mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-27 12:18:55 +01:00
413 lines
9.2 KiB
Go
413 lines
9.2 KiB
Go
// Copyright 2016 The Ebiten Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package twenty48
|
|
|
|
import (
|
|
"errors"
|
|
"image/color"
|
|
"log"
|
|
"math/rand"
|
|
"sort"
|
|
"strconv"
|
|
|
|
"github.com/golang/freetype/truetype"
|
|
"golang.org/x/image/font"
|
|
|
|
"github.com/hajimehoshi/ebiten"
|
|
"github.com/hajimehoshi/ebiten/examples/resources/fonts"
|
|
"github.com/hajimehoshi/ebiten/text"
|
|
)
|
|
|
|
var (
|
|
mplusSmallFont font.Face
|
|
mplusNormalFont font.Face
|
|
mplusBigFont font.Face
|
|
)
|
|
|
|
func init() {
|
|
tt, err := truetype.Parse(fonts.MPlus1pRegular_ttf)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
const dpi = 72
|
|
mplusSmallFont = truetype.NewFace(tt, &truetype.Options{
|
|
Size: 24,
|
|
DPI: dpi,
|
|
Hinting: font.HintingFull,
|
|
})
|
|
mplusNormalFont = truetype.NewFace(tt, &truetype.Options{
|
|
Size: 32,
|
|
DPI: dpi,
|
|
Hinting: font.HintingFull,
|
|
})
|
|
mplusBigFont = truetype.NewFace(tt, &truetype.Options{
|
|
Size: 48,
|
|
DPI: dpi,
|
|
Hinting: font.HintingFull,
|
|
})
|
|
}
|
|
|
|
// TileData represents a tile information like a value and a position.
|
|
type TileData struct {
|
|
value int
|
|
x int
|
|
y int
|
|
}
|
|
|
|
// Tile represents a tile information including TileData and animation states.
|
|
type Tile struct {
|
|
current TileData
|
|
|
|
// next represents a next tile information after moving.
|
|
// next is empty when the tile is not about to move.
|
|
next TileData
|
|
|
|
movingCount int
|
|
startPoppingCount int
|
|
poppingCount int
|
|
}
|
|
|
|
// Pos returns the tile's current position.
|
|
// Pos is used only at testing so far.
|
|
func (t *Tile) Pos() (int, int) {
|
|
return t.current.x, t.current.y
|
|
}
|
|
|
|
// NextPos returns the tile's next position.
|
|
// NextPos is used only at testing so far.
|
|
func (t *Tile) NextPos() (int, int) {
|
|
return t.next.x, t.next.y
|
|
}
|
|
|
|
// Value returns the tile's current value.
|
|
// Value is used only at testing so far.
|
|
func (t *Tile) Value() int {
|
|
return t.current.value
|
|
}
|
|
|
|
// NextValue returns the tile's current value.
|
|
// NextValue is used only at testing so far.
|
|
func (t *Tile) NextValue() int {
|
|
return t.next.value
|
|
}
|
|
|
|
// NewTile creates a new Tile object.
|
|
func NewTile(value int, x, y int) *Tile {
|
|
return &Tile{
|
|
current: TileData{
|
|
value: value,
|
|
x: x,
|
|
y: y,
|
|
},
|
|
startPoppingCount: maxPoppingCount,
|
|
}
|
|
}
|
|
|
|
// IsMoving returns a boolean value indicating if the tile is animating.
|
|
func (t *Tile) IsMoving() bool {
|
|
return 0 < t.movingCount
|
|
}
|
|
|
|
func (t *Tile) stopAnimation() {
|
|
if 0 < t.movingCount {
|
|
t.current = t.next
|
|
t.next = TileData{}
|
|
}
|
|
t.movingCount = 0
|
|
t.startPoppingCount = 0
|
|
t.poppingCount = 0
|
|
}
|
|
|
|
func tileAt(tiles map[*Tile]struct{}, x, y int) *Tile {
|
|
var result *Tile
|
|
for t := range tiles {
|
|
if t.current.x != x || t.current.y != y {
|
|
continue
|
|
}
|
|
if result != nil {
|
|
panic("not reach")
|
|
}
|
|
result = t
|
|
}
|
|
return result
|
|
}
|
|
|
|
func currentOrNextTileAt(tiles map[*Tile]struct{}, x, y int) *Tile {
|
|
var result *Tile
|
|
for t := range tiles {
|
|
if 0 < t.movingCount {
|
|
if t.next.x != x || t.next.y != y || t.next.value == 0 {
|
|
continue
|
|
}
|
|
} else {
|
|
if t.current.x != x || t.current.y != y {
|
|
continue
|
|
}
|
|
}
|
|
if result != nil {
|
|
panic("not reach")
|
|
}
|
|
result = t
|
|
}
|
|
return result
|
|
}
|
|
|
|
const (
|
|
maxMovingCount = 5
|
|
maxPoppingCount = 6
|
|
)
|
|
|
|
// MoveTiles moves tiles in the given tiles map if possible.
