diff options
| -rw-r--r-- | go.mod | 3 | ||||
| -rw-r--r-- | pengui.go | 112 |
2 files changed, 91 insertions, 24 deletions
@@ -2,9 +2,10 @@ module pengui go 1.18 +require github.com/hajimehoshi/ebiten/v2 v2.6.2 + require ( github.com/ebitengine/purego v0.5.0 // indirect - github.com/hajimehoshi/ebiten/v2 v2.6.2 // indirect github.com/jezek/xgb v1.1.0 // indirect golang.org/x/exp/shiny v0.0.0-20230817173708-d852ddb80c63 // indirect golang.org/x/image v0.12.0 // indirect @@ -1,12 +1,14 @@ package main import ( + "image/color" _ "image/png" - "image/color" "log" + "math" "github.com/hajimehoshi/ebiten/v2" "github.com/hajimehoshi/ebiten/v2/ebitenutil" + "github.com/hajimehoshi/ebiten/v2/vector" ) const screen_w, screen_h = 640, 480 @@ -18,13 +20,10 @@ type Penguin struct { xv, yv float64 } -var penguin Penguin - -func init() { - penguin = Penguin{ - img: nil, +func newPenguin() Penguin { + penguin := Penguin{ x: screen_w / 2, - y: screen_h / 2, + y: 0, xv: 0, yv: 0, } @@ -34,47 +33,106 @@ func init() { if err != nil { log.Fatal(err) } -} -type Game struct{} + return penguin; +} -func drawPenguin(screen *ebiten.Image, penguin Penguin) { +func (penguin *Penguin) draw(screen *ebiten.Image) { op := &ebiten.DrawImageOptions{} op.GeoM.Translate(penguin.x, penguin.y) screen.DrawImage(penguin.img, op) } -func updatePenguin(penguin *Penguin) { - penguin.x = penguin.x + penguin.xv - penguin.y = penguin.y + penguin.yv +func (penguin *Penguin) drawBounds(screen *ebiten.Image) { + vector.StrokeRect(screen, + float32(penguin.x), float32(penguin.y), + float32(penguin.img.Bounds().Dx()), float32(penguin.img.Bounds().Dy()), + 4, color.RGBA{0xcc, 0x66, 0x66, 0xff}, true) +} + +func (penguin *Penguin) update(g *Game) { + if penguin.collideWithCurve(g.ground, penguin.xv, 0){ + penguin.xv = 0 + penguin.yv -= 4 + } else { + penguin.x += penguin.xv + penguin.xv *= 0.9 + } + + if penguin.collideWithCurve(g.ground, 0, penguin.yv){ + penguin.yv = 0 + } else { + penguin.y += penguin.yv + penguin.yv += 0.9 + } +} + +func (p *Penguin) collideWithCurve(curve Curve, xv, yv float64) bool { + cy1 := curve(p.x + xv) + y1 := p.y + yv + y2 := p.y + yv + float64(p.img.Bounds().Dy()) + + if y1 < cy1 && cy1 < y2 { + return true + } + + cy2 := curve(p.x + xv + float64(p.img.Bounds().Dx())) + if y1 < cy2 && cy2 < y2 { + return true + } + + return false +} - penguin.xv = penguin.xv / 2 - penguin.yv = penguin.yv / 2 +func (g *Game) init() { + g.penguin = newPenguin() +} + +type Curve func(x float64)(y float64) + +func (curve Curve) draw(dst *ebiten.Image, clr color.Color, width float32, resolution int, antialias bool) { + for x1 := 0; x1 < screen_w; x1 += resolution { + x2 := x1 + resolution + y1 := curve(float64(x1)) + y2 := curve(float64(x2)) + + vector.StrokeLine(dst, float32(x1), float32(y1), float32(x2), float32(y2), width, color.RGBA{0x19, 0x19, 0x19, 0xff}, true) + } +} + +type Game struct{ + penguin Penguin + ground Curve } func (g *Game) Update() error { if ebiten.IsKeyPressed(ebiten.KeyArrowRight) { - penguin.xv = 4 + g.penguin.xv = 4 } + if ebiten.IsKeyPressed(ebiten.KeyArrowLeft) { - penguin.xv = -4 + g.penguin.xv = -4 } + if ebiten.IsKeyPressed(ebiten.KeyArrowUp) { - penguin.yv = -4 + g.penguin.yv = -4 } + if ebiten.IsKeyPressed(ebiten.KeyArrowDown) { - penguin.yv = 4 + g.penguin.yv = 4 } - updatePenguin(&penguin) - + g.penguin.update(g) + return nil } func (g *Game) Draw(screen *ebiten.Image) { screen.Fill(color.RGBA{0xfe, 0xfe, 0xfe, 0xff}) - drawPenguin(screen, penguin) + g.ground.draw(screen, color.RGBA{0x19, 0x19, 0x19, 0xff}, 4, 16, true); + g.penguin.draw(screen) + g.penguin.drawBounds(screen) } func (g *Game) Layout(outsideWidth, outsideHeight int) (screenWidth, screenHeight int) { @@ -84,7 +142,15 @@ func (g *Game) Layout(outsideWidth, outsideHeight int) (screenWidth, screenHeigh func main() { ebiten.SetWindowSize(640, 480) ebiten.SetWindowTitle("penguin") - if err := ebiten.RunGame(&Game{}); err != nil { + + game := Game{} + + game.ground = func(x float64)(y float64) { + return 200-math.Pow((x - 320)/320, 3)+math.Pow((x-320), 2)/300 + } + + game.init() + if err := ebiten.RunGame(&game); err != nil { log.Fatal(err) } } |