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c9beae7ef329a0c09419ae04f277b2ffc0f83037
create/src/Mod/TechDraw/Gui/PathBuilder.cpp
WandererFan 50f970efd7 [TD]Cosmetic function overhaul (#14216) 
* [TD]Cosmetic geometry and tools update

- all cosmetics to store geometry in same form
- all cosmetics to survive scaling and rotation
- extension functions to survive scaling and rotation

* [TD]overhaul leader point storage and editing

- add py routine makeLeader(points)

* [TD]add leader conversion utility

* [TD]Set Leader RotateWithView default to true

* [TD]fix intersection vertex position

* [TD]add CosmeticEdge::makeLineFromCanonicalPoints

* [TD]fix 2 Extension tools

- positioning in DrawCosmeticCircle
- mishandling of points in execLineParallelPerpendicular

* [TD]Remove duplicate constexpr

* [TD]fix 2x Cosmetic arc tools

* [TD]refactor LineFormat out of Cosmetic

* [TD]move cosmetic appearance settings to LineFormat

* [TD]remove 2 unused methods

* [TD]apply format to blue line & circle tools

* [TD]fix ballon arrowhead does not rotate with view

* [TD]fix CosmeticCircle3Points

* [TD]allow multiple cosmetic object deletions

* [TD]fix extend/shorten centerline
2024-05-23 09:41:42 -04:00

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/***************************************************************************
* Copyright (c) 2023 WandererFan <wandererfan@gmail.com> *
* *
* This file is part of the FreeCAD CAx development system. *
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License as published by the Free Software Foundation; either *
* version 2 of the License, or (at your option) any later version. *
* *
* This library is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Library General Public License for more details. *
* *
* You should have received a copy of the GNU Library General Public *
* License along with this library; see the file COPYING.LIB. If not, *
* write to the Free Software Foundation, Inc., 59 Temple Place, *
* Suite 330, Boston, MA 02111-1307, USA *
* *
***************************************************************************/
#include "PreCompiled.h"
#ifndef _PreComp_
#include <qmath.h>
#endif
#include <Base/Console.h>
#include "PathBuilder.h"
#include "Rez.h"
using namespace TechDraw;
using namespace TechDrawGui;
QPainterPath PathBuilder::geomToPainterPath(BaseGeomPtr baseGeom, double rot) const
{
Q_UNUSED(rot);
QPainterPath path;
if (!baseGeom)
return path;
switch (baseGeom->getGeomType()) {
case CIRCLE: {
TechDraw::CirclePtr geom = std::static_pointer_cast<TechDraw::Circle>(baseGeom);
double x = geom->center.x - geom->radius;
double y = geom->center.y - geom->radius;
path.addEllipse(Rez::guiX(x), Rez::guiX(y), Rez::guiX(geom->radius * 2),
Rez::guiX(geom->radius * 2));//topleft@(x, y) radx, rady
} break;
case ARCOFCIRCLE: {
TechDraw::AOCPtr geom = std::static_pointer_cast<TechDraw::AOC>(baseGeom);
if (baseGeom->getReversed()) { // OCC reversed flag
path.moveTo(Rez::guiX(geom->endPnt.x), Rez::guiX(geom->endPnt.y));
pathArc(path, Rez::guiX(geom->radius), Rez::guiX(geom->radius), 0.,
geom->largeArc, // >180?
!geom->cw, // calculated from start and end angle not occ edge
Rez::guiX(geom->startPnt.x), Rez::guiX(geom->startPnt.y),
Rez::guiX(geom->endPnt.x), Rez::guiX(geom->endPnt.y));
}
else {
