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