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Shep's simplistic city building game
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| {"Object1": {"Width": "40","Height": "40", "Color": "blue", "Left": "0", "Top": "0"}, "Object2": {"Width": "40", "Height": "40", "Color": "red", "Left": "100", "Top": "100"}} |
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| // Function to draw object | |
| function drawObject(ctx, left, top, size1, size2, fillcolour) { | |
| ctx.beginPath(); | |
| ctx.rect(left, top, size1, size2); | |
| ctx.fillStyle = fillcolour; | |
| ctx.fill(); | |
| } | |
| // Function to update view | |
| function updateView(ctx, jsonData) { | |
| var gameData = JSON.parse(jsonData, (key, objectData) => { | |
| // key = Object1, etc. | |
| document.getElementById("myCanvas").innerHTML = drawObject(ctx, objectData.Left, objectData.Top, objectData.Width, objectData.Height, objectData.Color); | |
| return objectData; // return the unchanged property value. | |
| }); | |
| } | |
| // Update view using JSON | |
| function updateWithJson(ctx, url) { | |
| var xhttp = new XMLHttpRequest(); | |
| xhttp.onreadystatechange = function() { | |
| if (this.readyState == 4 && this.status == 200) { | |
| // Update view with current json | |
| updateView(ctx, this.responseText); | |
| } | |
| }; | |
| xhttp.open("GET", url, true); | |
| xhttp.send(); | |
| } |
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| <!DOCTYPE html> | |
| <html> | |
| <body> | |
| <center> | |
| <canvas id="myCanvas" width="1000" height="1000" style="border:1px solid #d3d3d3;"> | |
| Your browser does not support the HTML5 canvas tag. | |
| </canvas> | |
| </center> | |
| <!-- Include functions --> | |
| <script src="functions.js"></script> | |
| <!-- The Game --> | |
| <script> | |
| var c = document.getElementById("myCanvas") | |
| var ctx = c.getContext("2d"); | |
| ctx.beginPath(); | |
| ctx.rect(0, 0, 1000, 1000); | |
| ctx.fillStyle = "#1ac600"; | |
| ctx.fill(); | |
| updateWithJson(ctx, "example.json"); | |
| </script> | |
| </body> | |
| </html> |
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