127 lines
3.5 KiB
Go
127 lines
3.5 KiB
Go
package main
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import (
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"github.com/gen2brain/raylib-go/raylib"
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)
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var (
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maxBuildings int = 100
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)
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func main() {
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screenWidth := int32(800)
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screenHeight := int32(450)
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raylib.InitWindow(screenWidth, screenHeight, "raylib [core] example - 2d camera")
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player := raylib.NewRectangle(400, 280, 40, 40)
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buildings := make([]raylib.Rectangle, maxBuildings)
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buildColors := make([]raylib.Color, maxBuildings)
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spacing := float32(0)
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for i := 0; i < maxBuildings; i++ {
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r := raylib.Rectangle{}
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r.Width = float32(raylib.GetRandomValue(50, 200))
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r.Height = float32(raylib.GetRandomValue(100, 800))
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r.Y = float32(screenHeight) - 130 - r.Height
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r.X = -6000 + spacing
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spacing += r.Width
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c := raylib.NewColor(byte(raylib.GetRandomValue(200, 240)), byte(raylib.GetRandomValue(200, 240)), byte(raylib.GetRandomValue(200, 250)), byte(255))
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buildings[i] = r
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buildColors[i] = c
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}
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camera := raylib.Camera2D{}
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camera.Target = raylib.NewVector2(float32(player.X+20), float32(player.Y+20))
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camera.Offset = raylib.NewVector2(0, 0)
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camera.Rotation = 0.0
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camera.Zoom = 1.0
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raylib.SetTargetFPS(30)
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for !raylib.WindowShouldClose() {
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if raylib.IsKeyDown(raylib.KeyRight) {
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player.X += 2 // Player movement
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camera.Offset.X -= 2 // Camera displacement with player movement
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} else if raylib.IsKeyDown(raylib.KeyLeft) {
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player.X -= 2 // Player movement
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camera.Offset.X += 2 // Camera displacement with player movement
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}
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// Camera target follows player
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camera.Target = raylib.NewVector2(float32(player.X+20), float32(player.Y+20))
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// Camera rotation controls
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if raylib.IsKeyDown(raylib.KeyA) {
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camera.Rotation--
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} else if raylib.IsKeyDown(raylib.KeyS) {
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camera.Rotation++
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}
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// Limit camera rotation to 80 degrees (-40 to 40)
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if camera.Rotation > 40 {
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camera.Rotation = 40
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} else if camera.Rotation < -40 {
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camera.Rotation = -40
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}
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// Camera zoom controls
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camera.Zoom += float32(raylib.GetMouseWheelMove()) * 0.05
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if camera.Zoom > 3.0 {
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camera.Zoom = 3.0
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} else if camera.Zoom < 0.1 {
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camera.Zoom = 0.1
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}
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// Camera reset (zoom and rotation)
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if raylib.IsKeyPressed(raylib.KeyR) {
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camera.Zoom = 1.0
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camera.Rotation = 0.0
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}
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raylib.BeginDrawing()
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raylib.ClearBackground(raylib.RayWhite)
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raylib.BeginMode2D(camera)
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raylib.DrawRectangle(-6000, 320, 13000, 8000, raylib.DarkGray)
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for i := 0; i < maxBuildings; i++ {
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raylib.DrawRectangleRec(buildings[i], buildColors[i])
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}
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raylib.DrawRectangleRec(player, raylib.Red)
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raylib.DrawRectangle(int32(camera.Target.X), -500, 1, screenHeight*4, raylib.Green)
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raylib.DrawRectangle(-500, int32(camera.Target.Y), screenWidth*4, 1, raylib.Green)
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raylib.EndMode2D()
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raylib.DrawText("SCREEN AREA", 640, 10, 20, raylib.Red)
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raylib.DrawRectangle(0, 0, screenWidth, 5, raylib.Red)
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raylib.DrawRectangle(0, 5, 5, screenHeight-10, raylib.Red)
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raylib.DrawRectangle(screenWidth-5, 5, 5, screenHeight-10, raylib.Red)
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raylib.DrawRectangle(0, screenHeight-5, screenWidth, 5, raylib.Red)
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raylib.DrawRectangle(10, 10, 250, 113, raylib.Fade(raylib.SkyBlue, 0.5))
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raylib.DrawRectangleLines(10, 10, 250, 113, raylib.Blue)
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raylib.DrawText("Free 2d camera controls:", 20, 20, 10, raylib.Black)
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raylib.DrawText("- Right/Left to move Offset", 40, 40, 10, raylib.DarkGray)
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raylib.DrawText("- Mouse Wheel to Zoom in-out", 40, 60, 10, raylib.DarkGray)
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raylib.DrawText("- A / S to Rotate", 40, 80, 10, raylib.DarkGray)
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raylib.DrawText("- R to reset Zoom and Rotation", 40, 100, 10, raylib.DarkGray)
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raylib.EndDrawing()
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}
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raylib.CloseWindow()
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}
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