124 lines
3.4 KiB
Go
124 lines
3.4 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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func main() {
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screenWidth := int32(800)
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screenHeight := int32(450)
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rl.InitWindow(screenWidth, screenHeight, "raylib [shapes] example - raylib logo animation")
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logoPositionX := screenWidth/2 - 128
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logoPositionY := screenHeight/2 - 128
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framesCounter := 0
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lettersCount := int32(0)
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topSideRecWidth := int32(16)
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leftSideRecHeight := int32(16)
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bottomSideRecWidth := int32(16)
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rightSideRecHeight := int32(16)
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state := 0 // Tracking animation states (State Machine)
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alpha := float32(1.0) // Useful for fading
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rl.SetTargetFPS(60)
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for !rl.WindowShouldClose() {
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if state == 0 { // State 0: Small box blinking
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framesCounter++
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if framesCounter == 120 {
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state = 1
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framesCounter = 0 // Reset counter... will be used later...
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}
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} else if state == 1 { // State 1: Top and left bars growing
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topSideRecWidth += 4
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leftSideRecHeight += 4
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if topSideRecWidth == 256 {
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state = 2
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}
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} else if state == 2 { // State 2: Bottom and right bars growing
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bottomSideRecWidth += 4
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rightSideRecHeight += 4
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if bottomSideRecWidth == 256 {
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state = 3
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}
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} else if state == 3 { // State 3: Letters appearing (one by one)
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framesCounter++
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if framesCounter%12 == 0 { // Every 12 frames, one more letter!
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lettersCount++
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framesCounter = 0
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}
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if lettersCount >= 6 { // When all letters have appeared, just fade out everything
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alpha -= 0.02
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if alpha <= 0.0 {
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alpha = 0.0
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state = 4
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}
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}
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} else if state == 4 { // State 4: Reset and Replay
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if rl.IsKeyPressed(rl.KeyR) {
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framesCounter = 0
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lettersCount = 0
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topSideRecWidth = 16
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leftSideRecHeight = 16
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bottomSideRecWidth = 16
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rightSideRecHeight = 16
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alpha = 1.0
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state = 0 // Return to State 0
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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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if state == 0 {
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if (framesCounter/15)%2 == 0 {
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rl.DrawRectangle(logoPositionX, logoPositionY, 16, 16, rl.Black)
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}
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} else if state == 1 {
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rl.DrawRectangle(logoPositionX, logoPositionY, topSideRecWidth, 16, rl.Black)
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rl.DrawRectangle(logoPositionX, logoPositionY, 16, leftSideRecHeight, rl.Black)
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} else if state == 2 {
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rl.DrawRectangle(logoPositionX, logoPositionY, topSideRecWidth, 16, rl.Black)
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rl.DrawRectangle(logoPositionX, logoPositionY, 16, leftSideRecHeight, rl.Black)
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rl.DrawRectangle(logoPositionX+240, logoPositionY, 16, rightSideRecHeight, rl.Black)
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rl.DrawRectangle(logoPositionX, logoPositionY+240, bottomSideRecWidth, 16, rl.Black)
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} else if state == 3 {
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rl.DrawRectangle(logoPositionX, logoPositionY, topSideRecWidth, 16, rl.Fade(rl.Black, alpha))
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rl.DrawRectangle(logoPositionX, logoPositionY+16, 16, leftSideRecHeight-32, rl.Fade(rl.Black, alpha))
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rl.DrawRectangle(logoPositionX+240, logoPositionY+16, 16, rightSideRecHeight-32, rl.Fade(rl.Black, alpha))
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rl.DrawRectangle(logoPositionX, logoPositionY+240, bottomSideRecWidth, 16, rl.Fade(rl.Black, alpha))
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rl.DrawRectangle(screenWidth/2-112, screenHeight/2-112, 224, 224, rl.Fade(rl.RayWhite, alpha))
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text := "raylib"
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length := int32(len(text))
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if lettersCount > length {
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lettersCount = length
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}
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rl.DrawText(text[0:lettersCount], screenWidth/2-44, screenHeight/2+48, 50, rl.Fade(rl.Black, alpha))
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} else if state == 4 {
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rl.DrawText("[R] REPLAY", 340, 200, 20, rl.Gray)
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}
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rl.EndDrawing()
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}
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rl.CloseWindow()
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}
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