illustrator插件-常用功能开发-直角圆角化-js脚本开发-AI插件

文章目录

1.算法程序
2.作者答疑

1.算法程序

illustrator是矢量编辑软件，画板是绘制处理的重要容器，在印刷方面的一个重要功能就是直角圆角化，开发一个直角圆角化功能，以下功能仅用于学习交流，请勿用于非法用途和商业用途，源代码如下所示：

// Round Any Corner
// rounds selected corners of PathItems.
// Especially for the corners at the intersection point of curves,
// this script may work better than "Round Corners" filter (but slower).// ## How To Use// ## Illustrator CS
//  1. Select the anchor(s) or whole path(es) to round.
//  2. Run this script. A prompt window appears to set the rounding radius.
//     Input the radius in point, then click OK.
//  #. You can choose a behavior like Illustrator10 by change the setting.
//     (-- see "setting" section below)// ## Illustrator 10
//  1. Select the anchor(s) or whole path(es) to round
//     WITH a foreground path that specifies the rounding radius.
//     Half width of foreground path is used for the radius. (excluding stroke width)
//     Using a circle is most suitable for intuitive understanding and ease of use.
//     The script asks you to continue if there's a difference greater than 1 pt
//     between width and height of foreground path.
//  2. Run this script.  The foreground path is removed after rounding.
//  #. When the number of selected path is 1, predefined radius is used
//     for rounding. (-- see "setting" section below)// ## Rounding Method
// Basically, the rounding method is compatible with the "Round Corners" filter.
// It is to add two anchors instead of the original anchor, at the points of
// specified line length from each selected corner.  So if there're too many
// anchors on original path, this script can not round nicely.// ## Radius
// Actually, the specified "radius" is not for a radius of arcs which drawn.
// It is for the line length from each selected corner and is for the base
// to compute the length of handles.  The reason calling it "radius" is
// for compatibility with the "Round Corners" filter.// This script does not round the corners which already rounded.
// (for example, select a circle and run this script does nothing)// ### notice
// In the rounding process, the script merges anchors which nearly
// overlapped (when the distance between anchors is less than 0.05 points).// This script does not work for some part of compound pathes.
// When this occurs, please select part of the compound path or release the compound path and
// select them, then run script again.
// I still have not figured out how to get properties from grouped pathes inside a compound path.// JavaScript Script for Adobe Illustrator CS3
// Tested with Adobe Illustrator CS3 13.0.3, Windows XP SP2 (Japanese version).
// This script provided "as is" without warranty of any kind.
// Free to use and distribute.// Change Log
// 2005-09-18 release on the web
// ...
// 2009-04-28 modified input part to accept unit and operator
// 2009-05-23 some refinementsvar PMSLibs = confirm("此脚本会将路径直角调整为圆角\n--只会调整直角，路径不受任何影响（非软件自带效果可比）");
var ver10 = (version.indexOf('10') == 0);roundAnyCorner();