path.moveTo(Rez::guiX(geom->startPnt.x), Rez::guiX(geom->startPnt.y));
pathArc(path, Rez::guiX(geom->radius), Rez::guiX(geom->radius), 0., geom->largeArc,
geom->cw, Rez::guiX(geom->endPnt.x), Rez::guiX(geom->endPnt.y),
Rez::guiX(geom->startPnt.x), Rez::guiX(geom->startPnt.y));
}
} break;
case TechDraw::ELLIPSE: {
TechDraw::AOEPtr geom = std::static_pointer_cast<TechDraw::AOE>(baseGeom);
// Calculate start and end points as ellipse with theta = 0 and pi
double startX = geom->center.x + geom->major * cos(geom->angle),
startY = geom->center.y + geom->major * sin(geom->angle),
endX = geom->center.x - geom->major * cos(geom->angle),
endY = geom->center.y - geom->major * sin(geom->angle);
pathArc(path, Rez::guiX(geom->major), Rez::guiX(geom->minor), geom->angle, false, false,
Rez::guiX(endX), Rez::guiX(endY), Rez::guiX(startX), Rez::guiX(startY));
pathArc(path, Rez::guiX(geom->major), Rez::guiX(geom->minor), geom->angle, false, false,
Rez::guiX(startX), Rez::guiX(startY), Rez::guiX(endX), Rez::guiX(endY));
} break;
case TechDraw::ARCOFELLIPSE: {
TechDraw::AOEPtr geom = std::static_pointer_cast<TechDraw::AOE>(baseGeom);
if (baseGeom->getReversed()) {
path.moveTo(Rez::guiX(geom->endPnt.x), Rez::guiX(geom->endPnt.y));
pathArc(path, Rez::guiX(geom->major), Rez::guiX(geom->minor), geom->angle,
geom->largeArc, !geom->cw, Rez::guiX(geom->startPnt.x),
Rez::guiX(geom->startPnt.y), Rez::guiX(geom->endPnt.x),
Rez::guiX(geom->endPnt.y));
}
else {
path.moveTo(Rez::guiX(geom->startPnt.x), Rez::guiX(geom->startPnt.y));
pathArc(path, Rez::guiX(geom->major), Rez::guiX(geom->minor), geom->angle,
geom->largeArc, geom->cw, Rez::guiX(geom->endPnt.x),
Rez::guiX(geom->endPnt.y), Rez::guiX(geom->startPnt.x),
Rez::guiX(geom->startPnt.y));
}
} break;
case TechDraw::BEZIER: {
TechDraw::BezierSegmentPtr geom =
std::static_pointer_cast<TechDraw::BezierSegment>(baseGeom);
if (baseGeom->getReversed()) {
if (!geom->pnts.empty()) {
Base::Vector3d rStart = geom->pnts.back();
path.moveTo(Rez::guiX(rStart.x), Rez::guiX(rStart.y));
}
if (geom->poles == 2) {
// Degree 1 bezier = straight line...
path.lineTo(Rez::guiX(geom->pnts[0].x), Rez::guiX(geom->pnts[0].y));
}
else if (geom->poles == 3) {
path.quadTo(Rez::guiX(geom->pnts[1].x), Rez::guiX(geom->pnts[1].y),
Rez::guiX(geom->pnts[0].x), Rez::guiX(geom->pnts[0].y));
}
else if (geom->poles == 4) {
path.cubicTo(Rez::guiX(geom->pnts[2].x), Rez::guiX(geom->pnts[2].y),
Rez::guiX(geom->pnts[1].x), Rez::guiX(geom->pnts[1].y),
Rez::guiX(geom->pnts[0].x), Rez::guiX(geom->pnts[0].y));
}
else {//can only handle lines, quads, cubes
Base::Console().Error("Bad pole count (%d) for BezierSegment\n", geom->poles);
auto itBez = geom->pnts.begin() + 1;
for (; itBez != geom->pnts.end(); itBez++) {
path.lineTo(Rez::guiX((*itBez).x),
Rez::guiX((*itBez).y));//show something for debugging
}
}
}
else {
// Move painter to the beginning
path.moveTo(Rez::guiX(geom->pnts[0].x), Rez::guiX(geom->pnts[0].y));
if (geom->poles == 2) {
// Degree 1 bezier = straight line...
path.lineTo(Rez::guiX(geom->pnts[1].x), Rez::guiX(geom->pnts[1].y));
}
else if (geom->poles == 3) {
path.quadTo(Rez::guiX(geom->pnts[1].x), Rez::guiX(geom->pnts[1].y),
Rez::guiX(geom->pnts[2].x), Rez::guiX(geom->pnts[2].y));
}
else if (geom->poles == 4) {
path.cubicTo(Rez::guiX(geom->pnts[1].x), Rez::guiX(geom->pnts[1].y),
