pabloid
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CloudInvaders
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Rain effect + optimisations

Pabloader vor 2 Jahren
Ursprung
15cfc67ea3
Commit
87032574e2
9 geänderte Dateien mit 181 neuen und 73 gelöschten Zeilen
Geteilte Ansicht Diff-Statistik anzeigen
  1. 6
    38
      css/style.css
  2. 2
    0
      index.html
  3. 40
    2
      js/bullet.js
  4. 46
    13
      js/cloud.js
  5. 17
    7
      js/entity.js
  6. 29
    3
      js/game.js
  7. 20
    9
      js/shooting_pad.js
  8. 19
    0
      js/utils.js
  9. 2
    1
      todo.md

+ 6
- 38
css/style.css Datei anzeigen 

@@ -13,9 +13,8 @@ html, body {
13 13 
     font-family: arial;
14 14 
 }
15 15
16 
-#root {
17 
-    background: rgb(31, 31, 31);
18 
-    position: relative;
16 
+#root, #canvas {
17 
+    position: absolute;
19 18 
     margin: 0;
20 19 
     padding: 0;
21 20 
     width: 100%;
 
@@ -24,6 +23,10 @@ html, body {
24 23 
     overflow: hidden;
25 24 
 }
26 25
26 
+#canvas {
27 
+    background: rgb(31, 31, 31);
28 
+}
29 
+
27 30 
 #root div {
28 31 
     transform: translate(-50%, -50%);
29 32 
     position: absolute;
 
@@ -37,23 +40,6 @@ html, body {
37 40 
     animation-direction: alternate;
38 41 
 }
39 42
40 
-.shooting-pad {
41 
-    background: url('../img/shooting-pad.svg') no-repeat;
42 
-    background-size: 100%;
43 
-    animation-iteration-count: 10;
44 
-    animation-duration: 200ms;
45 
-}
46 
-
47 
-.bullet {
48 
-    background: yellow;
49 
-    width: 1px !important;
50 
-}
51 
-
52 
-.raindrop {
53 
-    background: cyan;
54 
-    width: 1px !important;
55 
-}
56 
-
57 43 
 .result {
58 44 
     left: 50%;
59 45 
     top: 50%;
 
@@ -92,22 +78,4 @@ html, body {
92 78 
         transform: translate(-50%) scale(0.2);
93 79 
         opacity: 0.1;
94 80 
     }
95 
-}
96 
-
97 
-@keyframes blink {
98 
-    0% {
99 
-        opacity: 1;
100 
-    }
101 
-    1% {
102 
-        opacity: 0;
103 
-    }
104 
-    50% {
105 
-        opacity: 0;
106 
-    }
107 
-    51% {
108 
-        opacity: 1;
109 
-    }
110 
-    100% {
111 
-        opacity: 1;
112 
-    }
113 81 
 }

+ 2
- 0
index.html Datei anzeigen 

@@ -6,9 +6,11 @@
6 6 
         <meta charset="utf-8">
7 7 
     </head>
8 8 
     <body>
9 
+        <canvas id="canvas" width="1280" height="720"></canvas>
9 10 
         <div id="root">
10 11 
             <section id="lives"></section>
11 12 
         </div>
13 
+        <script src="https://cdn.jsdelivr.net/gh/josephg/noisejs/perlin.js"></script>
12 14 
         <script src="js/utils.js"></script>
13 15 
         <script src="js/entity.js"></script>
14 16 
         <script src="js/bullet.js"></script>

+ 40
- 2
js/bullet.js Datei anzeigen 

@@ -1,7 +1,7 @@
1 1 
 class Bullet extends Entity {
2 2 
     constructor(x, y) {
3 3 
         super(x, y, 0.001, 0.02);
4 
-        this.element.className = 'bullet';
4 
+        this.color = 'yellow';
5 5 
     }
6 6
7 7 
     update() {
 
@@ -24,7 +24,7 @@ class Bullet extends Entity {
24 24 
 class RainDrop extends Bullet {
25 25 
     constructor(x, y) {
26 26 
         super(x, y);
27 
-        this.element.className = 'raindrop';
27 
+        this.color = 'cyan';
28 28 
     }
29 29
30 30 
     update() {
 