|
|
// MoveTiles returns true if there are tiles that are to move, otherwise false.
|
|
//
|
|
// When MoveTiles is called, all tiles must not be about to move.
|
|
func MoveTiles(tiles map[*Tile]struct{}, size int, dir Dir) bool {
|
|
vx, vy := dir.Vector()
|
|
tx := []int{}
|
|
ty := []int{}
|
|
for i := 0; i < size; i++ {
|
|
tx = append(tx, i)
|
|
ty = append(ty, i)
|
|
}
|
|
if vx > 0 {
|
|
sort.Sort(sort.Reverse(sort.IntSlice(tx)))
|
|
}
|
|
if vy > 0 {
|
|
sort.Sort(sort.Reverse(sort.IntSlice(ty)))
|
|
}
|
|
|
|
moved := false
|
|
for _, j := range ty {
|
|
for _, i := range tx {
|
|
t := tileAt(tiles, i, j)
|
|
if t == nil {
|
|
continue
|
|
}
|
|
if t.next != (TileData{}) {
|
|
panic("not reach")
|
|
}
|
|
if t.IsMoving() {
|
|
panic("not reach")
|
|
}
|
|
// (ii, jj) is the next position for tile t.
|
|
// (ii, jj) is updated until a mergeable tile is found or
|
|
// the tile t can't be moved any more.
|
|
ii := i
|
|
jj := j
|
|
for {
|
|
ni := ii + vx
|
|
nj := jj + vy
|
|
if ni < 0 || ni >= size || nj < 0 || nj >= size {
|
|
break
|
|
}
|
|
tt := currentOrNextTileAt(tiles, ni, nj)
|
|
if tt == nil {
|
|
ii = ni
|
|
jj = nj
|
|
moved = true
|
|
continue
|
|
}
|
|
if t.current.value != tt.current.value {
|
|
break
|
|
}
|
|
if 0 < tt.movingCount && tt.current.value != tt.next.value {
|
|
// tt is already being merged with another tile.
|
|
// Break here without updating (ii, jj).
|
|
break
|
|
}
|
|
ii = ni
|
|
jj = nj
|
|
moved = true
|
|
break
|
|
}
|
|
// next is the next state of the tile t.
|
|
next := TileData{}
|
|
next.value = t.current.value
|
|
// If there is a tile at the next position (ii, jj), this should be
|
|
// mergeable. Let's merge.
|
|
if tt := currentOrNextTileAt(tiles, ii, jj); tt != t && tt != nil {
|
|
next.value = t.current.value + tt.current.value
|
|
tt.next.value = 0
|
|
tt.next.x = ii
|
|
tt.next.y = jj
|
|
tt.movingCount = maxMovingCount
|
|
}
|
|
next.x = ii
|
|
next.y = jj
|
|
if t.current != next {
|
|
t.next = next
|
|
t.movingCount = maxMovingCount
|
|
}
|
|
}
|
|
}
|
|
if !moved {
|
|
for t := range tiles {
|
|
t.next = TileData{}
|
|
t.movingCount = 0
|
|
}
|
|
}
|
|
return moved
|
|
}
|
|
|
|
func addRandomTile(tiles map[*Tile]struct{}, size int) error {
|
|
cells := make([]bool, size*size)
|
|
for t := range tiles {
|
|
if t.IsMoving() {
|
|
panic("not reach")
|
|
}
|
|
i := t.current.x + t.current.y*size
|
|
cells[i] = true
|
|
}
|
|
availableCells := []int{}
|
|
for i, b := range cells {
|
|
if b {
|
|
continue
|
|
}
|
|
availableCells = append(availableCells, i)
|
|
}
|
|
if len(availableCells) == 0 {
|
|
return errors.New("twenty48: there is no space to add a new tile")
|
|
}
|
|
c := availableCells[rand.Intn(len(availableCells))]
|
|
v := 2
|
|
if rand.Intn(10) == 0 {
|
|
v = 4
|
|
}
|
|
x := c % size
|
|
y := c / size
|
|
t := NewTile(v, x, y)
|
|
tiles[t] = struct{}{}
|
|
return nil
|
|
}
|
|
|
|
// Update updates the tile's animation states.
