easings examples added

examples/shapes/easings_rectangle_array/main.go

@@ -0,0 +1,92 @@
+package main
+
+import (
+	ez "github.com/gen2brain/raylib-go/easings"
+	rl "github.com/gen2brain/raylib-go/raylib"
+)
+
+var (
+	playTime = float32(240)
+	fps      = int32(60)
+)
+
+const (
+	recsW, recsH = 50, 50
+	screenWidth  = int32(800)
+	screenHeight = int32(450)
+	maxRecsX     = int(screenWidth) / recsW
+	maxRecsY     = int(screenHeight) / recsH
+)
+
+func main() {
+
+	rl.InitWindow(screenWidth, screenHeight, "raylib [shapes] example - easings rectangle array")
+
+	var recs [maxRecsX * maxRecsY]rl.Rectangle
+
+	for y := 0; y < maxRecsY; y++ {
+
+		for x := 0; x < maxRecsX; x++ {
+			recs[y*maxRecsX+x].X = float32(recsW/2 + recsW*float32(x))
+			recs[y*maxRecsX+x].Y = float32(recsH/2 + recsH*float32(y))
+			recs[y*maxRecsX+x].Width = float32(recsW)
+			recs[y*maxRecsX+x].Height = float32(recsH)
+		}
+
+	}
+
+	rotation := float32(0)
+	frameCount := float32(0)
+	state := 0
+
+	rl.SetTargetFPS(fps)
+
+	for !rl.WindowShouldClose() {
+
+		if state == 0 {
+			frameCount++
+
+			for i := 0; i < maxRecsX*maxRecsY; i++ {
+				recs[i].Height = float32(ez.LinearIn(frameCount, recsH, -recsH, playTime))
+				recs[i].Width = float32(ez.LinearIn(frameCount, recsW, -recsW, playTime))
+
+				if recs[i].Height < 0 {
+					recs[i].Height = 0
+				}
+
+				if recs[i].Width < 0 {
+					recs[i].Width = 0
+				}
+
+				if recs[i].Height == 0 && recs[i].Width == 0 {
+					state = 1
+				}
+				rotation = float32(ez.LinearIn(frameCount, 0, 360, playTime))
+			}
+		} else if state == 1 && rl.IsKeyPressed(rl.KeySpace) {
+			frameCount = 0
+			for i := 0; i < maxRecsX*maxRecsY; i++ {
+				recs[i].Height = float32(recsH)
+				recs[i].Width = float32(recsW)
+			}
+
+			state = 0
+		}
+
+		rl.BeginDrawing()
+		rl.ClearBackground(rl.RayWhite)
+
+		if state == 0 {
+			for i := 0; i < maxRecsX*maxRecsY; i++ {
+				rl.DrawRectanglePro(recs[i], rl.NewVector2(recs[i].Width/2, recs[i].Height/2), rotation, rl.Red)
+			}
+		} else if state == 1 {
+			txtlen := rl.MeasureText("SPACE to replay", 20)
+			rl.DrawText("SPACE to replay", (screenWidth/2)-txtlen/2, 200, 20, rl.Black)
+		}
+
+		rl.EndDrawing()
+	}
+
+	rl.CloseWindow()
+}