Rez::guiX(geom->pnts[2].x), Rez::guiX(geom->pnts[2].y),
Rez::guiX(geom->pnts[3].x), Rez::guiX(geom->pnts[3].y));
}
else {//can only handle lines, quads, cubes
Base::Console().Error("Bad pole count (%d) for BezierSegment\n", geom->poles);
auto itBez = geom->pnts.begin() + 1;
for (; itBez != geom->pnts.end(); itBez++) {
path.lineTo(Rez::guiX((*itBez).x),
Rez::guiX((*itBez).y));//show something for debugging
}
}
}
} break;
case TechDraw::BSPLINE: {
TechDraw::BSplinePtr geom = std::static_pointer_cast<TechDraw::BSpline>(baseGeom);
if (baseGeom->getReversed()) {
// Move painter to the end of our last segment
std::vector<TechDraw::BezierSegment>::const_reverse_iterator it =
geom->segments.rbegin();
Base::Vector3d rStart = it->pnts.back();
path.moveTo(Rez::guiX(rStart.x), Rez::guiX(rStart.y));
for (; it != geom->segments.rend(); ++it) {
// At this point, the painter is either at the beginning
// of the first segment, or end of the last
if (it->poles == 2) {
// Degree 1 bezier = straight line...
path.lineTo(Rez::guiX(it->pnts[0].x), Rez::guiX(it->pnts[0].y));
}
else if (it->poles == 3) {
path.quadTo(Rez::guiX(it->pnts[1].x), Rez::guiX(it->pnts[1].y),
Rez::guiX(it->pnts[0].x), Rez::guiX(it->pnts[0].y));
}
else if (it->poles == 4) {
path.cubicTo(Rez::guiX(it->pnts[2].x), Rez::guiX(it->pnts[2].y),
Rez::guiX(it->pnts[1].x), Rez::guiX(it->pnts[1].y),
Rez::guiX(it->pnts[0].x), Rez::guiX(it->pnts[0].y));
}
else {//can only handle lines, quads, cubes
Base::Console().Error(
"Bad pole count (%d) for BezierSegment of B-spline geometry\n",
it->poles);
path.lineTo(it->pnts[1].x, it->pnts[1].y);//show something for debugging
}
}
}
else {
// Move painter to the beginning of our first segment
std::vector<TechDraw::BezierSegment>::const_iterator it = geom->segments.begin();
path.moveTo(Rez::guiX(it->pnts[0].x), Rez::guiX(it->pnts[0].y));
for (; it != geom->segments.end(); ++it) {
// At this point, the painter is either at the beginning
// of the first segment, or end of the last
if (it->poles == 2) {
// Degree 1 bezier = straight line...
path.lineTo(Rez::guiX(it->pnts[1].x), Rez::guiX(it->pnts[1].y));
}
else if (it->poles == 3) {
path.quadTo(Rez::guiX(it->pnts[1].x), Rez::guiX(it->pnts[1].y),
Rez::guiX(it->pnts[2].x), Rez::guiX(it->pnts[2].y));
}
else if (it->poles == 4) {
path.cubicTo(Rez::guiX(it->pnts[1].x), Rez::guiX(it->pnts[1].y),
Rez::guiX(it->pnts[2].x), Rez::guiX(it->pnts[2].y),
Rez::guiX(it->pnts[3].x), Rez::guiX(it->pnts[3].y));
}
else {
Base::Console().Error(
"Bad pole count (%d) for BezierSegment of B-spline geometry\n",
it->poles);
path.lineTo(it->pnts[1].x, it->pnts[1].y);//show something for debugging
}
}
}
} break;
case TechDraw::GENERIC: {
TechDraw::GenericPtr geom = std::static_pointer_cast<TechDraw::Generic>(baseGeom);
if (baseGeom->getReversed()) {
if (!geom->points.empty()) {
Base::Vector3d rStart = geom->points.back();
path.moveTo(Rez::guiX(rStart.x), Rez::guiX(rStart.y));
}
std::vector<Base::Vector3d>::const_reverse_iterator it = geom->points.rbegin();
for (++it; it != geom->points.rend(); ++it) {
path.lineTo(Rez::guiX((*it).x), Rez::guiX((*it).y));
}
}
else {
path.moveTo(Rez::guiX(geom->points[0].x), Rez::guiX(geom->points[0].y));
std::vector<Base::Vector3d>::const_iterator it = geom->points.begin();
for (++it; it != geom->points.end(); ++it) {
