Add Bunnymark example

examples/others/bunnymark/main.go

@@ -0,0 +1,80 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/gen2brain/raylib-go/raylib"
+)
+
+type Bunny struct {
+	Position raylib.Vector2
+	Speed    raylib.Vector2
+	Color    raylib.Color
+}
+
+func main() {
+	screenWidth := int32(1280)
+	screenHeight := int32(960)
+
+	raylib.InitWindow(screenWidth, screenHeight, "raylib [core] example - Bunnymark")
+
+	texture := raylib.LoadTexture("wabbit_alpha.png")
+
+	bunnies := make([]*Bunny, 0)
+	bunniesCount := 0
+
+	raylib.SetTargetFPS(60)
+
+	for !raylib.WindowShouldClose() {
+
+		if raylib.IsMouseButtonDown(raylib.MouseLeftButton) {
+			// Create more bunnies
+			for i := 0; i < 100; i++ {
+				b := &Bunny{}
+				b.Position = raylib.GetMousePosition()
+				b.Speed.X = float32(raylib.GetRandomValue(250, 500)) / 60.0
+				b.Speed.Y = float32(raylib.GetRandomValue(250, 500)-500) / 60.0
+
+				bunnies = append(bunnies, b)
+				bunniesCount++
+			}
+		}
+
+		// Update bunnies
+		for _, b := range bunnies {
+			b.Position.X += b.Speed.X
+			b.Position.Y += b.Speed.Y
+
+			if (b.Position.X > float32(screenWidth)) || (b.Position.X < 0) {
+				b.Speed.X *= -1
+			}
+
+			if (b.Position.Y > float32(screenHeight)) || (b.Position.Y < 0) {
+				b.Speed.Y *= -1
+			}
+		}
+
+		raylib.BeginDrawing()
+
+		raylib.ClearBackground(raylib.RayWhite)
+
+		for _, b := range bunnies {
+			// NOTE: When internal QUADS batch limit is reached, a draw call is launched and
+			// batching buffer starts being filled again; before launching the draw call,
+			// updated vertex data from internal buffer is send to GPU... it seems it generates
+			// a stall and consequently a frame drop, limiting number of bunnies drawn at 60 fps
+			raylib.DrawTexture(texture, int32(b.Position.X), int32(b.Position.Y), raylib.RayWhite)
+		}
+
+		raylib.DrawRectangle(0, 0, screenWidth, 40, raylib.LightGray)
+		raylib.DrawText("raylib bunnymark", 10, 10, 20, raylib.DarkGray)
+		raylib.DrawText(fmt.Sprintf("bunnies: %d", bunniesCount), 400, 10, 20, raylib.Red)
+
+		raylib.DrawFPS(260, 10)
+
+		raylib.EndDrawing()
+	}
+
+	raylib.UnloadTexture(texture)
+	raylib.CloseWindow()
+}