mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-25 03:08:54 +01:00
docs: Add examples/airship
This commit is contained in:
Hajime Hoshi
parent
1ff3a0268e
commit
568b3184b0
@ -191,6 +191,7 @@ var (
|
||||
{Name: "blocks", ThumbWidth: 256, ThumbHeight: 240},
|
||||
}
|
||||
graphicsExamples = []example{
|
||||
{Name: "airship", ThumbWidth: 320, ThumbHeight: 240},
|
||||
{Name: "alphablending", ThumbWidth: 320, ThumbHeight: 240},
|
||||
{Name: "filter", ThumbWidth: 320, ThumbHeight: 240},
|
||||
{Name: "flood", ThumbWidth: 320, ThumbHeight: 240},
|
||||
|
||||
31
docs/examples/airship.content.html
Normal file
31
docs/examples/airship.content.html
Normal file
@ -0,0 +1,31 @@
|
||||
<!DOCTYPE html>
|
||||
<meta charset="utf-8">
|
||||
<script>
|
||||
'use strict';
|
||||
window.addEventListener('load', function() {
|
||||
function isProduction() {
|
||||
var l = window.top.location;
|
||||
if (l.hash === '#_production') {
|
||||
return true;
|
||||
}
|
||||
if (l.hostname === 'localhost' || l.hostname === '127.0.0.1') {
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
var s = document.createElement('script');
|
||||
var src = 'airship.js';
|
||||
if (isProduction()) {
|
||||
src = 'https://hajimehoshi.github.io/ebiten.pagestorage/latest/' + src;
|
||||
}
|
||||
s.src = src;
|
||||
s.onload = function() {
|
||||
var notice = document.getElementById('notice');
|
||||
notice.parentNode.removeChild(notice);
|
||||
};
|
||||
document.body.appendChild(s);
|
||||
});
|
||||
</script>
|
||||
<title>(Example)</title>
|
||||
<p id="notice" style="color: white;">Now Loading...</p>
|
||||
285
docs/examples/airship.html
Normal file
285
docs/examples/airship.html
Normal file
@ -0,0 +1,285 @@
|
||||
<!DOCTYPE html>
|
||||
<meta charset="utf-8">
|
||||
<meta property="og:image" itemprop="image primaryImageOfPage" content="https://hajimehoshi.github.io/ebiten/images/examples/airship.png">
|
||||
<meta name="description" content="Ebiten example - airship">
|
||||
<link rel="shortcut icon" href="../favicon.png" type="image/png" >
|
||||
<link rel="icon" href="../favicon.png" type="image/png" >
|
||||
<title>Ebiten example - airship</title>
|
||||
|
||||
<link rel="stylesheet" href="../stylesheets/bootstrap.min.css">
|
||||
<link rel="stylesheet" href="../stylesheets/highlight-github.css">
|
||||
<link rel="stylesheet" href="../stylesheets/ebiten.css">
|
||||
<script src="../scripts/googleanalytics.js"></script>
|
||||
|
||||
<nav class="navbar"><div class="container">
|
||||
<nav class="d-flex flex-row" style="width: 100%;">
|
||||
<div class="nav mr-auto"><a class="navbar-brand" href="../"><img src="../images/logo_white.svg" alt="EBITEN"></a></div>
|
||||
<ul class="nav">
|
||||
<li class="nav-item"><a class="nav-link" href="https://github.com/hajimehoshi/ebiten">GitHub</a></li>
|
||||
<li class="nav-item"><a class="nav-link" href="https://godoc.org/github.com/hajimehoshi/ebiten">GoDoc</a></li>
|
||||
<li class="nav-item"><a class="nav-link" href="https://github.com/hajimehoshi/ebiten/wiki">Wiki</a>
|
||||
<li class="nav-item"><a class="nav-link" href="https://ebiten-playground.github.io/">Playground</a>
|
||||
</ul>
|
||||
</nav>
|
||||
</div></nav>
|
||||
|
||||
<main><div class="container">
|
||||
|
||||
<h2>Ebiten example - airship</h2>
|
||||
<iframe src="airship.content.html" width="640" height="480"></iframe>
|
||||
<div class="card"><pre class="card-body"><code class="language-go">// +build example
