mirror of
https://github.com/rough-stuff/rough.git
synced 2026-04-22 03:00:28 -04:00
e5372d11ae
* . * fix for solid arc fill when arc angle is > 180 * fix dot rendering when roughness < 1 * fix rounding error when computing ellipse points
491 lines
17 KiB
TypeScript
491 lines
17 KiB
TypeScript
import { ResolvedOptions, Op, OpSet } from './core.js';
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import { Point } from './geometry.js';
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import { getFiller } from './fillers/filler.js';
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import { RenderHelper } from './fillers/filler-interface.js';
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import { Random } from './math.js';
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import { parsePath, normalize, absolutize } from 'path-data-parser';
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interface EllipseParams {
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rx: number;
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ry: number;
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increment: number;
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}
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const helper: RenderHelper = {
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randOffset,
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randOffsetWithRange,
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ellipse,
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doubleLineOps: doubleLineFillOps,
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};
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export function line(x1: number, y1: number, x2: number, y2: number, o: ResolvedOptions): OpSet {
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return { type: 'path', ops: _doubleLine(x1, y1, x2, y2, o) };
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}
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export function linearPath(points: Point[], close: boolean, o: ResolvedOptions): OpSet {
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const len = (points || []).length;
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if (len > 2) {
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const ops: Op[] = [];
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for (let i = 0; i < (len - 1); i++) {
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ops.push(..._doubleLine(points[i][0], points[i][1], points[i + 1][0], points[i + 1][1], o));
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}
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if (close) {
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ops.push(..._doubleLine(points[len - 1][0], points[len - 1][1], points[0][0], points[0][1], o));
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}
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return { type: 'path', ops };
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} else if (len === 2) {
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return line(points[0][0], points[0][1], points[1][0], points[1][1], o);
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}
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return { type: 'path', ops: [] };
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}
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export function polygon(points: Point[], o: ResolvedOptions): OpSet {
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return linearPath(points, true, o);
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}
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export function rectangle(x: number, y: number, width: number, height: number, o: ResolvedOptions): OpSet {
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const points: Point[] = [
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[x, y],
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[x + width, y],
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[x + width, y + height],
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[x, y + height],
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];
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return polygon(points, o);
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}
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export function curve(points: Point[], o: ResolvedOptions): OpSet {
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let o1 = _curveWithOffset(points, 1 * (1 + o.roughness * 0.2), o);
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if (!o.disableMultiStroke) {
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const o2 = _curveWithOffset(points, 1.5 * (1 + o.roughness * 0.22), cloneOptionsAlterSeed(o));
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o1 = o1.concat(o2);
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}
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return { type: 'path', ops: o1 };
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}
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export interface EllipseResult {
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opset: OpSet;
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estimatedPoints: Point[];
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}
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export function ellipse(x: number, y: number, width: number, height: number, o: ResolvedOptions): OpSet {
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const params = generateEllipseParams(width, height, o);
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return ellipseWithParams(x, y, o, params).opset;
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}
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export function generateEllipseParams(width: number, height: number, o: ResolvedOptions): EllipseParams {
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const psq = Math.sqrt(Math.PI * 2 * Math.sqrt((Math.pow(width / 2, 2) + Math.pow(height / 2, 2)) / 2));
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const stepCount = Math.ceil(Math.max(o.curveStepCount, (o.curveStepCount / Math.sqrt(200)) * psq));
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const increment = (Math.PI * 2) / stepCount;
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let rx = Math.abs(width / 2);
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let ry = Math.abs(height / 2);
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const curveFitRandomness = 1 - o.curveFitting;
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rx += _offsetOpt(rx * curveFitRandomness, o);
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ry += _offsetOpt(ry * curveFitRandomness, o);
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return { increment, rx, ry };
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}
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export function ellipseWithParams(x: number, y: number, o: ResolvedOptions, ellipseParams: EllipseParams): EllipseResult {
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const [ap1, cp1] = _computeEllipsePoints(ellipseParams.increment, x, y, ellipseParams.rx, ellipseParams.ry, 1, ellipseParams.increment * _offset(0.1, _offset(0.4, 1, o), o), o);
