easings examples added

examples/shapes/easings_ball_anim/main.go

@@ -0,0 +1,86 @@
+package main
+
+import (
+	ez "github.com/gen2brain/raylib-go/easings"
+	rl "github.com/gen2brain/raylib-go/raylib"
+)
+
+func main() {
+	screenWidth := int32(800)
+	screenHeight := int32(450)
+
+	rl.SetConfigFlags(rl.FlagMsaa4xHint)
+
+	rl.InitWindow(screenWidth, screenHeight, "raylib [shapes] example - easings ball anim")
+
+	ballPosX := -100
+	ballRadius := 20
+	ballAlpha := float32(0)
+
+	state := 0
+	frames := 0
+
+	rl.SetTargetFPS(60)
+
+	for !rl.WindowShouldClose() {
+
+		if state == 0 {
+
+			frames++
+			ballPosX = int(ez.ElasticOut(float32(frames), -100, float32(screenWidth/2)+100, 100))
+
+			if frames >= 100 {
+				frames = 0
+				state = 1
+			}
+
+		} else if state == 1 {
+			frames++
+			ballRadius = int(ez.ElasticIn(float32(frames), 20, 500, 150))
+
+			if frames >= 150 {
+				frames = 0
+				state = 2
+			}
+		} else if state == 2 {
+			frames++
+			ballAlpha = ez.CubicOut(float32(frames), 0, 1, 150)
+
+			if frames >= 150 {
+				frames = 0
+				state = 3
+			}
+		} else if state == 3 {
+			if rl.IsKeyPressed(rl.KeyEnter) {
+				ballPosX = -100
+				ballRadius = 20
+				ballAlpha = 0
+				state = 0
+			}
+
+		}
+
+		if rl.IsKeyPressed(rl.KeyR) {
+			frames = 0
+		}
+
+		rl.BeginDrawing()
+		rl.ClearBackground(rl.RayWhite)
+
+		if state >= 2 {
+			rl.DrawRectangle(0, 0, screenWidth, screenHeight, rl.Green)
+		}
+
+		rl.DrawCircle(int32(ballPosX), 200, float32(ballRadius), rl.Fade(rl.Red, 1-ballAlpha))
+
+		if state == 3 {
+			textlen := rl.MeasureText("press ENTER to replay", 20)
+			rl.DrawText("press ENTER to replay", (screenWidth/2)-textlen/2, 200, 20, rl.Black)
+		}
+
+		rl.EndDrawing()
+
+	}
+
+	rl.CloseWindow()
+}

examples/shapes/easings_box_anim/main.go

@@ -0,0 +1,99 @@
+package main
+
+import (
+	ez "github.com/gen2brain/raylib-go/easings"
+	rl "github.com/gen2brain/raylib-go/raylib"
+)
+
+var (
+	fps = int32(60)
+)
+
+const (
+	screenWidth  = int32(800)
+	screenHeight = int32(450)
+)
+
+func main() {
+
+	rl.InitWindow(screenWidth, screenHeight, "raylib [shapes] example - easings box anim")
+
+	rec := rl.NewRectangle(float32(screenWidth/2), -100, 100, 100)
+	rotation := float32(0)
+	alpha := float32(1)
+
+	state := 0
+	frames := 0
+
+	rl.SetTargetFPS(fps)
+
+	for !rl.WindowShouldClose() {
+
+		switch state {
+		case 0:
+			frames++
+
+			rec.Y = ez.ElasticOut(float32(frames), -100, float32(screenHeight/2)+100, 120)
+
+			if frames >= 120 {
+				frames = 0
+				state = 1
+			}
+
+		case 1:
+			frames++
+			rec.Height = ez.BounceOut(float32(frames), 100, -90, 120)
+			rec.Width = ez.BounceOut(float32(frames), 100, float32(screenWidth), 120)
+
+			if frames >= 120 {
+				frames++
+				state = 2
+			}
+		case 2:
+			frames++
+			rotation = ez.QuadOut(float32(frames), 0, 270, 240)
+			if frames >= 240 {
+				frames = 0
+				state = 3
+			}
+		case 3:
+			frames++
+			rec.Height = ez.CircOut(float32(frames), 10, float32(screenWidth), 120)
+			if frames >= 120 {
+				frames = 0
+				state = 4
+			}
+
+		case 4:
+			frames++
+			alpha = ez.SineOut(float32(frames), 1, -1, 160)
+			if frames >= 160 {
+				frames = 0
+				state = 5
+			}
+		default:
+			break
+		}
+
+		if rl.IsKeyPressed(rl.KeySpace) {
+			rec = rl.NewRectangle(float32(screenWidth/2), -100, 100, 100)
+			rotation = 0
+			alpha = 1
+			state = 0
+			frames = 0
+		}
+
+		rl.BeginDrawing()
+		rl.ClearBackground(rl.RayWhite)
+
+		rl.DrawRectanglePro(rec, rl.NewVector2(rec.Width/2, rec.Height/2), rotation, rl.Fade(rl.Black, alpha))
+
+		if state == 5 {
+			txtlen := rl.MeasureText("SPACE to replay", 20)
+			rl.DrawText("SPACE to replay", (screenWidth/2)-txtlen/2, 200, 20, rl.Black)
+		}
+		rl.EndDrawing()
+	}
+
+	rl.CloseWindow()
+}

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()
+}