258 lines
8.2 KiB
C++
258 lines
8.2 KiB
C++
/****************************************************************************
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**
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** This file is part of the LibreCAD project, a 2D CAD program
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**
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** Copyright (C) 2010 R. van Twisk (librecad@rvt.dds.nl)
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** Copyright (C) 2001-2003 RibbonSoft. All rights reserved.
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**
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**
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** This file may be distributed and/or modified under the terms of the
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** GNU General Public License version 2 as published by the Free Software
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** Foundation and appearing in the file gpl-2.0.txt included in the
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** packaging of this file.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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**
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** This copyright notice MUST APPEAR in all copies of the script!
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**
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**********************************************************************/
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#ifndef RS_ARC_H
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#define RS_ARC_H
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#include "rs_atomicentity.h"
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class LC_Quadratic;
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/**
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* Holds the data that defines an arc.
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*/
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struct RS_ArcData {
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RS_ArcData() = default;
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~RS_ArcData() = default;
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RS_ArcData(const RS_Vector& center,
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double radius,
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double angle1, double angle2,
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bool reversed);
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void reset();
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bool isValid() const;
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RS_Vector center;
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double radius;
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double angle1;
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double angle2;
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bool reversed;
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};
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std::ostream& operator << (std::ostream& os, const RS_ArcData& ad);
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/**
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* Class for an arc entity. All angles are in Rad.
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*
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* @author Andrew Mustun
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*/
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class RS_Arc : public RS_AtomicEntity {
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public:
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RS_Arc()=default;
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RS_Arc(RS_EntityContainer* parent,
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const RS_ArcData& d);
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RS_Entity* clone() const override;
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/** @return RS2::EntityArc */
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RS2::EntityType rtti() const override
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{
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return RS2::EntityArc;
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}
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/** @return true */
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bool isEdge() const override {
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return true;
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}
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/** @return Copy of data that defines the arc. **/
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RS_ArcData getData() const {
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return data;
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}
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RS_VectorSolutions getRefPoints() const override;
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/** Sets new arc parameters. **/
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void setData(RS_ArcData d) {
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data = d;
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}
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/** @return The center point (x) of this arc */
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RS_Vector getCenter() const override {
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return data.center;
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}
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/** Sets new center. */
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void setCenter(const RS_Vector& c) {
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data.center = c;
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}
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/** @return The radius of this arc */
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double getRadius() const override {
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return data.radius;
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}
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/** Sets new radius. */
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void setRadius(double r) {
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data.radius = r;
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}
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/** @return The start angle of this arc */
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double getAngle1() const {
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return data.angle1;
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}
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/** Sets new start angle. */
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void setAngle1(double a1) {
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data.angle1 = a1;
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}
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/** @return The end angle of this arc */
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double getAngle2() const {
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return data.angle2;
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}
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/** Sets new end angle. */
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void setAngle2(double a2) {
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data.angle2 = a2;
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}
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/** get angle relative arc center*/
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double getArcAngle(const RS_Vector& vp) {
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return (vp - data.center).angle();
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}
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/**
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* @return Direction 1. The angle at which the arc starts at
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* the startpoint.
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*/
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double getDirection1() const override;
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/**
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* @return Direction 2. The angle at which the arc starts at
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* the endpoint.