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let o1 = _curve(ap1, null, o);
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if ((!o.disableMultiStroke) && (o.roughness !== 0)) {
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const [ap2] = _computeEllipsePoints(ellipseParams.increment, x, y, ellipseParams.rx, ellipseParams.ry, 1.5, 0, o);
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const o2 = _curve(ap2, null, o);
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o1 = o1.concat(o2);
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}
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return {
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estimatedPoints: cp1,
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opset: { type: 'path', ops: o1 },
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};
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}
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export function arc(x: number, y: number, width: number, height: number, start: number, stop: number, closed: boolean, roughClosure: boolean, o: ResolvedOptions): OpSet {
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const cx = x;
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const cy = y;
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let rx = Math.abs(width / 2);
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let ry = Math.abs(height / 2);
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rx += _offsetOpt(rx * 0.01, o);
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ry += _offsetOpt(ry * 0.01, o);
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let strt = start;
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let stp = stop;
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while (strt < 0) {
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strt += Math.PI * 2;
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stp += Math.PI * 2;
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}
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if ((stp - strt) > (Math.PI * 2)) {
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strt = 0;
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stp = Math.PI * 2;
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}
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const ellipseInc = (Math.PI * 2) / o.curveStepCount;
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const arcInc = Math.min(ellipseInc / 2, (stp - strt) / 2);
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const ops = _arc(arcInc, cx, cy, rx, ry, strt, stp, 1, o);
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if (!o.disableMultiStroke) {
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const o2 = _arc(arcInc, cx, cy, rx, ry, strt, stp, 1.5, o);
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ops.push(...o2);
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}
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if (closed) {
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if (roughClosure) {
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ops.push(
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..._doubleLine(cx, cy, cx + rx * Math.cos(strt), cy + ry * Math.sin(strt), o),
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..._doubleLine(cx, cy, cx + rx * Math.cos(stp), cy + ry * Math.sin(stp), o)
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);
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} else {
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ops.push(
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{ op: 'lineTo', data: [cx, cy] },
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{ op: 'lineTo', data: [cx + rx * Math.cos(strt), cy + ry * Math.sin(strt)] }
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);
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}
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}
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return { type: 'path', ops };
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}
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export function svgPath(path: string, o: ResolvedOptions): OpSet {
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const segments = normalize(absolutize(parsePath(path)));
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const ops: Op[] = [];
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let first: Point = [0, 0];
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let current: Point = [0, 0];
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for (const { key, data } of segments) {
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switch (key) {
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case 'M': {
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const ro = 1 * (o.maxRandomnessOffset || 0);
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const pv = o.preserveVertices;
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ops.push({ op: 'move', data: data.map((d) => d + (pv ? 0 : _offsetOpt(ro, o))) });
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current = [data[0], data[1]];
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first = [data[0], data[1]];
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break;
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}
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case 'L':
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ops.push(..._doubleLine(current[0], current[1], data[0], data[1], o));
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current = [data[0], data[1]];
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break;
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case 'C': {
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const [x1, y1, x2, y2, x, y] = data;
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ops.push(..._bezierTo(x1, y1, x2, y2, x, y, current, o));
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current = [x, y];
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break;
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}
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case 'Z':
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ops.push(..._doubleLine(current[0], current[1], first[0], first[1], o));
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current = [first[0], first[1]];
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break;
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}
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}
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return { type: 'path', ops };
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}
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// Fills
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export function solidFillPolygon(polygonList: Point[][], o: ResolvedOptions): OpSet {
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const ops: Op[] = [];
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for (const points of polygonList) {
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if (points.length) {
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const offset = o.maxRandomnessOffset || 0;
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const len = points.length;