@@ -38,4 +38,42 @@ class RainDrop extends Bullet {
38 38 
             }
39 39 
         }
40 40 
     }
41 
+}
42 
+
43 
+const currentAngle = () => {
44 
+    const x = Date.now() / 10000;
45 
+    const n = noise.simplex2(x, 0);
46 
+
47 
+    return mapNumber(n, -1, 1, 45, 135);
48 
+};
49 
+
50 
+
51 
+class BackgroundRaindrop extends Bullet {
52 
+    constructor(x, y, speed) {
53 
+        super(x, y);
54 
+        this.speed = speed;
55 
+    }
56 
+
57 
+    draw() {
58 
+        CTX.save();
59 
+        const { x, y, w, h } = this.getScreenCoords();
60 
+        CTX.translate(x, y);
61 
+        CTX.rotate(toRadians(currentAngle() - 90));
62 
+        CTX.fillStyle = `rgba(200, 255, 255, 0.2)`;
63 
+        CTX.fillRect(0, 0, w, h);
64 
+        CTX.restore();
65 
+    }
66 
+
67 
+    update() {
68 
+        const cs = Math.cos(toRadians(currentAngle()));
69 
+        const sn = Math.sin(toRadians(currentAngle()));
70 
+
71 
+        this.x += this.speed * cs;
72 
+        this.y += this.speed * sn;
73 
+
74 
+        if (this.y > 1.1) {
75 
+            this.y = randRange(-1, -0.1);
76 
+            this.x = randRange(-0.5, 1.5);
77 
+        }
78 
+    }
41 79 
 }

+ 46
- 13
js/cloud.js Datei anzeigen 

@@ -6,19 +6,52 @@ class Cloud extends Entity {
6 6
7 7 
     constructor(...args) {
8 8 
         super(...args);
9 
-        this.element.className = 'cloud';
10 
-
11 
-        for (let i = 0; i < 10; i++) {
12 
-            const cloudParticle = document.createElement('div');
13 
-            cloudParticle.className = 'cloud-particle';
14 
-            cloudParticle.style.width = `${randRange(50, 80)}%`;
15 
-            cloudParticle.style.height = `${randRange(60, 100)}%`;
16 
-            cloudParticle.style.left = `${randRange(2, 98)}%`;
17 
-            cloudParticle.style.top = `${randRange(2, 98)}%`;
18 
-            cloudParticle.style.animationDelay = `${randRange(-10, 0)}s`;
19 
-            cloudParticle.style.animationDuration = `${randRange(0.5, 3)}s`;
20 
-
21 
-            this.element.appendChild(cloudParticle);
9 
+
10 
+        this.particles = new Set();
11 
+
12 
+        for (let i = 0; i < 3; i++) {
13 
+            const cloudParticle = {
14 
+                w: randRange(0.3, 0.8),
15 
+                h: randRange(0.3, 0.8),
16 
+                x: randRange(0.2, 0.8),
17 
+                y: randRange(0.2, 0.8),
18 
+                r: randRange(-Math.PI, Math.PI),
19 
+                n: randRange(-10000, 10000),
20 
+            }
21 
+
22 
+            this.particles.add(cloudParticle);
23 
+        }
24 
+    }
25 
+
26 
+    draw() {
27 
+        const { x, y, w, h } = this.getScreenCoords();
28 
+
29 
+        for (let particle of this.particles) {
30 
+            const px = x + particle.x * w;
31 
+            const py = y + particle.y * h;
32 
+            const pw = particle.w * w;
33 
+            const ph = particle.h * w;
34 
+            const now = Date.now() / 1000;
35 
+
36 
+            const a = mapNumber(
37 
+                noise.simplex3(particle.n, now / 2, 0),
38 
+                -1, 1,
39 
+                0, 0.7,
40 
+            );
41 
+            const r = mapNumber(
42 
+                noise.simplex3(particle.n, now / 10, 1),
43 
+                -1, 1,
44 
+                0, Math.PI,
45 
+            );
46 
+            const z = mapNumber(
47 
+                noise.simplex3(particle.n, now / 2, 2),
48 
+                -1, 1,
49 
+                0.5, 1.5,
50 
+            );
51 
+            CTX.fillStyle = `rgba(255, 255, 255, ${a})`;
52 
+            CTX.beginPath();
53 
+            CTX.ellipse(px, py, pw / 2 * z, ph / 2 * z, particle.r + r, 0, 2 * Math.PI);
54 
+            CTX.fill();
22 55 
         }
23 56 
     }
24 57

