/**
* @return Middle point of the entity.
*/
RS_Vector RS_Arc::getMiddlepoint() const {
double a;
RS_Vector ret;
if (isReversed()) {
a = data.angle1 - getAngleLength()/2.0;
} else {
a = data.angle1 + getAngleLength()/2.0;
}
ret.setPolar(data.radius, a);
ret+=data.center;
return ret;
}
/**
* Gets the arc's bulge (tangens of angle length divided by 4).
*/
double RS_Arc::getBulge() const {
double bulge = tan(fabs(getAngleLength())/4.0);
if (isReversed()) {
bulge*=-1;
}
return bulge;
}
void RS_Ellipse::draw(RS_Painter* painter, RS_GraphicView* view, double patternOffset) {
if (painter==NULL || view==NULL) {
return;
}
if (getPen().getLineType()==RS2::SolidLine ||
isSelected() ||
view->getDrawingMode()==RS2::ModePreview) {
painter->drawEllipse(view->toGui(getCenter()),
getMajorRadius() * view->getFactor().x,
getMinorRadius() * view->getFactor().x,
getAngle(),
getAngle1(), getAngle2(),
isReversed());
} else {
double styleFactor = getStyleFactor(view);
if (styleFactor<0.0) {
painter->drawEllipse(view->toGui(getCenter()),
getMajorRadius() * view->getFactor().x,
getMinorRadius() * view->getFactor().x,
getAngle(),
getAngle1(), getAngle2(),
isReversed());
return;
}
// Pattern:
RS_LineTypePattern* pat;
if (isSelected()) {
pat = &patternSelected;
} else {
pat = view->getPattern(getPen().getLineType());
}
if (pat==NULL) {
return;
}
// Pen to draw pattern is always solid:
RS_Pen pen = painter->getPen();
pen.setLineType(RS2::SolidLine);
painter->setPen(pen);
double* da; // array of distances in x.
int i; // index counter
double length = getAngleLength();
// create pattern:
da = new double[pat->num];
double tot=0.0;
i=0;
bool done = false;
double curA = getAngle1();
double curR;
RS_Vector cp = view->toGui(getCenter());
double r1 = getMajorRadius() * view->getFactor().x;
double r2 = getMinorRadius() * view->getFactor().x;
do {
curR = sqrt(RS_Math::pow(getMinorRadius()*cos(curA), 2.0)
+ RS_Math::pow(getMajorRadius()*sin(curA), 2.0));
if (curR>1.0e-6) {
da[i] = fabs(pat->pattern[i] * styleFactor) / curR;
if (pat->pattern[i] * styleFactor > 0.0) {
if (tot+fabs(da[i])<length) {
painter->drawEllipse(cp,
r1, r2,
getAngle(),
curA,
curA + da[i],
false);
} else {
painter->drawEllipse(cp,
r1, r2,
getAngle(),
curA,
getAngle2(),
false);
}
}
}
curA+=da[i];
tot+=fabs(da[i]);
done=tot>length;
i++;
if (i>=pat->num) {
i=0;
}
} while(!done);
delete[] da;
}
}
double RArc::getArea() const {
return (radius*radius*getAngleLength(false)) / 2.0;
}
double RArc::getLength() const {
return fabs(getAngleLength(false)) * radius;
}
/**
* @return Length of the arc.
*/
double RS_Arc::getLength() {
return getAngleLength()*data.radius;
}
void RS_Arc::draw(RS_Painter* painter, RS_GraphicView* view,
double /*patternOffset*/) {
if (painter==NULL || view==NULL) {
return;
}
//double styleFactor = getStyleFactor();
// simple style-less lines
if (getPen().getLineType()==RS2::SolidLine ||
isSelected() ||
view->getDrawingMode()==RS2::ModePreview) {
painter->drawArc(view->toGui(getCenter()),
getRadius() * view->getFactor().x,
getAngle1(), getAngle2(),
isReversed());
} else {
double styleFactor = getStyleFactor(view);
if (styleFactor<0.0) {
painter->drawArc(view->toGui(getCenter()),
getRadius() * view->getFactor().x,
getAngle1(), getAngle2(),
isReversed());
return;
}
// Pattern:
RS_LineTypePattern* pat;
if (isSelected()) {
pat = &patternSelected;
} else {
pat = view->getPattern(getPen().getLineType());
}
if (pat==NULL) {
return;
}
if (getRadius()<1.0e-6) {
return;
}
// Pen to draw pattern is always solid:
RS_Pen pen = painter->getPen();
pen.setLineType(RS2::SolidLine);
painter->setPen(pen);
double a1;
double a2;
if (data.reversed) {
a2 = getAngle1();
a1 = getAngle2();
} else {
a1 = getAngle1();
a2 = getAngle2();
}
double* da; // array of distances in x.
int i; // index counter
double length = getAngleLength();
// create scaled pattern:
da = new double[pat->num];
for (i=0; i<pat->num; ++i) {
da[i] = fabs(pat->pattern[i] * styleFactor) / getRadius();
}
double tot=0.0;
i=0;
bool done = false;
double curA = a1;
//double cx = getCenter().x * factor.x + offsetX;
//double cy = - a->getCenter().y * factor.y + getHeight() - offsetY;
RS_Vector cp = view->toGui(getCenter());
double r = getRadius() * view->getFactor().x;
do {
if (pat->pattern[i] > 0.0) {
if (tot+da[i]<length) {
painter->drawArc(cp, r,
curA,
curA + da[i],
false);
} else {
painter->drawArc(cp, r,
curA,
a2,
false);
}
}
curA+=da[i];
tot+=da[i];
done=tot>length;
i++;
if (i>=pat->num) {
i=0;
}
} while(!done);
delete[] da;
}
}