|
||||
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"image"
|
||||
"image/color"
|
||||
_ "image/jpeg"
|
||||
"log"
|
||||
"math"
|
||||
|
||||
"github.com/hajimehoshi/ebiten"
|
||||
"github.com/hajimehoshi/ebiten/ebitenutil"
|
||||
)
|
||||
|
||||
const (
|
||||
screenWidth = 320
|
||||
screenHeight = 240
|
||||
maxAngle = 256
|
||||
maxLean = 16
|
||||
)
|
||||
|
||||
var (
|
||||
skyColor = color.RGBA{0x66, 0xcc, 0xff, 0xff}
|
||||
thePlayer = &player{
|
||||
x16: 16 * 100,
|
||||
y16: 16 * 200,
|
||||
angle: maxAngle * 3 / 4,
|
||||
}
|
||||
gophersImage *ebiten.Image
|
||||
repeatedGophersImage *ebiten.Image
|
||||
groundImage *ebiten.Image
|
||||
perspectiveGroundImage *ebiten.Image
|
||||
fogImage *ebiten.Image
|
||||
)
|
||||
|
||||
func init() {
|
||||
var err error
|
||||
gophersImage, _, err = ebitenutil.NewImageFromFile("_resources/images/gophers.jpg", ebiten.FilterDefault)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
groundImage, _ = ebiten.NewImage(screenWidth*2, screenHeight*2/3+50, ebiten.FilterDefault)
|
||||
perspectiveGroundImage, _ = ebiten.NewImage(screenWidth*2, screenHeight, ebiten.FilterDefault)
|
||||
|
||||
const repeat = 5
|
||||
w, h := gophersImage.Size()
|
||||
repeatedGophersImage, _ = ebiten.NewImage(w*repeat, h*repeat, ebiten.FilterDefault)
|
||||
for j := 0; j < repeat; j++ {
|
||||
for i := 0; i < repeat; i++ {
|
||||
op := &ebiten.DrawImageOptions{}
|
||||
op.GeoM.Translate(float64(w*i), float64(h*j))
|
||||
repeatedGophersImage.DrawImage(gophersImage, op)
|
||||
}
|
||||
}
|
||||
|
||||
const fogHeight = 8
|
||||
w, _ = perspectiveGroundImage.Size()
|
||||
fogRGBA := image.NewRGBA(image.Rect(0, 0, w, fogHeight))
|
||||
for j := 0; j < fogHeight; j++ {
|
||||
a := uint32(float64(fogHeight-1-j) * 0xff / (fogHeight - 1))
|
||||
clr := skyColor
|
||||
r, g, b, oa := uint32(clr.R), uint32(clr.G), uint32(clr.B), uint32(clr.A)
|
||||
clr.R = uint8(r * a / oa)
|
||||
clr.G = uint8(g * a / oa)
|
||||
clr.B = uint8(b * a / oa)
|
||||
clr.A = uint8(a)
|
||||
for i := 0; i < w; i++ {
|
||||
fogRGBA.SetRGBA(i, j, clr)
|
||||
}
|
||||
}
|
||||
fogImage, _ = ebiten.NewImageFromImage(fogRGBA, ebiten.FilterDefault)
|
||||
}
|
||||
|
||||
// player represents the current airship's position.
|
||||
type player struct {
|
||||
// x16, y16 represents the position in XY plane in fixed float format.
|
||||
// The fractional part has 16 bits of precision.
|
||||
x16 int
|
||||
y16 int
|
||||
|
||||
// angle represents the player's angle in XY plane.
|
||||
// angle takes an integer value in [0, maxAngle).
|
||||
angle int
|
||||
|
||||
// lean represents the player's leaning.
|
||||
// lean takes an integer value in [-maxLean, maxLean].
|
||||
lean int
|
||||
}
|
||||
|
||||
func round(x float64) float64 {
|
||||
return math.Floor(x + 0.5)
|
||||
}
|
||||
|
||||
// MoveForward moves the player p forward.
|
||||
func (p *player) MoveForward() {
|
||||
w, h := gophersImage.Size()
|
||||
mx := w * 16
|
||||
my := h * 16
|
||||
s, c := math.Sincos(float64(p.angle) * 2 * math.Pi / maxAngle)
|
||||
p.x16 += int(round(16*c) * 2)
|
||||
p.y16 += int(round(16*s) * 2)
|
||||
for mx <= p.x16 {
|
||||
p.x16 -= mx
|
||||
}
|
||||
for my <= p.y16 {
|
||||
p.y16 -= my
|
||||
}
|
||||
for p.x16 < 0 {
|
||||
p.x16 += mx
|
||||
}
|
||||
for p.y16 < 0 {
|
||||
p.y16 += my
|
||||
}
|
||||
}
|
||||
|
||||
// RotateRight rotates the player p in the right direction.
