package blocks import ( "github.com/hajimehoshi/go-ebiten/graphics" "github.com/hajimehoshi/go-ebiten/graphics/matrix" "github.com/hajimehoshi/go-ebiten/ui" "image/color" ) func init() { texturePaths["background"] = "images/blocks/background.png" } type TitleScene struct { count int } func NewTitleScene() *TitleScene { return &TitleScene{} } func (s *TitleScene) Update(state *GameState) { s.count++ if state.Input.StateForKey(ui.KeySpace) == 1 { state.SceneManager.GoTo(NewGameScene()) } } func (s *TitleScene) Draw(context graphics.Context) { drawTitleBackground(context, s.count) drawLogo(context, "BLOCKS") message := "PRESS SPACE TO START" x := (ScreenWidth-textWidth(message)) / 2 y := ScreenHeight-48 drawTextWithShadow(context, message, x, y, 1, color.RGBA{0x80, 0, 0, 0xff}) } func drawTitleBackground(context graphics.Context, c int) { const textureWidth = 32 const textureHeight = 32 backgroundTextureId := drawInfo.textures["background"] parts := []graphics.TexturePart{} for j := -1; j < ScreenHeight/textureHeight+1; j++ { for i := 0; i < ScreenWidth/textureWidth+1; i++ { parts = append(parts, graphics.TexturePart{ LocationX: i * textureWidth, LocationY: j * textureHeight, Source: graphics.Rect{0, 0, textureWidth, textureHeight}, }) } } dx := (-c/4) % textureWidth dy := (c/4) % textureHeight geo := matrix.IdentityGeometry() geo.Translate(float64(dx), float64(dy)) clr := matrix.IdentityColor() context.DrawTextureParts(backgroundTextureId, parts, geo, clr) } func drawLogo(context graphics.Context, str string) { scale := 4 textWidth := textWidth(str) * scale x := (ScreenWidth - textWidth) / 2 y := 32 drawTextWithShadow(context, str, x, y, scale, color.RGBA{0x00, 0x00, 0x80, 0xff}) }