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Updated Your first game in Ebiten! (markdown)

Hajime Hoshi 2016-10-25 22:13:05 +09:00
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Your-first-game-in-Ebiten!.md

@ -1,6 +1,6 @@
# What is Ebiten? # What is Ebiten?
[Ebiten (海老天)](https://github.com/hajimehoshi/ebiten) is a 8-bit game library written in Golang, and you might wondering what is "海老天", Hmm.. it's actually shrimp of Tempura (≒ fried shrimp) in Japanese 🍤. [Ebiten (海老天)](https://github.com/hajimehoshi/ebiten) is a 8-bit game library written in Go, and you might be wondering what is "海老天", Hmm.. it's actually shrimp of Tempura (≒ fried shrimp) in Japanese 🍤.
![](http://i.imgur.com/NPbjFJp.png) ![](http://i.imgur.com/NPbjFJp.png)
@ -8,13 +8,13 @@ And Ebiten is a cross-platform library, which means you can run Ebiten on these
* Desktop: Windows, Mac OS X, Linux * Desktop: Windows, Mac OS X, Linux
* Mobile: Android, iOS * Mobile: Android, iOS
* Web browser: Chrome and Firefox (GopherJS) * Web browser: Chrome and Firefox (powered by GopherJS)
There're already [some examples available on the website](https://hajimehoshi.github.io/ebiten/#examples), and you can also found the [documentation of Ebiten by clicking here](https://godoc.org/github.com/hajimehoshi/ebiten). There're already [some examples available on the website](https://hajimehoshi.github.io/ebiten/#examples), and you can also found the [documentation of Ebiten by clicking here](https://godoc.org/github.com/hajimehoshi/ebiten).
# Get Ebiten package # Get Ebiten package
Before we started, you would need to `go get` the Ebiten package: Before we get started, you would need to `go get` the Ebiten package:
```bash ```bash
:; go get github.com/hajimehoshi/ebiten :; go get github.com/hajimehoshi/ebiten
@ -39,11 +39,11 @@ import (
## Screen update and display ## Screen update and display
Anything in the game is **always being updating** (or refreshing), sometimes you can heard people talked about FPS, it means **frames per second**, we would have to **clean the previous screen** and **refresh the screen** each time **we move an element**, so **the element won't leave a long track** on the screen like a snake 🐍. Anything in the game is **always being updating** (or refreshing). Sometimes you can hear people talking about FPS, which means **frames per second**. We would have to **clean the previous screen** and **refresh the screen** each time **we move an element**, so **the element won't leave a long track** on the screen like a snake 🐍.
If we want to display a text on the screen, **it will be disappeared before we see it**, Why? Because we didn't **keep it on the screen** to do this, we'll need to call a `update()` function **per frame**, then put our code inside of the function, so the text will keep on the screen. If we want to display a text on the screen, **it will be disappeared before we see it**. Why? Because we don't **keep it on the screen** to do this, we'll need to call a `update()` function **per frame**, then put our code inside of the function, so the text will keep on the screen.
To display a text, we can use `ebitenutil.DebugPrint(image, text)`, which is a function for **displaying a debug information**, but we can use it to display a text also. To display a text, we can use `ebitenutil.DebugPrint(image, text)`, which is a function for **displaying a debug information**, but we can also use it to display a text.
```go ```go
func update(screen *ebiten.Image) error { func update(screen *ebiten.Image) error {
@ -59,7 +59,7 @@ But hey! It's not done yet, because **you'll need to tell Ebiten to run your `up
## Initialize Ebiten ## Initialize Ebiten
It's time to configure Ebiten through `ebiten.Run(update, width, height, scale, title)`. This tells **what function to loop**, what title should our game be, and the size of the window. It's time to configure Ebiten through `ebiten.Run(update, width, height, scale, title)`. This tells **which function to loop**, what title of our game is, and the size of the window.
* `update` is the parameter that you would need to pass a function which will **always be called at the each of the frame**, and yes! **We will pass our `update()` function though here**. * `update` is the parameter that you would need to pass a function which will **always be called at the each of the frame**, and yes! **We will pass our `update()` function though here**.
* `width` and `height` are the **width** and the **height** of the game window. * `width` and `height` are the **width** and the **height** of the game window.