Initial commit

examples/shapes/logo_raylib_anim/main.go

@@ -0,0 +1,124 @@
+package main
+
+import (
+	"github.com/gen2brain/raylib-go/raylib"
+)
+
+func main() {
+	screenWidth := int32(800)
+	screenHeight := int32(450)
+
+	raylib.InitWindow(screenWidth, screenHeight, "raylib [shapes] example - raylib logo animation")
+
+	logoPositionX := screenWidth/2 - 128
+	logoPositionY := screenHeight/2 - 128
+
+	framesCounter := 0
+	lettersCount := int32(0)
+
+	topSideRecWidth := int32(16)
+	leftSideRecHeight := int32(16)
+
+	bottomSideRecWidth := int32(16)
+	rightSideRecHeight := int32(16)
+
+	state := 0            // Tracking animation states (State Machine)
+	alpha := float32(1.0) // Useful for fading
+
+	raylib.SetTargetFPS(60)
+
+	for !raylib.WindowShouldClose() {
+		if state == 0 { // State 0: Small box blinking
+			framesCounter++
+
+			if framesCounter == 120 {
+				state = 1
+				framesCounter = 0 // Reset counter... will be used later...
+			}
+		} else if state == 1 { // State 1: Top and left bars growing
+			topSideRecWidth += 4
+			leftSideRecHeight += 4
+
+			if topSideRecWidth == 256 {
+				state = 2
+			}
+		} else if state == 2 { // State 2: Bottom and right bars growing
+			bottomSideRecWidth += 4
+			rightSideRecHeight += 4
+
+			if bottomSideRecWidth == 256 {
+				state = 3
+			}
+		} else if state == 3 { // State 3: Letters appearing (one by one)
+			framesCounter++
+
+			if framesCounter%12 == 0 { // Every 12 frames, one more letter!
+				lettersCount++
+				framesCounter = 0
+			}
+
+			if lettersCount >= 6 { // When all letters have appeared, just fade out everything
+				alpha -= 0.02
+
+				if alpha <= 0.0 {
+					alpha = 0.0
+					state = 4
+				}
+			}
+		} else if state == 4 { // State 4: Reset and Replay
+			if raylib.IsKeyPressed(raylib.KeyR) {
+				framesCounter = 0
+				lettersCount = 0
+
+				topSideRecWidth = 16
+				leftSideRecHeight = 16
+
+				bottomSideRecWidth = 16
+				rightSideRecHeight = 16
+
+				alpha = 1.0
+				state = 0 // Return to State 0
+			}
+		}
+
+		raylib.BeginDrawing()
+		raylib.ClearBackground(raylib.RayWhite)
+
+		if state == 0 {
+			if (framesCounter/15)%2 == 0 {
+				raylib.DrawRectangle(logoPositionX, logoPositionY, 16, 16, raylib.Black)
+			}
+		} else if state == 1 {
+			raylib.DrawRectangle(logoPositionX, logoPositionY, topSideRecWidth, 16, raylib.Black)
+			raylib.DrawRectangle(logoPositionX, logoPositionY, 16, leftSideRecHeight, raylib.Black)
+		} else if state == 2 {
+			raylib.DrawRectangle(logoPositionX, logoPositionY, topSideRecWidth, 16, raylib.Black)
+			raylib.DrawRectangle(logoPositionX, logoPositionY, 16, leftSideRecHeight, raylib.Black)
+
+			raylib.DrawRectangle(logoPositionX+240, logoPositionY, 16, rightSideRecHeight, raylib.Black)
+			raylib.DrawRectangle(logoPositionX, logoPositionY+240, bottomSideRecWidth, 16, raylib.Black)
+		} else if state == 3 {
+			raylib.DrawRectangle(logoPositionX, logoPositionY, topSideRecWidth, 16, raylib.Fade(raylib.Black, alpha))
+			raylib.DrawRectangle(logoPositionX, logoPositionY+16, 16, leftSideRecHeight-32, raylib.Fade(raylib.Black, alpha))
+
+			raylib.DrawRectangle(logoPositionX+240, logoPositionY+16, 16, rightSideRecHeight-32, raylib.Fade(raylib.Black, alpha))
+			raylib.DrawRectangle(logoPositionX, logoPositionY+240, bottomSideRecWidth, 16, raylib.Fade(raylib.Black, alpha))
+
+			raylib.DrawRectangle(screenWidth/2-112, screenHeight/2-112, 224, 224, raylib.Fade(raylib.RayWhite, alpha))
+
+			text := "raylib"
+			length := int32(len(text))
+			if lettersCount > length {
+				lettersCount = length
+			}
+
+			raylib.DrawText(text[0:lettersCount], screenWidth/2-44, screenHeight/2+48, 50, raylib.Fade(raylib.Black, alpha))
+		} else if state == 4 {
+			raylib.DrawText("[R] REPLAY", 340, 200, 20, raylib.Gray)
+		}
+
+		raylib.EndDrawing()
+	}
+
+	raylib.CloseWindow()
+}