raylib/ports/shapes/shapes_logo_raylib_anim

Source

shapes_logo_raylib_anim.odin ¶

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1package raylib_examples
2
3/*******************************************************************************************
4*
5*   raylib [shapes] example - raylib logo animation
6*
7*   This example was originally created in C with raylib 1.0, and updated with raylib 4.0
8*   before being translated to Odin.
9*
10*   The original example in C can be found on raylib.com at:
11*
12*   https://www.raylib.com/examples/shapes/loader.html?name=shapes_logo_raylib_anim
13*
14*   raylib is licensed under an unmodified zlib/libpng license, which is an OSI-certified,
15*   BSD-like license that allows static linking with closed source software. The license
16*   can be found in its entirety as part of the standard Odin distribution at:
17*
18*   /vendor/raylib/LICENSE
19*
20*   or online at:
21*
22*   https://www.raylib.com/license.html
23*
24*   This example is licensed under an unmodified zlib/libpng license, which is an
25*   OSI-certified, BSD-like license that allows static linking with closed source software.
26*
27*   Copyright (c) 2014-2023 Ramon Santamaria (@raysan5)
28*   Copyright (c) 2023 Benjamin G. Thompson (@bg-thompson)
29*
30********************************************************************************************/
31
32import rl "vendor:raylib"
33
34SCREEN_WIDTH  :: 800
35SCREEN_HEIGHT :: 450
36
37State :: enum u8 {
38	STATE_0,
39	STATE_1,
40	STATE_2,
41	STATE_3,
42	STATE_4,
43}
44
45main :: proc() {
46	rl.InitWindow(SCREEN_WIDTH, SCREEN_HEIGHT, "raylib [shapes] example - raylib logo animation")
47	defer rl.CloseWindow() // Close window and OpenGL context when leaving main.
48
49	logoPosX: i32 = SCREEN_WIDTH  / 2 - 128
50	logoPosY: i32 = SCREEN_HEIGHT / 2 - 128
51
52	framesCounter := 0
53	lettersCount: i32 = 0
54
55	topSideRecWidth:    i32 = 16
56	leftSideRecHeight:  i32 = 16
57	bottomSideRecWidth: i32 = 16
58	rightSideRecHeight: i32 = 16
59
60
61	state := State.STATE_0 // Track animation states.
62	alpha: f32 = 1.0       // Useful for fading.
63	rl.SetTargetFPS(60)    // Set frames per second.
64
65	// The primary loop.
66	for !rl.WindowShouldClose() { // Detect window close button or ESC key press.
67		switch state {
68		case .STATE_0:                 // State 0: Small box blinking.
69			framesCounter += 1
70			if framesCounter == 120 {
71				state = .STATE_1
72				framesCounter = 0      // Reset counter... will be used later...
73			}
74
75		case .STATE_1:                 // State 1: Top and left bars growing.
76			topSideRecWidth   += 4
77			leftSideRecHeight += 4
78			if topSideRecWidth == 256 {
79				state = .STATE_2
80			}
81
82		case .STATE_2:                 // State 2: Bottom and right bars growing.
83			bottomSideRecWidth += 4
84			rightSideRecHeight += 4
85			if bottomSideRecWidth == 256 {
86				state = .STATE_3
87			}
88
89		case .STATE_3:                 // State 3: Letters appearing (one by one).
90			framesCounter += 1
91			if framesCounter / 12 == 1 { // Every 12 frames, one more letter!
92				lettersCount += 1
93				framesCounter = 0
94			}
95
96			if lettersCount >= 10 { // When all letters have appeared, fade out everything.
97				alpha -= 0.02
98				if alpha <= 0 {
99					alpha = 0
100					state = .STATE_4
101				}
102			}
103
104		case .STATE_4:
105			if rl.IsKeyPressed(rl.KeyboardKey.R) {
106				framesCounter      = 0
107				lettersCount       = 0
108				topSideRecWidth    = 16
109				leftSideRecHeight  = 16
110				bottomSideRecWidth = 16
111				rightSideRecHeight = 16
112				alpha = 1.0
113				state = .STATE_0          // Return to State 0
114			}
115		}
116
117		// Start drawing.
118		rl.BeginDrawing()
119
120		rl.ClearBackground(rl.RAYWHITE)
121
122		switch state {
123		case .STATE_0:
124			if (framesCounter / 15) % 2 != 0 {
125				rl.DrawRectangle(logoPosX, logoPosY, 16, 16, rl.BLACK)
126			}
127
128		case .STATE_1:
129			rl.DrawRectangle(logoPosX, logoPosY, topSideRecWidth, 16, rl.BLACK)
130			rl.DrawRectangle(logoPosX, logoPosY, 16, leftSideRecHeight, rl.BLACK)
131
132		case .STATE_2:
133			rl.DrawRectangle(logoPosX, logoPosY, topSideRecWidth, 16, rl.BLACK)
134			rl.DrawRectangle(logoPosX, logoPosY, 16, leftSideRecHeight, rl.BLACK)
135
136			rl.DrawRectangle(logoPosX + 240, logoPosY, 16, rightSideRecHeight, rl.BLACK)
137			rl.DrawRectangle(logoPosX, logoPosY + 240, bottomSideRecWidth, 16, rl.BLACK)
138
139		case .STATE_3:
140			rl.DrawRectangle(logoPosX, logoPosY, topSideRecWidth, 16, rl.Fade(rl.BLACK, alpha))
141			rl.DrawRectangle(logoPosX, logoPosY + 16, 16, leftSideRecHeight - 32, rl.Fade(rl.BLACK, alpha))
142
143			rl.DrawRectangle(logoPosX + 240, logoPosY + 16, 16, rightSideRecHeight - 32, rl.Fade(rl.BLACK, alpha))
144			rl.DrawRectangle(logoPosX, logoPosY + 240, bottomSideRecWidth, 16, rl.Fade(rl.BLACK, alpha))
145
146			rl.DrawRectangle(rl.GetScreenWidth() / 2 - 112, rl.GetScreenHeight() / 2 - 112, 224, 224, rl.Fade(rl.RAYWHITE, alpha))
147
148			rl.DrawText(rl.TextSubtext("raylib", 0, lettersCount), rl.GetScreenWidth()/2 - 44, rl.GetScreenHeight() / 2 + 48, 50, rl.Fade(rl.BLACK, alpha))
149
150		case .STATE_4:
151			rl.DrawText("[R] REPLAY", 340, 200, 20, rl.GRAY)
152		}
153		rl.EndDrawing()
154	}
155}