|
||||
func (p *player) RotateRight() {
|
||||
p.angle++
|
||||
if maxAngle <= p.angle {
|
||||
p.angle -= maxAngle
|
||||
}
|
||||
p.lean++
|
||||
if maxLean < p.lean {
|
||||
p.lean = maxLean
|
||||
}
|
||||
}
|
||||
|
||||
// RotateLeft rotates the player p in the left direction.
|
||||
func (p *player) RotateLeft() {
|
||||
p.angle--
|
||||
if p.angle < 0 {
|
||||
p.angle += maxAngle
|
||||
}
|
||||
p.lean--
|
||||
if p.lean < -maxLean {
|
||||
p.lean = -maxLean
|
||||
}
|
||||
}
|
||||
|
||||
// Stabilize tries to move the player in the stable position (lean).
|
||||
func (p *player) Stabilize() {
|
||||
if 0 < p.lean {
|
||||
p.lean--
|
||||
}
|
||||
if p.lean < 0 {
|
||||
p.lean++
|
||||
}
|
||||
}
|
||||
|
||||
// Position returns the player p's position.
|
||||
func (p *player) Position() (int, int) {
|
||||
return p.x16, p.y16
|
||||
}
|
||||
|
||||
// Angle returns the player p's angle.
|
||||
func (p *player) Angle() int {
|
||||
return p.angle
|
||||
}
|
||||
|
||||
// updateGroundImage updates the ground image according to the current player's position.
|
||||
func updateGroundImage(ground *ebiten.Image) {
|
||||
ground.Clear()
|
||||
|
||||
x16, y16 := thePlayer.Position()
|
||||
a := thePlayer.Angle()
|
||||
gw, gh := ground.Size()
|
||||
w, h := gophersImage.Size()
|
||||
op := &ebiten.DrawImageOptions{}
|
||||
op.GeoM.Translate(float64(-x16)/16, float64(-y16)/16)
|
||||
op.GeoM.Translate(float64(-w*2), float64(-h*2))
|
||||
op.GeoM.Rotate(float64(-a)*2*math.Pi/maxAngle + math.Pi*3.0/2.0)
|
||||
op.GeoM.Translate(float64(gw)/2, float64(gh)-32)
|
||||
ground.DrawImage(repeatedGophersImage, op)
|
||||
}
|
||||
|
||||
// drawGroundImage draws the ground image to the given screen image.
|
||||
func drawGroundImage(screen *ebiten.Image, ground *ebiten.Image) {
|
||||
perspectiveGroundImage.Clear()
|
||||
gw, _ := ground.Size()
|
||||
pw, ph := perspectiveGroundImage.Size()
|
||||
for j := 0; j < ph; j++ {
|
||||
// z is in [1.5, 0.01]
|
||||
rate := float64(j) / float64(ph)
|
||||
z := (1-rate)*1.5 + rate*0.01
|
||||
op := &ebiten.DrawImageOptions{}
|
||||
op.GeoM.Translate(-float64(pw)/2, 0)
|
||||
op.GeoM.Scale(1/z, 4) // 4 is an arbitrary number not to make empty lines.
|
||||
op.GeoM.Translate(float64(pw)/2, float64(j)/z)
|
||||
|
||||
src := image.Rect(0, j, gw, j+1)
|
||||
op.SourceRect = &src
|
||||
perspectiveGroundImage.DrawImage(ground, op)
|
||||
}
|
||||
|
||||
perspectiveGroundImage.DrawImage(fogImage, nil)
|
||||
|
||||
op := &ebiten.DrawImageOptions{}
|
||||
op.GeoM.Translate(-float64(pw)/2, 0)
|
||||
op.GeoM.Rotate(-1 * float64(thePlayer.lean) / maxLean * math.Pi / 8)
|
||||
op.GeoM.Translate(float64(screenWidth)/2, screenHeight/3)
|
||||
screen.DrawImage(perspectiveGroundImage, op)
|
||||
}
|
||||
|
||||
func update(screen *ebiten.Image) error {
|
||||
// Manipulate the player by the input.
