Initial data commit

Task/Snake/JavaScript/snake.js

@@ -0,0 +1,107 @@
+const L = 1, R = 2, D = 4, U = 8;
+var block = 24, wid = 30, hei = 20, frameR = 7, fruit, snake;
+function Snake() {
+    this.length = 1;
+    this.alive = true;
+    this.pos = createVector( 1, 1 );
+    this.posArray = [];
+    this.posArray.push( createVector( 1, 1 ) );
+    this.dir = R;
+    this.draw = function() {
+        fill( 130, 190, 0 );
+        var pos, i = this.posArray.length - 1, l = this.length;
+        while( true ){
+            pos = this.posArray[i--];
+            rect( pos.x * block, pos.y * block, block, block );
+            if( --l == 0 ) break;
+        }
+    }
+    this.eat = function( frut ) {
+        var b = this.pos.x == frut.x && this.pos.y == frut.y;
+        if( b ) this.length++;
+        return b;
+    }
+    this.overlap = function() {
+        var len = this.posArray.length - 1;
+        for( var i = len; i > len - this.length; i-- ) {
+            tp = this.posArray[i];
+            if( tp.x === this.pos.x && tp.y === this.pos.y ) return true;
+        }
+        return false;
+    }
+    this.update = function() {
+        if( !this.alive ) return;
+        switch( this.dir ) {
+            case L:
+                this.pos.x--; if( this.pos.x < 1 ) this.pos.x = wid - 2;
+            break;
+            case R:
+                this.pos.x++; if( this.pos.x > wid - 2 ) this.pos.x = 1;
+            break;
+            case U:
+                this.pos.y--; if( this.pos.y < 1 ) this.pos.y = hei - 2;
+            break;
+            case D:
+                this.pos.y++; if( this.pos.y > hei - 2 ) this.pos.y = 1;
+            break;
+        }
+        if( this.overlap() ) { this.alive = false; } else {
+            this.posArray.push( createVector( this.pos.x, this.pos.y ) );
+            if( this.posArray.length > 5000 ) { this.posArray.splice( 0, 1 ); }
+        }
+    }
+}
+function Fruit() {
+    this.fruitTime = true;
+    this.pos = createVector();
+    this.draw = function() {
+        fill( 200, 50, 20 );
+        rect( this.pos.x * block, this.pos.y * block, block, block );
+    }
+
+    this.setFruit = function() {
+        this.pos.x = floor( random( 1, wid - 1 ) );
+        this.pos.y = floor( random( 1, hei - 1 ) );
+        this.fruitTime = false;
+    }
+}
+function setup() {
+    createCanvas( block * wid, block * hei );
+    noStroke(); frameRate( frameR );
+    snake = new Snake();fruit = new Fruit();
+}
+function keyPressed() {
+    switch( keyCode ) {
+        case LEFT_ARROW: snake.dir = L; break;
+        case RIGHT_ARROW: snake.dir = R; break;
+        case UP_ARROW: snake.dir = U; break;
+        case DOWN_ARROW: snake.dir = D;
+    }
+}
+function draw() {
+    background( color( 0, 0x22, 0 ) );
+    fill( 20, 50, 120 );
+    for( var i = 0; i < wid; i++ ) {
+        rect( i * block, 0, block, block );
+        rect( i * block, height - block, block, block );
+    }
+    for( var i = 1; i < hei - 1; i++ ) {
+        rect( 1, i * block, block, block );
+        rect( width - block, i * block, block, block );
+    }
+    if( fruit.fruitTime ) {
+        fruit.setFruit();
+        frameR += .2;
+        frameRate( frameR );
+    }
+    fruit.draw();
+    snake.update();
+    if( snake.eat( fruit.pos ) ) {
+        fruit.fruitTime = true;
+    }
+    snake.draw();
+    fill( 200 );
+    textStyle( BOLD ); textAlign( RIGHT ); textSize( 120 );
+    text( ""+( snake.length - 1 ), 690, 440 );
+    if( !snake.alive ) text( "THE END", 630, 250 );
+}