|
|
func (t *Tile) Update() error {
|
|
switch {
|
|
case 0 < t.movingCount:
|
|
t.movingCount--
|
|
if t.movingCount == 0 {
|
|
if t.current.value != t.next.value && 0 < t.next.value {
|
|
t.poppingCount = maxPoppingCount
|
|
}
|
|
t.current = t.next
|
|
t.next = TileData{}
|
|
}
|
|
case 0 < t.startPoppingCount:
|
|
t.startPoppingCount--
|
|
case 0 < t.poppingCount:
|
|
t.poppingCount--
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func colorToScale(clr color.Color) (float64, float64, float64, float64) {
|
|
r, g, b, a := clr.RGBA()
|
|
rf := float64(r) / 0xffff
|
|
gf := float64(g) / 0xffff
|
|
bf := float64(b) / 0xffff
|
|
af := float64(a) / 0xffff
|
|
// Convert to non-premultiplied alpha components.
|
|
if 0 < af {
|
|
rf /= af
|
|
gf /= af
|
|
bf /= af
|
|
}
|
|
return rf, gf, bf, af
|
|
}
|
|
|
|
func mean(a, b int, rate float64) int {
|
|
return int(float64(a)*(1-rate) + float64(b)*rate)
|
|
}
|
|
|
|
func meanF(a, b float64, rate float64) float64 {
|
|
return a*(1-rate) + b*rate
|
|
}
|
|
|
|
const (
|
|
tileSize = 80
|
|
tileMargin = 4
|
|
)
|
|
|
|
var (
|
|
tileImage *ebiten.Image
|
|
)
|
|
|
|
func init() {
|
|
tileImage, _ = ebiten.NewImage(tileSize, tileSize, ebiten.FilterDefault)
|
|
tileImage.Fill(color.White)
|
|
}
|
|
|
|
// Draw draws the current tile to the given boardImage.
|
|
func (t *Tile) Draw(boardImage *ebiten.Image) {
|
|
i, j := t.current.x, t.current.y
|
|
ni, nj := t.next.x, t.next.y
|
|
v := t.current.value
|
|
if v == 0 {
|
|
return
|
|
}
|
|
op := &ebiten.DrawImageOptions{}
|
|
x := i*tileSize + (i+1)*tileMargin
|
|
y := j*tileSize + (j+1)*tileMargin
|
|
nx := ni*tileSize + (ni+1)*tileMargin
|
|
ny := nj*tileSize + (nj+1)*tileMargin
|
|
switch {
|
|
case 0 < t.movingCount:
|
|
rate := 1 - float64(t.movingCount)/maxMovingCount
|
|
x = mean(x, nx, rate)
|
|
y = mean(y, ny, rate)
|
|
case 0 < t.startPoppingCount:
|
|
rate := 1 - float64(t.startPoppingCount)/float64(maxPoppingCount)
|
|
scale := meanF(0.0, 1.0, rate)
|
|
op.GeoM.Translate(float64(-tileSize/2), float64(-tileSize/2))
|
|
op.GeoM.Scale(scale, scale)
|
|
op.GeoM.Translate(float64(tileSize/2), float64(tileSize/2))
|
|
case 0 < t.poppingCount:
|
|
const maxScale = 1.2
|
|
rate := 0.0
|
|
if maxPoppingCount*2/3 <= t.poppingCount {
|
|
// 0 to 1
|
|
rate = 1 - float64(t.poppingCount-2*maxPoppingCount/3)/float64(maxPoppingCount/3)
|
|
} else {
|
|
// 1 to 0
|
|
rate = float64(t.poppingCount) / float64(maxPoppingCount*2/3)
|
|
}
|
|
scale := meanF(1.0, maxScale, rate)
|
|
op.GeoM.Translate(float64(-tileSize/2), float64(-tileSize/2))
|
|
op.GeoM.Scale(scale, scale)
|
|
op.GeoM.Translate(float64(tileSize/2), float64(tileSize/2))
|
|
}
|
|
op.GeoM.Translate(float64(x), float64(y))
|
|
r, g, b, a := colorToScale(tileBackgroundColor(v))
|
|
op.ColorM.Scale(r, g, b, a)
|
|
boardImage.DrawImage(tileImage, op)
|
|
str := strconv.Itoa(v)
|
|
|
|
f := mplusBigFont
|
|
switch {
|
|
case 3 < len(str):
|
|
f = mplusSmallFont
|
|
case 2 < len(str):
|
|
f = mplusNormalFont
|
|
}
|
|
|
|
bound, _ := font.BoundString(f, str)
|
|
w := (bound.Max.X - bound.Min.X).Ceil()
|
|
h := (bound.Max.Y - bound.Min.Y).Ceil()
|
|
x = x + (tileSize-w)/2
|
|
y = y + (tileSize-h)/2 + h
|
|
text.Draw(boardImage, str, f, x, y, tileColor(v))
|
|
}
|