+ 17
- 7
js/entity.js Datei anzeigen 

@@ -5,22 +5,32 @@ class Entity {
5 5 
         this.w = w;
6 6 
         this.h = h;
7 7 
         this.element = document.createElement('div');
8 
-        ROOT.appendChild(this.element);
9 
-        this.draw();
10 8 
         this.alive = true;
11 9 
     }
12 10
11 
+    getScreenCoords() {
12 
+        return {
13 
+            x: (this.x - this.w / 2) * CANVAS.width,
14 
+            y: (this.y - this.h / 2) * CANVAS.height,
15 
+            w: this.w * CANVAS.width,
16 
+            h: this.h * CANVAS.height,
17 
+        }
18 
+    }
19 
+
13 20 
     draw() {
14 21 
         if (this.alive) {
15 
-            this.element.style.left = `${this.x * 100}%`;
16 
-            this.element.style.top = `${this.y * 100}%`;
17 
-            this.element.style.width = `${this.w * 100}%`;
18 
-            this.element.style.height = `${this.h * 100}%`;
22 
+            const { x, y, w, h } = this.getScreenCoords();
23 
+
24 
+            if (this.image) {
25 
+                CTX.drawImage(this.image, x, y, w, h);
26 
+            } else {
27 
+                CTX.fillStyle = this.color ?? 'red';
28 
+                CTX.fillRect(x, y, w, h);
29 
+            }
19 30 
         }
20 31 
     }
21 32
22 33 
     destroy() {
23 
-        this.element.remove();
24 34 
         this.alive = false;
25 35 
     }
26 36

+ 29
- 3
js/game.js Datei anzeigen 

@@ -1,10 +1,15 @@
1 1 
 const $ = (s) => document.querySelector(s);
2 2 
 const $$ = (s) => Array.from(document.querySelectorAll(s));
3 3 
 const ROOT = $('#root');
4 
+const CANVAS = $('#canvas');
5 
+const CTX = CANVAS.getContext('2d');
4 6 
 const X_BOUND = 0.05;
7 
+const GAME_OVER_BOUND = 0.9;
8 
+const MAX_RAINDROPS = 100;
5 9
6 10 
 const clouds = new Set();
7 11 
 const bullets = new Set();
12 
+const raindrops = new Set();
8 13 
 let shootingPad = new ShootingPad();
9 14 
 let running = true;
10 15 
 let direction = 1;
 
@@ -12,12 +17,25 @@ let direction = 1;
12 17 
 const initCloudField = () => {
13 18 
     for (let y = 0; y < 6; y++) {
14 19 
         for (let x = 0; x < 11; x++) {
15 
-            const cloud = new Cloud(X_BOUND + 0.06 * x, 0.04 + 0.04 * y, 0.03, 0.02);
20 
+            const cloud = new Cloud(X_BOUND + 0.06 * x, 0.04 + 0.06 * y, 0.03, 0.02);
16 21 
             clouds.add(cloud);
17 22 
         }
18 23 
     }
19 24 
 }
20 25
26 
+const initRainEffect = () => {
27 
+    noise.seed(Math.random());
28 
+    for (let i = 0; i < MAX_RAINDROPS; i++) {
29 
+        const raindrop = new BackgroundRaindrop(
30 
+            randRange(-0.5, 1.5),
31 
+            randRange(-1, -0.1),
32 
+            randRange(0.01, 0.03),
33 
+        );
34 
+
35 
+        raindrops.add(raindrop);
36 
+    }
37 
+}
38 
+
21 39 
 const start = () => {
22 40 
     $('.result')?.remove();
23 41 
 
@@ -46,16 +64,18 @@ const gameOver = (result) => {
46 64
47 65 
 const loop = () => {
48 66 
     if (!running) return;
67 
+    document.title = `${fps()} FPS | CloudInvaders | OLC Codejam 2022`;
68 
+    CTX.clearRect(0, 0, CANVAS.width, CANVAS.height);
49 69
50 70 
     let directionUpdated = false;
51 71 
     let isOver = false;
52 72 
     Array.from(clouds).forEach(c => {
53 73 
         c.update(direction);
54 74 
         c.draw();
55 
-        if (c.x < X_BOUND - 0.01 || c.x > 1.01 - X_BOUND) {
75 
+        if (c.x < X_BOUND || c.x > 1 - X_BOUND) {
56 76 
             directionUpdated = true;
57 77 
         }
58 
-        if (c.y >= 0.95) {
78 
+        if (c.y >= GAME_OVER_BOUND) {
59 79 
             isOver = true;
60 80 
         }
61 81 
         if (!c.alive) {
 