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*/
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double getDirection2() const override;
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/**
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* @retval true if the arc is reversed (clockwise),
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* @retval false otherwise
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*/
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bool isReversed() const {
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return data.reversed;
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}
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/** sets the reversed status. */
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void setReversed(bool r) {
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data.reversed = r;
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}
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/** @return Start point of the entity. */
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RS_Vector getStartpoint() const override;
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/** @return End point of the entity. */
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RS_Vector getEndpoint() const override;
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std::vector<RS_Entity* > offsetTwoSides(const double& distance) const override;
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/**
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* implementations must revert the direction of an atomic entity
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*/
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void revertDirection() override;
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void correctAngles();//make sure angleLength() is not more than 2*M_PI
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void moveStartpoint(const RS_Vector& pos) override;
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void moveEndpoint(const RS_Vector& pos) override;
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bool offset(const RS_Vector& position, const double& distance) override;
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void trimStartpoint(const RS_Vector& pos) override;
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void trimEndpoint(const RS_Vector& pos) override;
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RS2::Ending getTrimPoint(const RS_Vector& coord,
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const RS_Vector& trimPoint) override;
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/** choose an intersection to trim to based on mouse point */
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RS_Vector prepareTrim(const RS_Vector& mousePoint,
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const RS_VectorSolutions& trimSol)override;
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void reverse() override;
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RS_Vector getMiddlePoint() const override;
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double getAngleLength() const;
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double getLength() const override;
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double getBulge() const;
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bool createFrom3P(const RS_Vector& p1, const RS_Vector& p2,
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const RS_Vector& p3);
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bool createFrom2PDirectionRadius(const RS_Vector& startPoint, const RS_Vector& endPoint,
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double direction1, double radius);
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bool createFrom2PDirectionAngle(const RS_Vector& startPoint, const RS_Vector& endPoint,
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double direction1, double angleLength);
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bool createFrom2PBulge(const RS_Vector& startPoint, const RS_Vector& endPoint,
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double bulge);
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RS_Vector getNearestEndpoint(const RS_Vector& coord,
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double* dist = nullptr) const override;
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RS_Vector getNearestPointOnEntity(const RS_Vector& coord,
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bool onEntity = true,
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double* dist = nullptr,
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RS_Entity** entity=nullptr) const override;
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RS_Vector getNearestCenter(const RS_Vector& coord,
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double* dist = nullptr) const override;
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RS_Vector getNearestMiddle(const RS_Vector& coord,
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double* dist = nullptr,
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int middlePoints = 1
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) const override;
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RS_Vector getNearestDist(double distance,
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const RS_Vector& coord,
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double* dist = nullptr) const override;
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RS_Vector getNearestDist(double distance,
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bool startp) const override;
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RS_Vector getNearestOrthTan(const RS_Vector& coord,
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const RS_Line& normal,
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bool onEntity = false) const override;
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RS_VectorSolutions getTangentPoint(const RS_Vector& point) const override;//find the tangential points seeing from given point
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RS_Vector getTangentDirection(const RS_Vector& point) const override;
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void move(const RS_Vector& offset) override;
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void rotate(const RS_Vector& center, const double& angle) override;
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void rotate(const RS_Vector& center, const RS_Vector& angleVector) override;
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void scale(const RS_Vector& center, const RS_Vector& factor) override;
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void mirror(const RS_Vector& axisPoint1, const RS_Vector& axisPoint2) override;
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void moveRef(const RS_Vector& ref, const RS_Vector& offset) override;
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void stretch(const RS_Vector& firstCorner,
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const RS_Vector& secondCorner,
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const RS_Vector& offset) override;
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/** find the visible part of the arc, and call drawVisible() to draw */
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void draw(RS_Painter* painter, RS_GraphicView* view, double& patternOffset) override;
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/** directly draw the arc, assuming the whole arc is within visible window */
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void drawVisible(RS_Painter* painter, RS_GraphicView* view, double& patternOffset);
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friend std::ostream& operator << (std::ostream& os, const RS_Arc& a);
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virtual void calculateBorders() override;
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/** return the equation of the entity
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for quadratic,
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return a vector contains:
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m0 x^2 + m1 xy + m2 y^2 + m3 x + m4 y + m5 =0
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for linear:
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m0 x + m1 y + m2 =0
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**/
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virtual LC_Quadratic getQuadratic() const override;
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/**
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* @brief areaLineIntegral, line integral for contour area calculation by Green's Theorem
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* Contour Area =\oint x dy
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* @return line integral \oint x dy along the entity
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* \oint x dy = c_x r \sin t + \frac{1}{4}r^2\sin 2t + \frac{1}{2}r^2 t
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*/
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virtual double areaLineIntegral() const override;
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protected:
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RS_ArcData data;
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};
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#endif
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