/**************************************************************************** ** ** This file is part of the LibreCAD project, a 2D CAD program ** ** Copyright (C) 2010 R. van Twisk (librecad@rvt.dds.nl) ** Copyright (C) 2001-2003 RibbonSoft. All rights reserved. ** ** ** This file may be distributed and/or modified under the terms of the ** GNU General Public License version 2 as published by the Free Software ** Foundation and appearing in the file gpl-2.0.txt included in the ** packaging of this file. ** ** This program 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 General Public License for more details. ** ** You should have received a copy of the GNU General Public License ** along with this program; if not, write to the Free Software ** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA ** ** This copyright notice MUST APPEAR in all copies of the script! ** **********************************************************************/ #ifndef RS_ARC_H #define RS_ARC_H #include "rs_atomicentity.h" class LC_Quadratic; /** * Holds the data that defines an arc. */ struct RS_ArcData { RS_ArcData() = default; ~RS_ArcData() = default; RS_ArcData(const RS_Vector& center, double radius, double angle1, double angle2, bool reversed); void reset(); bool isValid() const; RS_Vector center; double radius; double angle1; double angle2; bool reversed; }; std::ostream& operator << (std::ostream& os, const RS_ArcData& ad); /** * Class for an arc entity. All angles are in Rad. * * @author Andrew Mustun */ class RS_Arc : public RS_AtomicEntity { public: RS_Arc()=default; RS_Arc(RS_EntityContainer* parent, const RS_ArcData& d); RS_Entity* clone() const override; /** @return RS2::EntityArc */ RS2::EntityType rtti() const override { return RS2::EntityArc; } /** @return true */ bool isEdge() const override { return true; } /** @return Copy of data that defines the arc. **/ RS_ArcData getData() const { return data; } RS_VectorSolutions getRefPoints() const override; /** Sets new arc parameters. **/ void setData(RS_ArcData d) { data = d; } /** @return The center point (x) of this arc */ RS_Vector getCenter() const override { return data.center; } /** Sets new center. */ void setCenter(const RS_Vector& c) { data.center = c; } /** @return The radius of this arc */ double getRadius() const override { return data.radius; } /** Sets new radius. */ void setRadius(double r) { data.radius = r; } /** @return The start angle of this arc */ double getAngle1() const { return data.angle1; } /** Sets new start angle. */ void setAngle1(double a1) { data.angle1 = a1; } /** @return The end angle of this arc */ double getAngle2() const { return data.angle2; } /** Sets new end angle. */ void setAngle2(double a2) { data.angle2 = a2; } /** get angle relative arc center*/ double getArcAngle(const RS_Vector& vp) { return (vp - data.center).angle(); } /** * @return Direction 1. The angle at which the arc starts at * the startpoint. */ double getDirection1() const override; /** * @return Direction 2. The angle at which the arc starts at * the endpoint. */ double getDirection2() const override; /** * @retval true if the arc is reversed (clockwise), * @retval false otherwise */ bool isReversed() const { return data.reversed; } /** sets the reversed status. */ void setReversed(bool r) { data.reversed = r; } /** @return Start point of the entity. */ RS_Vector getStartpoint() const override; /** @return End point of the entity. */ RS_Vector getEndpoint() const override; std::vector offsetTwoSides(const double& distance) const override; /** * implementations must revert the direction of an atomic entity */ void revertDirection() override; void correctAngles();//make sure angleLength() is not more than 2*M_PI void moveStartpoint(const RS_Vector& pos) override; void moveEndpoint(const RS_Vector& pos) override; bool offset(const RS_Vector& position, const double& distance) override; void trimStartpoint(const RS_Vector& pos) override; void trimEndpoint(const RS_Vector& pos) override; RS2::Ending getTrimPoint(const RS_Vector& coord, const RS_Vector& trimPoint) override; /** choose an intersection to trim to based on mouse point */ RS_Vector prepareTrim(const RS_Vector& mousePoint, const RS_VectorSolutions& trimSol)override; void reverse() override; RS_Vector getMiddlePoint() const override; double getAngleLength() const; double getLength() const override; double getBulge() const; bool createFrom3P(const RS_Vector& p1, const RS_Vector& p2, const RS_Vector& p3); bool createFrom2PDirectionRadius(const RS_Vector& startPoint, const RS_Vector& endPoint, double direction1, double radius); bool createFrom2PDirectionAngle(const RS_Vector& startPoint, const RS_Vector& endPoint, double direction1, double angleLength); bool createFrom2PBulge(const RS_Vector& startPoint, const RS_Vector& endPoint, double bulge); RS_Vector getNearestEndpoint(const RS_Vector& coord, double* dist = nullptr) const override; RS_Vector getNearestPointOnEntity(const RS_Vector& coord, bool onEntity = true, double* dist = nullptr, RS_Entity** entity=nullptr) const override; RS_Vector getNearestCenter(const RS_Vector& coord, double* dist = nullptr) const override; RS_Vector getNearestMiddle(const RS_Vector& coord, double* dist = nullptr, int middlePoints = 1 ) const override; RS_Vector getNearestDist(double distance, const RS_Vector& coord, double* dist = nullptr) const override; RS_Vector getNearestDist(double distance, bool startp) const override; RS_Vector getNearestOrthTan(const RS_Vector& coord, const RS_Line& normal, bool onEntity = false) const override; RS_VectorSolutions getTangentPoint(const RS_Vector& point) const override;//find the tangential points seeing from given point RS_Vector getTangentDirection(const RS_Vector& point) const override; void move(const RS_Vector& offset) override; void rotate(const RS_Vector& center, const double& angle) override; void rotate(const RS_Vector& center, const RS_Vector& angleVector) override; void scale(const RS_Vector& center, const RS_Vector& factor) override; void mirror(const RS_Vector& axisPoint1, const RS_Vector& axisPoint2) override; void moveRef(const RS_Vector& ref, const RS_Vector& offset) override; void stretch(const RS_Vector& firstCorner, const RS_Vector& secondCorner, const RS_Vector& offset) override; /** find the visible part of the arc, and call drawVisible() to draw */ void draw(RS_Painter* painter, RS_GraphicView* view, double& patternOffset) override; /** directly draw the arc, assuming the whole arc is within visible window */ void drawVisible(RS_Painter* painter, RS_GraphicView* view, double& patternOffset); friend std::ostream& operator << (std::ostream& os, const RS_Arc& a); virtual void calculateBorders() override; /** return the equation of the entity for quadratic, return a vector contains: m0 x^2 + m1 xy + m2 y^2 + m3 x + m4 y + m5 =0 for linear: m0 x + m1 y + m2 =0 **/ virtual LC_Quadratic getQuadratic() const override; /** * @brief areaLineIntegral, line integral for contour area calculation by Green's Theorem * Contour Area =\oint x dy * @return line integral \oint x dy along the entity * \oint x dy = c_x r \sin t + \frac{1}{4}r^2\sin 2t + \frac{1}{2}r^2 t */ virtual double areaLineIntegral() const override; protected: RS_ArcData data; }; #endif