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if (len > 2) {
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ops.push({ op: 'move', data: [points[0][0] + _offsetOpt(offset, o), points[0][1] + _offsetOpt(offset, o)] });
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for (let i = 1; i < len; i++) {
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ops.push({ op: 'lineTo', data: [points[i][0] + _offsetOpt(offset, o), points[i][1] + _offsetOpt(offset, o)] });
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}
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}
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}
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}
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return { type: 'fillPath', ops };
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}
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export function patternFillPolygons(polygonList: Point[][], o: ResolvedOptions): OpSet {
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return getFiller(o, helper).fillPolygons(polygonList, o);
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}
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export function patternFillArc(x: number, y: number, width: number, height: number, start: number, stop: number, o: ResolvedOptions): OpSet {
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const cx = x;
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const cy = y;
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let rx = Math.abs(width / 2);
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let ry = Math.abs(height / 2);
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rx += _offsetOpt(rx * 0.01, o);
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ry += _offsetOpt(ry * 0.01, o);
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let strt = start;
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let stp = stop;
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while (strt < 0) {
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strt += Math.PI * 2;
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stp += Math.PI * 2;
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}
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if ((stp - strt) > (Math.PI * 2)) {
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strt = 0;
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stp = Math.PI * 2;
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}
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const increment = (stp - strt) / o.curveStepCount;
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const points: Point[] = [];
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for (let angle = strt; angle <= stp; angle = angle + increment) {
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points.push([cx + rx * Math.cos(angle), cy + ry * Math.sin(angle)]);
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}
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points.push([cx + rx * Math.cos(stp), cy + ry * Math.sin(stp)]);
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points.push([cx, cy]);
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return patternFillPolygons([points], o);
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}
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export function randOffset(x: number, o: ResolvedOptions): number {
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return _offsetOpt(x, o);
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}
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export function randOffsetWithRange(min: number, max: number, o: ResolvedOptions): number {
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return _offset(min, max, o);
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}
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export function doubleLineFillOps(x1: number, y1: number, x2: number, y2: number, o: ResolvedOptions): Op[] {
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return _doubleLine(x1, y1, x2, y2, o, true);
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}
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// Private helpers
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function cloneOptionsAlterSeed(ops: ResolvedOptions): ResolvedOptions {
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const result: ResolvedOptions = { ...ops };
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result.randomizer = undefined;
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if (ops.seed) {
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result.seed = ops.seed + 1;
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}
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return result;
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}
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function random(ops: ResolvedOptions): number {
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if (!ops.randomizer) {
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ops.randomizer = new Random(ops.seed || 0);
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}
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return ops.randomizer.next();
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}
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function _offset(min: number, max: number, ops: ResolvedOptions, roughnessGain = 1): number {
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return ops.roughness * roughnessGain * ((random(ops) * (max - min)) + min);
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}
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function _offsetOpt(x: number, ops: ResolvedOptions, roughnessGain = 1): number {
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return _offset(-x, x, ops, roughnessGain);
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}
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function _doubleLine(x1: number, y1: number, x2: number, y2: number, o: ResolvedOptions, filling = false): Op[] {
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const singleStroke = filling ? o.disableMultiStrokeFill : o.disableMultiStroke;
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const o1 = _line(x1, y1, x2, y2, o, true, false);
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if (singleStroke) {
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return o1;
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}
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const o2 = _line(x1, y1, x2, y2, o, true, true);
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return o1.concat(o2);
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}
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function _line(x1: number, y1: number, x2: number, y2: number, o: ResolvedOptions, move: boolean, overlay: boolean): Op[] {
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const lengthSq = Math.pow((x1 - x2), 2) + Math.pow((y1 - y2), 2);
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const length = Math.sqrt(lengthSq);
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let roughnessGain = 1;
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if (length < 200) {
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roughnessGain = 1;
