raylib-go/examples/textures/background_scrolling/main.go
2023-10-20 22:01:45 +02:00

67 lines
1.7 KiB
Go

package main
import (
rl "github.com/gen2brain/raylib-go/raylib"
)
var (
screenW = int32(1280)
screenH = int32(500)
)
func main() {
rl.InitWindow(screenW, screenH, "raylib [textures] example - background scrolling")
background := rl.LoadTexture("cyberpunk_street_background.png")
midground := rl.LoadTexture("cyberpunk_street_midground.png")
foreground := rl.LoadTexture("cyberpunk_street_foreground.png")
scrollBack := float32(0)
scrollMid := float32(0)
scrollFore := float32(0)
rl.SetTargetFPS(60)
for !rl.WindowShouldClose() {
scrollBack -= 0.1
scrollMid -= 0.5
scrollFore -= 1
if scrollBack <= -float32(background.Width)*2 {
scrollBack = 0
}
if scrollMid <= -float32(midground.Width)*2 {
scrollMid = 0
}
if scrollFore <= -float32(foreground.Width)*2 {
scrollFore = 0
}
rl.BeginDrawing()
rl.ClearBackground(rl.RayWhite)
rl.DrawTextureEx(background, rl.NewVector2(scrollBack, 20), 0, 2, rl.White)
rl.DrawTextureEx(background, rl.NewVector2(float32(background.Width*2)+scrollBack, 20), 0, 2, rl.White)
rl.DrawTextureEx(midground, rl.NewVector2(scrollMid, 20), 0, 2, rl.White)
rl.DrawTextureEx(midground, rl.NewVector2(float32(midground.Width*2)+scrollMid, 20), 0, 2, rl.White)
rl.DrawTextureEx(foreground, rl.NewVector2(scrollFore, 20), 0, 2, rl.White)
rl.DrawTextureEx(foreground, rl.NewVector2(float32(foreground.Width*2)+scrollFore, 20), 0, 2, rl.White)
txt := "BACKGROUND SCROLLING & PARALLAX"
txtlen := rl.MeasureText(txt, 20)
rl.DrawText(txt, (screenW/2)-txtlen/2, screenH-50, 20, rl.Black)
txt = "(c) Cyberpunk Street Environment by Luis Zuno (@ansimuz)"
txtlen = rl.MeasureText(txt, 10)
rl.DrawText(txt, (screenW/2)-txtlen/2, screenH-25, 10, rl.Black)
rl.EndDrawing()
}
rl.CloseWindow()
}