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noiseScale.jsx
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noiseScale.jsx
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//@include "lib/perlin-noise-simplex.js"
// This script requires "perlin-noise-simplex.js" by Sean McCullough.
// https://gist.github.com/banksean/304522
// The declaration on the first line assumes "perlin-noise-simplex.js" is
// placed under "lib" folder under "Scripts" folder of Adobe Illlustrator.
// ----
// noiseScale
// changes the size of the selected items using Simplex noise.
// USAGE: Select items and run this script.
// NOTE: compound paths are not released
// JavaScript Script for Adobe Illustrator
// Tested with Adobe Illustrator CC2018, Windows 10 (Japanese version).
// Copyright(c) 2018 Hiroyuki Sato
// https://github.com/shspage
// This script is distributed under the MIT License.
// See the LICENSE file for details.
(function(){
var _perlin;
var _n;
var _rangeHalf;
var _opts = {};
var _items = [];
var _rect;
var _fullLength;
// resize options (by my preference)
// Note that "changeLineWidth" is "false"
var _scaleOpt = {
changePositions:true,
changeFillPatterns:true,
changeFillGradients:true,
changeStrokePattern:true,
changeLineWidth:false,
scaleAbout:Transformation.CENTER
};
var main = function(){
var script_name = "noiseScale";
if(documents.length < 1) return;
if(activeDocument.selection.length < 1){
return;
}
// dialog
var previewed = false;
var clearPreview = function(){
if( previewed ){
try{
undo();
} catch(e){
alert(e);
} finally {
previewed = false;
}
}
}
var drawPreview = function(){
var ok = getValues();
if(ok){
try{
noiseMain();
} finally {
previewed = true;
}
}
}
var win = new Window("dialog", script_name);
win.alignChildren = "right";
// default values ---- edit as you prefer
var et_range_max = addEditText(win, "scale max(%):", "100");
var et_range_min = addEditText(win, "scale min(%):", "25");
var et_noise_factor = addEditText(win, "noise factor", "3");
var chkGrp = win.add("group");
chkGrp.alignment = "center";
var previewChk = chkGrp.add("checkbox", undefined, "preview");
var extractGroupChk = chkGrp.add("checkbox", undefined, "extract group");
extractGroupChk.value = true;
// buttons
var btnGrp = win.add("group");
var btn_ok = btnGrp.add("button", undefined, "OK");
var btn_cancel = btnGrp.add("button", undefined, "Cancel");
var getValues = function(){
_opts.range_max = parseFloat(et_range_max.text);
_opts.range_min = parseFloat(et_range_min.text);
_opts.noise_factor = parseFloat(et_noise_factor.text);
var ok = verifyOptsValues( _opts );
return ok;
}
var processPreview = function( is_preview ){
_items = [];
if(extractGroupChk.value){
extractPageItems(activeDocument.selection, _items);
} else {
_items = activeDocument.selection;
}
if(_items.length < 1){
alert("ABORT:\rnothing selected");
return;
}
_rect = getSelectedRect(_items);
_fullLength = Math.max(_rect.width, _rect.height);
if( ! is_preview || previewChk.value){
try{
win.enabled = false;
clearPreview();
drawPreview();
if( is_preview ) redraw();
} catch(e){
alert(e);
} finally{
win.enabled = true;
}
}
}
previewChk.onClick = function(){
if( this.value ){
processPreview( true );
} else {
if( previewed ){
clearPreview();
redraw();
}
}
}
btn_ok.onClick = function(){
if(!previewed) processPreview( false );
win.close();
}
btn_cancel.onClick = function(){
try{
win.enabled = false;
clearPreview();
} catch(e){
alert(e);
} finally{
win.enabled = true;
}
win.close();
}
win.show();
};
// -----------------------------------------------
var verifyOptsValues = function(_opts){
var ok = true;
var errmsg = "";
if(isNaN(_opts.range_max) || _opts.range_max <= 0){
errmsg = "max value is invalid";
} else if( isNaN(_opts.range_min) || _opts.range_min <= 0){
errmsg = "min value is invalid";
} else if( isNaN(_opts.noise_factor) || _opts.noise_factor < 0){
errmsg = "noise factor value is invalid";
}
if(errmsg != ""){
alert(errmsg);
ok = false;
}
return ok;
};
// -----------------------------------------------
// ScriptUI utility
var addEditText = function(win, label, defaultvalue){
var gr = win.add("group");
gr.add("statictext", undefined, label);
var et = gr.add("edittext", undefined, defaultvalue);
et.characters = 6;
return et;
};
// -----------------------------------------------
var noiseMain = function(){
_perlin = new SimplexNoise();
_n = Math.random() * 10;
_rangeHalf = (_opts.range_max - _opts.range_min) / 2;
for(var i = 0; i < _items.length; i++){
var v = getNoiseValue(_items[i]);
_items[i].resize(v, v,
_scaleOpt.changePositions,
_scaleOpt.changeFillPatterns,
_scaleOpt.changeFillGradients,
_scaleOpt.changeStrokePattern,
_scaleOpt.changeLineWidth,
_scaleOpt.scaleAbout
);
}
};
// -----------------------------------------------
var Point = function(x_, y_){
this.x = x_;
this.y = y_;
};
// -----------------------------------------------
var Rect = function(l, r, t, b){
this.left = l;
this.right = r;
this.top = t;
this.bottom = b;
this.width = r - l;
this.height = t - b;
};
// -----------------------------------------------
// generates noise value according to the coordinate of "item".
// returns "noiseValue": (_opts.range_min <= noiseValue <= _opts.range.max)
var getNoiseValue = function(item){ // item : PageItem
var center = getCenter(item);
var kx = (center.x - _rect.left) / _fullLength * _opts.noise_factor;
var ky = (center.y - _rect.bottom) / _fullLength * _opts.noise_factor;
var noiseValue = _perlin.noise(_n + kx, _n + ky) + 1; // 0 < . < 2
return noiseValue * _rangeHalf + _opts.range_min;
};
// -----------------------------------------------
var getCenter = function(item){
return new Point(item.left + item.width / 2,
item.top - item.height / 2);
};
// -----------------------------------------------
var getSelectedRect = function(sel){
var left = sel[0].left;
var right = left + sel[0].width;
var top = sel[0].top;
var bottom = sel[0].top - sel[0].height;
for(var i = 1; i < sel.length; i++){
var s = sel[i];
left = Math.min(left, s.left);
right = Math.max(right, s.left + s.width);
top = Math.max(top, s.top);
bottom = Math.min(bottom, s.top - s.height);
}
return new Rect(left, right, top, bottom);
};
// -----------------------------------------------
var extractPageItems = function(s, items){
for(var i = 0; i < s.length; i++){
if(s[i].typename == "GroupItem"){
extractPageItems(s[i].pageItems, items);
} else {
items.push(s[i]);
}
}
};
// -----------------------------------------------
main();
})();