function roundAnyCorner() {// setting ----------------------------------------------// -- rr : rounding radius ( unit : point )// ## on IllustratorCS, this value is for default value in prompt window.var rr = 10;// -- use_foreground_shape_to_set_radius// set this "true" to use half width of foreground path as rounding radius// instead of set the radius with prompt window.// ## on Illustrator10, this value is always true.var use_foreground_shape_to_set_radius = false; // set true or false// -- check_circle// when use_foreground_shape_to_set_radius = true, // setting this "true", the script asks you to continue if there's a difference// greater than 1 pt between width and height of foreground path.// it only checks difference between width and height.var check_circle = true;// ------------------------------------------------------if (ver10) use_foreground_shape_to_set_radius = true;var s = [];getPathItemsInSelection(1, s); // extract pathItems which pathpoints length is greater than 1if (s.length < 1) return;// When use half width of foreground path as rounding radiusif (use_foreground_shape_to_set_radius) {if (s.length < 2) {// case : the number of selected path is 1// ver10 -- round by predefined value// CS -- ask radius by prompt windowif (!ver10) use_foreground_shape_to_set_radius = false;} else {// case : the number of selected path > 1var pi = s.shift();      // remove foreground path from list of selectionvar rr2 = getRadius(pi, check_circle); // get half width of itif (rr2 < 0) return;if (rr2 > 0) {rr = rr2;pi.remove();           // remove the path} else {// case : the width of foreground path is 0// ver10 -- round by predefined value.  the foreground path remains.// CS -- ask radius by prompt window  the foreground path remains.if (!ver10) use_foreground_shape_to_set_radius = false;}}}if (!use_foreground_shape_to_set_radius) {rr = prompt("输入圆角半径\r-- 可以使用的单位有pt（默认）、mm、in\r-- 也可以进行四则运算（+ - * /）", rr); // input the radius;if (!rr) return;rr = rr.replace(/mm/ig, "*2.83464567");rr = rr.replace(/pt/ig, "");rr = rr.replace(/in/ig, "*72");rr = rr.replace(/\s+/g, "");try {var eval_rr = eval(rr);} catch (e) {alert("ERROR:\n" + e.description);return;}if (isNaN(eval_rr) || eval_rr <= 0) {alert("\n警告：错误的四则计算公式！计算结果必须为正值。");return;}rr = eval_rr;}//var tim = new Date();var p, op, pnts;var skipList, adjRdirAtEnd, redrawFlg;var i, nxi, pvi, q, d, ds, r, g, t, qb;var anc1, ldir1, rdir1, anc2, ldir2, rdir2;var hanLen = 4 * (Math.sqrt(2) - 1) / 3;var ptyp = PointType.SMOOTH;for (var j = 0; j < s.length; j++) {p = s[j].pathPoints;if (readjustAnchors(p) < 2) continue; // reduce anchorsop = !s[j].closed;pnts = op ? [getDat(p[0])] : [];redrawFlg = false;adjRdirAtEnd = 0;skipList = [(op || !isSelected(p[0]) || !isCorner(p, 0))];for (i = 1; i < p.length; i++) {skipList.push((!isSelected(p[i])|| !isCorner(p, i)|| (op && i == p.length - 1)));}for (i = 0; i < p.length; i++) {nxi = parseIdx(p, i + 1);if (nxi < 0) break;pvi = parseIdx(p, i - 1);q = [p[i].anchor, p[i].rightDirection,p[nxi].leftDirection, p[nxi].anchor];ds = dist(q[0], q[3]) / 2;if (arrEq(q[0], q[1]) && arrEq(q[2], q[3])) {  // straight sider = Math.min(ds, rr);g = getRad(q[0], q[3]);anc1 = getPnt(q[0], g, r);ldir1 = getPnt(anc1, g + Math.PI, r * hanLen);if (skipList[nxi]) {if (!skipList[i]) {pnts.push([anc1, anc1, ldir1, ptyp]);redrawFlg = true;}pnts.push(getDat(p[nxi]));} else {if (r < rr) {  // when the length of the side is less than rr * 2pnts.push([anc1,getPnt(anc1, getRad(ldir1, anc1), r * hanLen),ldir1,ptyp]);} else {if (!skipList[i]) pnts.push([anc1, anc1, ldir1, ptyp]);anc2 = getPnt(q[3], g + Math.PI, r);pnts.push([anc2,getPnt(anc2, g, r * hanLen),anc2,ptyp]);}redrawFlg = true;}} else {  // not straight sided = getT4Len(q, 0) / 2;r = Math.min(d, rr);t = getT4Len(q, r);anc1 = bezier(q, t);rdir1 = defHan(t, q, 1);ldir1 = getPnt(anc1, getRad(rdir1, anc1), r * hanLen);if (skipList[nxi]) {if (skipList[i]) {pnts.push(getDat(p[nxi]));} else {pnts.push([anc1, rdir1, ldir1, ptyp]);with (p[nxi]) pnts.push([anchor,rightDirection,adjHan(anchor, leftDirection, 1 - t),ptyp]);redrawFlg = true;}} else { // skipList[nxi] = falseif (r < rr) {  // the length of the side is less than rr * 2if (skipList[i]) {if (!op && i == 0) {adjRdirAtEnd = t;} else {pnts[pnts.length - 1][1] = adjHan(q[0], q[1], t);}pnts.push([anc1,getPnt(anc1, getRad(ldir1, anc1), r * hanLen),defHan(t, q, 0),ptyp]);} else {pnts.push([anc1,getPnt(anc1, getRad(ldir1, anc1), r * hanLen),ldir1,ptyp]);}} else {  // round the corner with the radius rrif (skipList[i]) {t = getT4Len(q, -r);anc2 = bezier(q, t);if (!op && i == 0) {adjRdirAtEnd = t;} else {pnts[pnts.length - 1][1] = adjHan(q[0], q[1], t);}ldir2 = defHan(t, q, 0);rdir2 = getPnt(anc2, getRad(ldir2, anc2), r * hanLen);pnts.push([anc2, rdir2, ldir2, ptyp]);} else {qb = [anc1, rdir1, adjHan(q[3], q[2], 1 - t), q[3]];t = getT4Len(qb, -r);anc2 = bezier(qb, t);ldir2 = defHan(t, qb, 0);rdir2 = getPnt(anc2, getRad(ldir2, anc2), r * hanLen);rdir1 = adjHan(anc1, rdir1, t);pnts.push([anc1, rdir1, ldir1, ptyp],[anc2, rdir2, ldir2, ptyp]);}}redrawFlg = true;}}}if (adjRdirAtEnd > 0) {pnts[pnts.length - 1][1] = adjHan(p[0].anchor, p[0].rightDirection, adjRdirAtEnd);}if (redrawFlg) {// redrawfor (i = p.length - 1; i > 0; i--) p[i].remove();for (i = 0; i < pnts.length; i++) {pt = i > 0 ? p.add() : p[0];with (pt) {anchor = pnts[i][0];rightDirection = pnts[i][1];leftDirection = pnts[i][2];pointType = pnts[i][3];}}}}activeDocument.selection = s;// alert(new Date() - tim);
}// ------------------------------------------------
function getRadius(pi, check_circle) {with (pi) {var gb = geometricBounds;var w = (gb[2] - gb[0]);var h = (gb[1] - gb[3]);if (check_circle && Math.abs(w - h) > 1&& !confirm("There's a difference between width and\n"+ "height of foreground path. Continue?")) {return -1;}return w / 2;}
}// ------------------------------------------------
// return [x,y] of the distance "len" and the angle "rad"(in radian)
// from "pt"=[x,y]
function getPnt(pt, rad, len) {return [pt[0] + Math.cos(rad) * len,pt[1] + Math.sin(rad) * len];
}// ------------------------------------------------
// return the [x, y] coordinate of the handle of the point on the bezier curve
// that corresponds to the parameter "t"
// n=0:leftDir, n=1:rightDir
function defHan(t, q, n) {return [t * (t * (q[n][0] - 2 * q[n + 1][0] + q[n + 2][0]) + 2 * (q[n + 1][0] - q[n][0])) + q[n][0],t * (t * (q[n][1] - 2 * q[n + 1][1] + q[n + 2][1]) + 2 * (q[n + 1][1] - q[n][1])) + q[n][1]];
}// -----------------------------------------------
// return the [x, y] coordinate on the bezier curve
// that corresponds to the paramter "t"
function bezier(q, t) {var u = 1 - t;return [u * u * u * q[0][0] + 3 * u * t * (u * q[1][0] + t * q[2][0]) + t * t * t * q[3][0],u * u * u * q[0][1] + 3 * u * t * (u * q[1][1] + t * q[2][1]) + t * t * t * q[3][1]];
}// ------------------------------------------------
// adjust the length of the handle "dir"
// by the magnification ratio "m",
// returns the modified [x, y] coordinate of the handle
// "anc" is the anchor [x, y]
function adjHan(anc, dir, m) {return [anc[0] + (dir[0] - anc[0]) * m,anc[1] + (dir[1] - anc[1]) * m];
}// ------------------------------------------------
// return true if the pathPoints "p[idx]" is a corner
