return true
}
}
}
return false
}