|
||||
if ebiten.IsKeyPressed(ebiten.KeySpace) {
|
||||
thePlayer.MoveForward()
|
||||
}
|
||||
rotated := false
|
||||
if ebiten.IsKeyPressed(ebiten.KeyRight) {
|
||||
thePlayer.RotateRight()
|
||||
rotated = true
|
||||
}
|
||||
if ebiten.IsKeyPressed(ebiten.KeyLeft) {
|
||||
thePlayer.RotateLeft()
|
||||
rotated = true
|
||||
}
|
||||
if !rotated {
|
||||
thePlayer.Stabilize()
|
||||
}
|
||||
|
||||
if ebiten.IsRunningSlowly() {
|
||||
return nil
|
||||
}
|
||||
|
||||
// Draw the ground image.
|
||||
screen.Fill(skyColor)
|
||||
updateGroundImage(groundImage)
|
||||
drawGroundImage(screen, groundImage)
|
||||
|
||||
// Draw the message.
|
||||
tutrial := "Space: Move forward\nLeft/Right: Rotate"
|
||||
msg := fmt.Sprintf("FPS: %0.2f\n%s", ebiten.CurrentFPS(), tutrial)
|
||||
ebitenutil.DebugPrint(screen, msg)
|
||||
return nil
|
||||
}
|
||||
|
||||
func main() {
|
||||
if err := ebiten.Run(update, screenWidth, screenHeight, 2, "Air Ship (Ebiten Demo)"); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
}
|
||||
</code></pre></div>
|
||||
|
||||
</div></main>
|
||||
|
||||
<footer><div class="container">
|
||||
<p>© 2013 Hajime Hoshi</p>
|
||||
<p>Code is licensed under <a href="https://github.com/hajimehoshi/ebiten/blob/master/LICENSE">the Apache License 2.0</a>.</p>
|
||||
<p>The content of this page is licensed under <a href="https://creativecommons.org/licenses/by/4.0/">the Creative Commons Attribution 4.0 License</a>.</p>
|
||||
</div></footer>
|
||||
|
||||
<script src="../scripts/highlight.pack.js"></script>
|
||||
<script>hljs.initHighlightingOnLoad();</script>
|
||||
@ -39,6 +39,7 @@ import (
|
||||
|
||||
"github.com/hajimehoshi/ebiten"
|
||||
"github.com/hajimehoshi/ebiten/ebitenutil"
|
||||
"github.com/hajimehoshi/ebiten/inpututil"
|
||||
)
|
||||
|
||||
const (
|
||||
@ -62,6 +63,14 @@ func update(screen *ebiten.Image) error {
|
||||
if ebiten.IsGamepadButtonPressed(id, b) {
|
||||
pressedButtons[id] = append(pressedButtons[id], strconv.Itoa(int(b)))
|
||||
}
|
||||
|
||||
// Log some events.
|
||||
if inpututil.IsGamepadButtonJustPressed(id, b) {
|
||||
log.Printf("Button Just Pressed: id(%d), button(%d)", id, b)
|
||||
}
|
||||
if inpututil.IsGamepadButtonJustReleased(id, b) {
|
||||
log.Printf("Button Just Released: id(%d), button(%d)", id, b)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
BIN
docs/images/examples/airship.png
Normal file
BIN
docs/images/examples/airship.png
Normal file
Binary file not shown.
|
After Width: | Height: | Size: 54 KiB |
@ -36,7 +36,7 @@
|
||||
</div></header>
|
||||
|
||||
<main><div class="container">
|
||||
<p>Stable version: v1.6.0 / Development version: v1.7.0-alpha</p>
|
||||
<p>Stable version: v1.6.1 / Development version: v1.7.0-alpha</p>
|
||||
|
||||
<h2 id="platforms">Platforms</h2>
|
||||
<dl class="row">
|
||||
@ -71,6 +71,8 @@
|
||||
<h3>Graphics</h3>
|
||||
<div class="row">
|
||||
<div class="col-3">
|
||||
<a href="examples/airship.html"><img src="images/examples/airship.png" width="320" height="240" alt="Ebiten example: airship" class="img-thumbnail"></a>
|
||||
</div><div class="col-3">
|
||||
<a href="examples/alphablending.html"><img src="images/examples/alphablending.png" width="320" height="240" alt="Ebiten example: alphablending" class="img-thumbnail"></a>
|
||||
</div><div class="col-3">
|
||||
<a href="examples/filter.html"><img src="images/examples/filter.png" width="320" height="240" alt="Ebiten example: filter" class="img-thumbnail"></a>
|
||||
|
||||
Loading…
Reference in New Issue
Block a user