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} else if (length > 500) {
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roughnessGain = 0.4;
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} else {
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roughnessGain = (-0.0016668) * length + 1.233334;
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}
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let offset = o.maxRandomnessOffset || 0;
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if ((offset * offset * 100) > lengthSq) {
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offset = length / 10;
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}
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const halfOffset = offset / 2;
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const divergePoint = 0.2 + random(o) * 0.2;
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let midDispX = o.bowing * o.maxRandomnessOffset * (y2 - y1) / 200;
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let midDispY = o.bowing * o.maxRandomnessOffset * (x1 - x2) / 200;
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midDispX = _offsetOpt(midDispX, o, roughnessGain);
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midDispY = _offsetOpt(midDispY, o, roughnessGain);
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const ops: Op[] = [];
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const randomHalf = () => _offsetOpt(halfOffset, o, roughnessGain);
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const randomFull = () => _offsetOpt(offset, o, roughnessGain);
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const preserveVertices = o.preserveVertices;
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if (move) {
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if (overlay) {
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ops.push({
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op: 'move', data: [
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x1 + (preserveVertices ? 0 : randomHalf()),
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y1 + (preserveVertices ? 0 : randomHalf()),
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],
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});
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} else {
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ops.push({
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op: 'move', data: [
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x1 + (preserveVertices ? 0 : _offsetOpt(offset, o, roughnessGain)),
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y1 + (preserveVertices ? 0 : _offsetOpt(offset, o, roughnessGain)),
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],
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});
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}
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}
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if (overlay) {
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ops.push({
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op: 'bcurveTo',
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data: [
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midDispX + x1 + (x2 - x1) * divergePoint + randomHalf(),
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midDispY + y1 + (y2 - y1) * divergePoint + randomHalf(),
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midDispX + x1 + 2 * (x2 - x1) * divergePoint + randomHalf(),
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midDispY + y1 + 2 * (y2 - y1) * divergePoint + randomHalf(),
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x2 + (preserveVertices ? 0 : randomHalf()),
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y2 + (preserveVertices ? 0 : randomHalf()),
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],
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});
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} else {
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ops.push({
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op: 'bcurveTo',
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data: [
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midDispX + x1 + (x2 - x1) * divergePoint + randomFull(),
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midDispY + y1 + (y2 - y1) * divergePoint + randomFull(),
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midDispX + x1 + 2 * (x2 - x1) * divergePoint + randomFull(),
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midDispY + y1 + 2 * (y2 - y1) * divergePoint + randomFull(),
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x2 + (preserveVertices ? 0 : randomFull()),
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y2 + (preserveVertices ? 0 : randomFull()),
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],
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});
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}
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return ops;
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}
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function _curveWithOffset(points: Point[], offset: number, o: ResolvedOptions): Op[] {
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const ps: Point[] = [];
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ps.push([
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points[0][0] + _offsetOpt(offset, o),
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points[0][1] + _offsetOpt(offset, o),
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]);
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ps.push([
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points[0][0] + _offsetOpt(offset, o),
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points[0][1] + _offsetOpt(offset, o),
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]);
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for (let i = 1; i < points.length; i++) {
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ps.push([
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points[i][0] + _offsetOpt(offset, o),
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points[i][1] + _offsetOpt(offset, o),
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]);
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if (i === (points.length - 1)) {
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ps.push([
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points[i][0] + _offsetOpt(offset, o),
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points[i][1] + _offsetOpt(offset, o),
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]);
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}
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}
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return _curve(ps, null, o);
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}
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function _curve(points: Point[], closePoint: Point | null, o: ResolvedOptions): Op[] {
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const len = points.length;
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const ops: Op[] = [];