path.lineTo(Rez::guiX((*it).x), Rez::guiX((*it).y));
}
}
} break;
default: {
Base::Console().Error("Error - geomToPainterPath - UNKNOWN geomType: %d\n",
static_cast<int>(baseGeom->getGeomType()));
} break;
}//sb end of switch
//old rotate path logic. now done on App side.
// if (rot != 0.0) {
// QTransform t;
// t.rotate(-rot);
// path = t.map(path);
// }
return path;
}
// As called by arc of ellipse case:
// pathArc(path, geom->major, geom->minor, geom->angle, geom->largeArc, geom->cw,
// geom->endPnt.x, geom->endPnt.y,
// geom->startPnt.x, geom->startPnt.y);
void PathBuilder::pathArc(QPainterPath& path, double rx, double ry, double x_axis_rotation,
bool large_arc_flag, bool sweep_flag, double x, double y, double curx,
double cury) const
{
double sin_th, cos_th;
double a00, a01, a10, a11;
double x0, y0, x1, y1, xc, yc;
double d, sfactor, sfactor_sq;
double th0, th1, th_arc;
int i, n_segs;
double dx, dy, dx1, dy1, Pr1, Pr2, Px, Py, check;
rx = qAbs(rx);
ry = qAbs(ry);
sin_th = qSin(x_axis_rotation);
cos_th = qCos(x_axis_rotation);
dx = (curx - x) / 2.0;
dy = (cury - y) / 2.0;
dx1 = cos_th * dx + sin_th * dy;
dy1 = -sin_th * dx + cos_th * dy;
Pr1 = rx * rx;
Pr2 = ry * ry;
Px = dx1 * dx1;
Py = dy1 * dy1;
/* Spec : check if radii are large enough */
check = Px / Pr1 + Py / Pr2;
if (check > 1) {
rx = rx * qSqrt(check);
ry = ry * qSqrt(check);
}
a00 = cos_th / rx;
a01 = sin_th / rx;
a10 = -sin_th / ry;
a11 = cos_th / ry;
x0 = a00 * curx + a01 * cury;
y0 = a10 * curx + a11 * cury;
x1 = a00 * x + a01 * y;
y1 = a10 * x + a11 * y;
/* (x0, y0) is current point in transformed coordinate space.
(x1, y1) is new point in transformed coordinate space.
The arc fits a unit-radius circle in this space.
*/
d = (x1 - x0) * (x1 - x0) + (y1 - y0) * (y1 - y0);
sfactor_sq = 1.0 / d - 0.25;
if (sfactor_sq < 0)
sfactor_sq = 0;
sfactor = qSqrt(sfactor_sq);
if (sweep_flag == large_arc_flag)
sfactor = -sfactor;
xc = 0.5 * (x0 + x1) - sfactor * (y1 - y0);
yc = 0.5 * (y0 + y1) + sfactor * (x1 - x0);
/* (xc, yc) is center of the circle. */
th0 = qAtan2(y0 - yc, x0 - xc);
th1 = qAtan2(y1 - yc, x1 - xc);
th_arc = th1 - th0;
if (th_arc < 0 && sweep_flag)
th_arc += 2 * M_PI;
else if (th_arc > 0 && !sweep_flag)
th_arc -= 2 * M_PI;
n_segs = qCeil(qAbs(th_arc / (M_PI * 0.5 + 0.001)));
path.moveTo(curx, cury);
for (i = 0; i < n_segs; i++) {
pathArcSegment(path, xc, yc, th0 + i * th_arc / n_segs, th0 + (i + 1) * th_arc / n_segs, rx,
ry, x_axis_rotation);
}
}
void PathBuilder::pathArcSegment(QPainterPath& path, double xc, double yc, double th0, double th1,
double rx, double ry, double xAxisRotation) const
{
double sinTh, cosTh;
double a00, a01, a10, a11;
double x1, y1, x2, y2, x3, y3;
double t;
double thHalf;
sinTh = qSin(xAxisRotation);
cosTh = qCos(xAxisRotation);
a00 = cosTh * rx;
a01 = -sinTh * ry;
a10 = sinTh * rx;
a11 = cosTh * ry;
thHalf = 0.5 * (th1 - th0);
t = (8.0 / 3.0) * qSin(thHalf * 0.5) * qSin(thHalf * 0.5) / qSin(thHalf);
x1 = xc + qCos(th0) - t * qSin(th0);
y1 = yc + qSin(th0) + t * qCos(th0);
x3 = xc + qCos(th1);
y3 = yc + qSin(th1);
x2 = x3 + t * qSin(th1);
y2 = y3 - t * qCos(th1);
path.cubicTo(a00 * x1 + a01 * y1, a10 * x1 + a11 * y1, a00 * x2 + a01 * y2, a10 * x2 + a11 * y2,
a00 * x3 + a01 * y3, a10 * x3 + a11 * y3);
}
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