function isCorner(p, idx) {var pnt0 = getAnglePnt(p, idx, -1);var pnt1 = getAnglePnt(p, idx, 1);if (!pnt0 || !pnt1) return false;                    // at the end of a open-pathif (pnt0.length < 1 || pnt1.length < 1) return false;   // anchor is overlapping, so cannot determine the anglevar rad = getRad2(pnt0, p[idx].anchor, pnt1, true);if (rad > Math.PI - 0.1) return false;   // set the angle tolerance herereturn true;
}// ------------------------------------------------
// "p"=pathPoints, "idx1"=index of pathpoint
// "dir" = -1, returns previous point [x,y] to get the angle of tangent at pathpoints[idx1]
// "dir" =  1, returns next ...
function getAnglePnt(p, idx1, dir) {if (!dir) dir = -1;var idx2 = parseIdx(p, idx1 + dir);if (idx2 < 0) return null;  // at the end of a open-pathvar p2 = p[idx2];with (p[idx1]) {if (dir < 0) {if (arrEq(leftDirection, anchor)) {if (arrEq(p2.anchor, anchor)) return [];if (arrEq(p2.anchor, p2.rightDirection)|| arrEq(p2.rightDirection, anchor)) return p2.anchor;else return p2.rightDirection;} else {return leftDirection;}} else {if (arrEq(anchor, rightDirection)) {if (arrEq(anchor, p2.anchor)) return [];if (arrEq(p2.anchor, p2.leftDirection)|| arrEq(anchor, p2.leftDirection)) return p2.anchor;else return p2.leftDirection;} else {return rightDirection;}}}
}// --------------------------------------
// if the contents of both arrays are equal, return true (lengthes must be same)
function arrEq(arr1, arr2) {for (var i = 0; i < arr1.length; i++) {if (arr1[i] != arr2[i]) return false;}return true;
}// ------------------------------------------------
// return the distance between p1=[x,y] and p2=[x,y]
function dist(p1, p2) {return Math.sqrt(Math.pow(p1[0] - p2[0], 2)+ Math.pow(p1[1] - p2[1], 2));
}// ------------------------------------------------
// return the squared distance between p1=[x,y] and p2=[x,y]
function dist2(p1, p2) {return Math.pow(p1[0] - p2[0], 2)+ Math.pow(p1[1] - p2[1], 2);
}// --------------------------------------
// return the angle in radian
// of the line drawn from p1=[x,y] from p2
function getRad(p1, p2) {return Math.atan2(p2[1] - p1[1],p2[0] - p1[0]);
}// --------------------------------------
// return the angle between two line segments
// o-p1 and o-p2 ( 0 - Math.PI)
function getRad2(p1, o, p2) {var v1 = normalize(p1, o);var v2 = normalize(p2, o);return Math.acos(v1[0] * v2[0] + v1[1] * v2[1]);
}// ------------------------------------------------
function normalize(p, o) {var d = dist(p, o);return d == 0 ? [0, 0] : [(p[0] - o[0]) / d,(p[1] - o[1]) / d];
}// ------------------------------------------------
// return the bezier curve parameter "t"
// at the point which the length of the bezier curve segment
// (from the point start drawing) is "len"
// when "len" is 0, return the length of whole this segment.
function getT4Len(q, len) {var m = [q[3][0] - q[0][0] + 3 * (q[1][0] - q[2][0]),q[0][0] - 2 * q[1][0] + q[2][0],q[1][0] - q[0][0]];var n = [q[3][1] - q[0][1] + 3 * (q[1][1] - q[2][1]),q[0][1] - 2 * q[1][1] + q[2][1],q[1][1] - q[0][1]];var k = [m[0] * m[0] + n[0] * n[0],4 * (m[0] * m[1] + n[0] * n[1]),2 * ((m[0] * m[2] + n[0] * n[2]) + 2 * (m[1] * m[1] + n[1] * n[1])),4 * (m[1] * m[2] + n[1] * n[2]),m[2] * m[2] + n[2] * n[2]];var fullLen = getLength(k, 1);if (len == 0) {return fullLen;} else if (len < 0) {len += fullLen;if (len < 0) return 0;} else if (len > fullLen) {return 1;}var t, d;var t0 = 0;var t1 = 1;var torelance = 0.001;for (var h = 1; h < 30; h++) {t = t0 + (t1 - t0) / 2;d = len - getLength(k, t);if (Math.abs(d) < torelance) break;else if (d < 0) t1 = t;else t0 = t;}return t;
