package blocks import ( "github.com/hajimehoshi/go-ebiten/graphics" "github.com/hajimehoshi/go-ebiten/graphics/matrix" "github.com/hajimehoshi/go-ebiten/ui" "image/color" "math/rand" "time" ) func init() { texturePaths["empty"] = "images/blocks/empty.png" } type GameScene struct { field *Field rand *rand.Rand currentPiece *Piece currentPieceX int currentPieceY int currentPieceAngle Angle nextPiece *Piece landingCount int } func NewGameScene() *GameScene { return &GameScene{ field: NewField(), rand: rand.New(rand.NewSource(time.Now().UnixNano())), } } const emptyWidth = 16 const emptyHeight = 16 const fieldWidth = blockWidth * fieldBlockNumX const fieldHeight = blockHeight * fieldBlockNumY func (s *GameScene) choosePiece() *Piece { num := NormalBlockTypeNum blockType := BlockType(s.rand.Intn(num) + 1) return Pieces[blockType] } func (s *GameScene) initCurrentPiece(piece *Piece) { s.currentPiece = piece x, y := s.currentPiece.InitialPosition() s.currentPieceX = x s.currentPieceY = y s.currentPieceAngle = Angle0 } func (s *GameScene) Update(state *GameState) { const maxLandingCount = 60 if s.currentPiece == nil { s.initCurrentPiece(s.choosePiece()) } if s.nextPiece == nil { s.nextPiece = s.choosePiece() } piece := s.currentPiece x := s.currentPieceX y := s.currentPieceY angle := s.currentPieceAngle moved := false if state.Input.StateForKey(ui.KeySpace) == 1 { s.currentPieceAngle = s.field.RotatePieceRight(piece, x, y, angle) moved = angle != s.currentPieceAngle } if l := state.Input.StateForKey(ui.KeyLeft); l == 1 || (10 <= l && l%2 == 0) { s.currentPieceX = s.field.MovePieceToLeft(piece, x, y, angle) moved = x != s.currentPieceX } if r := state.Input.StateForKey(ui.KeyRight); r == 1 || (10 <= r && r%2 == 0) { s.currentPieceX = s.field.MovePieceToRight(piece, x, y, angle) moved = y != s.currentPieceX } if d := state.Input.StateForKey(ui.KeyDown); (d-1)%2 == 0 { s.currentPieceY = s.field.DropPiece(piece, x, y, angle) moved = y != s.currentPieceY } if moved { s.landingCount = 0 } else if !s.field.PieceDroppable(piece, x, y, angle) { if 0 < state.Input.StateForKey(ui.KeyDown) { s.landingCount += 10 } else { s.landingCount++ } if maxLandingCount <= s.landingCount { s.field.AbsorbPiece(piece, x, y, angle) s.initCurrentPiece(s.nextPiece) s.nextPiece = nil s.landingCount = 0 } } } func (s *GameScene) Draw(context graphics.Context, textures Textures) { context.Fill(0xff, 0xff, 0xff) field := textures.GetTexture("empty") geoMat := matrix.IdentityGeometry() geoMat.Scale( float64(fieldWidth)/float64(emptyWidth), float64(fieldHeight)/float64(emptyHeight)) geoMat.Translate(20, 20) // magic number? colorMat := matrix.IdentityColor() colorMat.Scale(color.RGBA{0, 0, 0, 0x80}) graphics.DrawWhole( context.Texture(field), emptyWidth, emptyHeight, geoMat, colorMat) geoMat = matrix.IdentityGeometry() geoMat.Translate(20, 20) s.field.Draw(context, textures, geoMat) if s.currentPiece != nil { s.currentPiece.Draw( context, textures, 20, 20, s.currentPieceX, s.currentPieceY, s.currentPieceAngle) } }