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83 lines
1.9 KiB
Go
83 lines
1.9 KiB
Go
package main
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import (
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"image"
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"image/color"
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"log"
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"os"
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"github.com/disintegration/imaging"
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)
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type Mario struct {
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position image.Point
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dir image.Point
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images map[string]image.Image
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updown string
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}
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// animator is a wrapping function for go routine that can receive an mq channel
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func initialMario() Mario {
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mario := Mario{
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images: initialMap(),
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updown: "marioUp",
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dir: image.Point{1, 1},
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}
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return mario
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}
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func loadMario(file string) image.Image {
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reader, err := os.Open(file)
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if err != nil {
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log.Fatal(err)
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}
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rawMario, _, err := image.Decode(reader)
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if err != nil {
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log.Fatal(err)
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}
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mario := imaging.Resize(rawMario, 16, 16, imaging.Lanczos)
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return mario
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}
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func initialMap() map[string]image.Image {
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imageMap := make(map[string]image.Image)
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imageMap["marioUp"] = loadMario("marioUp.png")
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imageMap["marioDown"] = loadMario("marioDown.png")
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return imageMap
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}
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// initializes the struct for the an play animation function, this could all be dumped into function that's wrapping go routine if I wanted
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// what happens each frame, at an interval of 50 milliseconds
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func (a *Animation) animateMario() {
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defer a.updateMarioPosition()
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a.ctx.SetColor(color.Black)
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a.ctx.Clear()
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if a.dir.X == 1 {
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a.ctx.DrawImageAnchored(a.mario.images[a.mario.updown], a.mario.position.X, a.mario.position.Y, 0.5, 0.5)
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} else {
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a.ctx.DrawImageAnchored(imaging.FlipH(a.mario.images[a.mario.updown]), a.mario.position.X, a.mario.position.Y, 0.5, 0.5)
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}
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}
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// what mario does every frame
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func (a *Animation) updateMarioPosition() {
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a.mario.position.X += 1 * a.mario.dir.X
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a.mario.position.Y += 1 * a.mario.dir.Y
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if a.mario.position.Y+a.height > a.ctx.Height() {
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a.mario.dir.Y = -1
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a.mario.updown = "marioUp"
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} else if a.position.Y-a.height < 0 {
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a.mario.updown = "marioDown"
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a.mario.dir.Y = 1
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}
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if a.mario.position.X+a.width > a.ctx.Width() {
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a.mario.dir.X = -1
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} else if a.mario.position.X-a.width < 0 {
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a.mario.dir.X = 1
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}
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}
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