}// ------------------------------------------------
// return the length of bezier curve segment
// in range of parameter from 0 to "t"
function getLength(k, t) {var h = t / 128;var hh = h * 2;var fc = function (t, k) {return Math.sqrt(t * (t * (t * (t * k[0] + k[1]) + k[2]) + k[3]) + k[4]) || 0};var total = (fc(0, k) - fc(t, k)) / 2;for (var i = h; i < t; i += hh) total += 2 * fc(i, k) + fc(i + h, k);return total * hh;
}// ------------------------------------------------
// extract PathItems from the selection which length of PathPoints
// is greater than "n"
function getPathItemsInSelection(n, pathes) {if (documents.length < 1) return;var s = activeDocument.selection;if (!(s instanceof Array) || s.length < 1) return;extractPathes(s, n, pathes);
}// --------------------------------------
// extract PathItems from "s" (Array of PageItems -- ex. selection),
// and put them into an Array "pathes".  If "pp_length_limit" is specified,
// this function extracts PathItems which PathPoints length is greater
// than this number.
function extractPathes(s, pp_length_limit, pathes) {for (var i = 0; i < s.length; i++) {if (s[i].typename == "PathItem") {if (pp_length_limit&& s[i].pathPoints.length <= pp_length_limit) {continue;}pathes.push(s[i]);} else if (s[i].typename == "GroupItem") {// search for PathItems in GroupItem, recursivelyextractPathes(s[i].pageItems, pp_length_limit, pathes);} else if (s[i].typename == "CompoundPathItem") {// searches for pathitems in CompoundPathItem, recursively// ( ### Grouped PathItems in CompoundPathItem are ignored ### )extractPathes(s[i].pathItems, pp_length_limit, pathes);}}
}// --------------------------------------
// merge nearly overlapped anchor points
// return the length of pathpoints after merging
function readjustAnchors(p) {// Settings ==========================// merge the anchor points when the distance between// 2 points is within ### square root ### of this value (in point)var minDist = 0.0025;// ===================================if (p.length < 2) return 1;var i;if (p.parent.closed) {for (i = p.length - 1; i >= 1; i--) {if (dist2(p[0].anchor, p[i].anchor) < minDist) {p[0].leftDirection = p[i].leftDirection;p[i].remove();} else {break;}}}for (i = p.length - 1; i >= 1; i--) {if (dist2(p[i].anchor, p[i - 1].anchor) < minDist) {p[i - 1].rightDirection = p[i].rightDirection;p[i].remove();}}return p.length;
}// -----------------------------------------------
// return pathpoint's index. when the argument is out of bounds,
// fixes it if the path is closed (ex. next of last index is 0),
// or return -1 if the path is not closed.
function parseIdx(p, n) { // PathPoints, number for indexvar len = p.length;if (p.parent.closed) {return n >= 0 ? n % len : len - Math.abs(n % len);} else {return (n < 0 || n > len - 1) ? -1 : n;}
}// -----------------------------------------------
function getDat(p) { // pathPointwith (p) return [anchor, rightDirection, leftDirection, pointType];
}// -----------------------------------------------
function isSelected(p) { // PathPointreturn p.selected == PathPointSelection.ANCHORPOINT;
}

2.作者答疑

如有疑问，请留言。

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illustrator插件-常用功能开发-直角圆角化-js脚本开发-AI插件

文章目录

1.算法程序

2.作者答疑

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