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if (len > 3) {
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const b = [];
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const s = 1 - o.curveTightness;
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ops.push({ op: 'move', data: [points[1][0], points[1][1]] });
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for (let i = 1; (i + 2) < len; i++) {
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const cachedVertArray = points[i];
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b[0] = [cachedVertArray[0], cachedVertArray[1]];
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b[1] = [cachedVertArray[0] + (s * points[i + 1][0] - s * points[i - 1][0]) / 6, cachedVertArray[1] + (s * points[i + 1][1] - s * points[i - 1][1]) / 6];
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b[2] = [points[i + 1][0] + (s * points[i][0] - s * points[i + 2][0]) / 6, points[i + 1][1] + (s * points[i][1] - s * points[i + 2][1]) / 6];
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b[3] = [points[i + 1][0], points[i + 1][1]];
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ops.push({ op: 'bcurveTo', data: [b[1][0], b[1][1], b[2][0], b[2][1], b[3][0], b[3][1]] });
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}
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if (closePoint && closePoint.length === 2) {
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const ro = o.maxRandomnessOffset;
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ops.push({ op: 'lineTo', data: [closePoint[0] + _offsetOpt(ro, o), closePoint[1] + _offsetOpt(ro, o)] });
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}
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} else if (len === 3) {
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ops.push({ op: 'move', data: [points[1][0], points[1][1]] });
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ops.push({
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op: 'bcurveTo',
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data: [
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points[1][0], points[1][1],
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points[2][0], points[2][1],
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points[2][0], points[2][1],
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],
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});
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} else if (len === 2) {
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ops.push(..._doubleLine(points[0][0], points[0][1], points[1][0], points[1][1], o));
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}
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return ops;
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}
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function _computeEllipsePoints(increment: number, cx: number, cy: number, rx: number, ry: number, offset: number, overlap: number, o: ResolvedOptions): Point[][] {
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const corePoints: Point[] = [];
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const allPoints: Point[] = [];
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const radOffset = _offsetOpt(0.5, o) - (Math.PI / 2);
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const coreOnly = o.roughness === 0;
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if (!coreOnly) {
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allPoints.push([
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_offsetOpt(offset, o) + cx + 0.9 * rx * Math.cos(radOffset - increment),
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_offsetOpt(offset, o) + cy + 0.9 * ry * Math.sin(radOffset - increment),
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]);
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}
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const endAngle = Math.PI * 2 + (coreOnly ? 0 : (radOffset - 0.01));
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for (let angle = radOffset; angle < endAngle; angle = angle + increment) {
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const p: Point = [
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_offsetOpt(offset, o) + cx + rx * Math.cos(angle),
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_offsetOpt(offset, o) + cy + ry * Math.sin(angle),
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];
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corePoints.push(p);
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allPoints.push(p);
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}
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if (!coreOnly) {
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allPoints.push([
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_offsetOpt(offset, o) + cx + rx * Math.cos(radOffset + Math.PI * 2 + overlap * 0.5),
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_offsetOpt(offset, o) + cy + ry * Math.sin(radOffset + Math.PI * 2 + overlap * 0.5),
|
|
]);
|
|
allPoints.push([
|
|
_offsetOpt(offset, o) + cx + 0.98 * rx * Math.cos(radOffset + overlap),
|
|
_offsetOpt(offset, o) + cy + 0.98 * ry * Math.sin(radOffset + overlap),
|
|
]);
|
|
allPoints.push([
|
|
_offsetOpt(offset, o) + cx + 0.9 * rx * Math.cos(radOffset + overlap * 0.5),
|
|
_offsetOpt(offset, o) + cy + 0.9 * ry * Math.sin(radOffset + overlap * 0.5),
|
|
]);
|
|
}
|
|
|
|
return [allPoints, corePoints];
|
|
}
|
|
|
|
function _arc(increment: number, cx: number, cy: number, rx: number, ry: number, strt: number, stp: number, offset: number, o: ResolvedOptions) {
|
|
const radOffset = strt + _offsetOpt(0.1, o);
|
|
const points: Point[] = [];
|
|
points.push([
|
|
_offsetOpt(offset, o) + cx + 0.9 * rx * Math.cos(radOffset - increment),
|
|
_offsetOpt(offset, o) + cy + 0.9 * ry * Math.sin(radOffset - increment),
|
|
]);
|
|
for (let angle = radOffset; angle <= stp; angle = angle + increment) {
|
|
points.push([
|
|
_offsetOpt(offset, o) + cx + rx * Math.cos(angle),
|
|
_offsetOpt(offset, o) + cy + ry * Math.sin(angle),
|
|
]);
|
|
}
|
|
points.push([
|
|
cx + rx * Math.cos(stp),
|
|
cy + ry * Math.sin(stp),
|
|
]);
|
|
points.push([
|
|
cx + rx * Math.cos(stp),
|
|
cy + ry * Math.sin(stp),
|
|
]);
|
|
return _curve(points, null, o);
|
|
}
|
|
|
|
function _bezierTo(x1: number, y1: number, x2: number, y2: number, x: number, y: number, current: Point, o: ResolvedOptions): Op[] {
|
|
const ops: Op[] = [];
|
|
const ros = [o.maxRandomnessOffset || 1, (o.maxRandomnessOffset || 1) + 0.3];
|
|
let f: Point = [0, 0];
|
|
const iterations = o.disableMultiStroke ? 1 : 2;
|
|
const preserveVertices = o.preserveVertices;
|
|
for (let i = 0; i < iterations; i++) {
|
|
if (i === 0) {
|
|
ops.push({ op: 'move', data: [current[0], current[1]] });
|
|
} else {
|
|
ops.push({ op: 'move', data: [current[0] + (preserveVertices ? 0 : _offsetOpt(ros[0], o)), current[1] + (preserveVertices ? 0 : _offsetOpt(ros[0], o))] });
|
|
}
|
|
f = preserveVertices ? [x, y] : [x + _offsetOpt(ros[i], o), y + _offsetOpt(ros[i], o)];
|
|
ops.push({
|
|
op: 'bcurveTo',
|
|
data: [
|
|
x1 + _offsetOpt(ros[i], o), y1 + _offsetOpt(ros[i], o),
|
|
x2 + _offsetOpt(ros[i], o), y2 + _offsetOpt(ros[i], o),
|
|
f[0], f[1],
|
|
],
|
|
});
|
|
}
|
|
return ops;
|
|
}
|