55 lines
1.0 KiB
Go
55 lines
1.0 KiB
Go
package terrain
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import (
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"bytes"
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"github.com/hajimehoshi/ebiten/v2"
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"gitlab.com/kbr4/9heroja/resources"
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"image"
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"log"
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)
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var (
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grassImage *ebiten.Image
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)
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type Terrain struct {
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positionX float64
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positionY float64
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}
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func (t *Terrain) DrawTerrain(screen *ebiten.Image) {
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screenWidth := screen.Bounds().Max.X
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screenHeight := screen.Bounds().Max.Y
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offsetX := int(t.positionX) % 64
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offsetY := int(t.positionY) % 64
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op := &ebiten.DrawImageOptions{}
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for i := -1; i <= screenWidth/64+1; i++ {
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for j := -1; j <= screenHeight/64+1; j++ {
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// ground
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op.GeoM.Reset()
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op.GeoM.Translate(float64(i*64+offsetX), float64(j*64+offsetY))
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screen.DrawImage(grassImage.SubImage(image.Rect(32, 160, 32+64, 160+64)).(*ebiten.Image), op)
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}
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}
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}
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func init() {
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img, _, err := image.Decode(bytes.NewReader(resources.Grass_png))
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if err != nil {
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log.Fatal(err)
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}
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grassImage = ebiten.NewImageFromImage(img)
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}
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func NewTerrain() *Terrain {
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return &Terrain{
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positionX: 0,
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positionY: 0,
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}
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}
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func (t *Terrain) GoDown() {
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t.positionY += 1
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}
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