@@ -80,6 +100,11 @@ const loop = () => {
80 100 
         }
81 101 
     });
82 102
103 
+    raindrops.forEach(d => {
104 
+        d.update();
105 
+        d.draw();
106 
+    });
107 
+
83 108 
     shootingPad.update();
84 109 
     shootingPad.draw();
85 110 
 
@@ -96,4 +121,5 @@ document.addEventListener('keypress', () => {
96 121 
     }
97 122 
 });
98 123
124 
+initRainEffect();
99 125 
 start();

+ 20
- 9
js/shooting_pad.js Datei anzeigen 

@@ -7,28 +7,31 @@ document.addEventListener('keyup', (e) => {
7 7 
     keys[e.key] = false;
8 8 
 });
9 9
10 
+let blink = false;
11 
+
12 
+setInterval(() => blink = !blink, 200);
13 
+
10 14 
 const MAX_LIVES = 3;
15 
+const INVULNERABILITY_INTERVAL = 2000;
11 16
12 17 
 class ShootingPad extends Entity {
13 18 
     constructor() {
14 19 
         super(0.5, 0.95, 0.04, 0.03);
15 
-        this.element.className = 'shooting-pad';
20 
+        const image = new Image();
21 
+        image.src = 'img/shooting-pad.svg';
22 
+        image.onload = () => this.image = image;
23 
+
16 24 
         this.lastShootTime = Date.now();
17 25 
         this.invulnerable = false;
18 26 
         this.lives = MAX_LIVES;
19 27 
         this.initLives();
20 
-
21 
-        this.element.addEventListener('animationend', () => {
22 
-            this.element.style.animationName = null;
23 
-            this.invulnerable = false;
24 
-        });
25 28 
     }
26 29
27 30 
     update() {
28 
-        if (keys['ArrowLeft']) {
31 
+        if (keys['ArrowLeft'] || keys['a']) {
29 32 
             this.x -= VELOCITY[0] * 2;
30 33 
         }
31 
-        if (keys['ArrowRight']) {
34 
+        if (keys['ArrowRight'] || keys['d']) {
32 35 
             this.x += VELOCITY[0] * 2;
33 36 
         }
34 37 
         if (this.x < X_BOUND) {
 
@@ -44,6 +47,12 @@ class ShootingPad extends Entity {
44 47 
         }
45 48 
     }
46 49
50 
+    draw() {
51 
+        if (!this.invulnerable || blink) {
52 
+            super.draw();
53 
+        }
54 
+    }
55 
+
47 56 
     initLives() {
48 57 
         $('#lives').textContent = `× ${this.lives}`;
49 58 
     }
 
@@ -58,7 +67,9 @@ class ShootingPad extends Entity {
58 67 
             return gameOver('Game over');
59 68 
         } else {
60 69 
             this.invulnerable = true;
61 
-            this.element.style.animationName = 'blink';
70 
+            setTimeout(() => {
71 
+                this.invulnerable = false;
72 
+            }, INVULNERABILITY_INTERVAL);
62 73 
         }
63 74 
     }
64 75 
 }

+ 19
- 0
js/utils.js Datei anzeigen 

@@ -1 +1,20 @@
1 1 
 const randRange = (low, high) => Math.random() * (high - low) + low;
2 
+const toRadians = (degrees) => degrees * Math.PI / 180;
3 
+const mapNumber = (value, fromLow, fromHigh, toLow, toHigh) => {
4 
+    const normalized = (value - fromLow) / (fromHigh - fromLow);
5 
+    return normalized * (toHigh - toLow) + toLow;
6 
+};
7 
+
8 
+let fps_value = 0;
9 
+let fps_frames = 0;
10 
+let fps_last_capture = Date.now();
11 
+const fps = () => {
12 
+    fps_frames++;
13 
+    if (Date.now() - fps_last_capture >= 500) {
14 
+        fps_value = fps_frames * 2;
15 
+        fps_frames = 0;
16 
+        fps_last_capture = Date.now();
17 
+    }
18 
+
19 
+    return fps_value;
20 
+}

+ 2
- 1
todo.md Datei anzeigen 

@@ -3,7 +3,8 @@
3 3 
 - [x] lives
4 4 
 - [x] shooting platform sprite
5 5 
 - [ ] clouds should strike lightnings sometimes
6 
-- [ ] bg rain effect
6 
+- [x] bg rain effect
7 
+- [ ] animated gif for clouds
7 8 
 - [ ] boss?
8 9 
 - [ ] umbrella shields
9 10 
 - [ ] music & sounds

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