Add some games

examples/games/floppy/main.go

@@ -0,0 +1,182 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/gen2brain/raylib-go/raylib"
+)
+
+const (
+	maxTubes     = 100
+	floppyRadius = 24.0
+	tubesWidth   = 80
+)
+
+type Floppy struct {
+	Position raylib.Vector2
+	Radius   float32
+	Color    raylib.Color
+}
+
+type Tubes struct {
+	Rec    raylib.Rectangle
+	Color  raylib.Color
+	Active bool
+}
+
+type Game struct {
+	ScreenWidth  int32
+	ScreenHeight int32
+
+	FramesCounter int32
+	GameOver      bool
+	Pause         bool
+	Score         int
+	HiScore       int
+
+	Floppy      Floppy
+	Tubes       []Tubes
+	TubesPos    []raylib.Vector2
+	TubesSpeedX int32
+	SuperFX     bool
+}
+
+func main() {
+	game := Game{}
+	game.Init()
+
+	raylib.InitWindow(game.ScreenWidth, game.ScreenHeight, "sample game: floppy")
+
+	raylib.SetTargetFPS(60)
+
+	for !raylib.WindowShouldClose() {
+		game.Update()
+
+		game.Draw()
+	}
+
+	raylib.CloseWindow()
+}
+
+// Initialize game
+func (g *Game) Init() {
+	g.ScreenWidth = 800
+	g.ScreenHeight = 450
+
+	g.Floppy = Floppy{}
+	g.Floppy.Radius = floppyRadius
+	g.Floppy.Position = raylib.NewVector2(80, float32(g.ScreenHeight)/2-g.Floppy.Radius)
+	g.TubesSpeedX = 2
+
+	g.TubesPos = make([]raylib.Vector2, maxTubes)
+
+	for i := 0; i < maxTubes; i++ {
+		g.TubesPos[i].X = float32(400 + 280*i)
+		g.TubesPos[i].Y = -float32(raylib.GetRandomValue(0, 120))
+	}
+
+	g.Tubes = make([]Tubes, maxTubes*2)
+
+	for i := 0; i < maxTubes*2; i += 2 {
+		g.Tubes[i].Rec.X = int32(g.TubesPos[i/2].X)
+		g.Tubes[i].Rec.Y = int32(g.TubesPos[i/2].Y)
+		g.Tubes[i].Rec.Width = tubesWidth
+		g.Tubes[i].Rec.Height = 255
+
+		g.Tubes[i+1].Rec.X = int32(g.TubesPos[i/2].X)
+		g.Tubes[i+1].Rec.Y = int32(600 + g.TubesPos[i/2].Y - 255)
+		g.Tubes[i+1].Rec.Width = tubesWidth
+		g.Tubes[i+1].Rec.Height = 255
+
+		g.Tubes[i/2].Active = true
+	}
+
+	g.Score = 0
+	g.FramesCounter = 0
+
+	g.GameOver = false
+	g.SuperFX = false
+	g.Pause = false
+}
+
+// Update game
+func (g *Game) Update() {
+	if !g.GameOver {
+		if raylib.IsKeyPressed(raylib.KeyP) {
+			g.Pause = !g.Pause
+		}
+
+		if !g.Pause {
+			for i := 0; i < maxTubes; i++ {
+				g.TubesPos[i].X -= float32(g.TubesSpeedX)
+			}
+
+			for i := 0; i < maxTubes*2; i += 2 {
+				g.Tubes[i].Rec.X = int32(g.TubesPos[i/2].X)
+				g.Tubes[i+1].Rec.X = int32(g.TubesPos[i/2].X)
+			}
+
+			if raylib.IsKeyDown(raylib.KeySpace) && !g.GameOver {
+				g.Floppy.Position.Y -= 3
+			} else {
+				g.Floppy.Position.Y += 1
+			}
+
+			// Check Collisions
+			for i := 0; i < maxTubes*2; i++ {
+				if raylib.CheckCollisionCircleRec(g.Floppy.Position, g.Floppy.Radius, g.Tubes[i].Rec) {
+					g.GameOver = true
+					g.Pause = false
+				} else if (g.TubesPos[i/2].X < g.Floppy.Position.X) && g.Tubes[i/2].Active && !g.GameOver {
+					g.Score += 100
+					g.Tubes[i/2].Active = false
+
+					g.SuperFX = true
+
+					if g.Score > g.HiScore {
+						g.HiScore = g.Score
+					}
+				}
+			}
+		}
+	} else {
+		if raylib.IsKeyPressed(raylib.KeyEnter) {
+			g.Init()
+			g.GameOver = false
+		}
+	}
+}
+
+// Draw game
+func (g *Game) Draw() {
+	raylib.BeginDrawing()
+
+	raylib.ClearBackground(raylib.RayWhite)
+
+	if !g.GameOver {
+		raylib.DrawCircle(int32(g.Floppy.Position.X), int32(g.Floppy.Position.Y), g.Floppy.Radius, raylib.DarkGray)
+
+		// Draw tubes
+		for i := 0; i < maxTubes; i++ {
+			raylib.DrawRectangle(g.Tubes[i*2].Rec.X, g.Tubes[i*2].Rec.Y, g.Tubes[i*2].Rec.Width, g.Tubes[i*2].Rec.Height, raylib.Gray)
+			raylib.DrawRectangle(g.Tubes[i*2+1].Rec.X, g.Tubes[i*2+1].Rec.Y, g.Tubes[i*2+1].Rec.Width, g.Tubes[i*2+1].Rec.Height, raylib.Gray)
+		}
+
+		// Draw flashing fx (one frame only)
+		if g.SuperFX {
+			raylib.DrawRectangle(0, 0, g.ScreenWidth, g.ScreenHeight, raylib.White)
+			g.SuperFX = false
+		}
+
+		raylib.DrawText(fmt.Sprintf("%04d", g.Score), 20, 20, 40, raylib.Gray)
+		raylib.DrawText(fmt.Sprintf("HI-SCORE: %04d", g.HiScore), 20, 70, 20, raylib.LightGray)
+
+		if g.Pause {
+			raylib.DrawText("GAME PAUSED", g.ScreenWidth/2-raylib.MeasureText("GAME PAUSED", 40)/2, g.ScreenHeight/2-40, 40, raylib.Gray)
+		}
+	} else {
+		raylib.DrawText("PRESS [ENTER] TO PLAY AGAIN", raylib.GetScreenWidth()/2-raylib.MeasureText("PRESS [ENTER] TO PLAY AGAIN", 20)/2, raylib.GetScreenHeight()/2-50, 20, raylib.Gray)
+	}
+
+	raylib.EndDrawing()
+}