17.2.MDDN342 PS3
This is the starter README for PS3. As you update your code, replace this text with information on your progress. Also be sure to periodically update your preview.jpg and thumbnail.png files.
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PS3 MDDN 342 2018
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| license: mit | |
| height: 480 |
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| function setup () { | |
| createCanvas(960, 480); | |
| background(128); | |
| } | |
| function draw () { | |
| if (mouseIsPressed) { | |
| fill(0); | |
| } | |
| else { | |
| fill(255); | |
| } | |
| ellipse(mouseX, mouseY, 80, 80); | |
| } | |
| function keyTyped() { | |
| if (key == '!') { | |
| saveBlocksImages(); | |
| } | |
| } |
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| <head> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.7.2/p5.js"></script> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.7.2/addons/p5.dom.js"></script> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/seedrandom/2.4.3/seedrandom.min.js"></script> | |
| <script src="https://d3js.org/d3-random.v1.min.js"></script> | |
| <script language="javascript" type="text/javascript" src="z_purview_helper.js"></script> | |
| <script language="javascript" type="text/javascript" src="z_focused_random.js"></script> | |
| <script language="javascript" type="text/javascript" src="design1.js"></script> | |
| <style> body {padding: 0; margin: 0;} </style> | |
| </head> | |
| <body style="background-color:white"> | |
| </body> |
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| function resetFocusedRandom() { | |
| return Math.seedrandom(arguments); | |
| } | |
| function focusedRandom(min, max, focus, mean) { | |
| // console.log("hello") | |
| if(max === undefined) { | |
| max = min; | |
| min = 0; | |
| } | |
| if(focus === undefined) { | |
| focus = 1.0; | |
| } | |
| if(mean === undefined) { | |
| mean = (min + max) / 2.0; | |
| } | |
| if(focus == 0) { | |
| return d3.randomUniform(min, max)(); | |
| } | |
| else if(focus < 0) { | |
| focus = -1 / focus; | |
| } | |
| let sigma = (max - min) / (2 * focus); | |
| let val = d3.randomNormal(mean, sigma)(); | |
| if (val >= min && val < max) { | |
| return val; | |
| } | |
| return d3.randomUniform(min, max)(); | |
| } |
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| // note: this file is poorly named - it can generally be ignored. | |
| // helper functions below for supporting blocks/purview | |
| function saveBlocksImages(doZoom) { | |
| if(doZoom == null) { | |
| doZoom = false; | |
| } | |
| // generate 960x500 preview.jpg of entire canvas | |
| // TODO: should this be recycled? | |
| var offscreenCanvas = document.createElement('canvas'); | |
| offscreenCanvas.width = 960; | |
| offscreenCanvas.height = 500; | |
| var context = offscreenCanvas.getContext('2d'); | |
| // background is flat white | |
| context.fillStyle="#FFFFFF"; | |
| context.fillRect(0, 0, 960, 500); | |
| context.drawImage(this.canvas, 0, 0, 960, 500); | |
| // save to browser | |
| var downloadMime = 'image/octet-stream'; | |
| var imageData = offscreenCanvas.toDataURL('image/jpeg'); | |
| imageData = imageData.replace('image/jpeg', downloadMime); | |
| p5.prototype.downloadFile(imageData, 'preview.jpg', 'jpg'); | |
| // generate 230x120 thumbnail.png centered on mouse | |
| offscreenCanvas.width = 230; | |
| offscreenCanvas.height = 120; | |
| // background is flat white | |
| context = offscreenCanvas.getContext('2d'); | |
| context.fillStyle="#FFFFFF"; | |
| context.fillRect(0, 0, 230, 120); | |
| if(doZoom) { | |
| // pixelDensity does the right thing on retina displays | |
| var pd = this._pixelDensity; | |
| var sx = pd * mouseX - pd * 230/2; | |
| var sy = pd * mouseY - pd * 120/2; | |
| var sw = pd * 230; | |
| var sh = pd * 120; | |
| // bounds checking - just displace if necessary | |
| if (sx < 0) { | |
| sx = 0; | |
| } | |
| if (sx > this.canvas.width - sw) { | |
| sx = this.canvas.width - sw; | |
| } | |
| if (sy < 0) { | |
| sy = 0; | |
| } | |
| if (sy > this.canvas.height - sh) { | |
| sy = this.canvas.height - sh; | |
| } | |
| // save to browser | |
| context.drawImage(this.canvas, sx, sy, sw, sh, 0, 0, 230, 120); | |
| } | |
| else { | |
| // now scaledown | |
| var full_width = this.canvas.width; | |
| var full_height = this.canvas.height; | |
| context.drawImage(this.canvas, 0, 0, full_width, full_height, 0, 0, 230, 120); | |
| } | |
| imageData = offscreenCanvas.toDataURL('image/png'); | |
| imageData = imageData.replace('image/png', downloadMime); | |
| // call this function after 1 second | |
| setTimeout(function(){ | |
| p5.prototype.downloadFile(imageData, 'thumbnail.png', 'png'); | |
| }, 1000); | |
| } |
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