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| class Graphics { | |
| constructor(board) { | |
| this.board = board; | |
| } | |
| circle(x, y, r, fill=false) { | |
| this.canvas.beginPath(); | |
| this.canvas.arc(x, y, r, 0, 2 * Math.PI); | |
| this.canvas.stroke(); | |
| if(fill) { | |
| this.canvas.fill(); | |
| } | |
| } | |
| draw() { | |
| this.x = 0; | |
| this.y = 0; | |
| this.w = 100; | |
| this.h = 100; | |
| this.r = this.w / 2; | |
| this.canvas = /** @type {CanvasRenderingContext2D} */ (document.getElementById(this.board).getContext("2d")); | |
| this.canvas.fillStyle = 'red'; | |
| this.canvas.fillRect(this.x, this.y, this.w, this.h); | |
| this.canvas.fillStyle = 'blue'; | |
| this.circle(this.x + this.r, this.y + this.r, this.r - 2, true); | |
| for(let i = this.r; i > 0; i -= 6) { | |
| this.canvas.strokeStyle = 'white'; | |
| this.circle(this.r, this.r, i); | |
| } | |
| } | |
| } | |
| var g = new Graphics("board"); |
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <title>Graphics Test</title> | |
| <link rel="stylesheet" href="css/styles.css"> | |
| <script type="text/javascript" src="scripts/canvas.js"></script> | |
| </head> | |
| <body onload="g.draw()"> | |
| <canvas id="board"> | |
| </canvas> | |
| </body> | |
| </html> |
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